# Patent

## Title
Transferases and oxidoreductases, nucleic acids encoding them and methods for making and using them

## Abstract

This invention relates generally to enzymes, polynucleotides encoding the enzymes, the use of such polynucleotides and polypeptides and more specifically to enzymes having transferase activity, e.g., transaminase activity, e.g., d-amino-acid transferase activity, and/or oxidoreductase activity, e.g., dehydrogenase activity, e.g., d-amino-acid dehydrogenase activity, and/or catalyze the transfer of a chemical group, catalyze transamination, catalyze the reaction: D-alanine+2-oxoglutarate<=>pyruvate+D-glutamate, and/or catalyze an oxidation-reduction reaction, catalyze the removal of hydrogen atoms, and/or catalyze the reaction: D-amino acid+H2O+acceptor<=>a 2-oxo acid+NH3+reduced acceptor.

## Background
SEQUENCE LISTING
This application includes a computer readable form of a biotechnology sequence listing in accordance with 37 C.F.R. §1.821 through 1.825 and submitted via EFS-Web in accordance with MPEP §502.05(IX). The computer readable form of the sequence listing is in American Standard Code for Information Interchange (ASCII) text (.txt) format and the entire content of this sequence listing is hereby incorporated by reference into the specification of this application for all purposes. The sequence listing is identified on the electronically filed .txt file as follows:












File Name
Date of Creation
Size







SeqListingD124013ND1.txt
Jan. 29, 2014
3.43 MB




(3,598,504 bytes)









FIELD OF THE INVENTION
This invention relates generally to enzymes, polynucleotides encoding the enzymes, the use of such polynucleotides and polypeptides and more specifically to enzymes having transferase activity, e.g., transaminase activity, e.g., d-amino-acid transferase activity, and/or oxidoreductase activity, e.g., dehydrogenase activity, e.g., d-amino-acid dehydrogenase activity, and/or catalyze the transfer of a chemical group, catalyze transamination, catalyze the reaction: D-alanine+2-oxoglutarate<=>pyruvate+D-glutamate, and/or catalyze an oxidation-reduction reaction, catalyze the removal of hydrogen atoms, and/or catalyze the reaction: D-amino acid+H2O+acceptor<=>a 2-oxo acid+NH3+reduced acceptor. Thus, the invention provides enzymes, compositions and/or methods for the production of pharmaceutical (drug) compositions, pharmaceutical (drug) precursors and/or intermediates (including antibiotics) sweeteners, peptide enzymes, peptide hormones, fuel and fuel additive compositions, foods and food additives, beverage and beverage additives, feeds and feed additives, drugs and drug additives, dietary supplements, textiles, wood, paper, pulp, and detergents comprising the polypeptides or polynucleotides in accordance with the invention.
BACKGROUND
Transferases and/or oxidoreductases catalyze the transfer of a chemical group, catalyze transamination, catalyze the reaction: D-alanine+2-oxoglutarate<=>pyruvate+D-glutamate, and/or catalyze an oxidation-reduction reaction, catalyze the removal of hydrogen atoms, and/or catalyze the reaction: D-amino acid+H2O+acceptor<=>a 2-oxo acid+NH3+reduced acceptor. Transferases, e.g., transaminases, e.g., d-amino-acid transferases (also referred to as “d-aminotransferases” or “D-ATs”), and/or oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases are of considerable commercial value, being used in the pharmaceutical industry, in the food, feed and beverage industries, e.g. for the production of sweeteners, in the wood/paper industry and in the fuel industry.
SUMMARY OF THE INVENTION
This invention provides enzymes having transferase activity, e.g., transaminase activity, e.g., d-amino-acid transferase activity, and/or oxidoreductase activity, e.g., dehydrogenase activity, e.g., d-amino-acid dehydrogenase activity, and/or catalyze the transfer of a chemical group, catalyze transamination, catalyze the reaction: D-alanine+2-oxoglutarate<=>pyruvate+D-glutamate, and/or catalyze an oxidation-reduction reaction, catalyze the removal of hydrogen atoms, and/or catalyze the reaction: D-amino acid+H2O+acceptor<=>a 2-oxo acid+NH3+reduced acceptor. The invention further provides enzymes having transferase activity, e.g., transaminase activity, e.g., d-amino-acid transferase activity, and/or oxidoreductase activity, e.g., dehydrogenase activity, e.g., d-amino-acid dehydrogenase activity and nucleic acids encoding them, vectors and cells comprising them, probes for amplifying and identifying these transferase-, e.g., transaminase-, e.g., d-amino-acid transferase-, and/or oxidoreductase-, e.g., dehydrogenase-, e.g., d-amino-acid dehydrogenase-encoding nucleic acids, and methods for making and using these polypeptides and peptides.
The invention provides enzymes, compositions and/or methods for the production of pharmaceutical (drug) compositions, pharmaceutical (drug) precursors and/or intermediates (including antibiotics) sweeteners, peptide enzymes, peptide hormones, fuel and fuel additive compositions, foods and food additives, beverage and beverage additives, feeds and feed additives, drugs and drug additives, dietary supplements, textiles, wood, paper, pulp, and detergents comprising the polypeptides or polynucleotides in accordance with the invention. These compositions can be formulated in a variety of forms, such as tablets, gels, pills, implants, liquids, sprays, films, micelles, powders, food, feed pellets or as any type of encapsulated form.
In some embodiments, the transferases, e.g., transaminases, e.g., d-amino-acid transferases, and/or oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases and/or compositions thereof may be useful in pharmaceutical, industrial, and/or agricultural contexts.
In some embodiments, the transferases, e.g., transaminases, e.g., d-amino-acid transferases and/or compositions thereof may be useful for catalyzing a reaction between an amino acid and an α-keto acid. In some embodiments, the transferases, e.g., transaminases, e.g., d-amino-acid transferases and/or compositions thereof may be useful for catalyzing a transamination reaction. In some embodiments, the transferases, e.g., transaminases, e.g., d-amino-acid transferases and/or compositions thereof may be useful for catalyzing a reaction that removes the amino group from the amino acid leaving an α-keto acid, and transferring the amino group to a reactant α-keto acid converting it into an amino acid. In alternative embodiments, the transferases, e.g., transaminases, e.g., d-amino-acid transferases and/or compositions thereof may be useful in the production of amino acids.
In some embodiments, the oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases and/or compositions thereof may be useful in catalyzing a reaction that oxidizes a substrate by transferring one or more protons and a pair of electrons to an acceptor.
In some embodiments, the oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases and/or compositions thereof may be useful in catalyzing a reaction that transfers electrons from one molecule to another. In some embodiments, the oxidoreductase and/or compositions thereof may be useful in catalyzing a reaction that transfers electrons from the reductant to the oxidant.
In some embodiments, transferases, e.g., transaminases, e.g., d-amino-acid transferases are provided that facilitate the production of indole-3-pyruvate. In some embodiments, transferases, e.g., transaminases, e.g., d-amino-acid transferases are provided that facilitate the production of RR-Monatin.
In alternative embodiments, the transferases, e.g., transaminases, e.g., d-amino-acid transferases, and/or oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases of the invention and/or compositions thereof may be useful in diagnosing and tracking many diseases, e.g. liver damage/disease or myocardial infarctions. In alternative embodiments, the transferases, e.g., transaminases, e.g., d-amino-acid transferases, and/or oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases of the invention and/or combinations thereof are used in pharmaceutical (drug) compositions for the diagnosis, tracking or treatment of any condition and/or disease, e.g. liver damage/disease or myocardial infarctions.
In alternative embodiments, the invention provides enzymes and processes for the bioconversion of any biomass into fuel, e.g. biofuel, e.g., ethanol, propanol, butanol, methanol, and/or biodiesel or biofuels such as synthetic liquids or gases, such as syngas, and the production of other fermentation products, e.g. succinic acid, lactic acid, or acetic acid.
In alternative embodiments, the invention provides polypeptides (and the nucleic acids that encode them) having at least one conservative amino acid substitution and retaining its transferase activity, e.g., transaminase activity, e.g., d-amino-acid transferase activity, and/or oxidoreductase activity, e.g., dehydrogenase activity, e.g., d-amino-acid dehydrogenase activity; or, wherein the at least one conservative amino acid substitution comprises substituting an amino acid with another amino acid of like characteristics; or, a conservative substitution comprises: replacement of an aliphatic amino acid with another aliphatic amino acid; replacement of a serine with a threonine or vice versa; replacement of an acidic residue with another acidic residue; replacement of a residue bearing an amide group with another residue bearing an amide group; exchange of a basic residue with another basic residue; or replacement of an aromatic residue with another aromatic residue;
In alternative embodiments, the invention provides polypeptides (and the nucleic acids that encode them) having a transferase activity, e.g., a transaminase activity, e.g., a d-amino-acid transferase activity or an omega- (or ω-) transaminase activity, and/or an oxidoreductase activity, e.g., a dehydrogenase activity, e.g., a d-amino-acid dehydrogenase activity but lacking a signal sequence, a prepro domain, a binding domain, and/or other domain; and in one aspect, the binding domain comprises, or consists of, a NAD, a NAD(P), a calcium, a thiamine, a FAD, a zinc, a DNA and/or a lipoyl binding domain.
In alternative embodiments, the invention provides polypeptides (and the nucleic acids that encode them) having a transferase activity, e.g., a transaminase activity, e.g., a d-amino-acid transferase activity or a ω-transaminase activity, and/or an oxidoreductase activity, e.g., a dehydrogenase activity, e.g., a d-amino-acid dehydrogenase activity further comprising a heterologous sequence; and in one aspect, the heterologous sequence comprises, or consists of a sequence encoding: (i) a heterologous signal sequence, a heterologous domain, a heterologous binding domain, a heterologous dockerin domain, a heterologous catalytic domain (CD), or a combination thereof; (ii) the sequence of (i), wherein the heterologous signal sequence, binding domain or catalytic domain (CD) is derived from a heterologous enzyme; or, (iii) a tag, an epitope, a targeting peptide, a cleavable sequence, a detectable moiety or an enzyme; and in one aspect, the heterologous binding domain comprises, or consists of, a NAD, a NAD(P), a calcium, a thiamine, a FAD, a zinc, a DNA and/or a lipoyl binding domain; and in one aspect, the heterologous signal sequence targets the encoded protein to a vacuole, the endoplasmic reticulum, a chloroplast or a starch granule.
In alternative embodiments, the invention provides polypeptides (and the nucleic acids that encode them) having a transferase activity, e.g., a transaminase activity, e.g., a d-amino-acid transferase activity or a ω-transaminase activity, or the transaminase activity is an omega transaminase activity that catalyzes the conversion of isobutylamine to isobutyraldehyde; and/or an oxidoreductase activity, e.g., a dehydrogenase activity, e.g., a d-amino-acid dehydrogenase activity, wherein the polypeptides are cofactor dependent or cofactor independent. In one embodiment, a cofactor dependent polypeptide requires the presence of a non-protein component to be functional. In one embodiment, the cofactor comprises a metal ion, a coenzyme, a pyridoxal-phosphate and or a phosphopantetheine.
The invention provides isolated, synthetic or recombinant nucleic acids comprising (a) a nucleic acid (polynucleotide) encoding at least one polypeptide, wherein the nucleic acid comprises a sequence having at least about 50%, 51%, 52%, 53%, 54%, 55%, 56%, 57%, 58%, 59%, 60%, 61%, 62%, 63%, 64%, 65%, 66%, 67%, 68%, 69%, 70%, 71%, 72%, 73%, 74%, 75%, 76%, 77%, 78%, 79%, 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or more or complete (100%) sequence identity to the nucleic acid (polynucleotide) sequence of SEQ ID NO:1, SEQ ID NO:3, SEQ ID NO:5, SEQ ID NO:7, SEQ ID NO:9, SEQ ID NO:11, SEQ ID NO:13, SEQ ID NO:15, SEQ ID NO:17, SEQ ID NO:19, SEQ ID NO:21, SEQ ID NO:23, SEQ ID NO:25, SEQ ID NO:27, SEQ ID NO:29, SEQ ID NO:31, SEQ ID NO:33, SEQ ID NO:35, SEQ ID NO:37, SEQ ID NO:39, SEQ ID NO:41, SEQ ID NO:43, SEQ ID NO:45, SEQ ID NO:47, SEQ ID NO:49, SEQ ID NO:51, SEQ ID NO:53, SEQ ID NO:55, SEQ ID NO:57, SEQ ID NO:59, SEQ ID NO:61, SEQ ID NO:63, SEQ ID NO:65, SEQ ID NO:67, SEQ ID NO:69, SEQ ID NO:71, SEQ ID NO:73, SEQ ID NO:75, SEQ ID NO:77, SEQ ID NO:79, SEQ ID NO:81, SEQ ID NO:83, SEQ ID NO:85, SEQ ID NO:87, SEQ ID NO:89, SEQ ID NO:91, SEQ ID NO:93, SEQ ID NO:95, SEQ ID NO:97, SEQ ID NO:99, SEQ ID NO:101, SEQ ID NO:103, SEQ ID NO:105, SEQ ID NO:107, SEQ ID NO:109, SEQ ID NO:111, SEQ ID NO:113, SEQ ID NO:115, SEQ ID NO:117, SEQ ID NO:119, SEQ ID NO:121, SEQ ID NO:123, SEQ ID NO:125, SEQ ID NO:127, SEQ ID NO:129, SEQ ID NO:131, SEQ ID NO:133, SEQ ID NO:135, SEQ ID NO:137, SEQ ID NO:139, SEQ ID NO:141, SEQ ID NO:143, SEQ ID NO:145, SEQ ID NO:147, SEQ ID NO:149, SEQ ID NO:151, SEQ ID NO:153, SEQ ID NO:155, SEQ ID NO:157, SEQ ID NO:159, SEQ ID NO:161, SEQ ID NO:163, SEQ ID NO:165, SEQ ID NO:167, SEQ ID NO:169, SEQ ID NO:171, SEQ ID NO:173, SEQ ID NO:175, SEQ ID NO:177, SEQ ID NO:179, SEQ ID NO:181, SEQ ID NO:183, SEQ ID NO:185, SEQ ID NO:187, SEQ ID NO:189, SEQ ID NO:191, SEQ ID NO:193, SEQ ID NO:195, SEQ ID NO:197, SEQ ID NO:199, SEQ ID NO:201, SEQ ID NO:203, SEQ ID NO:205, SEQ ID NO:207, SEQ ID NO:209, SEQ ID NO:211, SEQ ID NO:213, SEQ ID NO:215, SEQ ID NO:217, SEQ ID NO:219, SEQ ID NO:221, SEQ ID NO:223, SEQ ID NO:225, SEQ ID NO:227, SEQ ID NO:229, SEQ ID NO:231, SEQ ID NO:233, SEQ ID NO:235, SEQ ID NO:237, SEQ ID NO:239, SEQ ID NO:241, SEQ ID NO:243, SEQ ID NO:245, SEQ ID NO:247, SEQ ID NO:249, SEQ ID NO:251, SEQ ID NO:253, SEQ ID NO:255, SEQ ID NO:257, SEQ ID NO:259, SEQ ID NO:261, SEQ ID NO:263, SEQ ID NO:265, SEQ ID NO:267, SEQ ID NO:269, SEQ ID NO:271, SEQ ID NO:273, SEQ ID NO:275, SEQ ID NO:277, SEQ ID NO:279, SEQ ID NO:281, SEQ ID NO:283, SEQ ID NO:285, SEQ ID NO:287, SEQ ID NO:289, SEQ ID NO:291, SEQ ID NO:293, SEQ ID NO:295, SEQ ID NO:297, SEQ ID NO:299, SEQ ID NO:301, SEQ ID NO:303, SEQ ID NO:305, SEQ ID NO:307, SEQ ID NO:309, SEQ ID NO:311, SEQ ID NO:313, SEQ ID NO:315, SEQ ID NO:317, SEQ ID NO:319, SEQ ID NO:321, SEQ ID NO:323, SEQ ID NO:325, SEQ ID NO:327, SEQ ID NO:329, SEQ ID NO:331, SEQ ID NO:333, SEQ ID NO:335, SEQ ID NO:337, SEQ ID NO:339, SEQ ID NO:341, SEQ ID NO:343, SEQ ID NO:345, SEQ ID NO:347, SEQ ID NO:349, SEQ ID NO:351, SEQ ID NO:353, SEQ ID NO:355, SEQ ID NO:357, SEQ ID NO:359, SEQ ID NO:361, SEQ ID NO:363, SEQ ID NO:365, SEQ ID NO:367, SEQ ID NO:369, SEQ ID NO:371, SEQ ID NO:373, SEQ ID NO:375, SEQ ID NO:377, SEQ ID NO:379, SEQ ID NO:381, SEQ ID NO:383, SEQ ID NO:385, SEQ ID NO:387, SEQ ID NO:389, SEQ ID NO:391, SEQ ID NO:393, SEQ ID NO:395, SEQ ID NO:397, SEQ ID NO:399, SEQ ID NO:401, SEQ ID NO:403, SEQ ID NO:405, SEQ ID NO:407, SEQ ID NO:409, SEQ ID NO:411, SEQ ID NO:413, SEQ ID NO:415, SEQ ID NO:417, SEQ ID NO:419, SEQ ID NO:421, SEQ ID NO:423, SEQ ID NO:425, SEQ ID NO:427, SEQ ID NO:429, SEQ ID NO:431, SEQ ID NO:433, SEQ ID NO:435, SEQ ID NO:437, SEQ ID NO:439, SEQ ID NO:441, SEQ ID NO:443, SEQ ID NO:445, SEQ ID NO:447, SEQ ID NO:449, SEQ ID NO:451, SEQ ID NO:453, SEQ ID NO:455, SEQ ID NO:457, SEQ ID NO:459, SEQ ID NO:461, SEQ ID NO:463, SEQ ID NO:465, SEQ ID NO:467, SEQ ID NO:469, SEQ ID NO:471, SEQ ID NO:473, SEQ ID NO:475, SEQ ID NO:477, SEQ ID NO:479, SEQ ID NO:481, SEQ ID NO:483, SEQ ID NO:485, SEQ ID NO:487, SEQ ID NO:489, SEQ ID NO:491, SEQ ID NO:493, SEQ ID NO:495, SEQ ID NO:497, SEQ ID NO:499, SEQ ID NO:501, SEQ ID NO:503, SEQ ID NO:505, SEQ ID NO:507, SEQ ID NO:509, SEQ ID NO:511, SEQ ID NO:513, SEQ ID NO:515, SEQ ID NO:517, SEQ ID NO:519, SEQ ID NO:521, SEQ ID NO:523, SEQ ID NO:525, SEQ ID NO:527, SEQ ID NO:529, SEQ ID NO:531, SEQ ID NO:533, SEQ ID NO:535, SEQ ID NO:537, SEQ ID NO:539, SEQ ID NO:541, SEQ ID NO:543, SEQ ID NO:545, SEQ ID NO:547, SEQ ID NO:549, SEQ ID NO:551, SEQ ID NO:553, SEQ ID NO:555, SEQ ID NO:557, SEQ ID NO:559, SEQ ID NO:561, SEQ ID NO:563, SEQ ID NO:565, SEQ ID NO:567, SEQ ID NO:569, SEQ ID NO:571, SEQ ID NO:573, SEQ ID NO:575, SEQ ID NO:577, SEQ ID NO:579, SEQ ID NO:581, SEQ ID NO:583, SEQ ID NO:585, SEQ ID NO:587, SEQ ID NO:589, SEQ ID NO:591, SEQ ID NO:593, SEQ ID NO:595, SEQ ID NO:597, SEQ ID NO:599, SEQ ID NO:601, SEQ ID NO:603, SEQ ID NO:605, SEQ ID NO:607, SEQ ID NO:609, SEQ ID NO:611, SEQ ID NO:613, SEQ ID NO:615, SEQ ID NO:617, SEQ ID NO:619, SEQ ID NO:621, SEQ ID NO:623, SEQ ID NO:625, SEQ ID NO:627, SEQ ID NO:629, SEQ ID NO:631, SEQ ID NO:633, SEQ ID NO:635, SEQ ID NO:637, SEQ ID NO:639, SEQ ID NO:641, SEQ ID NO:643, SEQ ID NO:645, SEQ ID NO:647, SEQ ID NO:649, SEQ ID NO:651, SEQ ID NO:653, SEQ ID NO:655, SEQ ID NO:657, SEQ ID NO:659, SEQ ID NO:661, SEQ ID NO:663, SEQ ID NO:665, SEQ ID NO:667, SEQ ID NO:669, SEQ ID NO:671, SEQ ID NO:673, SEQ ID NO:675, SEQ ID NO:677, SEQ ID NO:679, SEQ ID NO:681, SEQ ID NO:683, SEQ ID NO:685, SEQ ID NO:687, SEQ ID NO:689, SEQ ID NO:691, SEQ ID NO:693, SEQ ID NO:695, SEQ ID NO:697, SEQ ID NO:699, SEQ ID NO:701, SEQ ID NO:703, SEQ ID NO:705, SEQ ID NO:707, SEQ ID NO:709, SEQ ID NO:711, SEQ ID NO:713, SEQ ID NO:715, SEQ ID NO:717, SEQ ID NO:719, SEQ ID NO:721, SEQ ID NO:723, SEQ ID NO:725, SEQ ID NO:727, SEQ ID NO:729, SEQ ID NO:731, SEQ ID NO:733, SEQ ID NO:735, SEQ ID NO:737, SEQ ID NO:739, SEQ ID NO:741, SEQ ID NO:743, SEQ ID NO:745, SEQ ID NO:747, SEQ ID NO:749, SEQ ID NO:751, SEQ ID NO:753, SEQ ID NO:755, SEQ ID NO:757, SEQ ID NO:759, SEQ ID NO:761, SEQ ID NO:763, SEQ ID NO:765, SEQ ID NO:767, SEQ ID NO:769, SEQ ID NO:771, SEQ ID NO:773, SEQ ID NO:775, SEQ ID NO:777, SEQ ID NO:779, SEQ ID NO:781, SEQ ID NO:783, SEQ ID NO:785, SEQ ID NO:787, SEQ ID NO:789, SEQ ID NO:791, SEQ ID NO:793, SEQ ID NO:795, SEQ ID NO:797, SEQ ID NO:799, SEQ ID NO:801, SEQ ID NO:803, SEQ ID NO:805, SEQ ID NO:807, SEQ ID NO:809, SEQ ID NO:811, SEQ ID NO:813, SEQ ID NO:815, SEQ ID NO:817, SEQ ID NO:819, SEQ ID NO:821, SEQ ID NO:823, SEQ ID NO:825, SEQ ID NO:827, SEQ ID NO:829, SEQ ID NO:831, SEQ ID NO:833, SEQ ID NO:835, SEQ ID NO:837, SEQ ID NO:839, SEQ ID NO:841, SEQ ID NO:843, SEQ ID NO:845, SEQ ID NO:847, SEQ ID NO:849, SEQ ID NO:851, SEQ ID NO:853, SEQ ID NO:855, SEQ ID NO:857, SEQ ID NO:859, SEQ ID NO:861, SEQ ID NO:863, SEQ ID NO:865, SEQ ID NO:867, SEQ ID NO:869, SEQ ID NO:871, SEQ ID NO:873, SEQ ID NO:875, SEQ ID NO:877, SEQ ID NO:879, SEQ ID NO:881, SEQ ID NO:883, SEQ ID NO:885, SEQ ID NO:887, SEQ ID NO:889, SEQ ID NO:891, SEQ ID NO:893, SEQ ID NO:895, SEQ ID NO:897, SEQ ID NO:899, SEQ ID NO:901, SEQ ID NO:903, SEQ ID NO:905, SEQ ID NO:907, SEQ ID NO:909, SEQ ID NO:911, SEQ ID NO:913, SEQ ID NO:915, SEQ ID NO:917, SEQ ID NO:919, SEQ ID NO:921, SEQ ID NO:923, SEQ ID NO:925, SEQ ID NO:927, SEQ ID NO:929, SEQ ID NO:931, SEQ ID NO:933, SEQ ID NO:935, SEQ ID NO:937, SEQ ID NO:939, SEQ ID NO:941, SEQ ID NO:943, SEQ ID NO:945, SEQ ID NO:947, SEQ ID NO:949, SEQ ID NO:951, SEQ ID NO:953, SEQ ID NO:955, SEQ ID NO:957, SEQ ID NO:959, SEQ ID NO:961, SEQ ID NO:963, SEQ ID NO:965, SEQ ID NO:967, SEQ ID NO:969, SEQ ID NO:971, SEQ ID NO:973, and/or SEQ ID NO:975;
wherein the nucleic acid encodes at least one polypeptide having a transferase activity, e.g., a transaminase activity, e.g., a d-amino-acid transferase activity or a ω-transaminase activity, and/or an oxidoreductase activity, e.g., a dehydrogenase activity, e.g., a d-amino-acid dehydrogenase activity, or encodes a polypeptide or peptide capable of generating a transferase specific antibody, e.g., a transaminase, e.g., a d-amino-acid transferase, and/or an oxidoreductase, e.g., a dehydrogenase, e.g., a d-amino-acid dehydrogenase specific antibody (a polypeptide or peptide that acts as an epitope or immunogen),
(b) the nucleic acid (polynucleotide) of (a), wherein the sequence identities are determined: (A) by analysis with a sequence comparison algorithm or by a visual inspection, or (B) over a region of at least about 20, 30, 40, 50, 75, 100, 150, 200, 250, 300, 350, 400, 450, 500, 550, 600, 650, 700, 750, 800, 850, 900, 950, 1000, 1050, 1100, 1150 or more residues, or over the full length of a cDNA, transcript (mRNA) or gene;
(c) the nucleic acid (polynucleotide) of (a) or (b), wherein the sequence comparison algorithm is a BLAST version 2.2.2 algorithm where a filtering setting is set to blastall -p blastp -d “nr pataa” -F F, and all other options are set to default;
(d) a nucleic acid (polynucleotide) encoding at least one polypeptide or peptide, wherein the nucleic acid comprises a sequence that hybridizes under stringent conditions to a nucleic acid comprising the sequence of SEQ ID NO:1, SEQ ID NO:3, SEQ ID NO:5, SEQ ID NO:7, SEQ ID NO:9, SEQ ID NO:11, SEQ ID NO:13, SEQ ID NO:15, SEQ ID NO:17, SEQ ID NO:19, SEQ ID NO:21, SEQ ID NO:23, SEQ ID NO:25, SEQ ID NO:27, SEQ ID NO:29, SEQ ID NO:31, SEQ ID NO:33, SEQ ID NO:35, SEQ ID NO:37, SEQ ID NO:39, SEQ ID NO:41, SEQ ID NO:43, SEQ ID NO:45, SEQ ID NO:47, SEQ ID NO:49, SEQ ID NO:51, SEQ ID NO:53, SEQ ID NO:55, SEQ ID NO:57, SEQ ID NO:59, SEQ ID NO:61, SEQ ID NO:63, SEQ ID NO:65, SEQ ID NO:67, SEQ ID NO:69, SEQ ID NO:71, SEQ ID NO:73, SEQ ID NO:75, SEQ ID NO:77, SEQ ID NO:79, SEQ ID NO:81, SEQ ID NO:83, SEQ ID NO:85, SEQ ID NO:87, SEQ ID NO:89, SEQ ID NO:91, SEQ ID NO:93, SEQ ID NO:95, SEQ ID NO:97, SEQ ID NO:99, SEQ ID NO:101, SEQ ID NO:103, SEQ ID NO:105, SEQ ID NO:107, SEQ ID NO:109, SEQ ID NO:111, SEQ ID NO:113, SEQ ID NO:115, SEQ ID NO:117, SEQ ID NO:119, SEQ ID NO:121, SEQ ID NO:123, SEQ ID NO:125, SEQ ID NO:127, SEQ ID NO:129, SEQ ID NO:131, SEQ ID NO:133, SEQ ID NO:135, SEQ ID NO:137, SEQ ID NO:139, SEQ ID NO:141, SEQ ID NO:143, SEQ ID NO:145, SEQ ID NO:147, SEQ ID NO:149, SEQ ID NO:151, SEQ ID NO:153, SEQ ID NO:155, SEQ ID NO:157, SEQ ID NO:159, SEQ ID NO:161, SEQ ID NO:163, SEQ ID NO:165, SEQ ID NO:167, SEQ ID NO:169, SEQ ID NO:171, SEQ ID NO:173, SEQ ID NO:175, SEQ ID NO:177, SEQ ID NO:179, SEQ ID NO:181, SEQ ID NO:183, SEQ ID NO:185, SEQ ID NO:187, SEQ ID NO:189, SEQ ID NO:191, SEQ ID NO:193, SEQ ID NO:195, SEQ ID NO:197, SEQ ID NO:199, SEQ ID NO:201, SEQ ID NO:203, SEQ ID NO:205, SEQ ID NO:207, SEQ ID NO:209, SEQ ID NO:211, SEQ ID NO:213, SEQ ID NO:215, SEQ ID NO:217, SEQ ID NO:219, SEQ ID NO:221, SEQ ID NO:223, SEQ ID NO:225, SEQ ID NO:227, SEQ ID NO:229, SEQ ID NO:231, SEQ ID NO:233, SEQ ID NO:235, SEQ ID NO:237, SEQ ID NO:239, SEQ ID NO:241, SEQ ID NO:243, SEQ ID NO:245, SEQ ID NO:247, SEQ ID NO:249, SEQ ID NO:251, SEQ ID NO:253, SEQ ID NO:255, SEQ ID NO:257, SEQ ID NO:259, SEQ ID NO:261, SEQ ID NO:263, SEQ ID NO:265, SEQ ID NO:267, SEQ ID NO:269, SEQ ID NO:271, SEQ ID NO:273, SEQ ID NO:275, SEQ ID NO:277, SEQ ID NO:279, SEQ ID NO:281, SEQ ID NO:283, SEQ ID NO:285, SEQ ID NO:287, SEQ ID NO:289, SEQ ID NO:291, SEQ ID NO:293, SEQ ID NO:295, SEQ ID NO:297, SEQ ID NO:299, SEQ ID NO:301, SEQ ID NO:303, SEQ ID NO:305, SEQ ID NO:307, SEQ ID NO:309, SEQ ID NO:311, SEQ ID NO:313, SEQ ID NO:315, SEQ ID NO:317, SEQ ID NO:319, SEQ ID NO:321, SEQ ID NO:323, SEQ ID NO:325, SEQ ID NO:327, SEQ ID NO:329, SEQ ID NO:331, SEQ ID NO:333, SEQ ID NO:335, SEQ ID NO:337, SEQ ID NO:339, SEQ ID NO:341, SEQ ID NO:343, SEQ ID NO:345, SEQ ID NO:347, SEQ ID NO:349, SEQ ID NO:351, SEQ ID NO:353, SEQ ID NO:355, SEQ ID NO:357, SEQ ID NO:359, SEQ ID NO:361, SEQ ID NO:363, SEQ ID NO:365, SEQ ID NO:367, SEQ ID NO:369, SEQ ID NO:371, SEQ ID NO:373, SEQ ID NO:375, SEQ ID NO:377, SEQ ID NO:379, SEQ ID NO:381, SEQ ID NO:383, SEQ ID NO:385, SEQ ID NO:387, SEQ ID NO:389, SEQ ID NO:391, SEQ ID NO:393, SEQ ID NO:395, SEQ ID NO:397, SEQ ID NO:399, SEQ ID NO:401, SEQ ID NO:403, SEQ ID NO:405, SEQ ID NO:407, SEQ ID NO:409, SEQ ID NO:411, SEQ ID NO:413, SEQ ID NO:415, SEQ ID NO:417, SEQ ID NO:419, SEQ ID NO:421, SEQ ID NO:423, SEQ ID NO:425, SEQ ID NO:427, SEQ ID NO:429, SEQ ID NO:431, SEQ ID NO:433, SEQ ID NO:435, SEQ ID NO:437, SEQ ID NO:439, SEQ ID NO:441, SEQ ID NO:443, SEQ ID NO:445, SEQ ID NO:447, SEQ ID NO:449, SEQ ID NO:451, SEQ ID NO:453, SEQ ID NO:455, SEQ ID NO:457, SEQ ID NO:459, SEQ ID NO:461, SEQ ID NO:463, SEQ ID NO:465, SEQ ID NO:467, SEQ ID NO:469, SEQ ID NO:471, SEQ ID NO:473, SEQ ID NO:475, SEQ ID NO:477, SEQ ID NO:479, SEQ ID NO:481, SEQ ID NO:483, SEQ ID NO:485, SEQ ID NO:487, SEQ ID NO:489, SEQ ID NO:491, SEQ ID NO:493, SEQ ID NO:495, SEQ ID NO:497, SEQ ID NO:499, SEQ ID NO:501, SEQ ID NO:503, SEQ ID NO:505, SEQ ID NO:507, SEQ ID NO:509, SEQ ID NO:511, SEQ ID NO:513, SEQ ID NO:515, SEQ ID NO:517, SEQ ID NO:519, SEQ ID NO:521, SEQ ID NO:523, SEQ ID NO:525, SEQ ID NO:527, SEQ ID NO:529, SEQ ID NO:531, SEQ ID NO:533, SEQ ID NO:535, SEQ ID NO:537, SEQ ID NO:539, SEQ ID NO:541, SEQ ID NO:543, SEQ ID NO:545, SEQ ID NO:547, SEQ ID NO:549, SEQ ID NO:551, SEQ ID NO:553, SEQ ID NO:555, SEQ ID NO:557, SEQ ID NO:559, SEQ ID NO:561, SEQ ID NO:563, SEQ ID NO:565, SEQ ID NO:567, SEQ ID NO:569, SEQ ID NO:571, SEQ ID NO:573, SEQ ID NO:575, SEQ ID NO:577, SEQ ID NO:579, SEQ ID NO:581, SEQ ID NO:583, SEQ ID NO:585, SEQ ID NO:587, SEQ ID NO:589, SEQ ID NO:591, SEQ ID NO:593, SEQ ID NO:595, SEQ ID NO:597, SEQ ID NO:599, SEQ ID NO:601, SEQ ID NO:603, SEQ ID NO:605, SEQ ID NO:607, SEQ ID NO:609, SEQ ID NO:611, SEQ ID NO:613, SEQ ID NO:615, SEQ ID NO:617, SEQ ID NO:619, SEQ ID NO:621, SEQ ID NO:623, SEQ ID NO:625, SEQ ID NO:627, SEQ ID NO:629, SEQ ID NO:631, SEQ ID NO:633, SEQ ID NO:635, SEQ ID NO:637, SEQ ID NO:639, SEQ ID NO:641, SEQ ID NO:643, SEQ ID NO:645, SEQ ID NO:647, SEQ ID NO:649, SEQ ID NO:651, SEQ ID NO:653, SEQ ID NO:655, SEQ ID NO:657, SEQ ID NO:659, SEQ ID NO:661, SEQ ID NO:663, SEQ ID NO:665, SEQ ID NO:667, SEQ ID NO:669, SEQ ID NO:671, SEQ ID NO:673, SEQ ID NO:675, SEQ ID NO:677, SEQ ID NO:679, SEQ ID NO:681, SEQ ID NO:683, SEQ ID NO:685, SEQ ID NO:687, SEQ ID NO:689, SEQ ID NO:691, SEQ ID NO:693, SEQ ID NO:695, SEQ ID NO:697, SEQ ID NO:699, SEQ ID NO:701, SEQ ID NO:703, SEQ ID NO:705, SEQ ID NO:707, SEQ ID NO:709, SEQ ID NO:711, SEQ ID NO:713, SEQ ID NO:715, SEQ ID NO:717, SEQ ID NO:719, SEQ ID NO:721, SEQ ID NO:723, SEQ ID NO:725, SEQ ID NO:727, SEQ ID NO:729, SEQ ID NO:731, SEQ ID NO:733, SEQ ID NO:735, SEQ ID NO:737, SEQ ID NO:739, SEQ ID NO:741, SEQ ID NO:743, SEQ ID NO:745, SEQ ID NO:747, SEQ ID NO:749, SEQ ID NO:751, SEQ ID NO:753, SEQ ID NO:755, SEQ ID NO:757, SEQ ID NO:759, SEQ ID NO:761, SEQ ID NO:763, SEQ ID NO:765, SEQ ID NO:767, SEQ ID NO:769, SEQ ID NO:771, SEQ ID NO:773, SEQ ID NO:775, SEQ ID NO:777, SEQ ID NO:779, SEQ ID NO:781, SEQ ID NO:783, SEQ ID NO:785, SEQ ID NO:787, SEQ ID NO:789, SEQ ID NO:791, SEQ ID NO:793, SEQ ID NO:795, SEQ ID NO:797, SEQ ID NO:799, SEQ ID NO:801, SEQ ID NO:803, SEQ ID NO:805, SEQ ID NO:807, SEQ ID NO:809, SEQ ID NO:811, SEQ ID NO:813, SEQ ID NO:815, SEQ ID NO:817, SEQ ID NO:819, SEQ ID NO:821, SEQ ID NO:823, SEQ ID NO:825, SEQ ID NO:827, SEQ ID NO:829, SEQ ID NO:831, SEQ ID NO:833, SEQ ID NO:835, SEQ ID NO:837, SEQ ID NO:839, SEQ ID NO:841, SEQ ID NO:843, SEQ ID NO:845, SEQ ID NO:847, SEQ ID NO:849, SEQ ID NO:851, SEQ ID NO:853, SEQ ID NO:855, SEQ ID NO:857, SEQ ID NO:859, SEQ ID NO:861, SEQ ID NO:863, SEQ ID NO:865, SEQ ID NO:867, SEQ ID NO:869, SEQ ID NO:871, SEQ ID NO:873, SEQ ID NO:875, SEQ ID NO:877, SEQ ID NO:879, SEQ ID NO:881, SEQ ID NO:883, SEQ ID NO:885, SEQ ID NO:887, SEQ ID NO:889, SEQ ID NO:891, SEQ ID NO:893, SEQ ID NO:895, SEQ ID NO:897, SEQ ID NO:899, SEQ ID NO:901, SEQ ID NO:903, SEQ ID NO:905, SEQ ID NO:907, SEQ ID NO:909, SEQ ID NO:911, SEQ ID NO:913, SEQ ID NO:915, SEQ ID NO:917, SEQ ID NO:919, SEQ ID NO:921, SEQ ID NO:923, SEQ ID NO:925, SEQ ID NO:927, SEQ ID NO:929, SEQ ID NO:931, SEQ ID NO:933, SEQ ID NO:935, SEQ ID NO:937, SEQ ID NO:939, SEQ ID NO:941, SEQ ID NO:943, SEQ ID NO:945, SEQ ID NO:947, SEQ ID NO:949, SEQ ID NO:951, SEQ ID NO:953, SEQ ID NO:955, SEQ ID NO:957, SEQ ID NO:959, SEQ ID NO:961, SEQ ID NO:963, SEQ ID NO:965, SEQ ID NO:967, SEQ ID NO:969, SEQ ID NO:971, SEQ ID NO:973, and/or SEQ ID NO:975,
and the stringent conditions comprise a wash step comprising a wash in 0.2×SSC at a temperature of about 65° C. for about 15 minutes;
(e) the nucleic acid (polynucleotide) of any of (a) to (d) having a length of at least about 20, 25, 30, 50, 75, 100, 125, 150, 175, 200, 225, 300, 350, 400, 450, 500, 550, 600, 650, 700, 750, 800, 850, 900, 950, 1000, 1050, 1100, 1150 or more nucleotide residues, or the full length of a gene or a transcript;
(f) a nucleic acid (polynucleotide) encoding at least one polypeptide having a transferase activity, e.g., a transaminase activity, e.g., a d-amino-acid transferase activity or a transaminase activity, and/or an oxidoreductase activity, e.g., a dehydrogenase activity, e.g., a d-amino-acid dehydrogenase activity, wherein the polypeptide comprises the sequence of SEQ ID NO:2, SEQ ID NO:4, SEQ ID NO:6, SEQ ID NO:8, SEQ ID NO:10, SEQ ID NO:12, SEQ ID NO:14, SEQ ID NO:16, SEQ ID NO:18, SEQ ID NO:20, SEQ ID NO:22, SEQ ID NO:24, SEQ ID NO:26, SEQ ID NO:28, SEQ ID NO:30, SEQ ID NO:32, SEQ ID NO:34, SEQ ID NO:36, SEQ ID NO:38, SEQ ID NO:40, SEQ ID NO:42, SEQ ID NO:44, SEQ ID NO:46, SEQ ID NO:48, SEQ ID NO:50, SEQ ID NO:52, SEQ ID NO:54, SEQ ID NO:56, SEQ ID NO:58, SEQ ID NO:60, SEQ ID NO:62, SEQ ID NO:64, SEQ ID NO:66, SEQ ID NO:68, SEQ ID NO:70, SEQ ID NO:72, SEQ ID NO:74, SEQ ID NO:76, SEQ ID NO:78, SEQ ID NO:80, SEQ ID NO:82, SEQ ID NO:84, SEQ ID NO:86, SEQ ID NO:88, SEQ ID NO:90, SEQ ID NO:92, SEQ ID NO:94, SEQ ID NO:96, SEQ ID NO:98, SEQ ID NO:100, SEQ ID NO:102, SEQ ID NO:104, SEQ ID NO:106, SEQ ID NO:108, SEQ ID NO:110, SEQ ID NO:112, SEQ ID NO:114, SEQ ID NO:116, SEQ ID NO:118, SEQ ID NO:120, SEQ ID NO:122, SEQ ID NO:124, SEQ ID NO:126, SEQ ID NO:128, SEQ ID NO:130, SEQ ID NO:132, SEQ ID NO:134, SEQ ID NO:136, SEQ ID NO:138, SEQ ID NO:140, SEQ ID NO:142, SEQ ID NO:143, SEQ ID NO:146, SEQ ID NO:148, SEQ ID NO:150, SEQ ID NO:152, SEQ ID NO:154, SEQ ID NO:156, SEQ ID NO:158, SEQ ID NO:160, SEQ ID NO:162, SEQ ID NO:164, SEQ ID NO:166, SEQ ID NO:168, SEQ ID NO:170, SEQ ID NO:172, SEQ ID NO:174, SEQ ID NO:176, SEQ ID NO:178, SEQ ID NO:180, SEQ ID NO:182, SEQ ID NO:184, SEQ ID NO:186, SEQ ID NO:188, SEQ ID NO:190, SEQ ID NO:192, SEQ ID NO:194, SEQ ID NO:196, SEQ ID NO:198, SEQ ID NO:200, SEQ ID NO:202, SEQ ID NO:204, SEQ ID NO:206, SEQ ID NO:208, SEQ ID NO:210, SEQ ID NO:212, SEQ ID NO:214, SEQ ID NO:216, SEQ ID NO:218, SEQ ID NO:220, SEQ ID NO:220 with one, several or all of the modifications of Table 46 or Table 55, SEQ ID NO:222, SEQ ID NO:224, SEQ ID NO:226, SEQ ID NO:228, SEQ ID NO:230, SEQ ID NO:232, SEQ ID NO:234, SEQ ID NO:236, SEQ ID NO:238, SEQ ID NO:240, SEQ ID NO:242, SEQ ID NO:244, SEQ ID NO:246, SEQ ID NO:248, SEQ ID NO:250, SEQ ID NO:252, SEQ ID NO:254, SEQ ID NO:256, SEQ ID NO:258, SEQ ID NO:260, SEQ ID NO:262, SEQ ID NO:264, SEQ ID NO:266, SEQ ID NO:268, SEQ ID NO:270, SEQ ID NO:272, SEQ ID NO:274, SEQ ID NO:276, SEQ ID NO:278, SEQ ID NO:280, SEQ ID NO:282, SEQ ID NO:284, SEQ ID NO:286, SEQ ID NO:288, SEQ ID NO:290, SEQ ID NO:292, SEQ ID NO:294, SEQ ID NO:296, SEQ ID NO:298, SEQ ID NO:300, SEQ ID NO:302, SEQ ID NO:304, SEQ ID NO:306, SEQ ID NO:308, SEQ ID NO:310, SEQ ID NO:312, SEQ ID NO:314, SEQ ID NO:316, SEQ ID NO:318, SEQ ID NO:320, SEQ ID NO:322, SEQ ID NO:324, SEQ ID NO:326, SEQ ID NO:328, SEQ ID NO:330, SEQ ID NO:332, SEQ ID NO:334, SEQ ID NO:336, SEQ ID NO:338, SEQ ID NO:340, SEQ ID NO:342, SEQ ID NO:344, SEQ ID NO:346, SEQ ID NO:348, SEQ ID NO:350, SEQ ID NO:352, SEQ ID NO:354, SEQ ID NO:356, SEQ ID NO:358, SEQ ID NO:360, SEQ ID NO:362, SEQ ID NO:364, SEQ ID NO:366, SEQ ID NO:368, SEQ ID NO:370, SEQ ID NO:372, SEQ ID NO:374, SEQ ID NO:376, SEQ ID NO:378, SEQ ID NO:380, SEQ ID NO:382, SEQ ID NO:384, SEQ ID NO:386, SEQ ID NO:388, SEQ ID NO:390, SEQ ID NO:392, SEQ ID NO:394, SEQ ID NO:396, SEQ ID NO:398, SEQ ID NO:400, SEQ ID NO:402, SEQ ID NO:404, SEQ ID NO:406, SEQ ID NO:408, SEQ ID NO:410, SEQ ID NO:412, SEQ ID NO:414, SEQ ID NO:416, SEQ ID NO:418, SEQ ID NO:420, SEQ ID NO:422, SEQ ID NO:424, SEQ ID NO:426, SEQ ID NO:428, SEQ ID NO:430, SEQ ID NO:432, SEQ ID NO:434, SEQ ID NO:436, SEQ ID NO:438, SEQ ID NO:440, SEQ ID NO:442, SEQ ID NO:444, SEQ ID NO:446, SEQ ID NO:448, SEQ ID NO:450, SEQ ID NO:452, SEQ ID NO:454, SEQ ID NO:456, SEQ ID NO:458, SEQ ID NO:460, SEQ ID NO:462, SEQ ID NO:464, SEQ ID NO:466, SEQ ID NO:468, SEQ ID NO:470, SEQ ID NO:472, SEQ ID NO:474, SEQ ID NO:476, SEQ ID NO:478, SEQ ID NO:480, SEQ ID NO:482, SEQ ID NO:484, SEQ ID NO:486, SEQ ID NO:488, SEQ ID NO:490, SEQ ID NO:492, SEQ ID NO:494, SEQ ID NO:496, SEQ ID NO:498, SEQ ID NO:500, SEQ ID NO:502, SEQ ID NO:504, SEQ ID NO:506, SEQ ID NO:508, SEQ ID NO:510, SEQ ID NO:512, SEQ ID NO:514, SEQ ID NO:516, SEQ ID NO:518, SEQ ID NO:520, SEQ ID NO:522, SEQ ID NO:524, SEQ ID NO:526, SEQ ID NO:528, SEQ ID NO:530, SEQ ID NO:532, SEQ ID NO:534, SEQ ID NO:536, SEQ ID NO:538, SEQ ID NO:540, SEQ ID NO:542, SEQ ID NO:544, SEQ ID NO:546, SEQ ID NO:548, SEQ ID NO:550, SEQ ID NO:552, SEQ ID NO:554, SEQ ID NO:556, SEQ ID NO:558, SEQ ID NO:560, SEQ ID NO:562, SEQ ID NO:564, SEQ ID NO:566, SEQ ID NO:568, SEQ ID NO:570, SEQ ID NO:572, SEQ ID NO:574, SEQ ID NO:576, SEQ ID NO:578, SEQ ID NO:580, SEQ ID NO:582, SEQ ID NO:584, SEQ ID NO:586, SEQ ID NO:588, SEQ ID NO:590, SEQ ID NO:592, SEQ ID NO:594, SEQ ID NO:596, SEQ ID NO:598, SEQ ID NO:600, SEQ ID NO:602, SEQ ID NO:604, SEQ ID NO:606, SEQ ID NO:608, SEQ ID NO:610, SEQ ID NO:612, SEQ ID NO:614, SEQ ID NO:616, SEQ ID NO:618, SEQ ID NO:620, SEQ ID NO:622, SEQ ID NO:624, SEQ ID NO:626, SEQ ID NO:628, SEQ ID NO:630, SEQ ID NO:632, SEQ ID NO:634, SEQ ID NO:636, SEQ ID NO:638, SEQ ID NO:640, SEQ ID NO:642, SEQ ID NO:644, SEQ ID NO:646, SEQ ID NO:648, SEQ ID NO:650, SEQ ID NO:652, SEQ ID NO:654, SEQ ID NO:656, SEQ ID NO:658, SEQ ID NO:660, SEQ ID NO:662, SEQ ID NO:664, SEQ ID NO:666, SEQ ID NO:668, SEQ ID NO:670, SEQ ID NO:672, SEQ ID NO:674, SEQ ID NO:676, SEQ ID NO:678, SEQ ID NO:680, SEQ ID NO:682, SEQ ID NO:684, SEQ ID NO:686, SEQ ID NO:688, SEQ ID NO:690, SEQ ID NO:692, SEQ ID NO:694, SEQ ID NO:696, SEQ ID NO:698, SEQ ID NO:700, SEQ ID NO:702, SEQ ID NO:704, SEQ ID NO:706, SEQ ID NO:708, SEQ ID NO:710, SEQ ID NO:712, SEQ ID NO:714, SEQ ID NO:716, SEQ ID NO:718, SEQ ID NO:720, SEQ ID NO:722, SEQ ID NO:724, SEQ ID NO:726, SEQ ID NO:728, SEQ ID NO:730, SEQ ID NO:732, SEQ ID NO:734, SEQ ID NO:736, SEQ ID NO:738, SEQ ID NO:740, SEQ ID NO:742, SEQ ID NO:744, SEQ ID NO:746, SEQ ID NO:748, SEQ ID NO:750, SEQ ID NO:752, SEQ ID NO:754, SEQ ID NO:756, SEQ ID NO:758, SEQ ID NO:760, SEQ ID NO:762, SEQ ID NO:764, SEQ ID NO:766, SEQ ID NO:768, SEQ ID NO:770, SEQ ID NO:772, SEQ ID NO:774, SEQ ID NO:776, SEQ ID NO:778, SEQ ID NO:780, SEQ ID NO:782, SEQ ID NO:784, SEQ ID NO:786, SEQ ID NO:788, SEQ ID NO:790, SEQ ID NO:792, SEQ ID NO:794, SEQ ID NO:796, SEQ ID NO:798, SEQ ID NO:800, SEQ ID NO:802, SEQ ID NO:804, SEQ ID NO:808, SEQ ID NO:808, SEQ ID NO:810, SEQ ID NO:812, SEQ ID NO:814, SEQ ID NO:816, SEQ ID NO:818, SEQ ID NO:820, SEQ ID NO:822, SEQ ID NO:824, SEQ ID NO:826, SEQ ID NO:828, SEQ ID NO:830, SEQ ID NO:832, SEQ ID NO:834, SEQ ID NO:836, SEQ ID NO:838, SEQ ID NO:840, SEQ ID NO:842, SEQ ID NO:844, SEQ ID NO:846, SEQ ID NO:848, SEQ ID NO:850, SEQ ID NO:852, SEQ ID NO:854, SEQ ID NO:856, SEQ ID NO:858, SEQ ID NO:860, SEQ ID NO:862, SEQ ID NO:864, SEQ ID NO:866, SEQ ID NO:868, SEQ ID NO:870, SEQ ID NO:872, SEQ ID NO:874, SEQ ID NO:876, SEQ ID NO:878, SEQ ID NO:880, SEQ ID NO:882, SEQ ID NO:884, SEQ ID NO:886, SEQ ID NO:888, SEQ ID NO:890, SEQ ID NO:892, SEQ ID NO:894, SEQ ID NO:896, SEQ ID NO:898, SEQ ID NO:900, SEQ ID NO:902, SEQ ID NO:904, SEQ ID NO:906, SEQ ID NO:908, SEQ ID NO:910, SEQ ID NO:912, SEQ ID NO:914, SEQ ID NO:916, SEQ ID NO:918, SEQ ID NO:920, SEQ ID NO:922, SEQ ID NO:924, SEQ ID NO:926, SEQ ID NO:928, SEQ ID NO:930, SEQ ID NO:932, SEQ ID NO:934, SEQ ID NO:936, SEQ ID NO:938, SEQ ID NO:940, SEQ ID NO:942, SEQ ID NO:944, SEQ ID NO:946, SEQ ID NO:948, SEQ ID NO:950, SEQ ID NO:952, SEQ ID NO:954, SEQ ID NO:956, SEQ ID NO:958, SEQ ID NO:960, SEQ ID NO:962, SEQ ID NO:964, SEQ ID NO:966, SEQ ID NO:968, SEQ ID NO:970, SEQ ID NO:972, SEQ ID NO:974 and/or SEQ ID NO:976, or enzymatically active fragments thereof;
(g) the nucleic acid (polynucleotide) of any of (a) to (f) and encoding a polypeptide having at least one conservative amino acid substitution and retaining its transferase activity, e.g., transaminase activity, e.g., d-amino-acid transferase activity, and/or oxidoreductase activity, e.g., dehydrogenase activity, e.g., d-amino-acid dehydrogenase activity, wherein the at least one conservative amino acid substitution comprises substituting an amino acid with another amino acid of like characteristics; or, a conservative substitution comprises: replacement of an aliphatic amino acid with another aliphatic amino acid; replacement of a Serine with a Threonine or vice versa; replacement of an acidic residue with another acidic residue; replacement of a residue bearing an amide group with another residue bearing an amide group; exchange of a basic residue with another basic residue; or replacement of an aromatic residue with another aromatic residue;
(h) the nucleic acid (polynucleotide) of any of (a) to (g) encoding a polypeptide having a transferase activity, e.g., a transaminase activity, e.g., a d-amino-acid transferase activity or a transaminase activity, and/or an oxidoreductase activity, e.g., a dehydrogenase activity, e.g., a d-amino-acid dehydrogenase activity but lacking a signal sequence, a prepro domain, a binding domain, and/or other domain;
(i) the nucleic acid (polynucleotide) of (h), wherein the binding domain comprises, or consists of, a NAD, a NAD(P), a calcium, a thiamine, a FAD, a zinc, a DNA and/or a lipoyl binding domain;
(j) the nucleic acid (polynucleotide) of any of (a) to (i) encoding a polypeptide having a transferase activity, e.g., a transaminase activity, e.g., a d-amino-acid transferase activity or a ω-transaminase activity, and/or an oxidoreductase activity, e.g., a dehydrogenase activity, e.g., a d-amino-acid dehydrogenase activity further comprising a heterologous sequence;
(k) the nucleic acid (polynucleotide) of (j), wherein the heterologous sequence comprises, or consists of a sequence encoding: (A) a heterologous signal sequence, a heterologous domain, a heterologous binding domain, a heterologous dockerin domain, a heterologous catalytic domain (CD), or a combination thereof; (B) the sequence of (l), wherein the heterologous signal sequence, binding domain or catalytic domain (CD) is derived from a heterologous enzyme; or, (C) a tag, an epitope, a targeting peptide, a cleavable sequence, a detectable moiety or an enzyme;
(l) the nucleic acid (polynucleotide) of (k), wherein the heterologous binding domain comprises, or consists of, a NAD, a NAD(P), a calcium, a thiamine, a FAD, a zinc, a DNA and/or a lipoyl binding domain;
(m) the nucleic acid (polynucleotide) of (l), wherein the heterologous signal sequence targets the encoded protein to a vacuole, the endoplasmic reticulum, a chloroplast or a starch granule; or
(n) a nucleic acid sequence (polynucleotide) fully (completely) complementary to the sequence of any of (a) to (m).
The invention provides isolated, synthetic or recombinant nucleic acids comprising a nucleic acid encoding at least one polypeptide having a transferase activity, e.g., a transaminase activity, e.g., a d-amino-acid transferase activity or a ω-transaminase activity, and/or an oxidoreductase activity, e.g., a dehydrogenase activity, e.g., a d-amino-acid dehydrogenase activity, wherein the polypeptide has a sequence as set forth in SEQ ID NO:2, SEQ ID NO:4, SEQ ID NO:6, SEQ ID NO:8, SEQ ID NO:10, SEQ ID NO:12, SEQ ID NO:14, SEQ ID NO:16, SEQ ID NO:18, SEQ ID NO:20, SEQ ID NO:22, SEQ ID NO:24, SEQ ID NO:26, SEQ ID NO:28, SEQ ID NO:30, SEQ ID NO:32, SEQ ID NO:34, SEQ ID NO:36, SEQ ID NO:38, SEQ ID NO:40, SEQ ID NO:42, SEQ ID NO:44, SEQ ID NO:46, SEQ ID NO:48, SEQ ID NO:50, SEQ ID NO:52, SEQ ID NO:54, SEQ ID NO:56, SEQ ID NO:58, SEQ ID NO:60, SEQ ID NO:62, SEQ ID NO:64, SEQ ID NO:66, SEQ ID NO:68, SEQ ID NO:70, SEQ ID NO:72, SEQ ID NO:74, SEQ ID NO:76, SEQ ID NO:78, SEQ ID NO:80, SEQ ID NO:82, SEQ ID NO:84, SEQ ID NO:86, SEQ ID NO:88, SEQ ID NO:90, SEQ ID NO:92, SEQ ID NO:94, SEQ ID NO:96, SEQ ID NO:98, SEQ ID NO:100, SEQ ID NO:102, SEQ ID NO:104, SEQ ID NO:106, SEQ ID NO:108, SEQ ID NO:110, SEQ ID NO:112, SEQ ID NO:114, SEQ ID NO:116, SEQ ID NO:118, SEQ ID NO:120, SEQ ID NO:122, SEQ ID NO:124, SEQ ID NO:126, SEQ ID NO:128, SEQ ID NO:130, SEQ ID NO:132, SEQ ID NO:134, SEQ ID NO:136, SEQ ID NO:138, SEQ ID NO:140, SEQ ID NO:142, SEQ ID NO:143, SEQ ID NO:146, SEQ ID NO:148, SEQ ID NO:150, SEQ ID NO:152, SEQ ID NO:154, SEQ ID NO:156, SEQ ID NO:158, SEQ ID NO:160, SEQ ID NO:162, SEQ ID NO:164, SEQ ID NO:166, SEQ ID NO:168, SEQ ID NO:170, SEQ ID NO:172, SEQ ID NO:174, SEQ ID NO:176, SEQ ID NO:178, SEQ ID NO:180, SEQ ID NO:182, SEQ ID NO:184, SEQ ID NO:186, SEQ ID NO:188, SEQ ID NO:190, SEQ ID NO:192, SEQ ID NO:194, SEQ ID NO:196, SEQ ID NO:198, SEQ ID NO:200, SEQ ID NO:202, SEQ ID NO:204, SEQ ID NO:206, SEQ ID NO:208, SEQ ID NO:210, SEQ ID NO:212, SEQ ID NO:214, SEQ ID NO:216, SEQ ID NO:218, SEQ ID NO:220, SEQ ID NO:220 with one, several or all of the modifications of Table 46 or Table 55, SEQ ID NO:222, SEQ ID NO:224, SEQ ID NO:226, SEQ ID NO:228, SEQ ID NO:230, SEQ ID NO:232, SEQ ID NO:234, SEQ ID NO:236, SEQ ID NO:238, SEQ ID NO:240, SEQ ID NO:242, SEQ ID NO:244, SEQ ID NO:246, SEQ ID NO:248, SEQ ID NO:250, SEQ ID NO:252, SEQ ID NO:254, SEQ ID NO:256, SEQ ID NO:258, SEQ ID NO:260, SEQ ID NO:262, SEQ ID NO:264, SEQ ID NO:266, SEQ ID NO:268, SEQ ID NO:270, SEQ ID NO:272, SEQ ID NO:274, SEQ ID NO:276, SEQ ID NO:278, SEQ ID NO:280, SEQ ID NO:282, SEQ ID NO:284, SEQ ID NO:286, SEQ ID NO:288, SEQ ID NO:290, SEQ ID NO:292, SEQ ID NO:294, SEQ ID NO:296, SEQ ID NO:298, SEQ ID NO:300, SEQ ID NO:302, SEQ ID NO:304, SEQ ID NO:306, SEQ ID NO:308, SEQ ID NO:310, SEQ ID NO:312, SEQ ID NO:314, SEQ ID NO:316, SEQ ID NO:318, SEQ ID NO:320, SEQ ID NO:322, SEQ ID NO:324, SEQ ID NO:326, SEQ ID NO:328, SEQ ID NO:330, SEQ ID NO:332, SEQ ID NO:334, SEQ ID NO:336, SEQ ID NO:338, SEQ ID NO:340, SEQ ID NO:342, SEQ ID NO:344, SEQ ID NO:346, SEQ ID NO:348, SEQ ID NO:350, SEQ ID NO:352, SEQ ID NO:354, SEQ ID NO:356, SEQ ID NO:358, SEQ ID NO:360, SEQ ID NO:362, SEQ ID NO:364, SEQ ID NO:366, SEQ ID NO:368, SEQ ID NO:370, SEQ ID NO:372, SEQ ID NO:374, SEQ ID NO:376, SEQ ID NO:378, SEQ ID NO:380, SEQ ID NO:382, SEQ ID NO:384, SEQ ID NO:386, SEQ ID NO:388, SEQ ID NO:390, SEQ ID NO:392, SEQ ID NO:394, SEQ ID NO:396, SEQ ID NO:398, SEQ ID NO:400, SEQ ID NO:402, SEQ ID NO:404, SEQ ID NO:406, SEQ ID NO:408, SEQ ID NO:410, SEQ ID NO:412, SEQ ID NO:414, SEQ ID NO:416, SEQ ID NO:418, SEQ ID NO:420, SEQ ID NO:422, SEQ ID NO:424, SEQ ID NO:426, SEQ ID NO:428, SEQ ID NO:430, SEQ ID NO:432, SEQ ID NO:434, SEQ ID NO:436, SEQ ID NO:438, SEQ ID NO:440, SEQ ID NO:442, SEQ ID NO:444, SEQ ID NO:446, SEQ ID NO:448, SEQ ID NO:450, SEQ ID NO:452, SEQ ID NO:454, SEQ ID NO:456, SEQ ID NO:458, SEQ ID NO:460, SEQ ID NO:462, SEQ ID NO:464, SEQ ID NO:466, SEQ ID NO:468, SEQ ID NO:470, SEQ ID NO:472, SEQ ID NO:474, SEQ ID NO:476, SEQ ID NO:478, SEQ ID NO:480, SEQ ID NO:482, SEQ ID NO:484, SEQ ID NO:486, SEQ ID NO:488, SEQ ID NO:490, SEQ ID NO:492, SEQ ID NO:494, SEQ ID NO:496, SEQ ID NO:498, SEQ ID NO:500, SEQ ID NO:502, SEQ ID NO:504, SEQ ID NO:506, SEQ ID NO:508, SEQ ID NO:510, SEQ ID NO:512, SEQ ID NO:514, SEQ ID NO:516, SEQ ID NO:518, SEQ ID NO:520, SEQ ID NO:522, SEQ ID NO:524, SEQ ID NO:526, SEQ ID NO:528, SEQ ID NO:530, SEQ ID NO:532, SEQ ID NO:534, SEQ ID NO:536, SEQ ID NO:538, SEQ ID NO:540, SEQ ID NO:542, SEQ ID NO:544, SEQ ID NO:546, SEQ ID NO:548, SEQ ID NO:550, SEQ ID NO:552, SEQ ID NO:554, SEQ ID NO:556, SEQ ID NO:558, SEQ ID NO:560, SEQ ID NO:562, SEQ ID NO:564, SEQ ID NO:566, SEQ ID NO:568, SEQ ID NO:570, SEQ ID NO:572, SEQ ID NO:574, SEQ ID NO:576, SEQ ID NO:578, SEQ ID NO:580, SEQ ID NO:582, SEQ ID NO:584, SEQ ID NO:586, SEQ ID NO:588, SEQ ID NO:590, SEQ ID NO:592, SEQ ID NO:594, SEQ ID NO:596, SEQ ID NO:598, SEQ ID NO:600, SEQ ID NO:602, SEQ ID NO:604, SEQ ID NO:606, SEQ ID NO:608, SEQ ID NO:610, SEQ ID NO:612, SEQ ID NO:614, SEQ ID NO:616, SEQ ID NO:618, SEQ ID NO:620, SEQ ID NO:622, SEQ ID NO:624, SEQ ID NO:626, SEQ ID NO:628, SEQ ID NO:630, SEQ ID NO:632, SEQ ID NO:634, SEQ ID NO:636, SEQ ID NO:638, SEQ ID NO:640, SEQ ID NO:642, SEQ ID NO:644, SEQ ID NO:646, SEQ ID NO:648, SEQ ID NO:650, SEQ ID NO:652, SEQ ID NO:654, SEQ ID NO:656, SEQ ID NO:658, SEQ ID NO:660, SEQ ID NO:662, SEQ ID NO:664, SEQ ID NO:666, SEQ ID NO:668, SEQ ID NO:670, SEQ ID NO:672, SEQ ID NO:674, SEQ ID NO:676, SEQ ID NO:678, SEQ ID NO:680, SEQ ID NO:682, SEQ ID NO:684, SEQ ID NO:686, SEQ ID NO:688, SEQ ID NO:690, SEQ ID NO:692, SEQ ID NO:694, SEQ ID NO:696, SEQ ID NO:698, SEQ ID NO:700, SEQ ID NO:702, SEQ ID NO:704, SEQ ID NO:706, SEQ ID NO:708, SEQ ID NO:710, SEQ ID NO:712, SEQ ID NO:714, SEQ ID NO:716, SEQ ID NO:718, SEQ ID NO:720, SEQ ID NO:722, SEQ ID NO:724, SEQ ID NO:726, SEQ ID NO:728, SEQ ID NO:730, SEQ ID NO:732, SEQ ID NO:734, SEQ ID NO:736, SEQ ID NO:738, SEQ ID NO:740, SEQ ID NO:742, SEQ ID NO:744, SEQ ID NO:746, SEQ ID NO:748, SEQ ID NO:750, SEQ ID NO:752, SEQ ID NO:754, SEQ ID NO:756, SEQ ID NO:758, SEQ ID NO:760, SEQ ID NO:762, SEQ ID NO:764, SEQ ID NO:766, SEQ ID NO:768, SEQ ID NO:770, SEQ ID NO:772, SEQ ID NO:774, SEQ ID NO:776, SEQ ID NO:778, SEQ ID NO:780, SEQ ID NO:782, SEQ ID NO:784, SEQ ID NO:786, SEQ ID NO:788, SEQ ID NO:790, SEQ ID NO:792, SEQ ID NO:794, SEQ ID NO:796, SEQ ID NO:798, SEQ ID NO:800, SEQ ID NO:802, SEQ ID NO:804, SEQ ID NO:808, SEQ ID NO:808, SEQ ID NO:810, SEQ ID NO:812, SEQ ID NO:814, SEQ ID NO:816, SEQ ID NO:818, SEQ ID NO:820, SEQ ID NO:822, SEQ ID NO:824, SEQ ID NO:826, SEQ ID NO:828, SEQ ID NO:830, SEQ ID NO:832, SEQ ID NO:834, SEQ ID NO:836, SEQ ID NO:838, SEQ ID NO:840, SEQ ID NO:842, SEQ ID NO:844, SEQ ID NO:846, SEQ ID NO:848, SEQ ID NO:850, SEQ ID NO:852, SEQ ID NO:854, SEQ ID NO:856, SEQ ID NO:858, SEQ ID NO:860, SEQ ID NO:862, SEQ ID NO:864, SEQ ID NO:866, SEQ ID NO:868, SEQ ID NO:870, SEQ ID NO:872, SEQ ID NO:874, SEQ ID NO:876, SEQ ID NO:878, SEQ ID NO:880, SEQ ID NO:882, SEQ ID NO:884, SEQ ID NO:886, SEQ ID NO:888, SEQ ID NO:890, SEQ ID NO:892, SEQ ID NO:894, SEQ ID NO:896, SEQ ID NO:898, SEQ ID NO:900, SEQ ID NO:902, SEQ ID NO:904, SEQ ID NO:906, SEQ ID NO:908, SEQ ID NO:910, SEQ ID NO:912, SEQ ID NO:914, SEQ ID NO:916, SEQ ID NO:918, SEQ ID NO:920, SEQ ID NO:922, SEQ ID NO:924, SEQ ID NO:926, SEQ ID NO:928, SEQ ID NO:930, SEQ ID NO:932, SEQ ID NO:934, SEQ ID NO:936, SEQ ID NO:938, SEQ ID NO:940, SEQ ID NO:942, SEQ ID NO:944, SEQ ID NO:946, SEQ ID NO:948, SEQ ID NO:950, SEQ ID NO:952, SEQ ID NO:954, SEQ ID NO:956, SEQ ID NO:958, SEQ ID NO:960, SEQ ID NO:962, SEQ ID NO:964, SEQ ID NO:966, SEQ ID NO:968, SEQ ID NO:970, SEQ ID NO:972, SEQ ID NO:974 and/or SEQ ID NO:976, or enzymatically active fragments thereof, including the sequences described herein and in Tables 1, 2 and 3, and the Sequence Listing (all of these sequences are “exemplary enzymes/polypeptides of the invention”), and enzymatically active subsequences (fragments) thereof and/or immunologically active subsequences thereof (such as epitopes or immunogens) (all “peptides of the invention”) and variants thereof (all of these sequences encompassing polypeptide and peptide sequences of the invention) (or, hereinafter referred to as the exemplary polypeptide sequences of the inventions).
The invention provides isolated, synthetic or recombinant nucleic acids comprising sequences completely complementary to all of these nucleic acid sequences of the invention (complementary (non-coding) and coding sequences also hereinafter collectively referred to as nucleic acid sequences of the invention).
In one aspect, the sequence identity is at least about 51%, 52%, 53%, 54%, 55%, 56%, 57%, 58%, 59%, 60%, 61%, 62%, 63%, 64%, 65%, 66%, 67%, 68%, 69%, 70%, 71%, 72%, 73%, 74%, 75%, 76%, 77%, 78%, 79%, 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100% (complete) sequence identity (homology). In one aspect, the sequence identity is over a region of at least about 150, 175, 200, 225, 250, 275, 300, 350, 400, 450, 500, 550, 600, 650, 700, 750, 800, 850, 900, 950, 1000, 1050, 1100, 1150 or more residues, or the full length of a gene or a transcript. For example, the invention provides isolated, synthetic or recombinant nucleic acids comprising a nucleic acid sequence of SEQ ID NO:1, SEQ ID NO:3, SEQ ID NO:5, SEQ ID NO:7, SEQ ID NO:9, SEQ ID NO:11, SEQ ID NO:13, SEQ ID NO:15, SEQ ID NO:17, SEQ ID NO:19, SEQ ID NO:21, SEQ ID NO:23, SEQ ID NO:25, SEQ ID NO:27, SEQ ID NO:29, SEQ ID NO:31, SEQ ID NO:33, SEQ ID NO:35, SEQ ID NO:37, SEQ ID NO:39, SEQ ID NO:41, SEQ ID NO:43, SEQ ID NO:45, SEQ ID NO:47, SEQ ID NO:49, SEQ ID NO:51, SEQ ID NO:53, SEQ ID NO:55, SEQ ID NO:57, SEQ ID NO:59, SEQ ID NO:61, SEQ ID NO:63, SEQ ID NO:65, SEQ ID NO:67, SEQ ID NO:69, SEQ ID NO:71, SEQ ID NO:73, SEQ ID NO:75, SEQ ID NO:77, SEQ ID NO:79, SEQ ID NO:81, SEQ ID NO:83, SEQ ID NO:85, SEQ ID NO:87, SEQ ID NO:89, SEQ ID NO:91, SEQ ID NO:93, SEQ ID NO:95, SEQ ID NO:97, SEQ ID NO:99, SEQ ID NO:101, SEQ ID NO:103, SEQ ID NO:105, SEQ ID NO:107, SEQ ID NO:109, SEQ ID NO:111, SEQ ID NO:113, SEQ ID NO:115, SEQ ID NO:117, SEQ ID NO:119, SEQ ID NO:121, SEQ ID NO:123, SEQ ID NO:125, SEQ ID NO:127, SEQ ID NO:129, SEQ ID NO:131, SEQ ID NO:133, SEQ ID NO:135, SEQ ID NO:137, SEQ ID NO:139, SEQ ID NO:141, SEQ ID NO:143, SEQ ID NO:145, SEQ ID NO:147, SEQ ID NO:149, SEQ ID NO:151, SEQ ID NO:153, SEQ ID NO:155, SEQ ID NO:157, SEQ ID NO:159, SEQ ID NO:161, SEQ ID NO:163, SEQ ID NO:165, SEQ ID NO:167, SEQ ID NO:169, SEQ ID NO:171, SEQ ID NO:173, SEQ ID NO:175, SEQ ID NO:177, SEQ ID NO:179, SEQ ID NO:181, SEQ ID NO:183, SEQ ID NO:185, SEQ ID NO:187, SEQ ID NO:189, SEQ ID NO:191, SEQ ID NO:193, SEQ ID NO:195, SEQ ID NO:197, SEQ ID NO:199, SEQ ID NO:201, SEQ ID NO:203, SEQ ID NO:205, SEQ ID NO:207, SEQ ID NO:209, SEQ ID NO:211, SEQ ID NO:213, SEQ ID NO:215, SEQ ID NO:217, SEQ ID NO:219, SEQ ID NO:221, SEQ ID NO:223, SEQ ID NO:225, SEQ ID NO:227, SEQ ID NO:229, SEQ ID NO:231, SEQ ID NO:233, SEQ ID NO:235, SEQ ID NO:237, SEQ ID NO:239, SEQ ID NO:241, SEQ ID NO:243, SEQ ID NO:245, SEQ ID NO:247, SEQ ID NO:249, SEQ ID NO:251, SEQ ID NO:253, SEQ ID NO:255, SEQ ID NO:257, SEQ ID NO:259, SEQ ID NO:261, SEQ ID NO:263, SEQ ID NO:265, SEQ ID NO:267, SEQ ID NO:269, SEQ ID NO:271, SEQ ID NO:273, SEQ ID NO:275, SEQ ID NO:277, SEQ ID NO:279, SEQ ID NO:281, SEQ ID NO:283, SEQ ID NO:285, SEQ ID NO:287, SEQ ID NO:289, SEQ ID NO:291, SEQ ID NO:293, SEQ ID NO:295, SEQ ID NO:297, SEQ ID NO:299, SEQ ID NO:301, SEQ ID NO:303, SEQ ID NO:305, SEQ ID NO:307, SEQ ID NO:309, SEQ ID NO:311, SEQ ID NO:313, SEQ ID NO:315, SEQ ID NO:317, SEQ ID NO:319, SEQ ID NO:321, SEQ ID NO:323, SEQ ID NO:325, SEQ ID NO:327, SEQ ID NO:329, SEQ ID NO:331, SEQ ID NO:333, SEQ ID NO:335, SEQ ID NO:337, SEQ ID NO:339, SEQ ID NO:341, SEQ ID NO:343, SEQ ID NO:345, SEQ ID NO:347, SEQ ID NO:349, SEQ ID NO:351, SEQ ID NO:353, SEQ ID NO:355, SEQ ID NO:357, SEQ ID NO:359, SEQ ID NO:361, SEQ ID NO:363, SEQ ID NO:365, SEQ ID NO:367, SEQ ID NO:369, SEQ ID NO:371, SEQ ID NO:373, SEQ ID NO:375, SEQ ID NO:377, SEQ ID NO:379, SEQ ID NO:381, SEQ ID NO:383, SEQ ID NO:385, SEQ ID NO:387, SEQ ID NO:389, SEQ ID NO:391, SEQ ID NO:393, SEQ ID NO:395, SEQ ID NO:397, SEQ ID NO:399, SEQ ID NO:401, SEQ ID NO:403, SEQ ID NO:405, SEQ ID NO:407, SEQ ID NO:409, SEQ ID NO:411, SEQ ID NO:413, SEQ ID NO:415, SEQ ID NO:417, SEQ ID NO:419, SEQ ID NO:421, SEQ ID NO:423, SEQ ID NO:425, SEQ ID NO:427, SEQ ID NO:429, SEQ ID NO:431, SEQ ID NO:433, SEQ ID NO:435, SEQ ID NO:437, SEQ ID NO:439, SEQ ID NO:441, SEQ ID NO:443, SEQ ID NO:445, SEQ ID NO:447, SEQ ID NO:449, SEQ ID NO:451, SEQ ID NO:453, SEQ ID NO:455, SEQ ID NO:457, SEQ ID NO:459, SEQ ID NO:461, SEQ ID NO:463, SEQ ID NO:465, SEQ ID NO:467, SEQ ID NO:469, SEQ ID NO:471, SEQ ID NO:473, SEQ ID NO:475, SEQ ID NO:477, SEQ ID NO:479, SEQ ID NO:481, SEQ ID NO:483, SEQ ID NO:485, SEQ ID NO:487, SEQ ID NO:489, SEQ ID NO:491, SEQ ID NO:493, SEQ ID NO:495, SEQ ID NO:497, SEQ ID NO:499, SEQ ID NO:501, SEQ ID NO:503, SEQ ID NO:505, SEQ ID NO:507, SEQ ID NO:509, SEQ ID NO:511, SEQ ID NO:513, SEQ ID NO:515, SEQ ID NO:517, SEQ ID NO:519, SEQ ID NO:521, SEQ ID NO:523, SEQ ID NO:525, SEQ ID NO:527, SEQ ID NO:529, SEQ ID NO:531, SEQ ID NO:533, SEQ ID NO:535, SEQ ID NO:537, SEQ ID NO:539, SEQ ID NO:541, SEQ ID NO:543, SEQ ID NO:545, SEQ ID NO:547, SEQ ID NO:549, SEQ ID NO:551, SEQ ID NO:553, SEQ ID NO:555, SEQ ID NO:557, SEQ ID NO:559, SEQ ID NO:561, SEQ ID NO:563, SEQ ID NO:565, SEQ ID NO:567, SEQ ID NO:569, SEQ ID NO:571, SEQ ID NO:573, SEQ ID NO:575, SEQ ID NO:577, SEQ ID NO:579, SEQ ID NO:581, SEQ ID NO:583, SEQ ID NO:585, SEQ ID NO:587, SEQ ID NO:589, SEQ ID NO:591, SEQ ID NO:593, SEQ ID NO:595, SEQ ID NO:597, SEQ ID NO:599, SEQ ID NO:601, SEQ ID NO:603, SEQ ID NO:605, SEQ ID NO:607, SEQ ID NO:609, SEQ ID NO:611, SEQ ID NO:613, SEQ ID NO:615, SEQ ID NO:617, SEQ ID NO:619, SEQ ID NO:621, SEQ ID NO:623, SEQ ID NO:625, SEQ ID NO:627, SEQ ID NO:629, SEQ ID NO:631, SEQ ID NO:633, SEQ ID NO:635, SEQ ID NO:637, SEQ ID NO:639, SEQ ID NO:641, SEQ ID NO:643, SEQ ID NO:645, SEQ ID NO:647, SEQ ID NO:649, SEQ ID NO:651, SEQ ID NO:653, SEQ ID NO:655, SEQ ID NO:657, SEQ ID NO:659, SEQ ID NO:661, SEQ ID NO:663, SEQ ID NO:665, SEQ ID NO:667, SEQ ID NO:669, SEQ ID NO:671, SEQ ID NO:673, SEQ ID NO:675, SEQ ID NO:677, SEQ ID NO:679, SEQ ID NO:681, SEQ ID NO:683, SEQ ID NO:685, SEQ ID NO:687, SEQ ID NO:689, SEQ ID NO:691, SEQ ID NO:693, SEQ ID NO:695, SEQ ID NO:697, SEQ ID NO:699, SEQ ID NO:701, SEQ ID NO:703, SEQ ID NO:705, SEQ ID NO:707, SEQ ID NO:709, SEQ ID NO:711, SEQ ID NO:713, SEQ ID NO:715, SEQ ID NO:717, SEQ ID NO:719, SEQ ID NO:721, SEQ ID NO:723, SEQ ID NO:725, SEQ ID NO:727, SEQ ID NO:729, SEQ ID NO:731, SEQ ID NO:733, SEQ ID NO:735, SEQ ID NO:737, SEQ ID NO:739, SEQ ID NO:741, SEQ ID NO:743, SEQ ID NO:745, SEQ ID NO:747, SEQ ID NO:749, SEQ ID NO:751, SEQ ID NO:753, SEQ ID NO:755, SEQ ID NO:757, SEQ ID NO:759, SEQ ID NO:761, SEQ ID NO:763, SEQ ID NO:765, SEQ ID NO:767, SEQ ID NO:769, SEQ ID NO:771, SEQ ID NO:773, SEQ ID NO:775, SEQ ID NO:777, SEQ ID NO:779, SEQ ID NO:781, SEQ ID NO:783, SEQ ID NO:785, SEQ ID NO:787, SEQ ID NO:789, SEQ ID NO:791, SEQ ID NO:793, SEQ ID NO:795, SEQ ID NO:797, SEQ ID NO:799, SEQ ID NO:801, SEQ ID NO:803, SEQ ID NO:805, SEQ ID NO:807, SEQ ID NO:809, SEQ ID NO:811, SEQ ID NO:813, SEQ ID NO:815, SEQ ID NO:817, SEQ ID NO:819, SEQ ID NO:821, SEQ ID NO:823, SEQ ID NO:825, SEQ ID NO:827, SEQ ID NO:829, SEQ ID NO:831, SEQ ID NO:833, SEQ ID NO:835, SEQ ID NO:837, SEQ ID NO:839, SEQ ID NO:841, SEQ ID NO:843, SEQ ID NO:845, SEQ ID NO:847, SEQ ID NO:849, SEQ ID NO:851, SEQ ID NO:853, SEQ ID NO:855, SEQ ID NO:857, SEQ ID NO:859, SEQ ID NO:861, SEQ ID NO:863, SEQ ID NO:865, SEQ ID NO:867, SEQ ID NO:869, SEQ ID NO:871, SEQ ID NO:873, SEQ ID NO:875, SEQ ID NO:877, SEQ ID NO:879, SEQ ID NO:881, SEQ ID NO:883, SEQ ID NO:885, SEQ ID NO:887, SEQ ID NO:889, SEQ ID NO:891, SEQ ID NO:893, SEQ ID NO:895, SEQ ID NO:897, SEQ ID NO:899, SEQ ID NO:901, SEQ ID NO:903, SEQ ID NO:905, SEQ ID NO:907, SEQ ID NO:909, SEQ ID NO:911, SEQ ID NO:913, SEQ ID NO:915, SEQ ID NO:917, SEQ ID NO:919, SEQ ID NO:921, SEQ ID NO:923, SEQ ID NO:925, SEQ ID NO:927, SEQ ID NO:929, SEQ ID NO:931, SEQ ID NO:933, SEQ ID NO:935, SEQ ID NO:937, SEQ ID NO:939, SEQ ID NO:941, SEQ ID NO:943, SEQ ID NO:945, SEQ ID NO:947, SEQ ID NO:949, SEQ ID NO:951, SEQ ID NO:953, SEQ ID NO:955, SEQ ID NO:957, SEQ ID NO:959, SEQ ID NO:961, SEQ ID NO:963, SEQ ID NO:965, SEQ ID NO:967, SEQ ID NO:969, SEQ ID NO:971, SEQ ID NO:973, and/or SEQ ID NO:975, e.g., as described in Tables 1, 2 and 3 and in the Sequence Listing (all of these sequences are “exemplary polynucleotides of the invention”), and enzymatically active subsequences (fragments) thereof.
The invention provides isolated, synthetic or recombinant nucleic acids encoding a polypeptide having a transferase activity, e.g., a transaminase activity, e.g., a d-amino-acid transferase activity or a ω-transaminase activity, and/or an oxidoreductase activity, e.g., a dehydrogenase activity, e.g., a d-amino-acid dehydrogenase activity, wherein the nucleic acid has at least one sequence modification of an exemplary sequence of the invention, or, any sequence of the invention.
In one aspect (optionally), the isolated, synthetic or recombinant nucleic acids of the invention have a transferase activity, e.g., a transaminase activity, e.g., a d-amino-acid transferase activity or a ω-transaminase activity, and/or an oxidoreductase activity, e.g., a dehydrogenase activity, e.g., a d-amino-acid dehydrogenase activity, e.g., wherein the activity comprises catalyzing the transfer of a chemical group, catalyzing transamination, catalyzing the reaction: D-alanine+2-oxoglutarate<=>pyruvate+D-glutamate, and/or catalyzing an oxidation-reduction reaction, catalyzing the removal of hydrogen atoms, and/or catalyzing the reaction: D-amino acid+H2O+acceptor<=>a 2-oxo acid+NH3+reduced acceptor.
In one aspect, the transferase activity, e.g., transaminase activity, e.g., d-amino-acid transferase activity, and/or oxidoreductase activity, e.g., dehydrogenase activity, e.g., d-amino-acid dehydrogenase activity is thermostable, e.g., wherein the polypeptide retains a transferase activity, e.g., a transaminase activity, e.g., a d-amino-acid transferase activity or a transaminase activity, and/or an oxidoreductase activity, e.g., a dehydrogenase activity, e.g., a d-amino-acid dehydrogenase activity under conditions comprising a temperature range from about −100° C. to about −80° C., about −80° C. to about −40° C., about −40° C. to about −20° C., about −20° C. to about 0° C., about 0° C. to about 5° C., about 5° C. to about 15° C., about 15° C. to about 25° C., about 25° C. to about 37° C., about 37° C. to about 45° C., about 45° C. to about 55° C., about 55° C. to about 70° C., about 70° C. to about 75° C., about 75° C. to about 85° C., about 85° C. to about 90° C., about 90° C. to about 95° C., about 95° C. to about 100° C., about 100° C. to about 105° C., about 105° C. to about 110° C., about 110° C. to about 120° C., or 95° C., 96° C., 97° C., 98° C., 99° C., 100° C., 101° C., 102° C., 103° C., 104° C., 105° C., 106° C., 107° C., 108° C., 109° C., 110° C., 111° C., 112° C., 113° C., 114° C., 115° C. or more. In some embodiments, the thermostable polypeptides according to the invention retains activity, e.g., a transferase activity, e.g., a transaminase activity, e.g., a d-amino-acid transferase activity or a ω-transaminase activity, and/or an oxidoreductase activity, e.g., a dehydrogenase activity, e.g., a d-amino-acid dehydrogenase activity, at a temperature in the ranges described above, at about pH 3.0, about pH 3.5, about pH 4.0, about pH 4.5, about pH 5.0, about pH 5.5, about pH 6.0, about pH 6.5, about pH 7.0, about pH 7.5, about pH 8.0, about pH 8.5, about pH 9.0, about pH 9.5, about pH 10.0, about pH 10.5, about pH 11.0, about pH 11.5, about pH 12.0 or more.
In one aspect, the transferase activity, e.g., transaminase activity, e.g., d-amino-acid transferase activity, and/or oxidoreductase activity, e.g., dehydrogenase activity, e.g., d-amino-acid dehydrogenase activity is thermotolerant, e.g., wherein the polypeptide retains a transferase activity, e.g., a transaminase activity, e.g., a d-amino-acid transferase activity, or a ω-transaminase activity and/or an oxidoreductase activity, e.g., a dehydrogenase activity, e.g., a d-amino-acid dehydrogenase activity after exposure to a temperature in the range from about −100° C. to about −80° C., about −80° C. to about −40° C., about −40° C. to about −20° C., about −20° C. to about 0° C., about 0° C. to about 5° C., about 5° C. to about 15° C., about 15° C. to about 25° C., about 25° C. to about 37° C., about 37° C. to about 45° C., about 45° C. to about 55° C., about 55° C. to about 70° C., about 70° C. to about 75° C., about 75° C. to about 85° C., about 85° C. to about 90° C., about 90° C. to about 95° C., about 95° C. to about 100° C., about 100° C. to about 105° C., about 105° C. to about 110° C., about 110° C. to about 120° C., or 95° C., 96° C., 97° C., 98° C., 99° C., 100° C., 101° C., 102° C., 103° C., 104° C., 105° C., 106° C., 107° C., 108° C., 109° C., 110° C., 111° C., 112° C., 113° C., 114° C., 115° C. or more. The thermotolerant polypeptides according to the invention can retain activity, e.g. a transferase activity, e.g., a transaminase activity, e.g., a d-amino-acid transferase activity or a ω-transaminase activity, and/or an oxidoreductase activity, e.g., a dehydrogenase activity, e.g., a d-amino-acid dehydrogenase activity, after exposure to a temperature in the range from about −100° C. to about −80° C., about −80° C. to about −40° C., about −40° C. to about −20° C., about −20° C. to about 0° C., about 0° C. to about 5° C., about 5° C. to about 15° C., about 15° C. to about 25° C., about 25° C. to about 37° C., about 37° C. to about 45° C., about 45° C. to about 55° C., about 55° C. to about 70° C., about 70° C. to about 75° C., about 75° C. to about 85° C., about 85° C. to about 90° C., about 90° C. to about 95° C., about 95° C. to about 100° C., about 100° C. to about 105° C., about 105° C. to about 110° C., about 110° C. to about 120° C., or 95° C., 96° C., 97° C., 98° C., 99° C., 100° C., 101° C., 102° C., 103° C., 104° C., 105° C., 106° C., 107° C., 108° C., 109° C., 110° C., 111° C., 112° C., 113° C., 114° C., 115° C. or more. In some embodiments, the thermotolerant polypeptides according to the invention retains activity, e.g. a transferase activity, e.g., a transaminase activity, e.g., a d-amino-acid transferase activity or a ω-transaminase activity, and/or an oxidoreductase activity, e.g., a dehydrogenase activity, e.g., a d-amino-acid dehydrogenase activity, after exposure to a temperature in the ranges described above, at about pH 3.0, about pH 3.5, about pH 4.0, about pH 4.5, about pH 5.0, about pH 5.5, about pH 6.0, about pH 6.5, about pH 7.0, about pH 7.5, about pH 8.0, about pH 8.5, about pH 9.0, about pH 9.5, about pH 10.0, about pH 10.5, about pH 11.0, about pH 11.5, about pH 12.0 or more.
In one aspect, the transferase activity, e.g., transaminase activity, e.g., d-amino-acid transferase activity, and/or oxidoreductase activity, e.g., dehydrogenase activity, e.g., d-amino-acid dehydrogenase activity of polypeptides encoded by nucleic acids of the invention retain activity under acidic conditions comprising about pH 6.5, pH 6, pH 5.5, pH 5, pH 4.5, pH 4.0, pH 3.5, pH 3.0 or less (more acidic) pH, or, retain a transferase activity, e.g., a transaminase activity, e.g., a d-amino-acid transferase activity or a ω-transaminase activity, and/or an oxidoreductase activity, e.g., a dehydrogenase activity, e.g., a d-amino-acid dehydrogenase activity after exposure to acidic conditions comprising about pH 6.5, pH 6, pH 5.5, pH 5, pH 4.5, pH 4.0, pH 3.5, pH 3.0 or less (more acidic) pH; or, retain activity under basic conditions comprising about pH 7, pH 7.5 pH 8.0, pH 8.5, pH 9, pH 9.5, pH 10, pH 10.5, pH 11, pH 11.5, pH 12, pH 12.5 or more (more basic) or, retain a transferase activity, e.g., a transaminase activity, e.g., a d-amino-acid transferase activity or a ω-transaminase activity, and/or an oxidoreductase activity, e.g., a dehydrogenase activity, e.g., a d-amino-acid dehydrogenase activity after exposure to basic conditions comprising about pH 7, pH 7.5 pH 8.0, pH 8.5, pH 9, pH 9.5, pH 10, pH 10.5, pH 11, pH 11.5, pH 12, pH 12.5 or more (more basic). In one aspect, transferase activity, e.g., transaminase activity, e.g., d-amino-acid transferase activity, and/or oxidoreductase activity, e.g., dehydrogenase activity, e.g., d-amino-acid dehydrogenase activity of polypeptides encoded by nucleic acids of the invention retain activity at a temperature of at least about 80° C., 81° C., 82° C., 83° C., 84° C., 85° C., 86° C., 87° C., 88° C., 89° C., 90° C., 91° C., 92° C., 93° C., 94° C., 95° C., 96° C., 97° C., 98° C., 99° C., 100° C., 101° C., 102° C., 103° C., 103.5° C., 104° C., 105° C., 107° C., 108° C., 109° C. or 110° C., or more, and a basic pH of at least about pH 7.5 pH 8.0, pH 8.5, pH 9, pH 9.5, pH 10, pH 10.5, pH 11, pH 11.5, pH 12, pH 12.5 or more (more basic).
The invention provides expression cassettes, cloning vehicles, or a vector (e.g., expression vectors) comprising a nucleic acid comprising a sequence of the invention. The cloning vehicle can comprise a viral vector, a plasmid, a phage, a phagemid, a cosmid, a fosmid, a bacteriophage or an artificial chromosome. The viral vector can comprise an adenovirus vector, a retroviral vector or an adeno-associated viral vector. The cloning vehicle can comprise an artificial chromosome comprising a bacterial artificial chromosome (BAC), a bacteriophage P1-derived vector (PAC), a yeast artificial chromosome (YAC), or a mammalian artificial chromosome (MAC).
The invention provides nucleic acid probes for identifying a nucleic acid encoding a polypeptide with a transferase activity, e.g., a transaminase activity, e.g., a d-amino-acid transferase activity or a ω-transaminase activity, and/or an oxidoreductase activity, e.g., a dehydrogenase activity, e.g., a d-amino-acid dehydrogenase activity, wherein the probe comprises at least about 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 100, 125, 150, 175, 200, 225, 250, 275, 300 or more consecutive bases of a nucleic acid comprising an exemplary sequence of the invention, or, any sequence of the invention (as defined herein), wherein in one aspect (optionally) the probe comprises an oligonucleotide comprising between at least about 10 to 300, about 25 to 250, about 10 to 50, about 20 to 60, about 30 to 70, about 40 to 80, about 60 to 100, or about 50 to 150 or more consecutive bases.
The invention provides amplification primer pairs for amplifying a nucleic acid encoding a polypeptide having a transferase activity, e.g., a transaminase activity, e.g., a d-amino-acid transferase activity or a ω-transaminase activity, and/or an oxidoreductase activity, e.g., a dehydrogenase activity, e.g., a d-amino-acid dehydrogenase activity, wherein the primer pair is capable of amplifying a nucleic acid comprising an exemplary sequence of the invention, or, any sequence of the invention (as defined herein), or a subsequence thereof, wherein optionally a member of the amplification primer sequence pair comprises an oligonucleotide comprising at least about 10 to 50 consecutive bases of the sequence, or, about 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35 or more consecutive bases of the sequence. The invention provides amplification primer pairs wherein the primer pair comprises a first member having a sequence as set forth by about the first (the 5′) 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35 or more residues of an exemplary sequence of the invention, or, any sequence of the invention (as defined herein), and a second member having a sequence as set forth by about the first (the 5′) 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35 or more residues of the complementary strand of the first member.
The invention provides a transferase-, e.g., a transaminase-, e.g., a d-amino-acid transferase-, and/or an oxidoreductase-, e.g., a dehydrogenase-, e.g., a d-amino-acid dehydrogenase-encoding nucleic acids generated by amplification of a polynucleotide using an amplification primer pair of the invention, wherein optionally the amplification is by polymerase chain reaction (PCR). In one aspect, the nucleic acid is generated by amplification of a gene library, wherein in one aspect (optionally) the gene library is an environmental library. The invention provides isolated, synthetic or recombinant transferases and/or oxidoreductases encoded by a transferase-, e.g., a transaminase-, e.g., a d-amino-acid transferase-, and/or an oxidoreductase-, e.g., a dehydrogenase-, e.g., a d-amino-acid dehydrogenase-encoding nucleic acid generated by amplification of a polynucleotide using an amplification primer pair of the invention. The invention provides methods of amplifying a nucleic acid encoding a polypeptide having a transferase activity, e.g., a transaminase activity, e.g., a d-amino-acid transferase activity or a ω-transaminase activity, and/or an oxidoreductase activity, e.g., a dehydrogenase activity, e.g., a d-amino-acid dehydrogenase activity, the methods comprising the step of amplification of a template nucleic acid with an amplification primer sequence pair capable of amplifying an exemplary sequence of the invention, or, any sequence of the invention (as defined herein), or a subsequence thereof.
The invention provides expression cassette, a vector or a cloning vehicle comprising a nucleic acid comprising a sequence of the invention, wherein optionally the cloning vehicle comprises a viral vector, a plasmid, a phage, a phagemid, a cosmid, a fosmid, a bacteriophage or an artificial chromosome. The viral vector can comprise an adenovirus vector, a retroviral vector or an adeno-associated viral vector, or, the artificial chromosome comprises a bacterial artificial chromosome (BAC), a bacteriophage P1-derived vector (PAC), a yeast artificial chromosome (YAC), or a mammalian artificial chromosome (MAC).
The invention provides transformed cells comprising a nucleic acid or vector of the invention, or an expression cassette or cloning vehicle of the invention. The transformed cell can be a bacterial cell, a mammalian cell, a fungal cell, a yeast cell, an insect cell or a plant cell.
The invention provides transgenic non-human animals comprising a sequence of the invention. The transgenic non-human animal can be a mouse, a rat, a rabbit, a sheep, a pig, a chicken, a goat, a fish, a dog, or a cow. The invention provides transgenic plants comprising a sequence of the invention, e.g., wherein the plant is a corn plant, a sorghum plant, a potato plant, a tomato plant, a wheat plant, an oilseed plant, a rapeseed plant, a soybean plant, a rice plant, a barley plant, a grass, or a tobacco plant. The invention provides transgenic seeds comprising a sequence of the invention, e.g., wherein the seed is a corn seed, a wheat kernel, an oilseed, a rapeseed, a soybean seed, a palm kernel, a sunflower seed, a sesame seed, a rice, a barley, a peanut or a tobacco plant seed.
The invention provides antisense oligonucleotides comprising a nucleic acid sequence complementary to or capable of hybridizing under stringent conditions to a sequence of the invention (including, e.g., exemplary sequences of the invention), or a subsequence thereof, wherein optionally the antisense oligonucleotide is between about 10 to 50, about 20 to 60, about 30 to 70, about 40 to 80, or about 60 to 100 bases in length, and in one aspect (optionally) the stringent conditions comprise a wash step comprising a wash in 0.2×SSC at a temperature of about 65° C. for about 15 minutes.
The invention provides methods of inhibiting the translation of a transferase, e.g., a transaminase, e.g., a d-amino-acid transferase, and/or an oxidoreductase, e.g., a dehydrogenase, e.g., a d-amino-acid dehydrogenase message in a cell comprising administering to the cell or expressing in the cell an antisense oligonucleotide comprising a nucleic acid sequence complementary to or capable of hybridizing under stringent conditions to a sequence of the invention (including, e.g., exemplary sequences of the invention).
The invention provides double-stranded inhibitory RNA (RNAi) molecules comprising a subsequence of a sequence of the invention (including, e.g., exemplary sequences of the invention). The double-stranded inhibitory RNA (RNAi) molecule can be about 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, or 30 or more duplex nucleotides in length. The invention provides methods of inhibiting the expression of a transferase, e.g., a transaminase, e.g., a d-amino-acid transferase, and/or an oxidoreductase, e.g., a dehydrogenase, e.g., a d-amino-acid dehydrogenase in a cell comprising administering to the cell or expressing in the cell a double-stranded inhibitory RNA (iRNA), wherein the RNA comprises a subsequence of a sequence of the invention (including, e.g., exemplary sequences of the invention).
The invention provides isolated, synthetic or recombinant polypeptides having a transferase activity, e.g., a transaminase activity, e.g., a d-amino-acid transferase activity or a transaminase activity, and/or an oxidoreductase activity, e.g., a dehydrogenase activity, e.g., a d-amino-acid dehydrogenase activity, or polypeptides capable of generating an immune response specific for a transferase, e.g., a transaminase, e.g., a d-amino-acid transferase, and/or an oxidoreductase, e.g., a dehydrogenase, e.g., a d-amino-acid dehydrogenase (e.g., an epitope); and in alternative aspects peptide and polypeptide of the invention comprise a sequence:
(a) comprising an amino acid sequence having at least about 50%, 51%, 52%, 53%, 54%, 55%, 56%, 57%, 58%, 59%, 60%, 61%, 62%, 63%, 64%, 65%, 66%, 67%, 68%, 69%, 70%, 71%, 72%, 73%, 74%, 75%, 76%, 77%, 78%, 79%, 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or more, or has 100% (complete) sequence identity to SEQ ID NO:2, SEQ ID NO:4, SEQ ID NO:6, SEQ ID NO:8, SEQ ID NO:10, SEQ ID NO:12, SEQ ID NO:14, SEQ ID NO:16, SEQ ID NO:18, SEQ ID NO:20, SEQ ID NO:22, SEQ ID NO:24, SEQ ID NO:26, SEQ ID NO:28, SEQ ID NO:30, SEQ ID NO:32, SEQ ID NO:34, SEQ ID NO:36, SEQ ID NO:38, SEQ ID NO:40, SEQ ID NO:42, SEQ ID NO:44, SEQ ID NO:46, SEQ ID NO:48, SEQ ID NO:50, SEQ ID NO:52, SEQ ID NO:54, SEQ ID NO:56, SEQ ID NO:58, SEQ ID NO:60, SEQ ID NO:62, SEQ ID NO:64, SEQ ID NO:66, SEQ ID NO:68, SEQ ID NO:70, SEQ ID NO:72, SEQ ID NO:74, SEQ ID NO:76, SEQ ID NO:78, SEQ ID NO:80, SEQ ID NO:82, SEQ ID NO:84, SEQ ID NO:86, SEQ ID NO:88, SEQ ID NO:90, SEQ ID NO:92, SEQ ID NO:94, SEQ ID NO:96, SEQ ID NO:98, SEQ ID NO:100, SEQ ID NO:102, SEQ ID NO:104, SEQ ID NO:106, SEQ ID NO:108, SEQ ID NO:110, SEQ ID NO:112, SEQ ID NO:114, SEQ ID NO:116, SEQ ID NO:118, SEQ ID NO:120, SEQ ID NO:122, SEQ ID NO:124, SEQ ID NO:126, SEQ ID NO:128, SEQ ID NO:130, SEQ ID NO:132, SEQ ID NO:134, SEQ ID NO:136, SEQ ID NO:138, SEQ ID NO:140, SEQ ID NO:142, SEQ ID NO:143, SEQ ID NO:146, SEQ ID NO:148, SEQ ID NO:150, SEQ ID NO:152, SEQ ID NO:154, SEQ ID NO:156, SEQ ID NO:158, SEQ ID NO:160, SEQ ID NO:162, SEQ ID NO:164, SEQ ID NO:166, SEQ ID NO:168, SEQ ID NO:170, SEQ ID NO:172, SEQ ID NO:174, SEQ ID NO:176, SEQ ID NO:178, SEQ ID NO:180, SEQ ID NO:182, SEQ ID NO:184, SEQ ID NO:186, SEQ ID NO:188, SEQ ID NO:190, SEQ ID NO:192, SEQ ID NO:194, SEQ ID NO:196, SEQ ID NO:198, SEQ ID NO:200, SEQ ID NO:202, SEQ ID NO:204, SEQ ID NO:206, SEQ ID NO:208, SEQ ID NO:210, SEQ ID NO:212, SEQ ID NO:214, SEQ ID NO:216, SEQ ID NO:218, SEQ ID NO:220, SEQ ID NO:220 with one, several or all of the modifications of Table 46 or Table 55, SEQ ID NO:222, SEQ ID NO:224, SEQ ID NO:226, SEQ ID NO:228, SEQ ID NO:230, SEQ ID NO:232, SEQ ID NO:234, SEQ ID NO:236, SEQ ID NO:238, SEQ ID NO:240, SEQ ID NO:242, SEQ ID NO:244, SEQ ID NO:246, SEQ ID NO:248, SEQ ID NO:250, SEQ ID NO:252, SEQ ID NO:254, SEQ ID NO:256, SEQ ID NO:258, SEQ ID NO:260, SEQ ID NO:262, SEQ ID NO:264, SEQ ID NO:266, SEQ ID NO:268, SEQ ID NO:270, SEQ ID NO:272, SEQ ID NO:274, SEQ ID NO:276, SEQ ID NO:278, SEQ ID NO:280, SEQ ID NO:282, SEQ ID NO:284, SEQ ID NO:286, SEQ ID NO:288, SEQ ID NO:290, SEQ ID NO:292, SEQ ID NO:294, SEQ ID NO:296, SEQ ID NO:298, SEQ ID NO:300, SEQ ID NO:302, SEQ ID NO:304, SEQ ID NO:306, SEQ ID NO:308, SEQ ID NO:310, SEQ ID NO:312, SEQ ID NO:314, SEQ ID NO:316, SEQ ID NO:318, SEQ ID NO:320, SEQ ID NO:322, SEQ ID NO:324, SEQ ID NO:326, SEQ ID NO:328, SEQ ID NO:330, SEQ ID NO:332, SEQ ID NO:334, SEQ ID NO:336, SEQ ID NO:338, SEQ ID NO:340, SEQ ID NO:342, SEQ ID NO:344, SEQ ID NO:346, SEQ ID NO:348, SEQ ID NO:350, SEQ ID NO:352, SEQ ID NO:354, SEQ ID NO:356, SEQ ID NO:358, SEQ ID NO:360, SEQ ID NO:362, SEQ ID NO:364, SEQ ID NO:366, SEQ ID NO:368, SEQ ID NO:370, SEQ ID NO:372, SEQ ID NO:374, SEQ ID NO:376, SEQ ID NO:378, SEQ ID NO:380, SEQ ID NO:382, SEQ ID NO:384, SEQ ID NO:386, SEQ ID NO:388, SEQ ID NO:390, SEQ ID NO:392, SEQ ID NO:394, SEQ ID NO:396, SEQ ID NO:398, SEQ ID NO:400, SEQ ID NO:402, SEQ ID NO:404, SEQ ID NO:406, SEQ ID NO:408, SEQ ID NO:410, SEQ ID NO:412, SEQ ID NO:414, SEQ ID NO:416, SEQ ID NO:418, SEQ ID NO:420, SEQ ID NO:422, SEQ ID NO:424, SEQ ID NO:426, SEQ ID NO:428, SEQ ID NO:430, SEQ ID NO:432, SEQ ID NO:434, SEQ ID NO:436, SEQ ID NO:438, SEQ ID NO:440, SEQ ID NO:442, SEQ ID NO:444, SEQ ID NO:446, SEQ ID NO:448, SEQ ID NO:450, SEQ ID NO:452, SEQ ID NO:454, SEQ ID NO:456, SEQ ID NO:458, SEQ ID NO:460, SEQ ID NO:462, SEQ ID NO:464, SEQ ID NO:466, SEQ ID NO:468, SEQ ID NO:470, SEQ ID NO:472, SEQ ID NO:474, SEQ ID NO:476, SEQ ID NO:478, SEQ ID NO:480, SEQ ID NO:482, SEQ ID NO:484, SEQ ID NO:486, SEQ ID NO:488, SEQ ID NO:490, SEQ ID NO:492, SEQ ID NO:494, SEQ ID NO:496, SEQ ID NO:498, SEQ ID NO:500, SEQ ID NO:502, SEQ ID NO:504, SEQ ID NO:506, SEQ ID NO:508, SEQ ID NO:510, SEQ ID NO:512, SEQ ID NO:514, SEQ ID NO:516, SEQ ID NO:518, SEQ ID NO:520, SEQ ID NO:522, SEQ ID NO:524, SEQ ID NO:526, SEQ ID NO:528, SEQ ID NO:530, SEQ ID NO:532, SEQ ID NO:534, SEQ ID NO:536, SEQ ID NO:538, SEQ ID NO:540, SEQ ID NO:542, SEQ ID NO:544, SEQ ID NO:546, SEQ ID NO:548, SEQ ID NO:550, SEQ ID NO:552, SEQ ID NO:554, SEQ ID NO:556, SEQ ID NO:558, SEQ ID NO:560, SEQ ID NO:562, SEQ ID NO:564, SEQ ID NO:566, SEQ ID NO:568, SEQ ID NO:570, SEQ ID NO:572, SEQ ID NO:574, SEQ ID NO:576, SEQ ID NO:578, SEQ ID NO:580, SEQ ID NO:582, SEQ ID NO:584, SEQ ID NO:586, SEQ ID NO:588, SEQ ID NO:590, SEQ ID NO:592, SEQ ID NO:594, SEQ ID NO:596, SEQ ID NO:598, SEQ ID NO:600, SEQ ID NO:602, SEQ ID NO:604, SEQ ID NO:606, SEQ ID NO:608, SEQ ID NO:610, SEQ ID NO:612, SEQ ID NO:614, SEQ ID NO:616, SEQ ID NO:618, SEQ ID NO:620, SEQ ID NO:622, SEQ ID NO:624, SEQ ID NO:626, SEQ ID NO:628, SEQ ID NO:630, SEQ ID NO:632, SEQ ID NO:634, SEQ ID NO:636, SEQ ID NO:638, SEQ ID NO:640, SEQ ID NO:642, SEQ ID NO:644, SEQ ID NO:646, SEQ ID NO:648, SEQ ID NO:650, SEQ ID NO:652, SEQ ID NO:654, SEQ ID NO:656, SEQ ID NO:658, SEQ ID NO:660, SEQ ID NO:662, SEQ ID NO:664, SEQ ID NO:666, SEQ ID NO:668, SEQ ID NO:670, SEQ ID NO:672, SEQ ID NO:674, SEQ ID NO:676, SEQ ID NO:678, SEQ ID NO:680, SEQ ID NO:682, SEQ ID NO:684, SEQ ID NO:686, SEQ ID NO:688, SEQ ID NO:690, SEQ ID NO:692, SEQ ID NO:694, SEQ ID NO:696, SEQ ID NO:698, SEQ ID NO:700, SEQ ID NO:702, SEQ ID NO:704, SEQ ID NO:706, SEQ ID NO:708, SEQ ID NO:710, SEQ ID NO:712, SEQ ID NO:714, SEQ ID NO:716, SEQ ID NO:718, SEQ ID NO:720, SEQ ID NO:722, SEQ ID NO:724, SEQ ID NO:726, SEQ ID NO:728, SEQ ID NO:730, SEQ ID NO:732, SEQ ID NO:734, SEQ ID NO:736, SEQ ID NO:738, SEQ ID NO:740, SEQ ID NO:742, SEQ ID NO:744, SEQ ID NO:746, SEQ ID NO:748, SEQ ID NO:750, SEQ ID NO:752, SEQ ID NO:754, SEQ ID NO:756, SEQ ID NO:758, SEQ ID NO:760, SEQ ID NO:762, SEQ ID NO:764, SEQ ID NO:766, SEQ ID NO:768, SEQ ID NO:770, SEQ ID NO:772, SEQ ID NO:774, SEQ ID NO:776, SEQ ID NO:778, SEQ ID NO:780, SEQ ID NO:782, SEQ ID NO:784, SEQ ID NO:786, SEQ ID NO:788, SEQ ID NO:790, SEQ ID NO:792, SEQ ID NO:794, SEQ ID NO:796, SEQ ID NO:798, SEQ ID NO:800, SEQ ID NO:802, SEQ ID NO:804, SEQ ID NO:808, SEQ ID NO:808, SEQ ID NO:810, SEQ ID NO:812, SEQ ID NO:814, SEQ ID NO:816, SEQ ID NO:818, SEQ ID NO:820, SEQ ID NO:822, SEQ ID NO:824, SEQ ID NO:826, SEQ ID NO:828, SEQ ID NO:830, SEQ ID NO:832, SEQ ID NO:834, SEQ ID NO:836, SEQ ID NO:838, SEQ ID NO:840, SEQ ID NO:842, SEQ ID NO:844, SEQ ID NO:846, SEQ ID NO:848, SEQ ID NO:850, SEQ ID NO:852, SEQ ID NO:854, SEQ ID NO:856, SEQ ID NO:858, SEQ ID NO:860, SEQ ID NO:862, SEQ ID NO:864, SEQ ID NO:866, SEQ ID NO:868, SEQ ID NO:870, SEQ ID NO:872, SEQ ID NO:874, SEQ ID NO:876, SEQ ID NO:878, SEQ ID NO:880, SEQ ID NO:882, SEQ ID NO:884, SEQ ID NO:886, SEQ ID NO:888, SEQ ID NO:890, SEQ ID NO:892, SEQ ID NO:894, SEQ ID NO:896, SEQ ID NO:898, SEQ ID NO:900, SEQ ID NO:902, SEQ ID NO:904, SEQ ID NO:906, SEQ ID NO:908, SEQ ID NO:910, SEQ ID NO:912, SEQ ID NO:914, SEQ ID NO:916, SEQ ID NO:918, SEQ ID NO:920, SEQ ID NO:922, SEQ ID NO:924, SEQ ID NO:926, SEQ ID NO:928, SEQ ID NO:930, SEQ ID NO:932, SEQ ID NO:934, SEQ ID NO:936, SEQ ID NO:938, SEQ ID NO:940, SEQ ID NO:942, SEQ ID NO:944, SEQ ID NO:946, SEQ ID NO:948, SEQ ID NO:950, SEQ ID NO:952, SEQ ID NO:954, SEQ ID NO:956, SEQ ID NO:958, SEQ ID NO:960, SEQ ID NO:962, SEQ ID NO:964, SEQ ID NO:966, SEQ ID NO:968, SEQ ID NO:970, SEQ ID NO:972, SEQ ID NO:974 and/or SEQ ID NO:976, or enzymatically active fragments thereof,
wherein the polypeptide or peptide of (i) or (ii) has a transferase activity, e.g., a transaminase activity, e.g., a d-amino-acid transferase activity or a ω-transaminase activity, and/or an oxidoreductase activity, e.g., a dehydrogenase activity, e.g., a d-amino-acid dehydrogenase activity, or the polypeptide or peptide is capable of generating a transferase specific antibody, e.g., a transaminase, e.g., a d-amino-acid transferase, and/or an oxidoreductase, e.g., a dehydrogenase, e.g., a d-amino-acid dehydrogenase specific antibody (a polypeptide or peptide that acts as an epitope or immunogen),
(b) the polypeptide or peptide of (a), wherein the sequence identities are determined: (A) by analysis with a sequence comparison algorithm or by a visual inspection, or (B) over a region of at least about 20, 25, 30, 35, 40, 45, 50, 55, 60, 75, 100, 150, 200, 250, 300 or more amino acid residues, or over the full length of the polypeptide or peptide or enzyme, and/or enzymatically active subsequences (fragments) thereof,
(c) the polypeptide or peptide of (a) of (b), wherein the sequence identities are determined by analysis with a sequence comparison algorithm or by a visual inspection, and optionally the sequence comparison algorithm is a BLAST version 2.2.2 algorithm where a filtering setting is set to blastall -p blastp -d “nr pataa” -F F, and all other options are set to default;
(d) an amino acid sequence encoded by the nucleic acid of claim 1, wherein the polypeptide has (i) a transferase activity, e.g., a transaminase activity, e.g., a d-amino-acid transferase activity or a ω-transaminase activity, and/or an oxidoreductase activity, e.g., a dehydrogenase activity, e.g., a d-amino-acid dehydrogenase activity, or, (ii) has immunogenic activity in that it is capable of generating an antibody that specifically binds to a polypeptide having a sequence of (a), and/or enzymatically active subsequences (fragments) thereof;
(e) the amino acid sequence of any of (a) to (d), and comprising at least one amino acid residue conservative substitution, and the polypeptide or peptide retains transferase activity, e.g., transaminase activity, e.g., d-amino-acid transferase activity, and/or oxidoreductase activity, e.g., dehydrogenase activity, e.g., d-amino-acid dehydrogenase activity;
(e) the amino acid sequence of (d), wherein the conservative substitution comprises replacement of an aliphatic amino acid with another aliphatic amino acid; replacement of a serine with a threonine or vice versa; replacement of an acidic residue with another acidic residue; replacement of a residue bearing an amide group with another residue bearing an amide group; exchange of a basic residue with another basic residue; or, replacement of an aromatic residue with another aromatic residue, or a combination thereof,
(f) the amino acid sequence of (e), wherein the aliphatic residue comprises Alanine, Valine, Leucine, Isoleucine or a synthetic equivalent thereof; the acidic residue comprises Aspartic acid, Glutamic acid or a synthetic equivalent thereof; the residue comprising an amide group comprises Aspartic acid, Glutamic acid or a synthetic equivalent thereof; the basic residue comprises Lysine, Arginine or a synthetic equivalent thereof; or, the aromatic residue comprises Phenylalanine, Tyrosine or a synthetic equivalent thereof;
(g) the polypeptide of any of (a) to (f) having a transferase activity, e.g., a transaminase activity, e.g., a d-amino-acid transferase activity or a ω-transaminase activity, and/or an oxidoreductase activity, e.g., a dehydrogenase activity, e.g., a d-amino-acid dehydrogenase activity but lacking a signal sequence, a prepro domain, a binding domain, and/or other domain,
(h) the polypeptide of (g) wherein the binding domain comprises, or consists of, a NAD, a NAD(P), a calcium, a thiamine, a FAD, a zinc, a DNA and/or a lipoyl binding domain;
(i) the polypeptide of any of (a) to (h) having a transferase activity, e.g., a transaminase activity, e.g., a d-amino-acid transferase activity or a ω-transaminase activity, and/or an oxidoreductase activity, e.g., a dehydrogenase activity, e.g., a d-amino-acid dehydrogenase activity further comprising a heterologous sequence;
(j) the polypeptide of (i), wherein the heterologous sequence comprises, or consists of: (A) a heterologous signal sequence, a heterologous domain, a heterologous binding domain, a heterologous dockerin domain, a heterologous catalytic domain (CD), or a combination thereof; (B) the sequence of (A), wherein the heterologous signal sequence, binding domain or catalytic domain (CD) is derived from a heterologous enzyme; and/or, (C) a tag, an epitope, a targeting peptide, a cleavable sequence, a detectable moiety or an enzyme;
(k) the polypeptide of (i) or (j), wherein the heterologous sequence or the heterologous binding domain comprises, or consists of, a NAD, a NAD(P), a calcium, a thiamine, a FAD, a zinc, a DNA and/or a lipoyl binding domain;
(l) polypeptide of (i), wherein the heterologous signal sequence targets the encoded protein to a vacuole, the endoplasmic reticulum, a chloroplast or a starch granule; or
(m) comprising an amino acid sequence encoded any nucleic acid sequence of this invention.
In one aspect, the transferase activity, e.g., transaminase activity, e.g., d-amino-acid transferase activity, and/or oxidoreductase activity, e.g., dehydrogenase activity, e.g., d-amino-acid dehydrogenase activity comprises catalyzing the transfer of a chemical group, catalyzing transamination, catalyzing the reaction: D-alanine+2-oxoglutarate<=>pyruvate+D-glutamate, and/or catalyzing an oxidation-reduction reaction, catalyzing the removal of hydrogen atoms, and/or catalyzing the reaction: D-amino acid+H2O+acceptor<=>a 2-oxo acid+NH3+reduced acceptor.
The invention provides isolated, synthetic or recombinant polypeptides comprising a polypeptide of the invention and lacking a signal sequence or a prepro sequence. The invention provides isolated, synthetic or recombinant polypeptides comprising a polypeptide of the invention and having a heterologous signal sequence or a heterologous prepro sequence.
In one aspect, a polypeptide of the invention has transferase activity, e.g., transaminase activity, e.g., d-amino-acid transferase activity, and/or oxidoreductase activity, e.g., dehydrogenase activity, e.g., d-amino-acid dehydrogenase activity comprising a specific activity at about 37° C. in the range from about 100 to about 1000 units per milligram of protein, from about 500 to about 750 units per milligram of protein, from about 500 to about 1200 units per milligram of protein, or from about 750 to about 1000 units per milligram of protein. In alternative aspects, polypeptides of the invention have transferase activity, e.g., transaminase activity, e.g., d-amino-acid transferase activity, and/or oxidoreductase activity, e.g., dehydrogenase activity, e.g., d-amino-acid dehydrogenase activity in the range of between about 0.05 to 20 units per gram, or 0.05, 0.10, 0.20, 0.30, 0.40, 0.50, 0.60, 0.70, 0.80, 0.90, 1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, 5.0, 5.5, 6.0, 6.5, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19 or 20 or more units per gram, where a unit equals one μmol of product released per minute per mg of enzyme. In one embodiment, for transaminases, one unit of activity equals one umol of alpha-keto acid or ketone produced per minute per mg of enzyme (formed from the respective alpha-amino acid or amine). In an alternative embodiment, for transaminases, one unit of activity equals one umol of alpha-amino acid or amine produced per minute per mg of enzyme (formed from the respective alpha-keto acid or ketone).
In one aspect, the polypeptides of the invention comprise at least one glycosylation site or further comprises a polysaccharide. The glycosylation can be an N-linked glycosylation, e.g., wherein the polypeptide is glycosylated after being expressed in a P. pastoris or a S. pombe. 
The invention provides protein preparation comprising a polypeptide of the invention, wherein the protein preparation comprises a liquid, a slurry, a solid or a gel. The invention provides heterodimers comprising a polypeptide of the invention and a second domain. The second domain can be a polypeptide and the heterodimer is a fusion protein. The second domain can be an epitope or a tag.
The invention provides homodimers or heterodimers comprising a polypeptide of the invention. The invention provides immobilized polypeptides, wherein the polypeptide comprises a sequence of the invention, or a subsequence thereof, or a polypeptide encoded by a nucleic acid of the invention, or a polypeptide comprising a polypeptide of the invention and a second domain, e.g., wherein the polypeptide is immobilized on or inside a cell, a vesicle, a liposome, a film, a membrane, a metal, a resin, a polymer, a ceramic, a glass, a microelectrode, a graphitic particle, a bead, a gel, a plate, an array, a capillary tube, a crystal, a tablet, a pill, a capsule, a powder, an agglomerate, a surface, a porous structure, or materials such as wood chips, brownstock, pulp, paper, and materials deriving therefrom.
The transferases and/or oxidoreductases of the invention can be used or formulated alone or as mixture (a “cocktail”) of transferases and/or oxidoreductases, and other hydrolytic enzymes such as cellulases, mannanases, proteases, lipases, amylases, or redox enzymes such as laccases, peroxidases, catalases, oxidases, or reductases. They can be used formulated in a solid form such as a powder, a lyophilized preparation, a granule, a tablet, a bar, a crystal, a capsule, a pill, a pellet, or in a liquid form such as in an aqueous solution, an aerosol, a gel, a paste, a slurry, an aqueous/oil emulsion, a cream, a capsule, or in a vesicular or micellar suspension. The formulations of the invention can comprise any or a combination of the following ingredients: polyols such as a polyethylene glycol, a polyvinylalcohol, a glycerol, a sugar such as a sucrose, a sorbitol, a trehalose, a glucose, a fructose, a maltose, a mannose, a gelling agent such as a guar gum, a carageenan, an alginate, a dextrans, a cellulosic derivative, a pectin, a salt such as a sodium chloride, a sodium sulfate, an ammonium sulfate, a calcium chloride, a magnesium chloride, a zinc chloride, a zinc sulfate, a salt of a fatty acid and a fatty acid derivative, a metal chelator such as an EDTA, an EGTA, a sodium citrate, an antimicrobial agent such as a fatty acid or a fatty acid derivative, a paraben, a sorbate, a benzoate, an additional modulating compound to block the impact of an enzyme such as a protease, a bulk proteins such as a BSA, a wheat hydrolysate, a borate compound, an amino acid or a peptide, an appropriate pH or temperature modulating compound, an emulsifier such as a non-ionic and/or an ionic detergent, a redox agent such as a cystine/cysteine, a glutathione, an oxidized glutathione, a reduced or an antioxidant compound such as an ascorbic acid, or a dispersant. Cross-linking and protein modification such as pegylation, fatty acid modification, glycosylation can also be used to improve enzyme stability.
The invention provides arrays comprising immobilized polypeptide(s) and/or nucleic acids of the invention, and arrays comprising an immobilized oligonucleotide of the invention. The enzymes, fragments thereof and nucleic acids which encode the enzymes, or probes of the invention, and fragments thereof, can be affixed to a solid support; and these embodiments can be economical and efficient in the use of enzymes and nucleic acids of the invention in industrial, medical, research, pharmaceutical, food and feed and food and feed supplement processing and other applications and processes. For example, a consortium or cocktail of enzymes (or active fragments thereof), which are used in a specific chemical reaction, can be attached to a solid support and dunked into a process vat. The enzymatic reaction can occur. Then, the solid support can be taken out of the vat, along with the enzymes affixed thereto, for repeated use. In one embodiment of the invention, the isolated, synthetic or recombinant nucleic acid is affixed to a solid support. In another embodiment of the invention, the solid support is selected from the group of a gel, a resin, a polymer, a ceramic, a glass, a microelectrode and any combination thereof.
For example, solid supports useful in this invention include gels. Some examples of gels include sepharose, gelatin, glutaraldehyde, chitosan-treated glutaraldehyde, albumin-glutaraldehyde, chitosan-Xanthan, toyopearl gel (polymer gel), alginate, alginate-polylysine, carrageenan, agarose, glyoxyl agarose, magnetic agarose, dextran-agarose, poly(Carbamoyl Sulfonate) hydrogel, BSA-PEG hydrogel, phosphorylated polyvinyl alcohol (PVA), monoaminoethyl-N-aminoethyl (MANA), amino, or any combination thereof. Another solid support useful in the present invention are resins or polymers. Some examples of resins or polymers include cellulose, acrylamide, nylon, rayon, polyester, anion-exchange resin, AMBERLITETM XAD-7, AMBERLITETM XAD-8, AMBERLITETM IRA-94, AMBERLITETM IRC-50, polyvinyl, polyacrylic, polymethacrylate, or any combination thereof. Another type of solid support useful in the present invention is ceramic. Some examples include non-porous ceramic, porous ceramic, SiO2, Al2O3. Another type of solid support useful in the present invention is glass. Some examples include non-porous glass, porus glass, aminopropyl glass or any combination thereof. Another type of solid support which can be used is a mcroelectrode. An example is a polyethyleneimine-coated magnetite. Graphitic particles can be used as a solid support. Another example of a solid support is a cell, such as a red blood cell.
There are many methods which would be known to one of skill in the art for immobilizing enzymes or fragments thereof, or nucleic acids, onto a solid support. Some examples of such methods include electrostatic droplet generation, electrochemical means, via adsorption, via covalent binding, via cross-linking, viA chemical reaction or process, via encapsulation, via entrapment, via calcium alginate, or via poly (2-hydroxyethyl methacrylate). Like methods are described in Methods in Enzymology, Immobilized Enzymes and Cells, Part C. 1987. Academic Press. Edited by S. P. Colowick and N. O. Kaplan. Volume 136; and Immobilization of Enzymes and Cells. 1997. Humana Press. Edited by G. F. Bickerstaff. Series: Methods in Biotechnology, Edited by J. M. Walker.
The invention provides isolated, synthetic or recombinant antibodies that specifically binds to a polypeptide of the invention. The antibody can be a monoclonal or a polyclonal antibody, or is a single chained antibody. The invention provides hybridomas comprising an antibody that specifically binds to a polypeptide of the invention.
The invention provides methods of isolating or identifying a polypeptide with a transferase activity, e.g., a transaminase activity, e.g., a d-amino-acid transferase activity or a ω-transaminase activity, and/or an oxidoreductase activity, e.g., a dehydrogenase activity, e.g., a d-amino-acid dehydrogenase activity comprising the steps of: (a) providing an antibody of the invention; (b) providing a sample comprising polypeptides; and (c) contacting the sample of step (b) with the antibody of step (a) under conditions wherein the antibody can specifically bind to the polypeptide, thereby isolating or identifying a polypeptide having a transferase activity, e.g., a transaminase activity, e.g., a d-amino-acid transferase activity, and/or an oxidoreductase activity, e.g., a dehydrogenase activity, e.g., a d-amino-acid dehydrogenase activity. The invention provides methods of making an anti-transferase, e.g., anti-transaminase, e.g., anti-d-amino-acid transferase, and/or anti-oxidoreductase, e.g., anti-dehydrogenase, e.g., anti-d-amino-acid dehydrogenase antibody comprising administering to a non-human animal a nucleic acid of the invention or a subsequence thereof in an amount sufficient to generate a humoral immune response, thereby making an anti-transferase, e.g., anti-transaminase, e.g., anti-d-amino-acid transferase, and/or anti-oxidoreductase, e.g., anti-dehydrogenase, e.g., anti-d-amino-acid dehydrogenase antibody. The invention provides methods of making an anti-transferase, e.g., anti-transaminase, e.g., anti-d-amino-acid transferase, and/or anti-oxidoreductase, e.g., anti-dehydrogenase, e.g., anti-d-amino-acid dehydrogenase antibody comprising administering to a non-human animal a polypeptide of the invention or a subsequence thereof in an amount sufficient to generate a humoral immune response, thereby making an anti-transferase, e.g., anti-transaminase, e.g., anti-d-amino-acid transferase, and/or anti-oxidoreductase, e.g., anti-dehydrogenase, e.g., anti-d-amino-acid dehydrogenase antibody.
The invention provides methods of producing a recombinant polypeptide comprising the steps of: (a) providing a nucleic acid operably linked to a promoter, wherein the nucleic acid comprises a sequence of the invention; and (b) expressing the nucleic acid of step (a) under conditions that allow expression of the polypeptide, thereby producing a recombinant polypeptide. The method can further comprise transforming a host cell with the nucleic acid of step (a) followed by expressing the nucleic acid of step (a), thereby producing a recombinant polypeptide in a transformed cell.
The invention provides methods for identifying a polypeptide having a transferase activity, e.g., a transaminase activity, e.g., a d-amino-acid transferase activity, and/or an oxidoreductase activity, e.g., a dehydrogenase activity, e.g., a d-amino-acid dehydrogenase activity comprising: (a) providing a polypeptide of the invention; (b) providing a transferase, e.g., a transaminase, e.g., a d-amino-acid transferase, and/or an oxidoreductase, e.g., a dehydrogenase, e.g., a d-amino-acid dehydrogenase substrate; and (c) contacting the polypeptide with the substrate of step (b) and detecting a decrease in the amount of substrate or an increase in the amount of a reaction product, wherein a decrease in the amount of the substrate or an increase in the amount of the reaction product detects a polypeptide having a transferase activity, e.g., a transaminase activity, e.g., a d-amino-acid transferase activity, and/or an oxidoreductase activity, e.g., a dehydrogenase activity, e.g., a d-amino-acid dehydrogenase activity.
The invention provides methods for identifying a transferase, e.g., a transaminase, e.g., a d-amino-acid transferase, and/or an oxidoreductase, e.g., a dehydrogenase, e.g., a d-amino-acid dehydrogenase substrate comprising: (a) providing a polypeptide of the invention; (b) providing a test substrate; and (c) contacting the polypeptide of step (a) with the test substrate of step (b) and detecting a decrease in the amount of substrate or an increase in the amount of reaction product, wherein a decrease in the amount of the substrate or an increase in the amount of a reaction product identifies the test substrate as a transferase, e.g., a transaminase, e.g., a d-amino-acid transferase, and/or an oxidoreductase, e.g., a dehydrogenase, e.g., a d-amino-acid dehydrogenase substrate.
The invention provides methods of determining whether a test compound specifically binds to a polypeptide comprising: (a) expressing a nucleic acid or a vector comprising the nucleic acid under conditions permissive for translation of the nucleic acid to a polypeptide, wherein the nucleic acid has a sequence of the invention; (b) providing a test compound; (c) contacting the polypeptide with the test compound; and (d) determining whether the test compound of step (b) specifically binds to the polypeptide.
The invention provides methods of determining whether a test compound specifically binds to a polypeptide comprising: (a) providing a polypeptide of the invention; (b) providing a test compound; (c) contacting the polypeptide with the test compound; and (d) determining whether the test compound of step (b) specifically binds to the polypeptide.
The invention provides methods for identifying a modulator of a transferase activity, e.g., a transaminase activity, e.g., a d-amino-acid transferase activity, and/or an oxidoreductase activity, e.g., a dehydrogenase activity, e.g., a d-amino-acid dehydrogenase activity comprising: (a) providing a polypeptide of the invention; (b) providing a test compound; (c) contacting the polypeptide of step (a) with the test compound of step (b) and measuring an activity of the transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase, wherein a change in the transferase activity, e.g., transaminase activity, e.g., d-amino-acid transferase activity, and/or oxidoreductase activity, e.g., dehydrogenase activity, e.g., d-amino-acid dehydrogenase activity measured in the presence of the test compound compared to the activity in the absence of the test compound provides a determination that the test compound modulates the transferase activity, e.g., transaminase activity, e.g., d-amino-acid transferase activity, and/or oxidoreductase activity, e.g., dehydrogenase activity, e.g., d-amino-acid dehydrogenase activity. The transferase activity, e.g., transaminase activity, e.g., d-amino-acid transferase activity, and/or oxidoreductase activity, e.g., dehydrogenase activity, e.g., d-amino-acid dehydrogenase activity can be measured by providing a transferase, e.g., a transaminase, e.g., a d-amino-acid transferase, and/or an oxidoreductase, e.g., a dehydrogenase, e.g., a d-amino-acid dehydrogenase substrate and detecting a decrease in the amount of the substrate or an increase in the amount of a reaction product, or, an increase in the amount of the substrate or a decrease in the amount of a reaction product. In one aspect, a decrease in the amount of the substrate or an increase in the amount of the reaction product with the test compound as compared to the amount of substrate or reaction product without the test compound identifies the test compound as an activator of a transferase activity, e.g., a transaminase activity, e.g., a d-amino-acid transferase activity, and/or an oxidoreductase activity, e.g., a dehydrogenase activity, e.g., a d-amino-acid dehydrogenase activity. In one aspect, an increase in the amount of the substrate or a decrease in the amount of the reaction product with the test compound as compared to the amount of substrate or reaction product without the test compound identifies the test compound as an inhibitor of a transferase activity, e.g., a transaminase activity, e.g., a d-amino-acid transferase activity, and/or an oxidoreductase activity, e.g., a dehydrogenase activity, e.g., a d-amino-acid dehydrogenase activity.
The invention provides computer systems comprising a processor and a data storage device wherein said data storage device has stored thereon a polypeptide sequence or a nucleic acid sequence, wherein the polypeptide sequence comprises sequence of the invention, a polypeptide encoded by a nucleic acid of the invention. The computer systems can further comprise a sequence comparison algorithm and a data storage device having at least one reference sequence stored thereon. In another aspect, the sequence comparison algorithm comprises a computer program that indicates polymorphisms. In one aspect, the computer system can further comprise an identifier that identifies one or more features in said sequence. The invention provides computer readable media having stored thereon a polypeptide sequence or a nucleic acid sequence of the invention. The invention provides methods for identifying a feature in a sequence comprising the steps of: (a) reading the sequence using a computer program which identifies one or more features in a sequence, wherein the sequence comprises a polypeptide sequence or a nucleic acid sequence of the invention; and (b) identifying one or more features in the sequence with the computer program. The invention provides methods for comparing a first sequence to a second sequence comprising the steps of: (a) reading the first sequence and the second sequence through use of a computer program which compares sequences, wherein the first sequence comprises a polypeptide sequence or a nucleic acid sequence of the invention; and (b) determining differences between the first sequence and the second sequence with the computer program. The step of determining differences between the first sequence and the second sequence can further comprise the step of identifying polymorphisms. In one aspect, the method can further comprise an identifier that identifies one or more features in a sequence. In another aspect, the method can comprise reading the first sequence using a computer program and identifying one or more features in the sequence.
The invention provides methods for isolating or recovering a nucleic acid encoding a polypeptide having a transferase activity, e.g., a transaminase activity, e.g., a d-amino-acid transferase activity, and/or an oxidoreductase activity, e.g., a dehydrogenase activity, e.g., a d-amino-acid dehydrogenase activity from an environmental sample comprising the steps of: (a) providing an amplification primer sequence pair for amplifying a nucleic acid encoding a polypeptide having a transferase activity, e.g., a transaminase activity, e.g., a d-amino-acid transferase activity, and/or an oxidoreductase activity, e.g., a dehydrogenase activity, e.g., a d-amino-acid dehydrogenase activity, wherein the primer pair is capable of amplifying a nucleic acid of the invention;
(b) isolating a nucleic acid from the environmental sample or treating the environmental sample such that nucleic acid in the sample is accessible for hybridization to the amplification primer pair; and, (c) combining the nucleic acid of step (b) with the amplification primer pair of step (a) and amplifying nucleic acid from the environmental sample, thereby isolating or recovering a nucleic acid encoding a polypeptide having a transferase activity, e.g., a transaminase activity, e.g., a d-amino-acid transferase activity, and/or an oxidoreductase activity, e.g., a dehydrogenase activity, e.g., a d-amino-acid dehydrogenase activity from an environmental sample. One or each member of the amplification primer sequence pair can comprise an oligonucleotide comprising at least about 10 to 50 consecutive bases of a sequence of the invention. In one aspect, the amplification primer sequence pair is an amplification pair of the invention.
The invention provides methods for isolating or recovering a nucleic acid encoding a polypeptide having a transferase activity, e.g., a transaminase activity, e.g., a d-amino-acid transferase activity, and/or an oxidoreductase activity, e.g., a dehydrogenase activity, e.g., a d-amino-acid dehydrogenase activity from an environmental sample comprising the steps of: (a) providing a polynucleotide probe comprising a nucleic acid of the invention or a subsequence thereof; (b) isolating a nucleic acid from the environmental sample or treating the environmental sample such that nucleic acid in the sample is accessible for hybridization to a polynucleotide probe of step (a); (c) combining the isolated, synthetic or recombinant nucleic acid or the treated environmental sample of step (b) with the polynucleotide probe of step (a); and (d) isolating a nucleic acid that specifically hybridizes with the polynucleotide probe of step (a), thereby isolating or recovering a nucleic acid encoding a polypeptide having a transferase activity, e.g., a transaminase activity, e.g., a d-amino-acid transferase activity, and/or an oxidoreductase activity, e.g., a dehydrogenase activity, e.g., a d-amino-acid dehydrogenase activity from an environmental sample. The environmental sample can comprise a water sample, a liquid sample, a soil sample, an air sample or a biological sample. In one aspect, the biological sample can be derived from a bacterial cell, a protozoan cell, an insect cell, a yeast cell, a plant cell, a fungal cell or a mammalian cell.
The invention provides methods of generating a variant of a nucleic acid encoding a polypeptide having a transferase activity, e.g., a transaminase activity, e.g., a d-amino-acid transferase activity, and/or an oxidoreductase activity, e.g., a dehydrogenase activity, e.g., a d-amino-acid dehydrogenase activity comprising the steps of: (a) providing a template nucleic acid comprising a nucleic acid of the invention; and (b) modifying, deleting or adding one or more nucleotides in the template sequence, or a combination thereof, to generate a variant of the template nucleic acid. In one aspect, the method can further comprise expressing the variant nucleic acid to generate a variant transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase polypeptide. The modifications, additions or deletions can be introduced by a method comprising error-prone PCR, shuffling, oligonucleotide-directed mutagenesis, assembly PCR, sexual PCR mutagenesis, in vivo mutagenesis, cassette mutagenesis, recursive ensemble mutagenesis, exponential ensemble mutagenesis, site-specific mutagenesis, gene reassembly (e.g., GeneReassembly, see, e.g., U.S. Pat. No. 6,537,776), Gene Site Saturation Mutagenesis (GSSM), synthetic ligation reassembly (SLR) or a combination thereof. In another aspect, the modifications, additions or deletions are introduced by a method comprising recombination, recursive sequence recombination, phosphothioate-modified DNA mutagenesis, uracil-containing template mutagenesis, gapped duplex mutagenesis, point mismatch repair mutagenesis, repair-deficient host strain mutagenesis, chemical mutagenesis, radiogenic mutagenesis, deletion mutagenesis, restriction-selection mutagenesis, restriction-purification mutagenesis, artificial gene synthesis, ensemble mutagenesis, chimeric nucleic acid multimer creation and a combination thereof.
In one aspect, the method can be iteratively repeated until a transferase, e.g., a transaminase, e.g., a d-amino-acid transferase, and/or an oxidoreductase, e.g., a dehydrogenase, e.g., a d-amino-acid dehydrogenase having an altered or different activity or an altered or different stability from that of a polypeptide encoded by the template nucleic acid is produced. In one aspect, the variant transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase polypeptide is thermotolerant, and retains some activity after being exposed to an elevated temperature. In another aspect, the variant transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase polypeptide has increased glycosylation as compared to the transferase, e.g., the transaminase, e.g., the d-amino-acid transferase, and/or the oxidoreductase, e.g., the dehydrogenase, e.g., the d-amino-acid dehydrogenase encoded by a template nucleic acid. Alternatively, the variant transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase polypeptide has a transferase activity, e.g., a transaminase activity, e.g., a d-amino-acid transferase activity, and/or an oxidoreductase activity, e.g., a dehydrogenase activity, e.g., a d-amino-acid dehydrogenase activity under a high temperature, wherein the transferase, e.g., the transaminase, e.g., the d-amino-acid transferase, and/or the oxidoreductase, e.g., the dehydrogenase, e.g., the d-amino-acid dehydrogenase encoded by the template nucleic acid is not active under the high temperature. In one aspect, the method can be iteratively repeated until a transferase, e.g., a transaminase, e.g., a d-amino-acid transferase, and/or an oxidoreductase, e.g., a dehydrogenase, e.g., a d-amino-acid dehydrogenase coding sequence having an altered codon usage from that of the template nucleic acid is produced. In another aspect, the method can be iteratively repeated until a transferase, e.g., a transaminase, e.g., a d-amino-acid transferase, and/or an oxidoreductase, e.g., a dehydrogenase, e.g., a d-amino-acid dehydrogenase gene having higher or lower level of message expression or stability from that of the template nucleic acid is produced. In another aspect, formulation of the final transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase product enables an increase or modulation of the performance of the transferase, e.g., the transaminase, e.g., the d-amino-acid transferase, and/or the oxidoreductase, e.g., the dehydrogenase, e.g., the d-amino-acid dehydrogenase in the product.
The invention provides methods for modifying codons in a nucleic acid encoding a polypeptide having a transferase activity, e.g., a transaminase activity, e.g., a d-amino-acid transferase activity, and/or an oxidoreductase activity, e.g., a dehydrogenase activity, e.g., a d-amino-acid dehydrogenase activity to increase its expression in a host cell, the method comprising: (a) providing a nucleic acid of the invention encoding a polypeptide having a transferase activity, e.g., a transaminase activity, e.g., a d-amino-acid transferase activity, and/or an oxidoreductase activity, e.g., a dehydrogenase activity, e.g., a d-amino-acid dehydrogenase activity; and, (b) identifying a non-preferred or a less preferred codon in the nucleic acid of step (a) and replacing it with a preferred or neutrally used codon encoding the same amino acid as the replaced codon, wherein a preferred codon is a codon over-represented in coding sequences in genes in the host cell and a non-preferred or less preferred codon is a codon under-represented in coding sequences in genes in the host cell, thereby modifying the nucleic acid to increase its expression in a host cell.
The invention provides methods for modifying codons in a nucleic acid encoding a polypeptide having a transferase activity, e.g., a transaminase activity, e.g., a d-amino-acid transferase activity, and/or an oxidoreductase activity, e.g., a dehydrogenase activity, e.g., a d-amino-acid dehydrogenase activity; the method comprising: (a) providing a nucleic acid of the invention; and, (b) identifying a codon in the nucleic acid of step (a) and replacing it with a different codon encoding the same amino acid as the replaced codon, thereby modifying codons in a nucleic acid encoding a transferase, e.g., a transaminase, e.g., a d-amino-acid transferase, and/or an oxidoreductase, e.g., a dehydrogenase, e.g., a d-amino-acid dehydrogenase.
The invention provides methods for modifying codons in a nucleic acid encoding a polypeptide having a transferase activity, e.g., a transaminase activity, e.g., a d-amino-acid transferase activity, and/or an oxidoreductase activity, e.g., a dehydrogenase activity, e.g., a d-amino-acid dehydrogenase activity to increase its expression in a host cell, the method comprising: (a) providing a nucleic acid of the invention encoding a transferase, e.g., a transaminase, e.g., a d-amino-acid transferase, and/or an oxidoreductase, e.g., a dehydrogenase, e.g., a d-amino-acid dehydrogenase polypeptide; and, (b) identifying a non-preferred or a less preferred codon in the nucleic acid of step (a) and replacing it with a preferred or neutrally used codon encoding the same amino acid as the replaced codon, wherein a preferred codon is a codon over-represented in coding sequences in genes in the host cell and a non-preferred or less preferred codon is a codon under-represented in coding sequences in genes in the host cell, thereby modifying the nucleic acid to increase its expression in a host cell.
The invention provides methods for modifying a codon in a nucleic acid encoding a polypeptide having a transferase activity, e.g., a transaminase activity, e.g., a d-amino-acid transferase activity, and/or an oxidoreductase activity, e.g., a dehydrogenase activity, e.g., a d-amino-acid dehydrogenase activity to decrease its expression in a host cell, the method comprising: (a) providing a nucleic acid of the invention; and (b) identifying at least one preferred codon in the nucleic acid of step (a) and replacing it with a non-preferred or less preferred codon encoding the same amino acid as the replaced codon, wherein a preferred codon is a codon over-represented in coding sequences in genes in a host cell and a non-preferred or less preferred codon is a codon under-represented in coding sequences in genes in the host cell, thereby modifying the nucleic acid to decrease its expression in a host cell. In one aspect, the host cell can be a bacterial cell, a fungal cell, an insect cell, a yeast cell, a plant cell or a mammalian cell.
The invention provides methods for producing a library of nucleic acids encoding a plurality of modified transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase active sites or substrate binding sites, wherein the modified active sites or substrate binding sites are derived from a first nucleic acid comprising a sequence encoding a first active site or a first substrate binding site the method comprising: (a) providing a first nucleic acid encoding a first active site or first substrate binding site, wherein the first nucleic acid sequence comprises a sequence that hybridizes under stringent conditions to a sequence of the invention, or a subsequence thereof, and the nucleic acid encodes a transferase, e.g., a transaminase, e.g., a d-amino-acid transferase, and/or an oxidoreductase, e.g., a dehydrogenase, e.g., a d-amino-acid dehydrogenase active site or a transferase, e.g., a transaminase, e.g., a d-amino-acid transferase, and/or an oxidoreductase, e.g., a dehydrogenase, e.g., a d-amino-acid dehydrogenase substrate binding site; (b) providing a set of mutagenic oligonucleotides that encode naturally-occurring amino acid variants at a plurality of targeted codons in the first nucleic acid; and, (c) using the set of mutagenic oligonucleotides to generate a set of active site-encoding or substrate binding site-encoding variant nucleic acids encoding a range of amino acid variations at each amino acid codon that was mutagenized, thereby producing a library of nucleic acids encoding a plurality of modified transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase active sites or substrate binding sites. In one aspect, the method comprises mutagenizing the first nucleic acid of step (a) by a method comprising an optimized directed evolution system, Gene Site Saturation Mutagenesis (GSSM), or a synthetic ligation reassembly (SLR). In one aspect, the method comprises mutagenizing the first nucleic acid of step (a) or variants by a method comprising error-prone PCR, shuffling, oligonucleotide-directed mutagenesis, assembly PCR, sexual PCR mutagenesis, in vivo mutagenesis, cassette mutagenesis, recursive ensemble mutagenesis, exponential ensemble mutagenesis, site-specific mutagenesis, gene reassembly (GeneReassembly, U.S. Pat. No. 6,537,776), Gene Site Saturation Mutagenesis (GSSM), synthetic ligation reassembly (SLR) and a combination thereof. In one aspect, the method comprises mutagenizing the first nucleic acid of step (a) or variants by a method comprising recombination, recursive sequence recombination, phosphothioate-modified DNA mutagenesis, uracil-containing template mutagenesis, gapped duplex mutagenesis, point mismatch repair mutagenesis, repair-deficient host strain mutagenesis, chemical mutagenesis, radiogenic mutagenesis, deletion mutagenesis, restriction-selection mutagenesis, restriction-purification mutagenesis, artificial gene synthesis, ensemble mutagenesis, chimeric nucleic acid multimer creation and a combination thereof.
The invention provides methods for making a small molecule comprising: (a) providing a plurality of biosynthetic enzymes capable of synthesizing or modifying a small molecule, wherein one of the enzymes comprises a transferase, e.g., a transaminase, e.g., a d-amino-acid transferase, and/or an oxidoreductase, e.g., a dehydrogenase, e.g., a d-amino-acid dehydrogenase enzyme encoded by a nucleic acid of the invention; (b) providing a substrate for at least one of the enzymes of step (a); and (c) reacting the substrate of step (b) with the enzymes under conditions that facilitate a plurality of biocatalytic reactions to generate a small molecule by a series of biocatalytic reactions. The invention provides methods for modifying a small molecule comprising: (a) providing a transferase, e.g., a transaminase, e.g., a d-amino-acid transferase, and/or an oxidoreductase, e.g., a dehydrogenase, e.g., a d-amino-acid dehydrogenase enzyme, wherein the enzyme comprises a polypeptide of the invention, or, a polypeptide encoded by a nucleic acid of the invention, or a subsequence thereof; (b) providing a small molecule; and (c) reacting the enzyme of step (a) with the small molecule of step (b) under conditions that facilitate an enzymatic reaction catalyzed by the transferase, e.g., the transaminase, e.g., the d-amino-acid transferase, and/or the oxidoreductase, e.g., the dehydrogenase, e.g., the d-amino-acid dehydrogenase enzyme, thereby modifying a small molecule by a transferase, e.g., a transaminase, e.g., a d-amino-acid transferase, and/or an oxidoreductase, e.g., a dehydrogenase, e.g., a d-amino-acid dehydrogenase enzymatic reaction. In one aspect, the method can comprise a plurality of small molecule substrates for the enzyme of step (a), thereby generating a library of modified small molecules produced by at least one enzymatic reaction catalyzed by the transferase, e.g., the transaminase, e.g., the d-amino-acid transferase, and/or the oxidoreductase, e.g., the dehydrogenase, e.g., the d-amino-acid dehydrogenase enzyme. In one aspect, the method can comprise a plurality of additional enzymes under conditions that facilitate a plurality of biocatalytic reactions by the enzymes to form a library of modified small molecules produced by the plurality of enzymatic reactions. In another aspect, the method can further comprise the step of testing the library to determine if a particular modified small molecule that exhibits a desired activity is present within the library. The step of testing the library can further comprise the steps of systematically eliminating all but one of the biocatalytic reactions used to produce a portion of the plurality of the modified small molecules within the library by testing the portion of the modified small molecule for the presence or absence of the particular modified small molecule with a desired activity, and identifying at least one specific biocatalytic reaction that produces the particular modified small molecule of desired activity.
The invention provides methods for determining a functional fragment of a transferase, e.g., a transaminase, e.g., a d-amino-acid transferase, and/or an oxidoreductase, e.g., a dehydrogenase, e.g., a d-amino-acid dehydrogenase enzyme comprising the steps of: (a) providing a transferase, e.g., a transaminase, e.g., a d-amino-acid transferase, and/or an oxidoreductase, e.g., a dehydrogenase, e.g., a d-amino-acid dehydrogenase enzyme, wherein the enzyme comprises a polypeptide of the invention, or a polypeptide encoded by a nucleic acid of the invention, or a subsequence thereof; and (b) deleting a plurality of amino acid residues from the sequence of step (a) and testing the remaining subsequence for a transferase activity, e.g., a transaminase activity, e.g., a d-amino-acid transferase activity, and/or an oxidoreductase activity, e.g., a dehydrogenase activity, e.g., a d-amino-acid dehydrogenase activity, thereby determining a functional fragment of a transferase, e.g., a transaminase, e.g., a d-amino-acid transferase, and/or an oxidoreductase, e.g., a dehydrogenase, e.g., a d-amino-acid dehydrogenase enzyme. In one aspect, the transferase activity, e.g., transaminase activity, e.g., d-amino-acid transferase activity, and/or oxidoreductase activity, e.g., dehydrogenase activity, e.g., d-amino-acid dehydrogenase activity is measured by providing a transferase, e.g., a transaminase, e.g., a d-amino-acid transferase, and/or an oxidoreductase, e.g., a dehydrogenase, e.g., a d-amino-acid dehydrogenase substrate and detecting a decrease in the amount of the substrate or an increase in the amount of a reaction product.
The invention provides methods for whole cell engineering of new or modified phenotypes by using real-time metabolic flux analysis, the method comprising: (a) making a modified cell by modifying the genetic composition of a cell, wherein the genetic composition is modified by addition to the cell of a nucleic acid of the invention; (b) culturing the modified cell to generate a plurality of modified cells; (c) measuring at least one metabolic parameter of the cell by monitoring the cell culture of step (b) in real time; and, (d) analyzing the data of step (c) to determine if the measured parameter differs from a comparable measurement in an unmodified cell under similar conditions, thereby identifying an engineered phenotype in the cell using real-time metabolic flux analysis. In one aspect, the genetic composition of the cell can be modified by a method comprising deletion of a sequence or modification of a sequence in the cell, or, knocking out the expression of a gene. In one aspect, the method can further comprise selecting a cell comprising a newly engineered phenotype. In another aspect, the method can comprise culturing the selected cell, thereby generating a new cell strain comprising a newly engineered phenotype.
The invention provides isolated, synthetic or recombinant signal sequences consisting of, or comprising, a sequence as set forth in residues 1 to 12, 1 to 13, 1 to 14, 1 to 15, 1 to 16, 1 to 17, 1 to 18, 1 to 19, 1 to 20, 1 to 21, 1 to 22, 1 to 23, 1 to 24, 1 to 25, 1 to 26, 1 to 27, 1 to 28, 1 to 28, 1 to 30, 1 to 31, 1 to 32, 1 to 33, 1 to 34, 1 to 35, 1 to 36, 1 to 37, 1 to 38, 1 to 40, 1 to 41, 1 to 42, 1 to 43 or 1 to 44, of a polypeptide of the invention, including exemplary polypeptide sequences of the invention.
The invention provides chimeric polypeptides comprising at least a first domain comprising a signal peptide (SP) and at least a second domain comprising a heterologous polypeptide or peptide comprising a sequence of the invention, or a subsequence thereof, wherein the heterologous polypeptide or peptide is not naturally associated with the signal peptide (SP). In one aspect, the signal peptide (SP) is not derived from a transferase, e.g., a transaminase, e.g., a d-amino-acid transferase, and/or an oxidoreductase, e.g., a dehydrogenase, e.g., a d-amino-acid dehydrogenase. The heterologous polypeptide or peptide can be amino terminal to, carboxy terminal to or on both ends of the signal peptide (SP) or a transferase, e.g., a transaminase, e.g., a d-amino-acid transferase, and/or an oxidoreductase, e.g., a dehydrogenase, e.g., a d-amino-acid dehydrogenase catalytic domain (CD). The invention provides isolated, synthetic or recombinant nucleic acids encoding a chimeric polypeptide, wherein the chimeric polypeptide comprises at least a first domain comprising signal peptide (SP) and at least a second domain comprising a heterologous polypeptide or peptide comprising a sequence of the invention, or a subsequence thereof, wherein the heterologous polypeptide or peptide is not naturally associated with the signal peptide (SP).
The invention provides methods of increasing thermotolerance or thermostability of a transferase, e.g., a transaminase, e.g., a d-amino-acid transferase, and/or an oxidoreductase, e.g., a dehydrogenase, e.g., a d-amino-acid dehydrogenase polypeptide, the method comprising glycosylating a transferase, e.g., a transaminase, e.g., a d-amino-acid transferase, and/or an oxidoreductase, e.g., a dehydrogenase, e.g., a d-amino-acid dehydrogenase polypeptide, wherein the polypeptide comprises at least thirty contiguous amino acids of a polypeptide of the invention; or a polypeptide encoded by a nucleic acid sequence of the invention, thereby increasing the thermotolerance or thermostability of the transferase, e.g., the transaminase, e.g., the d-amino-acid transferase, and/or the oxidoreductase, e.g., the dehydrogenase, e.g., the d-amino-acid dehydrogenasepolypeptide. In one aspect, the transferase, e.g., the transaminase, e.g., the d-amino-acid transferase, and/or the oxidoreductase, e.g., the dehydrogenase, e.g., the d-amino-acid dehydrogenasespecific activity can be thermostable or thermotolerant at a temperature in the range from greater than about 0° C. to about 20° C., about 20° C. to about 37° C., about 37° C. to about 50° C., about 50° C. to about 70° C., about 70° C. to about 75° C., about 75° C. to about 80° C., about 80° C. to about 85° C., about 85° C. to about 90° C., about 90° C. to about 95° C., about 95° C. to about 100° C., about 100° C. to about 110° C., or higher.
The invention provides methods for overexpressing a recombinant transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase polypeptide in a cell comprising expressing a vector comprising a nucleic acid comprising a nucleic acid of the invention or a nucleic acid sequence of the invention, wherein the sequence identities are determined by analysis with a sequence comparison algorithm or by visual inspection, wherein overexpression is effected by use of a high activity promoter, a dicistronic vector or by gene amplification of the vector.
The invention provides methods of making a transgenic plant and seeds comprising: (a) introducing a heterologous nucleic acid sequence into the cell, wherein the heterologous nucleic sequence comprises a nucleic acid sequence of the invention, thereby producing a transformed plant or seed cell; and (b) producing a transgenic plant from the transformed cell or seed. In one aspect, the step (a) can further comprise introducing the heterologous nucleic acid sequence by electroporation or microinjection of plant cell protoplasts. In another aspect, the step (a) can further comprise introducing the heterologous nucleic acid sequence directly to plant tissue by DNA particle bombardment. Alternatively, the step (a) can further comprise introducing the heterologous nucleic acid sequence into the plant cell DNA using an Agrobacterium tumefaciens host. In one aspect, the plant cell can be a potato, corn, rice, wheat, tobacco, or barley cell.
The invention provides methods of expressing a heterologous nucleic acid sequence in a plant cell comprising: (a) transforming the plant cell with a heterologous nucleic acid sequence operably linked to a promoter, wherein the heterologous nucleic sequence comprises a nucleic acid of the invention; (b) growing the plant under conditions wherein the heterologous nucleic acids sequence is expressed in the plant cell. The invention provides methods of expressing a heterologous nucleic acid sequence in a plant cell comprising: (a) transforming the plant cell with a heterologous nucleic acid sequence operably linked to a promoter, wherein the heterologous nucleic sequence comprises a sequence of the invention; (b) growing the plant under conditions wherein the heterologous nucleic acids sequence is expressed in the plant cell.
The invention provides detergent compositions comprising a polypeptide of the invention, or a polypeptide encoded by a nucleic acid of the invention, wherein the polypeptide has a transferase activity, e.g., a transaminase activity, e.g., a d-amino-acid transferase activity, and/or an oxidoreductase activity, e.g., a dehydrogenase activity, e.g., a d-amino-acid dehydrogenase activity. The transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase can be nonsurface-active or surface-active. The transferase, e.g., the transaminase, e.g., the d-amino-acid transferase, and/or the oxidoreductase, e.g., the dehydrogenase, e.g., the d-amino-acid dehydrogenase can be formulated in a non-aqueous liquid composition, a cast solid, a granular form, a particulate form, a compressed tablet, a gel form, a paste or a slurry form. The invention provides methods for washing an object comprising: (a) providing a composition comprising a polypeptide of the invention having a transferase activity, e.g., a transaminase activity, e.g., a d-amino-acid transferase activity, and/or an oxidoreductase activity, e.g., a dehydrogenase activity, e.g., a d-amino-acid dehydrogenase activity, or a polypeptide encoded by a nucleic acid of the invention; (b) providing an object; and (c) contacting the polypeptide of step (a) and the object of step (b) under conditions wherein the composition can wash the object.
The invention provides textiles or fabrics, including, e.g., threads, comprising a polypeptide of the invention, or a polypeptide encoded by a nucleic acid of the invention. The invention provides methods for treating a textile or fabric (e.g., removing a stain from a composition) comprising: (a) providing a composition comprising a polypeptide of the invention having a transferase activity, e.g., a transaminase activity, e.g., a d-amino-acid transferase activity, and/or an oxidoreductase activity, e.g., a dehydrogenase activity, e.g., a d-amino-acid dehydrogenase activity, or a polypeptide encoded by a nucleic acid of the invention; (b) providing a textile or fabric; and (c) contacting the polypeptide of step (a) and the composition of step (b) under conditions wherein the transferase, e.g., the transaminase, e.g., the d-amino-acid transferase, and/or the oxidoreductase, e.g., the dehydrogenase, e.g., the d-amino-acid dehydrogenase can treat the textile or fabric (e.g., remove the stain). The invention provides methods for improving the finish of a fabric comprising: (a) providing a composition comprising a polypeptide of the invention having a transferase activity, e.g., a transaminase activity, e.g., a d-amino-acid transferase activity, and/or an oxidoreductase activity, e.g., a dehydrogenase activity, e.g., a d-amino-acid dehydrogenase activity, or a polypeptide encoded by a nucleic acid of the invention; (b) providing a fabric; and (c) contacting the polypeptide of step (a) and the fabric of step (b) under conditions wherein the polypeptide can treat the fabric thereby improving the finish of the fabric. In one aspect, the fabric is a wool or a silk. In another aspect, the fabric is a cellulosic fiber or a blend of a natural fiber and a synthetic fiber.
The invention provides feeds, foods, feed supplements, food supplements, dietary compositions or dietary aids comprising a polypeptide of the invention, or a polypeptide encoded by a nucleic acid of the invention. The food or the feed can be, e.g., a cereal, a grain, a corn and the like.
The invention provides dough, bread or baked products and/or dough, bread or baked product precursors comprising a polypeptide having a transferase activity, e.g., a transaminase activity, e.g., a d-amino-acid transferase activity, and/or an oxidoreductase activity, e.g., a dehydrogenase activity, e.g., a d-amino-acid dehydrogenase activity, wherein the polypeptide comprises a sequence of the invention, or the polypeptide is encoded by a nucleic acid comprising a sequence of the invention, or an enzymatically active fragment thereof.
The invention provides beverages and beverage precursors comprising a polypeptide, or an enzymatically active fragment thereof, having a transferase activity, e.g., a transaminase activity, e.g., a d-amino-acid transferase activity, and/or an oxidoreductase activity, e.g., a dehydrogenase activity, e.g., a d-amino-acid dehydrogenase activity, wherein the polypeptide comprises a sequence of the invention, or the polypeptide is encoded by a nucleic acid comprising a sequence of the invention. The invention provides methods of beverage production comprising administration of at least one polypeptide having a transferase activity, e.g., a transaminase activity, e.g., a d-amino-acid transferase activity, and/or an oxidoreductase activity, e.g., a dehydrogenase activity, e.g., a d-amino-acid dehydrogenase activity, wherein the polypeptide comprises a sequence of the invention, or the polypeptide is encoded by a nucleic acid comprising a sequence of the invention, or an enzymatically active fragment thereof, to a beverage or a beverage precursor, wherein in one aspect (optionally) the beverage or beverage precursor is a wort or a beer.
The invention provides food, feed or nutritional supplements, e.g. for a human or an animal comprising a polypeptide of the invention, e.g., a polypeptide encoded by the nucleic acid of the invention. In one aspect, the polypeptide in the food or nutritional supplement can be glycosylated. The invention provides edible enzyme delivery matrices comprising a polypeptide of the invention, e.g., a polypeptide encoded by the nucleic acid of the invention. In one aspect, the delivery matrix comprises a pellet. In one aspect, the polypeptide can be glycosylated. In one aspect, the transferase activity, e.g., transaminase activity, e.g., d-amino-acid transferase activity, and/or oxidoreductase activity, e.g., dehydrogenase activity, e.g., d-amino-acid dehydrogenase activity is thermotolerant. In another aspect, the transferase activity, e.g., transaminase activity, e.g., d-amino-acid transferase activity, and/or oxidoreductase activity, e.g., dehydrogenase activity, e.g., d-amino-acid dehydrogenase activity is thermostable.
In one aspect, the transferase, e.g., the transaminase, e.g., the d-amino-acid transferase, and/or the oxidoreductase, e.g., the dehydrogenase, e.g., the d-amino-acid dehydrogenase enzyme can be prepared by expression of a polynucleotide encoding the transferase, e.g., the transaminase, e.g., the d-amino-acid transferase, and/or the oxidoreductase, e.g., the dehydrogenase, e.g., the d-amino-acid dehydrogenase in an organism selected from the group consisting of a bacterium, a yeast, a plant, an insect, a fungus and an animal. The organism can be selected from the group consisting of an S. pombe, S. cerevisiae, Pichia pastoris, Pseudomonas sp., E. coli, Streptomyces sp., Bacillus sp. and Lactobacillus sp.
The invention provides edible enzyme delivery matrix comprising a thermostable recombinant transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase enzyme, e.g., a polypeptide of the invention. The invention provides methods for delivering a transferase, e.g., a transaminase, e.g., a d-amino-acid transferase, and/or an oxidoreductase, e.g., a dehydrogenase, e.g., a d-amino-acid dehydrogenase supplement to an animal, the method comprising: preparing an edible enzyme delivery matrix in the form of pellets comprising a granulate edible carrier and a thermostable recombinant transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase enzyme, wherein the pellets readily disperse the transferase, e.g., the transaminase, e.g., the d-amino-acid transferase, and/or the oxidoreductase, e.g., the dehydrogenase, e.g., the d-amino-acid dehydrogenase enzyme contained therein into aqueous media, and administering the edible enzyme delivery matrix to the animal. The recombinant transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase enzyme can comprise a polypeptide of the invention. The granulate edible carrier can comprise a carrier selected from the group consisting of a grain germ, a grain germ that is spent of oil, a hay, an alfalfa, a timothy, a soy hull, a sunflower seed meal and a wheat midd. The edible carrier can comprise grain germ that is spent of oil. The transferase, e.g., the transaminase, e.g., the d-amino-acid transferase, and/or the oxidoreductase, e.g., the dehydrogenase, e.g., the d-amino-acid dehydrogenase enzyme can be glycosylated to provide thermostability at pelletizing conditions. The delivery matrix can be formed by pelletizing a mixture comprising a grain germ and a transferase, e.g., a transaminase, e.g., a d-amino-acid transferase, and/or an oxidoreductase, e.g., a dehydrogenase, e.g., a d-amino-acid dehydrogenase. The pelletizing conditions can include application of steam. The pelletizing conditions can comprise application of a temperature in excess of about 80° C. for about 5 minutes and the enzyme retains a specific activity of at least 350 to about 900 units per milligram of enzyme.
The invention provides methods for treating, e.g. improving texture and flavor of a dairy product comprising: (a) providing a polypeptide of the invention having a transferase activity, e.g., a transaminase activity, e.g., a d-amino-acid transferase activity, and/or an oxidoreductase activity, e.g., a dehydrogenase activity, e.g., a d-amino-acid dehydrogenase activity, or a transferase, e.g., a transaminase, e.g., a d-amino-acid transferase, and/or an oxidoreductase, e.g., a dehydrogenase, e.g., a d-amino-acid dehydrogenase encoded by a nucleic acid of the invention; (b) providing a dairy product; and (c) contacting the polypeptide of step (a) and the dairy product of step (b) under conditions wherein the transferase, e.g., the transaminase, e.g., the d-amino-acid transferase, and/or the oxidoreductase, e.g., the dehydrogenase, e.g., the d-amino-acid dehydrogenase can treat, e.g. improve the texture or flavor of the dairy product. In one aspect, the dairy product comprises a cheese or a yogurt. The invention provides dairy products comprising a transferase, e.g., a transaminase, e.g., a d-amino-acid transferase, and/or an oxidoreductase, e.g., a dehydrogenase, e.g., a d-amino-acid dehydrogenase of the invention, or is encoded by a nucleic acid of the invention.
The invention provides methods for improving the extraction of oil from an oil-rich plant material comprising: (a) providing a polypeptide of the invention having a transferase activity, e.g., a transaminase activity, e.g., a d-amino-acid transferase activity, and/or an oxidoreductase activity, e.g., a dehydrogenase activity, e.g., a d-amino-acid dehydrogenase activity, or a transferase, e.g., a transaminase, e.g., a d-amino-acid transferase, and/or an oxidoreductase, e.g., a dehydrogenase, e.g., a d-amino-acid dehydrogenase encoded by a nucleic acid of the invention; (b) providing an oil-rich plant material; and (c) contacting the polypeptide of step (a) and the oil-rich plant material. In one aspect, the oil-rich plant material comprises an oil-rich seed. The oil can be a soybean oil, an olive oil, a rapeseed (canola) oil or a sunflower oil.
The invention provides methods for preparing a fruit or vegetable juice, syrup, puree or extract comprising: (a) providing a polypeptide of the invention having a transferase activity, e.g., a transaminase activity, e.g., a d-amino-acid transferase activity, and/or an oxidoreductase activity, e.g., a dehydrogenase activity, e.g., a d-amino-acid dehydrogenase activity, or a transferase, e.g., a transaminase, e.g., a d-amino-acid transferase, and/or an oxidoreductase, e.g., a dehydrogenase, e.g., a d-amino-acid dehydrogenase encoded by a nucleic acid of the invention; (b) providing a composition or a liquid comprising a fruit or vegetable material; and (c) contacting the polypeptide of step (a) and the composition, thereby preparing the fruit or vegetable juice, syrup, puree or extract.
The invention provides methods for treating a wood, a wood product, a paper, a paper product, a pulp, a pulp product, a paper waste or a paper recycling composition comprising: (a) providing a polypeptide of the invention having a transferase activity, e.g., a transaminase activity, e.g., a d-amino-acid transferase activity, and/or an oxidoreductase activity, e.g., a dehydrogenase activity, e.g., a d-amino-acid dehydrogenase activity, or a transferase, e.g., a transaminase, e.g., a d-amino-acid transferase, and/or an oxidoreductase, e.g., a dehydrogenase, e.g., a d-amino-acid dehydrogenase encoded by a nucleic acid of the invention; (b) providing a composition comprising a wood, a wood product, a paper, a paper product, a pulp, a pulp product, a paper waste or a paper recycling composition; and (c) contacting the polypeptide of step (a) and the composition, thereby treating the wood, wood product, paper, paper product, pulp, pulp product, paper waste or paper recycling composition. In one aspect of the invention, the treatment comprises reducing or solubilizing lignin (delignification), bleaching or decoloring, and/or deinking.
The invention provides papers or paper products or paper pulp comprising a transferase, e.g., a transaminase, e.g., a d-amino-acid transferase, and/or an oxidoreductase, e.g., a dehydrogenase, e.g., a d-amino-acid dehydrogenase of the invention, or a polypeptide encoded by a nucleic acid of the invention. The invention provides methods for treating a paper or a paper or wood pulp comprising: (a) providing a polypeptide of the invention having a transferase activity, e.g., a transaminase activity, e.g., a d-amino-acid transferase activity, and/or an oxidoreductase activity, e.g., a dehydrogenase activity, e.g., a d-amino-acid dehydrogenase activity, or a transferase, e.g., a transaminase, e.g., a d-amino-acid transferase, and/or an oxidoreductase, e.g., a dehydrogenase, e.g., a d-amino-acid dehydrogenase encoded by a nucleic acid of the invention; (b) providing a composition comprising a paper or a paper or wood pulp; and (c) contacting the polypeptide of step (a) and the composition of step (b) under conditions wherein the transferase, e.g., the transaminase, e.g., the d-amino-acid transferase, and/or the oxidoreductase, e.g., the dehydrogenase, e.g., the d-amino-acid dehydrogenase can treat the paper or paper or wood pulp.
The invention provides methods for bleaching a thread, fabric, yarn, cloth or textile comprising contacting the fabric, yarn, cloth or textile with a transferase, e.g., a transaminase, e.g., a d-amino-acid transferase, and/or an oxidoreductase, e.g., a dehydrogenase, e.g., a d-amino-acid dehydrogenase under conditions suitable to produce a whitening of the textile, wherein the transferase, e.g., the transaminase, e.g., the d-amino-acid transferase, and/or the oxidoreductase, e.g., the dehydrogenase, e.g., the d-amino-acid dehydrogenase comprises a polypeptide of the invention, or an enzymatically active fragment thereof. The thread, fabric, yarn, cloth or textile can comprise a non-cotton cellulosic thread, fabric, yarn, cloth or textile. The invention provides fabrics, yarns, cloths or textiles comprising a polypeptide having a sequence of the invention, or a polypeptide encoded by a nucleic acid comprising a sequence of the invention, or an enzymatically active fragment thereof, wherein in one aspect (optionally) the fabric, yarn, cloth or textile comprises a non-cotton cellulosic fabric, yarn, cloth or textile.
The invention provides wood, wood chips, wood pulp, wood products, paper pulps, paper products, newspapers or paper waste comprising a polypeptide of the invention, or an enzymatically active fragment thereof. The invention provides thread, fabric, yarn, cloth or textile comprising a polypeptide of the invention, or an enzymatically active fragment thereof.
The invention provides methods for making ethanol comprising contacting an organic material, e.g. a biomass, with a polypeptide having a transferase activity, e.g., a transaminase activity, e.g., a d-amino-acid transferase activity, and/or an oxidoreductase activity, e.g., a dehydrogenase activity, e.g., a d-amino-acid dehydrogenase activity, wherein the polypeptide has a sequence of the invention, or the polypeptide is encoded by a nucleic acid comprising a sequence of the invention, or an enzymatically active fragment thereof. The invention provides compositions comprising an ethanol and a polypeptide having a transferase activity, e.g., a transaminase activity, e.g., a d-amino-acid transferase activity, and/or an oxidoreductase activity, e.g., a dehydrogenase activity, e.g., a d-amino-acid dehydrogenase activity, wherein the polypeptide has a sequence of the invention, or the polypeptide is encoded by a nucleic acid comprising a sequence of the invention, or an enzymatically active fragment thereof. The invention provides methods for making ethanol comprising: (a) providing at least one polypeptide having a transferase activity, e.g., a transaminase activity, e.g., a d-amino-acid transferase activity, and/or an oxidoreductase activity, e.g., a dehydrogenase activity, e.g., a d-amino-acid dehydrogenase activity, or an enzymatically active fragment thereof; (b) providing an organic composition; and (c) contacting the composition of step (b) with the polypeptide of step (a).
The invention provides pharmaceutical compositions comprising a polypeptide having a transferase activity, e.g., a transaminase activity, e.g., a d-amino-acid transferase activity, and/or an oxidoreductase activity, e.g., a dehydrogenase activity, e.g., a d-amino-acid dehydrogenase activity, wherein the polypeptide comprises a sequence of the invention, or the polypeptide is encoded by a nucleic acid comprising a sequence of the invention, or an enzymatically active fragment thereof. In one aspect, the pharmaceutical composition acts as a digestive aid or is used for the diagnosis, tracking or treatment of any condition and/or disease, e.g. liver damage/disease or myocardial infarctions. In one aspect, the treatment is prophylactic.
In one aspect, the invention provides oral care products comprising a polypeptide of the invention having a transferase activity, e.g., a transaminase activity, e.g., a d-amino-acid transferase activity, and/or an oxidoreductase activity, e.g., a dehydrogenase activity, e.g., a d-amino-acid dehydrogenase activity, or a transferase, e.g., a transaminase, e.g., a d-amino-acid transferase, and/or an oxidoreductase, e.g., a dehydrogenase, e.g., a d-amino-acid dehydrogenase encoded by a nucleic acid of the invention. The oral care product can comprise a toothpaste, a dental cream, a gel or a tooth powder, an odontic, a mouth wash, a pre- or post brushing rinse formulation, a chewing gum, a lozenge or a candy. The invention provides contact lens cleaning compositions comprising a polypeptide of the invention having a transferase activity, e.g., a transaminase activity, e.g., a d-amino-acid transferase activity, and/or an oxidoreductase activity, e.g., a dehydrogenase activity, e.g., a d-amino-acid dehydrogenase activity, or a transferase, e.g., a transaminase, e.g., a d-amino-acid transferase, and/or an oxidoreductase, e.g., a dehydrogenase, e.g., a d-amino-acid dehydrogenase encoded by a nucleic acid of the invention.
The invention provides chimeric transferases, e.g., transaminases, e.g., d-amino-acid transferases, and/or oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases comprising a polypeptide sequence of the invention and at least one heterologous binding domain, wherein in one aspect (optionally) the binding domain comprises a NAD, a NAD(P), a calcium, a thiamine, a FAD, a zinc, a DNA and/or a lipoyl binding domain. The invention provides methods for designing a chimeric transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase having a new binding specificity or an enhanced binding specificity, comprising inserting a heterologous or an additional endogenous binding domain into a transferase, e.g., a transaminase, e.g., a d-amino-acid transferase, and/or an oxidoreductase, e.g., a dehydrogenase, e.g., a d-amino-acid dehydrogenase, wherein the binding domain comprises a binding subsequence of a transferase, e.g., a transaminase, e.g., a d-amino-acid transferase, and/or an oxidoreductase, e.g., a dehydrogenase, e.g., a d-amino-acid dehydrogenase sequence of the invention, or alternatively a heterologous binding domain, or an additional endogenous binding domain, is inserted into a transferase, e.g., a transaminase, e.g., a d-amino-acid transferase, and/or an oxidoreductase, e.g., a dehydrogenase, e.g., a d-amino-acid dehydrogenase sequence of the invention.
The invention provides enzyme mixtures, or “cocktails” comprising at least one enzyme of the invention and one or more other enzyme(s), which can be another transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase, or any other enzyme; for example, the “cocktails” of the invention, in addition to at least one enzyme of this invention, can comprise any other enzyme, such as xylanase, cellulases, lipases, esterases, proteases, or endoglycosidases, endo-beta.-1,4-glucanases, beta-glucanases, endo-beta-1,3(4)-glucanases, cutinases, peroxidases, catalases, laccases, amylases, glucoamylases, pectinases, racemases, isomerases, epimerases, dehydrogenases, oxidoreductases, reductases, oxidases, phenoloxidases, ligninases, pullulanases, arabinanases, hemicellulases, mannanases, xyloglucanases, pectin acetyl esterases, rhamnogalacturonan acetyl esterases, polygalacturonases, rhamnogalacturonases, galactanases, pectin lyases, pectin methylesterases, cellobiohydrolases and/or transglutaminases, to name just a few examples. In alternative embodiments, these enzyme mixtures, or “cocktails” comprising at least one enzyme of the invention can be used in any process or method of the invention, or composition of the invention, e.g., in foods or feeds, food or feed supplements, textiles, papers, processed woods, etc. and methods for making them, and in compositions and methods for treating paper, pulp, wood, paper, pulp or wood waste or by-products, and the like, and in the final products thereof.
The invention provides methods of making a pyruvate and/or a D-glutamate comprising (a) providing a D-alanine and a 2-oxoglutarate; (b) providing the polypeptide of the invention; and (c) contacting the polypeptide of (b) with the D-alanine+2-oxoglutarate under conditions wherein the polypeptide catalyzes the reaction D-alanine+2-oxoglutarate<=>pyruvate+D-glutamate.
The invention provides methods of making a 2-oxo acid comprising (i) (a) providing a D-amino acid+H2O+acceptor; (b) providing the transaminase polypeptide of the invention; and (c) contacting the polypeptide of (b) with the D-amino acid+H2O+acceptor, under conditions wherein the polypeptide catalyzes the reaction: D-amino acid+H2O+acceptor<=>a 2-oxo acid+NH3+reduced acceptor; or (ii) the method of (i), wherein the acceptor is a benzoquinone is (iii) the method of (ii) wherein the benzoquinone is a 1,2-benzoquinone or a 1,4-benzoquinone, or ubiquinone, ubidecarenone or coenzyme Q.
The invention provides methods for transferring an amino group from an amino acid to an alpha-keto acid comprising (i) (a) providing an amino acid; (b) providing the transaminase polypeptide of the invention; and (c) contacting the polypeptide of (b) with the amino acid under conditions wherein the polypeptide catalyzes the conversion of the amino acid to an alpha-keto acid; or (ii) the method of (i), wherein the transaminase activity comprises catalyzing the conversion of a racemic amino acid mixture to a substantially optically pure alpha-keto acid.
The invention provides methods for transferring making an amino acid from an alpha-keto acid comprising (i) (a) providing an alpha-keto acid (b) providing the transaminase polypeptide of the invention; and (c) contacting the polypeptide of (b) with the alpha-keto acid under conditions wherein the polypeptide catalyzes the conversion of the alpha-keto acid to an amino acid; (ii) the method of (i), wherein the transaminase activity comprises catalyzing the conversion of a racemic alpha-keto mixture to a substantially optically pure D- or L-amino acid; or (iii) the method of (i) or (ii), wherein oxaloacetate is converted to an aspartate, or α-ketoglutarate is converted to glutarate, or an α-ketoisovalerate is converted to an L-valine; or the transaminase activity is an omega transaminase activity that catalyzes the conversion of isobutylamine to isobutyraldehyde.
The invention provides methods for catalyzing the conversion of an amine to a ketone comprising (i) (a) providing an amine; (b) providing the transaminase polypeptide of the invention; and (c) contacting the polypeptide of (b) with the amine under conditions wherein the polypeptide catalyzes the conversion of an amine to a ketone, wherein the amine is not in or from a tryptophan (with the proviso that the second amino acid is not tryptophan, or with the proviso that the amine is not in or from a tryptophan); (ii) the method of (i), wherein the transaminase activity comprises catalyzing the conversion of a chiral amine to a ketone; or (iii) the method of (i) or (ii), wherein the amine is a ω-amine
The invention provides methods of catalyzing the synthesis of an amino acid comprising (i) (a) providing amino acid and a keto acid, wherein the amino acid is not tryptophan; (b) providing the transaminase polypeptide of the invention; and (c) contacting the polypeptide of (b) with the amino acid and keto acid under conditions wherein a second amino acid and a pyruvate is produced, wherein the second amino acid is not tryptophan (with the proviso that the second amino acid is not tryptophan); or (ii) the method of (i), further comprising reacting the pyruvate with an acetolactate synthase enzyme under conditions appropriate to produce a compound that does not react with transaminase enzyme; (iii) the method of (ii), wherein the compound that does not react with transaminase enzyme is acetolactate or acetoin; or, the first amino acid is alanine or L-aspartate; or, the keto acid is 2-ketobutyrate or tri-methyl pyruvate; or, the second amino acid is 2-aminobutyrate or tert-leucine.
The details of one or more embodiments of the invention are set forth in the accompanying drawings and the description below. Other features, objects, and advantages of the invention will be apparent from the description and drawings, and from the claims.
All publications, patents, patent applications, GenBank sequences and ATCC deposits, cited herein are hereby expressly incorporated by reference for all purposes.



BRIEF DESCRIPTION OF THE DRAWINGS
The following drawings are illustrative of aspects of the invention and are not meant to limit the scope of the invention as encompassed by the claims.
The patent or application file contains at least one drawing executed in color. Copies of this patent or patent application publication with color drawing(s) will be provided by the Office upon request and payment of the necessary fee.
FIG. 1 is a block diagram of a computer system.
FIG. 2 is a flow diagram illustrating one aspect of a process for comparing a new nucleotide or protein sequence with a database of sequences in order to determine the homology levels between the new sequence and the sequences in the database.
FIG. 3 is a flow diagram illustrating one aspect of a process in a computer for determining whether two sequences are homologous.
FIG. 4 is a flow diagram illustrating one aspect of an identifier process 300 for detecting the presence of a feature in a sequence.
FIG. 5 illustrates a comparison of sequences of this invention, showing the consensus regions of the SEQ ID NO:894 like proteins, as highlighted in the figure, as described in detail in Example 9, below.
FIG. 6 illustrates a comparison of the enzyme sequence of this invention SEQ ID NO:910, with other published DATS, and as highlighted in the figure, one can see the residues that make this enzyme unique and may account for its superior activity, as described in detail in Example 10, below.
FIG. 7 illustrates a comparison of related D-aminotransferases and the core sequence motifs they have in common, as described in detail in Example 14, below.
FIG. 8 is a model of 3DAA-D-amino acid aminotransferase, with numbered residues indicating those sites selected for TMCASM evolution, as described in detail in Example 29, below.



Like reference symbols in the various drawings indicate like elements.
DETAILED DESCRIPTION OF THE INVENTION
The invention provides transferases, e.g., transaminases, e.g., d-amino-acid transferases (also referred to as “d-aminotransferases” or “D-ATs” or “DATs”), and/or oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases, and polynucleotides encoding them and methods of making and using them. Transferases, e.g., transaminases, e.g., d-amino-acid transferases, and/or oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases, of the polypeptides of the invention encompasses enzymes having transferase activity, e.g., transaminase activity, e.g., d-amino-acid transferase activity, and/or oxidoreductase activity, e.g., dehydrogenase activity, e.g., d-amino-acid dehydrogenase activity, and/or catalyze the transfer of a chemical group, catalyze transamination, catalyze the reaction: D-alanine+2-oxoglutarate<=>pyruvate+D-glutamate, and/or catalyze an oxidation-reduction reaction, catalyze the removal of hydrogen atoms, and/or catalyze the reaction: D-amino acid+H2O+acceptor<=>a 2-oxo acid+NH3+reduced acceptor. The transferases and/or oxidoreductases of the invention can be used to make and/or process pharmaceutical (drug) compositions, pharmaceutical (drug) precursors and/or intermediates, antibiotics, sweeteners, peptide enzymes, peptide hormones, fuel and fuel additive compositions, foods and food additives, beverage and beverage additives, feeds and feed additives, drugs and drug additives, dietary supplements, textiles, wood, paper, pulp, detergents and the like.
In one aspect, an enzyme of the invention is thermotolerant and/or tolerant of high and/or low pH conditions. For example, in one aspect, a transferase, e.g., a transaminase, e.g., a d-amino-acid transferase, and/or an oxidoreductase, e.g., a dehydrogenase, e.g., a d-amino-acid dehydrogenase of the invention retains activity under conditions comprising a temperature of at least about 80° C., 85° C., 86° C., 87° C., 88° C., 89° C., 90° C., 91° C., 92° C., 93° C., 94° C., 95° C., 96° C., 97° C., 98° C., 99° C., 100° C., 101° C., 102° C., 103° C., 103.5° C., 104° C., 105° C., 107° C., 108° C., 109° C. or 110° C., or more, and a basic pH of at least about pH 11, or more.
The invention provides isolated, synthetic or recombinant nucleic acids comprising a nucleic acid encoding at least one polypeptide having a transferase activity, e.g., a transaminase activity, e.g., a d-amino-acid transferase activity, and/or an oxidoreductase activity, e.g., a dehydrogenase activity, e.g., a d-amino-acid dehydrogenase activity, or other activity as described herein, wherein the nucleic acid comprises a sequence having at least about 50%, 51%, 52%, 53%, 54%, 55%, 56%, 57%, 58%, 59%, 60%, 61%, 62%, 63%, 64%, 65%, 66%, 67%, 68%, 69%, 70%, 71%, 72%, 73%, 74%, 75%, 76%, 77%, 78%, 79%, 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or more, or complete (100%) sequence identity (homology) to SEQ ID NO:1, SEQ ID NO:3, SEQ ID NO:5, SEQ ID NO:7, SEQ ID NO:9, SEQ ID NO:11, SEQ ID NO:13, SEQ ID NO:15, SEQ ID NO:17, SEQ ID NO:19, SEQ ID NO:21, SEQ ID NO:23, SEQ ID NO:25, SEQ ID NO:27, SEQ ID NO:29, SEQ ID NO:31, SEQ ID NO:33, SEQ ID NO:35, SEQ ID NO:37, SEQ ID NO:39, SEQ ID NO:41, SEQ ID NO:43, SEQ ID NO:45, SEQ ID NO:47, SEQ ID NO:49, SEQ ID NO:51, SEQ ID NO:53, SEQ ID NO:55, SEQ ID NO:57, SEQ ID NO:59, SEQ ID NO:61, SEQ ID NO:63, SEQ ID NO:65, SEQ ID NO:67, SEQ ID NO:69, SEQ ID NO:71, SEQ ID NO:73, SEQ ID NO:75, SEQ ID NO:77, SEQ ID NO:79, SEQ ID NO:81, SEQ ID NO:83, SEQ ID NO:85, SEQ ID NO:87, SEQ ID NO:89, SEQ ID NO:91, SEQ ID NO:93, SEQ ID NO:95, SEQ ID NO:97, SEQ ID NO:99, SEQ ID NO:101, SEQ ID NO:103, SEQ ID NO:105, SEQ ID NO:107, SEQ ID NO:109, SEQ ID NO:111, SEQ ID NO:113, SEQ ID NO:115, SEQ ID NO:117, SEQ ID NO:119, SEQ ID NO:121, SEQ ID NO:123, SEQ ID NO:125, SEQ ID NO:127, SEQ ID NO:129, SEQ ID NO:131, SEQ ID NO:133, SEQ ID NO:135, SEQ ID NO:137, SEQ ID NO:139, SEQ ID NO:141, SEQ ID NO:143, SEQ ID NO:145, SEQ ID NO:147, SEQ ID NO:149, SEQ ID NO:151, SEQ ID NO:153, SEQ ID NO:155, SEQ ID NO:157, SEQ ID NO:159, SEQ ID NO:161, SEQ ID NO:163, SEQ ID NO:165, SEQ ID NO:167, SEQ ID NO:169, SEQ ID NO:171, SEQ ID NO:173, SEQ ID NO:175, SEQ ID NO:177, SEQ ID NO:179, SEQ ID NO:181, SEQ ID NO:183, SEQ ID NO:185, SEQ ID NO:187, SEQ ID NO:189, SEQ ID NO:191, SEQ ID NO:193, SEQ ID NO:195, SEQ ID NO:197, SEQ ID NO:199, SEQ ID NO:201, SEQ ID NO:203, SEQ ID NO:205, SEQ ID NO:207, SEQ ID NO:209, SEQ ID NO:211, SEQ ID NO:213, SEQ ID NO:215, SEQ ID NO:217, SEQ ID NO:219, SEQ ID NO:221, SEQ ID NO:223, SEQ ID NO:225, SEQ ID NO:227, SEQ ID NO:229, SEQ ID NO:231, SEQ ID NO:233, SEQ ID NO:235, SEQ ID NO:237, SEQ ID NO:239, SEQ ID NO:241, SEQ ID NO:243, SEQ ID NO:245, SEQ ID NO:247, SEQ ID NO:249, SEQ ID NO:251, SEQ ID NO:253, SEQ ID NO:255, SEQ ID NO:257, SEQ ID NO:259, SEQ ID NO:261, SEQ ID NO:263, SEQ ID NO:265, SEQ ID NO:267, SEQ ID NO:269, SEQ ID NO:271, SEQ ID NO:273, SEQ ID NO:275, SEQ ID NO:277, SEQ ID NO:279, SEQ ID NO:281, SEQ ID NO:283, SEQ ID NO:285, SEQ ID NO:287, SEQ ID NO:289, SEQ ID NO:291, SEQ ID NO:293, SEQ ID NO:295, SEQ ID NO:297, SEQ ID NO:299, SEQ ID NO:301, SEQ ID NO:303, SEQ ID NO:305, SEQ ID NO:307, SEQ ID NO:309, SEQ ID NO:311, SEQ ID NO:313, SEQ ID NO:315, SEQ ID NO:317, SEQ ID NO:319, SEQ ID NO:321, SEQ ID NO:323, SEQ ID NO:325, SEQ ID NO:327, SEQ ID NO:329, SEQ ID NO:331, SEQ ID NO:333, SEQ ID NO:335, SEQ ID NO:337, SEQ ID NO:339, SEQ ID NO:341, SEQ ID NO:343, SEQ ID NO:345, SEQ ID NO:347, SEQ ID NO:349, SEQ ID NO:351, SEQ ID NO:353, SEQ ID NO:355, SEQ ID NO:357, SEQ ID NO:359, SEQ ID NO:361, SEQ ID NO:363, SEQ ID NO:365, SEQ ID NO:367, SEQ ID NO:369, SEQ ID NO:371, SEQ ID NO:373, SEQ ID NO:375, SEQ ID NO:377, SEQ ID NO:379, SEQ ID NO:381, SEQ ID NO:383, SEQ ID NO:385, SEQ ID NO:387, SEQ ID NO:389, SEQ ID NO:391, SEQ ID NO:393, SEQ ID NO:395, SEQ ID NO:397, SEQ ID NO:399, SEQ ID NO:401, SEQ ID NO:403, SEQ ID NO:405, SEQ ID NO:407, SEQ ID NO:409, SEQ ID NO:411, SEQ ID NO:413, SEQ ID NO:415, SEQ ID NO:417, SEQ ID NO:419, SEQ ID NO:421, SEQ ID NO:423, SEQ ID NO:425, SEQ ID NO:427, SEQ ID NO:429, SEQ ID NO:431, SEQ ID NO:433, SEQ ID NO:435, SEQ ID NO:437, SEQ ID NO:439, SEQ ID NO:441, SEQ ID NO:443, SEQ ID NO:445, SEQ ID NO:447, SEQ ID NO:449, SEQ ID NO:451, SEQ ID NO:453, SEQ ID NO:455, SEQ ID NO:457, SEQ ID NO:459, SEQ ID NO:461, SEQ ID NO:463, SEQ ID NO:465, SEQ ID NO:467, SEQ ID NO:469, SEQ ID NO:471, SEQ ID NO:473, SEQ ID NO:475, SEQ ID NO:477, SEQ ID NO:479, SEQ ID NO:481, SEQ ID NO:483, SEQ ID NO:485, SEQ ID NO:487, SEQ ID NO:489, SEQ ID NO:491, SEQ ID NO:493, SEQ ID NO:495, SEQ ID NO:497, SEQ ID NO:499, SEQ ID NO:501, SEQ ID NO:503, SEQ ID NO:505, SEQ ID NO:507, SEQ ID NO:509, SEQ ID NO:511, SEQ ID NO:513, SEQ ID NO:515, SEQ ID NO:517, SEQ ID NO:519, SEQ ID NO:521, SEQ ID NO:523, SEQ ID NO:525, SEQ ID NO:527, SEQ ID NO:529, SEQ ID NO:531, SEQ ID NO:533, SEQ ID NO:535, SEQ ID NO:537, SEQ ID NO:539, SEQ ID NO:541, SEQ ID NO:543, SEQ ID NO:545, SEQ ID NO:547, SEQ ID NO:549, SEQ ID NO:551, SEQ ID NO:553, SEQ ID NO:555, SEQ ID NO:557, SEQ ID NO:559, SEQ ID NO:561, SEQ ID NO:563, SEQ ID NO:565, SEQ ID NO:567, SEQ ID NO:569, SEQ ID NO:571, SEQ ID NO:573, SEQ ID NO:575, SEQ ID NO:577, SEQ ID NO:579, SEQ ID NO:581, SEQ ID NO:583, SEQ ID NO:585, SEQ ID NO:587, SEQ ID NO:589, SEQ ID NO:591, SEQ ID NO:593, SEQ ID NO:595, SEQ ID NO:597, SEQ ID NO:599, SEQ ID NO:601, SEQ ID NO:603, SEQ ID NO:605, SEQ ID NO:607, SEQ ID NO:609, SEQ ID NO:611, SEQ ID NO:613, SEQ ID NO:615, SEQ ID NO:617, SEQ ID NO:619, SEQ ID NO:621, SEQ ID NO:623, SEQ ID NO:625, SEQ ID NO:627, SEQ ID NO:629, SEQ ID NO:631, SEQ ID NO:633, SEQ ID NO:635, SEQ ID NO:637, SEQ ID NO:639, SEQ ID NO:641, SEQ ID NO:643, SEQ ID NO:645, SEQ ID NO:647, SEQ ID NO:649, SEQ ID NO:651, SEQ ID NO:653, SEQ ID NO:655, SEQ ID NO:657, SEQ ID NO:659, SEQ ID NO:661, SEQ ID NO:663, SEQ ID NO:665, SEQ ID NO:667, SEQ ID NO:669, SEQ ID NO:671, SEQ ID NO:673, SEQ ID NO:675, SEQ ID NO:677, SEQ ID NO:679, SEQ ID NO:681, SEQ ID NO:683, SEQ ID NO:685, SEQ ID NO:687, SEQ ID NO:689, SEQ ID NO:691, SEQ ID NO:693, SEQ ID NO:695, SEQ ID NO:697, SEQ ID NO:699, SEQ ID NO:701, SEQ ID NO:703, SEQ ID NO:705, SEQ ID NO:707, SEQ ID NO:709, SEQ ID NO:711, SEQ ID NO:713, SEQ ID NO:715, SEQ ID NO:717, SEQ ID NO:719, SEQ ID NO:721, SEQ ID NO:723, SEQ ID NO:725, SEQ ID NO:727, SEQ ID NO:729, SEQ ID NO:731, SEQ ID NO:733, SEQ ID NO:735, SEQ ID NO:737, SEQ ID NO:739, SEQ ID NO:741, SEQ ID NO:743, SEQ ID NO:745, SEQ ID NO:747, SEQ ID NO:749, SEQ ID NO:751, SEQ ID NO:753, SEQ ID NO:755, SEQ ID NO:757, SEQ ID NO:759, SEQ ID NO:761, SEQ ID NO:763, SEQ ID NO:765, SEQ ID NO:767, SEQ ID NO:769, SEQ ID NO:771, SEQ ID NO:773, SEQ ID NO:775, SEQ ID NO:777, SEQ ID NO:779, SEQ ID NO:781, SEQ ID NO:783, SEQ ID NO:785, SEQ ID NO:787, SEQ ID NO:789, SEQ ID NO:791, SEQ ID NO:793, SEQ ID NO:795, SEQ ID NO:797, SEQ ID NO:799, SEQ ID NO:801, SEQ ID NO:803, SEQ ID NO:805, SEQ ID NO:807, SEQ ID NO:809, SEQ ID NO:811, SEQ ID NO:813, SEQ ID NO:815, SEQ ID NO:817, SEQ ID NO:819, SEQ ID NO:821, SEQ ID NO:823, SEQ ID NO:825, SEQ ID NO:827, SEQ ID NO:829, SEQ ID NO:831, SEQ ID NO:833, SEQ ID NO:835, SEQ ID NO:837, SEQ ID NO:839, SEQ ID NO:841, SEQ ID NO:843, SEQ ID NO:845, SEQ ID NO:847, SEQ ID NO:849, SEQ ID NO:851, SEQ ID NO:853, SEQ ID NO:855, SEQ ID NO:857, SEQ ID NO:859, SEQ ID NO:861, SEQ ID NO:863, SEQ ID NO:865, SEQ ID NO:867, SEQ ID NO:869, SEQ ID NO:871, SEQ ID NO:873, SEQ ID NO:875, SEQ ID NO:877, SEQ ID NO:879, SEQ ID NO:881, SEQ ID NO:883, SEQ ID NO:885, SEQ ID NO:887, SEQ ID NO:889, SEQ ID NO:891, SEQ ID NO:893, SEQ ID NO:895, SEQ ID NO:897, SEQ ID NO:899, SEQ ID NO:901, SEQ ID NO:903, SEQ ID NO:905, SEQ ID NO:907, SEQ ID NO:909, SEQ ID NO:911, SEQ ID NO:913, SEQ ID NO:915, SEQ ID NO:917, SEQ ID NO:919, SEQ ID NO:921, SEQ ID NO:923, SEQ ID NO:925, SEQ ID NO:927, SEQ ID NO:929, SEQ ID NO:931, SEQ ID NO:933, SEQ ID NO:935, SEQ ID NO:937, SEQ ID NO:939, SEQ ID NO:941, SEQ ID NO:943, SEQ ID NO:945, SEQ ID NO:947, SEQ ID NO:949, SEQ ID NO:951, SEQ ID NO:953, SEQ ID NO:955, SEQ ID NO:957, SEQ ID NO:959, SEQ ID NO:961, SEQ ID NO:963, SEQ ID NO:965, SEQ ID NO:967, SEQ ID NO:969, SEQ ID NO:971, SEQ ID NO:973, and/or SEQ ID NO:975, and as described herein and in Tables 1, 2 and 3, and the Sequence Listing (all of these sequences are “exemplary polynucleotides of the invention”), and enzymatically active subsequences (fragments) thereof, over a region of between about 10 to 2500, or more residues, or the full length of a cDNA, transcript (mRNA) or gene. Nucleic acids of the invention includes those encoding a polypeptide of this invention, having at least 50%, 51%, 52%, 53%, 54%, 55%, 56%, 57%, 58%, 59%, 60%, 61%, 62%, 63%, 64%, 65%, 66%, 67%, 68%, 69%, 70%, 71%, 72%, 73%, 74%, 75%, 76%, 77%, 78%, 79%, 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99% or more, or 100% (complete) sequence identity to an exemplary polypeptide of the invention, which includes, e.g., SEQ ID NO:2, SEQ ID NO:4, SEQ ID NO:6, SEQ ID NO:8, SEQ ID NO:10, SEQ ID NO:12, SEQ ID NO:14, SEQ ID NO:16, SEQ ID NO:18, SEQ ID NO:20, SEQ ID NO:22, SEQ ID NO:24, SEQ ID NO:26, SEQ ID NO:28, SEQ ID NO:30, SEQ ID NO:32, SEQ ID NO:34, SEQ ID NO:36, SEQ ID NO:38, SEQ ID NO:40, SEQ ID NO:42, SEQ ID NO:44, SEQ ID NO:46, SEQ ID NO:48, SEQ ID NO:50, SEQ ID NO:52, SEQ ID NO:54, SEQ ID NO:56, SEQ ID NO:58, SEQ ID NO:60, SEQ ID NO:62, SEQ ID NO:64, SEQ ID NO:66, SEQ ID NO:68, SEQ ID NO:70, SEQ ID NO:72, SEQ ID NO:74, SEQ ID NO:76, SEQ ID NO:78, SEQ ID NO:80, SEQ ID NO:82, SEQ ID NO:84, SEQ ID NO:86, SEQ ID NO:88, SEQ ID NO:90, SEQ ID NO:92, SEQ ID NO:94, SEQ ID NO:96, SEQ ID NO:98, SEQ ID NO:100, SEQ ID NO:102, SEQ ID NO:104, SEQ ID NO:106, SEQ ID NO:108, SEQ ID NO:110, SEQ ID NO:112, SEQ ID NO:114, SEQ ID NO:116, SEQ ID NO:118, SEQ ID NO:120, SEQ ID NO:122, SEQ ID NO:124, SEQ ID NO:126, SEQ ID NO:128, SEQ ID NO:130, SEQ ID NO:132, SEQ ID NO:134, SEQ ID NO:136, SEQ ID NO:138, SEQ ID NO:140, SEQ ID NO:142, SEQ ID NO:143, SEQ ID NO:146, SEQ ID NO:148, SEQ ID NO:150, SEQ ID NO:152, SEQ ID NO:154, SEQ ID NO:156, SEQ ID NO:158, SEQ ID NO:160, SEQ ID NO:162, SEQ ID NO:164, SEQ ID NO:166, SEQ ID NO:168, SEQ ID NO:170, SEQ ID NO:172, SEQ ID NO:174, SEQ ID NO:176, SEQ ID NO:178, SEQ ID NO:180, SEQ ID NO:182, SEQ ID NO:184, SEQ ID NO:186, SEQ ID NO:188, SEQ ID NO:190, SEQ ID NO:192, SEQ ID NO:194, SEQ ID NO:196, SEQ ID NO:198, SEQ ID NO:200, SEQ ID NO:202, SEQ ID NO:204, SEQ ID NO:206, SEQ ID NO:208, SEQ ID NO:210, SEQ ID NO:212, SEQ ID NO:214, SEQ ID NO:216, SEQ ID NO:218, SEQ ID NO:220, SEQ ID NO:220 with one, several or all of the modifications of Table 46 or Table 55, SEQ ID NO:222, SEQ ID NO:224, SEQ ID NO:226, SEQ ID NO:228, SEQ ID NO:230, SEQ ID NO:232, SEQ ID NO:234, SEQ ID NO:236, SEQ ID NO:238, SEQ ID NO:240, SEQ ID NO:242, SEQ ID NO:244, SEQ ID NO:246, SEQ ID NO:248, SEQ ID NO:250, SEQ ID NO:252, SEQ ID NO:254, SEQ ID NO:256, SEQ ID NO:258, SEQ ID NO:260, SEQ ID NO:262, SEQ ID NO:264, SEQ ID NO:266, SEQ ID NO:268, SEQ ID NO:270, SEQ ID NO:272, SEQ ID NO:274, SEQ ID NO:276, SEQ ID NO:278, SEQ ID NO:280, SEQ ID NO:282, SEQ ID NO:284, SEQ ID NO:286, SEQ ID NO:288, SEQ ID NO:290, SEQ ID NO:292, SEQ ID NO:294, SEQ ID NO:296, SEQ ID NO:298, SEQ ID NO:300, SEQ ID NO:302, SEQ ID NO:304, SEQ ID NO:306, SEQ ID NO:308, SEQ ID NO:310, SEQ ID NO:312, SEQ ID NO:314, SEQ ID NO:316, SEQ ID NO:318, SEQ ID NO:320, SEQ ID NO:322, SEQ ID NO:324, SEQ ID NO:326, SEQ ID NO:328, SEQ ID NO:330, SEQ ID NO:332, SEQ ID NO:334, SEQ ID NO:336, SEQ ID NO:338, SEQ ID NO:340, SEQ ID NO:342, SEQ ID NO:344, SEQ ID NO:346, SEQ ID NO:348, SEQ ID NO:350, SEQ ID NO:352, SEQ ID NO:354, SEQ ID NO:356, SEQ ID NO:358, SEQ ID NO:360, SEQ ID NO:362, SEQ ID NO:364, SEQ ID NO:366, SEQ ID NO:368, SEQ ID NO:370, SEQ ID NO:372, SEQ ID NO:374, SEQ ID NO:376, SEQ ID NO:378, SEQ ID NO:380, SEQ ID NO:382, SEQ ID NO:384, SEQ ID NO:386, SEQ ID NO:388, SEQ ID NO:390, SEQ ID NO:392, SEQ ID NO:394, SEQ ID NO:396, SEQ ID NO:398, SEQ ID NO:400, SEQ ID NO:402, SEQ ID NO:404, SEQ ID NO:406, SEQ ID NO:408, SEQ ID NO:410, SEQ ID NO:412, SEQ ID NO:414, SEQ ID NO:416, SEQ ID NO:418, SEQ ID NO:420, SEQ ID NO:422, SEQ ID NO:424, SEQ ID NO:426, SEQ ID NO:428, SEQ ID NO:430, SEQ ID NO:432, SEQ ID NO:434, SEQ ID NO:436, SEQ ID NO:438, SEQ ID NO:440, SEQ ID NO:442, SEQ ID NO:444, SEQ ID NO:446, SEQ ID NO:448, SEQ ID NO:450, SEQ ID NO:452, SEQ ID NO:454, SEQ ID NO:456, SEQ ID NO:458, SEQ ID NO:460, SEQ ID NO:462, SEQ ID NO:464, SEQ ID NO:466, SEQ ID NO:468, SEQ ID NO:470, SEQ ID NO:472, SEQ ID NO:474, SEQ ID NO:476, SEQ ID NO:478, SEQ ID NO:480, SEQ ID NO:482, SEQ ID NO:484, SEQ ID NO:486, SEQ ID NO:488, SEQ ID NO:490, SEQ ID NO:492, SEQ ID NO:494, SEQ ID NO:496, SEQ ID NO:498, SEQ ID NO:500, SEQ ID NO:502, SEQ ID NO:504, SEQ ID NO:506, SEQ ID NO:508, SEQ ID NO:510, SEQ ID NO:512, SEQ ID NO:514, SEQ ID NO:516, SEQ ID NO:518, SEQ ID NO:520, SEQ ID NO:522, SEQ ID NO:524, SEQ ID NO:526, SEQ ID NO:528, SEQ ID NO:530, SEQ ID NO:532, SEQ ID NO:534, SEQ ID NO:536, SEQ ID NO:538, SEQ ID NO:540, SEQ ID NO:542, SEQ ID NO:544, SEQ ID NO:546, SEQ ID NO:548, SEQ ID NO:550, SEQ ID NO:552, SEQ ID NO:554, SEQ ID NO:556, SEQ ID NO:558, SEQ ID NO:560, SEQ ID NO:562, SEQ ID NO:564, SEQ ID NO:566, SEQ ID NO:568, SEQ ID NO:570, SEQ ID NO:572, SEQ ID NO:574, SEQ ID NO:576, SEQ ID NO:578, SEQ ID NO:580, SEQ ID NO:582, SEQ ID NO:584, SEQ ID NO:586, SEQ ID NO:588, SEQ ID NO:590, SEQ ID NO:592, SEQ ID NO:594, SEQ ID NO:596, SEQ ID NO:598, SEQ ID NO:600, SEQ ID NO:602, SEQ ID NO:604, SEQ ID NO:606, SEQ ID NO:608, SEQ ID NO:610, SEQ ID NO:612, SEQ ID NO:614, SEQ ID NO:616, SEQ ID NO:618, SEQ ID NO:620, SEQ ID NO:622, SEQ ID NO:624, SEQ ID NO:626, SEQ ID NO:628, SEQ ID NO:630, SEQ ID NO:632, SEQ ID NO:634, SEQ ID NO:636, SEQ ID NO:638, SEQ ID NO:640, SEQ ID NO:642, SEQ ID NO:644, SEQ ID NO:646, SEQ ID NO:648, SEQ ID NO:650, SEQ ID NO:652, SEQ ID NO:654, SEQ ID NO:656, SEQ ID NO:658, SEQ ID NO:660, SEQ ID NO:662, SEQ ID NO:664, SEQ ID NO:666, SEQ ID NO:668, SEQ ID NO:670, SEQ ID NO:672, SEQ ID NO:674, SEQ ID NO:676, SEQ ID NO:678, SEQ ID NO:680, SEQ ID NO:682, SEQ ID NO:684, SEQ ID NO:686, SEQ ID NO:688, SEQ ID NO:690, SEQ ID NO:692, SEQ ID NO:694, SEQ ID NO:696, SEQ ID NO:698, SEQ ID NO:700, SEQ ID NO:702, SEQ ID NO:704, SEQ ID NO:706, SEQ ID NO:708, SEQ ID NO:710, SEQ ID NO:712, SEQ ID NO:714, SEQ ID NO:716, SEQ ID NO:718, SEQ ID NO:720, SEQ ID NO:722, SEQ ID NO:724, SEQ ID NO:726, SEQ ID NO:728, SEQ ID NO:730, SEQ ID NO:732, SEQ ID NO:734, SEQ ID NO:736, SEQ ID NO:738, SEQ ID NO:740, SEQ ID NO:742, SEQ ID NO:744, SEQ ID NO:746, SEQ ID NO:748, SEQ ID NO:750, SEQ ID NO:752, SEQ ID NO:754, SEQ ID NO:756, SEQ ID NO:758, SEQ ID NO:760, SEQ ID NO:762, SEQ ID NO:764, SEQ ID NO:766, SEQ ID NO:768, SEQ ID NO:770, SEQ ID NO:772, SEQ ID NO:774, SEQ ID NO:776, SEQ ID NO:778, SEQ ID NO:780, SEQ ID NO:782, SEQ ID NO:784, SEQ ID NO:786, SEQ ID NO:788, SEQ ID NO:790, SEQ ID NO:792, SEQ ID NO:794, SEQ ID NO:796, SEQ ID NO:798, SEQ ID NO:800, SEQ ID NO:802, SEQ ID NO:804, SEQ ID NO:808, SEQ ID NO:808, SEQ ID NO:810, SEQ ID NO:812, SEQ ID NO:814, SEQ ID NO:816, SEQ ID NO:818, SEQ ID NO:820, SEQ ID NO:822, SEQ ID NO:824, SEQ ID NO:826, SEQ ID NO:828, SEQ ID NO:830, SEQ ID NO:832, SEQ ID NO:834, SEQ ID NO:836, SEQ ID NO:838, SEQ ID NO:840, SEQ ID NO:842, SEQ ID NO:844, SEQ ID NO:846, SEQ ID NO:848, SEQ ID NO:850, SEQ ID NO:852, SEQ ID NO:854, SEQ ID NO:856, SEQ ID NO:858, SEQ ID NO:860, SEQ ID NO:862, SEQ ID NO:864, SEQ ID NO:866, SEQ ID NO:868, SEQ ID NO:870, SEQ ID NO:872, SEQ ID NO:874, SEQ ID NO:876, SEQ ID NO:878, SEQ ID NO:880, SEQ ID NO:882, SEQ ID NO:884, SEQ ID NO:886, SEQ ID NO:888, SEQ ID NO:890, SEQ ID NO:892, SEQ ID NO:894, SEQ ID NO:896, SEQ ID NO:898, SEQ ID NO:900, SEQ ID NO:902, SEQ ID NO:904, SEQ ID NO:906, SEQ ID NO:908, SEQ ID NO:910, SEQ ID NO:912, SEQ ID NO:914, SEQ ID NO:916, SEQ ID NO:918, SEQ ID NO:920, SEQ ID NO:922, SEQ ID NO:924, SEQ ID NO:926, SEQ ID NO:928, SEQ ID NO:930, SEQ ID NO:932, SEQ ID NO:934, SEQ ID NO:936, SEQ ID NO:938, SEQ ID NO:940, SEQ ID NO:942, SEQ ID NO:944, SEQ ID NO:946, SEQ ID NO:948, SEQ ID NO:950, SEQ ID NO:952, SEQ ID NO:954, SEQ ID NO:956, SEQ ID NO:958, SEQ ID NO:960, SEQ ID NO:962, SEQ ID NO:964, SEQ ID NO:966, SEQ ID NO:968, SEQ ID NO:970, SEQ ID NO:972, SEQ ID NO:974 and/or SEQ ID NO:976, including the sequences described herein and in Tables 1, 2 and 3, below, and in the Sequence Listing (all of these sequences are “exemplary enzymes/polypeptides of the invention”), and enzymatically active subsequences (fragments) thereof.
Tables 1, 2 and 3, below, are charts describing selected characteristics of exemplary nucleic acids and polypeptides of the invention, including sequence identity comparison of the exemplary sequences to public databases.
Table 1, below, describes the assigned activity (as determined by experimental data, see Examples 1 through 23 of the exemplary polypeptides (encoded by the exemplary polynucleotides) of the invention. Table 1 further indicates whether the polynucleotide (encoding a polypeptide) of the invention is a clone (a genomic sequence isolated from the original source, as described in Table 2) or is a subclone (where the clone is manipulated by, e.g. removal of a native signal sequence, addition of a start Methionine, addition of a tag, etc). Table 1 also indicates the clone and subclone relationship, e.g. which subclone was derived from which clone. For aid in reading Table 1, for example, Columns 1 and 4, rows 1 and 2, indicate that SEQ ID NO:32 (encoded by SEQ ID NO:31) is a clone with the corresponding subclone being SEQ ID NO:868 (encoded by SEQ ID NO:867), denoted as “Clone/subclone pair 1”.
Table 2, below, indicates the source from which the exemplary nucleic acids and polypeptides of the invention were first derived. Table 2, below, also indicates the “Signalp Cleavage Site” for the exemplary enzyme's signal sequence (or “signal peptide”, or SP), as determined by the paradigm Signalp, as discussed below (see Nielsen (1997), infra); the “Predicted Signal Sequence” is listed from the amino terminal to the carboxy terminal, for example, for the polypeptide SEQ ID NO:258, the signal peptide is “MKSAIVLGAGMVGIATAVHL”.
Table 3, below describes selected characteristics of exemplary nucleic acids and polypeptides of the invention, including sequence identity comparison of the exemplary sequences to public databases. To further aid in reading Table 3, for example, the first row, labeled “SEQ ID NO:”, the numbers “1, 2” represent the exemplary polypeptide of the invention having a sequence as set forth in SEQ ID NO:2, encoded by, e.g., SEQ ID NO:1. All sequences described in Table 2 (all the exemplary sequences of the invention) have been subject to a BLAST search (as described in detail, below) against two sets of databases. The first database set is available through NCBI (National Center for Biotechnology Information). All results from searches against these databases are found in the columns entitled “NR Description”, “NR Accession Code”, “NR Evalue” or “NR Organism”. “NR” refers to the Non-Redundant nucleotide database maintained by NCBI. This database is a composite of GenBank, GenBank updates, and EMBL updates. The entries in the column “NR Description” refer to the definition line in any given NCBI record, which includes a description of the sequence, such as the source organism, gene name/protein name, or some description of the function of the sequence. The entries in the column “NR Accession Code” refer to the unique identifier given to a sequence record. The entries in the column “NR Evalue” refer to the Expect value (Evalue), which represents the probability that an alignment score as good as the one found between the query sequence (the sequences of the invention) and a database sequence would be found in the same number of comparisons between random sequences as was done in the present BLAST search.
The entries in the column “NR Organism” refer to the source organism of the sequence identified as the closest BLAST hit. The second set of databases is collectively known as the GENESEQTM database, which is available through Thomson Derwent (Philadelphia, Pa.). All results from searches against this database are found in the columns entitled “GENESEQTM Protein Description”, “GENESEQTM Protein Accession Code”, “Evalue”, “GENESEQTM DNA Description”, “GENESEQTM DNA Accession Code” or “Evalue”. The information found in these columns is comparable to the information found in the NR columns described above, except that it was derived from BLAST searches against the GENESEQTM database instead of the NCBI databases. In addition, this table includes the column “Predicted EC No.”. An EC number is the number assigned to a type of enzyme according to a scheme of standardized enzyme nomenclature developed by the Enzyme Commission of the Nomenclature Committee of the International Union of Biochemistry and Molecular Biology (IUBMB). The results in the “Predicted EC No.” column are determined by a BLAST search against the Kegg (Kyoto Encyclopedia of Genes and Genomes) database. If the top BLAST match has an Evalue equal to or less than e-6, the EC number assigned to the top match is entered into the table. The EC number of the top hit is used as a guide to what the EC number of the sequence of the invention might be. The columns “Query DNA Length” and “Query Protein Length” refer to the number of nucleotides or the number amino acids, respectively, in the sequence of the invention that was searched or queried against either the NCBI or GENESEQTM databases. The columns “Subject DNA Length” and “Subject Protein Length” refer to the number of nucleotides or the number amino acids, respectively, in the sequence of the top match from the BLAST searches. The results provided in these columns are from the search that returned the lower Evalue, either from the NCBI databases or the Geneseq database. The columns “% ID Protein” and “% ID DNA” refer to the percent sequence identity between the sequence of the invention and the sequence of the top BLAST match. The results provided in these columns are from the search that returned the lower Evalue, either from the NCBI databases or the GENESEQTM database.










TABLE 1





Clone/subclone
SEQ ID

Sequence type (clone or


pair
NO:
Activity
subclone)


















1
31, 32
D-AT
Clone


1
867, 868
D-AT
Subclone


2
955, 956
D-AT
Clone


2
929, 930
D-AT
Subclone


3
957, 958
D-AT
Clone


3
931, 932
D-AT
Subclone


4
959, 960
D-AT
Clone


4
935, 936
D-AT
Subclone


5
41, 42
D-AT
Clone


5
869, 870
D-AT
Subclone


6
7, 8
D-AT
Clone


6
943, 944
D-AT
Subclone


7
11, 12
D-AT
Clone


7
941, 942
D-AT
Subclone


8
83, 84
D-AT
Clone


8
879, 880
D-AT
Subclone


9
151, 152
D-AT
Clone


9
913, 914
D-AT
Subclone


10
951, 952
D-AT
Clone


10
933, 934
D-AT
Subclone


11
75, 76
D-AT
Clone


11
881, 882
D-AT
Subclone


12
87, 88
D-AT
Clone


12
883, 884
D-AT
Subclone


13
163, 164
D-AT
Clone


13
921, 922
D-AT
Subclone


14
145, 146
D-AT
Clone


14
919, 920
D-AT
Subclone


15
149, 150
D-AT
Clone


15
925, 926
D-AT
Subclone


16
147, 148
D-AT
Clone


16
915, 916
D-AT
Subclone


17
15, 16
D-AT
Clone


17
947, 948
D-AT
Subclone


18
17, 18
D-AT
Clone


18
949, 950
D-AT
Subclone


19
3, 4
D-AT
Clone


19
937, 938
D-AT
Subclone


20
5, 6
D-AT
Clone


20
939, 940
D-AT
Subclone


21
161, 162
D-AT
Clone


21
923, 924
D-AT
Subclone


22
953, 954
D-AT
Clone


22
927, 928
D-AT
Subclone


23
19, 20
D-AT
Clone


23
885, 886
D-AT
Subclone


24
21, 22
D-AT
Clone


24
891, 892
D-AT
Subclone


25
23, 24
D-AT
Clone


25
893, 894
D-AT
Subclone


26
13, 14
D-AT
Clone


26
945, 946
D-AT
Subclone


27
143, 144
D-AT
Clone


27
917, 918
D-AT
Subclone


28
43, 44
D-AT
Clone


28
871, 872
D-AT
Subclone


29
45, 46
D-AT
Clone


29
873, 874
D-AT
Subclone


30
49, 50
D-AT
Clone


30
897, 898
D-AT
Subclone


31
51, 52
D-AT
Clone


31
875, 876
D-AT
Subclone


32
37, 38
D-AT
Clone


32
877, 878
D-AT
Subclone


33
25, 26
D-AT
Clone


33
889, 890
D-AT
Subclone


34
27, 28
D-AT
Clone


34
887, 888
D-AT
Subclone


35
131, 132
D-AT
Clone


35
909, 910
D-AT
Subclone


36
53, 54
D-AT
Clone


36
865, 866
D-AT
Subclone


37
29, 30
D-AT
Clone


37
895, 896
D-AT
Subclone


38
125, 126
D-AT
Clone


38
907, 908
D-AT
Subclone


39
133, 134
D-AT
Clone


39
911, 912
D-AT
Subclone


40
127, 128
D-AT
Clone


40
899, 900
D-AT
Subclone


41
137, 138
D-AT
Clone


41
901, 902
D-AT
Subclone


42
139, 140
D-AT
Clone


42
903, 904
D-AT
Subclone


43
129, 130
D-AT
Clone


43
905, 906
D-AT
Subclone


44
33, 34
D-AT
Clone


44
969, 970
D-AT
Subclone


45
219, 220
D-AT
Clone


45
973, 974
D-AT
Subclone


46
39, 40
D-AT
Clone


46
971, 972
D-AT
Subclone


47
1, 2
D-AT
Clone


47
975, 976
D-AT
Subclone


48
253, 254
Dehydrogenase
Clone


48
961, 962
Dehydrogenase
Subclone


48
963, 964
Dehydrogenase
Subclone


48
965, 966
Dehydrogenase
Subclone


48
967, 968
Dehydrogenase
Subclone



35, 36
D-AT
Clone



9, 10
D-AT
Clone



85, 86
D-AT
Clone



77, 78
D-AT
Clone



153, 154
D-AT
Clone



155, 156
D-AT
Clone



201, 202
D-AT
Clone



221, 222
D-AT
Clone



235, 236
D-AT
Clone



203, 204
D-AT
Clone



237, 238
D-AT
Clone



239, 240
D-AT
Clone



159, 160
D-AT
Clone



165, 166
D-AT
Clone



211, 212
D-AT
Clone



249, 250
D-AT
Clone



177, 178
D-AT
Clone



223, 224
D-AT
Clone



169, 170
D-AT
Clone



179, 180
D-AT
Clone



181, 182
D-AT
Clone



63, 64
D-AT
Clone



107, 108
D-AT
Clone



109, 110
D-AT
Clone



111, 112
D-AT
Clone



113, 114
D-AT
Clone



115, 116
D-AT
Clone



123, 124
D-AT
Clone



225, 226
D-AT
Clone



227, 228
D-AT
Clone



247, 248
D-AT
Clone



217, 218
D-AT
Clone



205, 206
D-AT
Clone



183, 184
D-AT
Clone



185, 186
D-AT
Clone



241, 242
D-AT
Clone



243, 244
D-AT
Clone



229, 230
D-AT
Clone



231, 232
D-AT
Clone



187, 188
D-AT
Clone



189, 190
D-AT
Clone



191, 192
D-AT
Clone



207, 208
D-AT
Clone



99, 100
D-AT
Clone



55, 56
D-AT
Clone



57, 58
D-AT
Clone



193, 194
D-AT
Clone



233, 234
D-AT
Clone



215, 216
D-AT
Clone



195, 196
D-AT
Clone



199, 200
D-AT
Clone



197, 198
D-AT
Clone



209, 210
D-AT
Clone



141, 142
D-AT
Clone



157, 158
D-AT
Clone



245, 246
D-AT
Clone



59, 60
D-AT
Clone



61, 62
D-AT
Clone



47, 48
D-AT
Clone



213, 214
D-AT
Clone



171, 172
D-AT
Clone



167, 168
D-AT
Clone



173, 174
D-AT
Clone



175, 176
D-AT
Clone



65, 66
D-AT
Clone



67, 68
D-AT
Clone



69, 70
D-AT
Clone



71, 72
D-AT
Clone



73, 74
D-AT
Clone



79, 80
D-AT
Clone



81, 82
D-AT
Clone



93, 94
D-AT
Clone



91, 92
D-AT
Clone



95, 96
D-AT
Clone



97, 98
D-AT
Clone



117, 118
D-AT
Clone



119, 120
D-AT
Clone



121, 122
D-AT
Clone



101, 102
D-AT
Clone



103, 104
D-AT
Clone



105, 106
D-AT
Clone



89, 90
D-AT
Clone



135, 136
D-AT
Clone



259, 260
Dehydrogenase
Clone



261, 262
Dehydrogenase
Clone



263, 264
Dehydrogenase
Clone



327, 328
Dehydrogenase
Clone



335, 336
Dehydrogenase
Clone



353, 354
Dehydrogenase
Clone



355, 356
Dehydrogenase
Clone



321, 322
Dehydrogenase
Clone



341, 342
Dehydrogenase
Clone



265, 266
Dehydrogenase
Clone



287, 288
Dehydrogenase
Clone



267, 268
Dehydrogenase
Clone



269, 270
Dehydrogenase
Clone



301, 302
Dehydrogenase
Clone



413, 414
Dehydrogenase
Clone



433, 434
Dehydrogenase
Clone



423, 424
Dehydrogenase
Clone



303, 304
Dehydrogenase
Clone



425, 426
Dehydrogenase
Clone



393, 394
Dehydrogenase
Clone



297, 298
Dehydrogenase
Clone



299, 300
Dehydrogenase
Clone



567, 568
Dehydrogenase
Clone



515, 516
Dehydrogenase
Clone



465, 466
Dehydrogenase
Clone



387, 388
Dehydrogenase
Clone



409, 410
Dehydrogenase
Clone



411, 412
Dehydrogenase
Clone



375, 376
Dehydrogenase
Clone



407, 408
Dehydrogenase
Clone



391, 392
Dehydrogenase
Clone



485, 486
Dehydrogenase
Clone



603, 604
Dehydrogenase
Clone



605, 606
Dehydrogenase
Clone



517, 518
Dehydrogenase
Clone



543, 544
Dehydrogenase
Clone



429, 430
Dehydrogenase
Clone



443, 444
Dehydrogenase
Clone



365, 366
Dehydrogenase
Clone



445, 446
Dehydrogenase
Clone



431, 432
Dehydrogenase
Clone



449, 450
Dehydrogenase
Clone



467, 468
Dehydrogenase
Clone



379, 380
Dehydrogenase
Clone



367, 368
Dehydrogenase
Clone



405, 406
Dehydrogenase
Clone



383, 384
Dehydrogenase
Clone



357, 358
Dehydrogenase
Clone



415, 416
Dehydrogenase
Clone



395, 396
Dehydrogenase
Clone



385, 386
Dehydrogenase
Clone



369, 370
Dehydrogenase
Clone



397, 398
Dehydrogenase
Clone



435, 436
Dehydrogenase
Clone



453, 454
Dehydrogenase
Clone



469, 470
Dehydrogenase
Clone



447, 448
Dehydrogenase
Clone



473, 474
Dehydrogenase
Clone



389, 390
Dehydrogenase
Clone



427, 428
Dehydrogenase
Clone



451, 452
Dehydrogenase
Clone



399, 400
Dehydrogenase
Clone



455, 456
Dehydrogenase
Clone



417, 418
Dehydrogenase
Clone



403, 404
Dehydrogenase
Clone



419, 420
Dehydrogenase
Clone



251, 252
Dehydrogenase
Clone



371, 372
Dehydrogenase
Clone



475, 476
Dehydrogenase
Clone



457, 458
Dehydrogenase
Clone



459, 460
Dehydrogenase
Clone



461, 462
Dehydrogenase
Clone



463, 464
Dehydrogenase
Clone



477, 478
Dehydrogenase
Clone



479, 480
Dehydrogenase
Clone



481, 482
Dehydrogenase
Clone



629, 630
Dehydrogenase
Clone



519, 520
Dehydrogenase
Clone



521, 522
Dehydrogenase
Clone



589, 590
Dehydrogenase
Clone



359, 360
Dehydrogenase
Clone



361, 362
Dehydrogenase
Clone



381, 382
Dehydrogenase
Clone



363, 364
Dehydrogenase
Clone



625, 626
Dehydrogenase
Clone



549, 550
Dehydrogenase
Clone



551, 552
Dehydrogenase
Clone



501, 502
Dehydrogenase
Clone



571, 572
Dehydrogenase
Clone



601, 602
Dehydrogenase
Clone



573, 574
Dehydrogenase
Clone



575, 576
Dehydrogenase
Clone



577, 578
Dehydrogenase
Clone



611, 612
Dehydrogenase
Clone



579, 580
Dehydrogenase
Clone



523, 524
Dehydrogenase
Clone



553, 554
Dehydrogenase
Clone



503, 504
Dehydrogenase
Clone



505, 506
Dehydrogenase
Clone



507, 508
Dehydrogenase
Clone



509, 510
Dehydrogenase
Clone



525, 526
Dehydrogenase
Clone



373, 374
Dehydrogenase
Clone



421, 422
Dehydrogenase
Clone



483, 484
Dehydrogenase
Clone



511, 512
Dehydrogenase
Clone



527, 528
Dehydrogenase
Clone



555, 556
Dehydrogenase
Clone



529, 530
Dehydrogenase
Clone



591, 592
Dehydrogenase
Clone



557, 558
Dehydrogenase
Clone



559, 560
Dehydrogenase
Clone



593, 594
Dehydrogenase
Clone



581, 582
Dehydrogenase
Clone



613, 614
Dehydrogenase
Clone



595, 596
Dehydrogenase
Clone



597, 598
Dehydrogenase
Clone



599, 600
Dehydrogenase
Clone



583, 584
Dehydrogenase
Clone



615, 616
Dehydrogenase
Clone



619, 620
Dehydrogenase
Clone



621, 622
Dehydrogenase
Clone



561, 562
Dehydrogenase
Clone



563, 564
Dehydrogenase
Clone



587, 588
Dehydrogenase
Clone



513, 514
Dehydrogenase
Clone



531, 532
Dehydrogenase
Clone



533, 534
Dehydrogenase
Clone



535, 536
Dehydrogenase
Clone



585, 586
Dehydrogenase
Clone



617, 618
Dehydrogenase
Clone



627, 628
Dehydrogenase
Clone



623, 624
Dehydrogenase
Clone



537, 538
Dehydrogenase
Clone



565, 566
Dehydrogenase
Clone



539, 540
Dehydrogenase
Clone



541, 542
Dehydrogenase
Clone



569, 570
Dehydrogenase
Clone



607, 608
Dehydrogenase
Clone



609, 610
Dehydrogenase
Clone



487, 488
Dehydrogenase
Clone



545, 546
Dehydrogenase
Clone



495, 496
Dehydrogenase
Clone



497, 498
Dehydrogenase
Clone



499, 500
Dehydrogenase
Clone



489, 490
Dehydrogenase
Clone



491, 492
Dehydrogenase
Clone



493, 494
Dehydrogenase
Clone



547, 548
Dehydrogenase
Clone



401, 402
Dehydrogenase
Clone



377, 378
Dehydrogenase
Clone



437, 438
Dehydrogenase
Clone



439, 440
Dehydrogenase
Clone



441, 442
Dehydrogenase
Clone



271, 272
Dehydrogenase
Clone



273, 274
Dehydrogenase
Clone



293, 294
Dehydrogenase
Clone



275, 276
Dehydrogenase
Clone



277, 278
Dehydrogenase
Clone



279, 280
Dehydrogenase
Clone



281, 282
Dehydrogenase
Clone



283, 284
Dehydrogenase
Clone



285, 286
Dehydrogenase
Clone



291, 292
Dehydrogenase
Clone



289, 290
Dehydrogenase
Clone



255, 256
Dehydrogenase
Clone



295, 296
Dehydrogenase
Clone



257, 258
Dehydrogenase
Clone



471, 472
Dehydrogenase
Clone



323, 324
Dehydrogenase
Clone



325, 326
Dehydrogenase
Clone



305, 306
Dehydrogenase
Clone



331, 332
Dehydrogenase
Clone



343, 344
Dehydrogenase
Clone



345, 346
Dehydrogenase
Clone



337, 338
Dehydrogenase
Clone



309, 310
Dehydrogenase
Clone



307, 308
Dehydrogenase
Clone



347, 348
Dehydrogenase
Clone



329, 330
Dehydrogenase
Clone



339, 340
Dehydrogenase
Clone



311, 312
Dehydrogenase
Clone



313, 314
Dehydrogenase
Clone



315, 316
Dehydrogenase
Clone



317, 318
Dehydrogenase
Clone



349, 350
Dehydrogenase
Clone



351, 352
Dehydrogenase
Clone



333, 334
Dehydrogenase
Clone



319, 320
Dehydrogenase
Clone



675, 676
Oxidoreductase
Clone



671, 672
Oxidoreductase
Clone



673, 674
Oxidoreductase
Clone



643, 644
Oxidoreductase
Clone



645, 646
Oxidoreductase
Clone



647, 648
Oxidoreductase
Clone



649, 650
Oxidoreductase
Clone



663, 664
Oxidoreductase
Clone



807, 808
Oxidoreductase
Clone



697, 698
Oxidoreductase
Clone



699, 700
Oxidoreductase
Clone



837, 838
Oxidoreductase
Clone



715, 716
Oxidoreductase
Clone



717, 718
Oxidoreductase
Clone



701, 702
Oxidoreductase
Clone



687, 688
Oxidoreductase
Clone



703, 704
Oxidoreductase
Clone



719, 720
Oxidoreductase
Clone



709, 710
Oxidoreductase
Clone



711, 712
Oxidoreductase
Clone



713, 714
Oxidoreductase
Clone



689, 690
Oxidoreductase
Clone



681, 682
Oxidoreductase
Clone



705, 706
Oxidoreductase
Clone



721, 722
Oxidoreductase
Clone



809, 810
Oxidoreductase
Clone



811, 812
Oxidoreductase
Clone



813, 814
Oxidoreductase
Clone



815, 816
Oxidoreductase
Clone



839, 840
Oxidoreductase
Clone



695, 696
Oxidoreductase
Clone



707, 708
Oxidoreductase
Clone



791, 792
Oxidoreductase
Clone



745, 746
Oxidoreductase
Clone



747, 748
Oxidoreductase
Clone



855, 856
Oxidoreductase
Clone



857, 858
Oxidoreductase
Clone



859, 860
Oxidoreductase
Clone



861, 862
Oxidoreductase
Clone



863, 864
Oxidoreductase
Clone



773, 774
Oxidoreductase
Clone



723, 724
Oxidoreductase
Clone



775, 776
Oxidoreductase
Clone



633, 634
Oxidoreductase
Clone



635, 636
Oxidoreductase
Clone



749, 750
Oxidoreductase
Clone



725, 726
Oxidoreductase
Clone



825, 826
Oxidoreductase
Clone



751, 752
Oxidoreductase
Clone



777, 778
Oxidoreductase
Clone



683, 684
Oxidoreductase
Clone



685, 686
Oxidoreductase
Clone



753, 754
Oxidoreductase
Clone



755, 756
Oxidoreductase
Clone



779, 780
Oxidoreductase
Clone



827, 828
Oxidoreductase
Clone



781, 782
Oxidoreductase
Clone



757, 758
Oxidoreductase
Clone



829, 830
Oxidoreductase
Clone



851, 852
Oxidoreductase
Clone



849, 850
Oxidoreductase
Clone



817, 818
Oxidoreductase
Clone



831, 832
Oxidoreductase
Clone



793, 794
Oxidoreductase
Clone



823, 824
Oxidoreductase
Clone



843, 844
Oxidoreductase
Clone



845, 846
Oxidoreductase
Clone



819, 820
Oxidoreductase
Clone



759, 760
Oxidoreductase
Clone



783, 784
Oxidoreductase
Clone



785, 786
Oxidoreductase
Clone



833, 834
Oxidoreductase
Clone



835, 836
Oxidoreductase
Clone



795, 796
Oxidoreductase
Clone



797, 798
Oxidoreductase
Clone



799, 800
Oxidoreductase
Clone



801, 802
Oxidoreductase
Clone



761, 762
Oxidoreductase
Clone



803, 804
Oxidoreductase
Clone



805, 806
Oxidoreductase
Clone



763, 764
Oxidoreductase
Clone



765, 766
Oxidoreductase
Clone



767, 768
Oxidoreductase
Clone



769, 770
Oxidoreductase
Clone



771, 772
Oxidoreductase
Clone



787, 788
Oxidoreductase
Clone



789, 790
Oxidoreductase
Clone



841, 842
Oxidoreductase
Clone



729, 730
Oxidoreductase
Clone



731, 732
Oxidoreductase
Clone



733, 734
Oxidoreductase
Clone



735, 736
Oxidoreductase
Clone



727, 728
Oxidoreductase
Clone



691, 692
Oxidoreductase
Clone



693, 694
Oxidoreductase
Clone



847, 848
Oxidoreductase
Clone



853, 854
Oxidoreductase
Clone



651, 652
Oxidoreductase
Clone



653, 654
Oxidoreductase
Clone



655, 656
Oxidoreductase
Clone



657, 658
Oxidoreductase
Clone



659, 660
Oxidoreductase
Clone



661, 662
Oxidoreductase
Clone



637, 638
Oxidoreductase
Clone



631, 632
Oxidoreductase
Clone



639, 640
Oxidoreductase
Clone



641, 642
Oxidoreductase
Clone



737, 738
Oxidoreductase
Clone



739, 740
Oxidoreductase
Clone



821, 822
Oxidoreductase
Clone



741, 742
Oxidoreductase
Clone



743, 744
Oxidoreductase
Clone



679, 680
Oxidoreductase
Clone



665, 666
Oxidoreductase
Clone



667, 668
Oxidoreductase
Clone



669, 670
Oxidoreductase
Clone



677, 678
Oxidoreductase
Clone



















TABLE 2







Signalp



SEQ ID NO:
Source
Cleavage Site
Predicted Signal Sequence







1, 2
Unknown




 


3, 4
Unknown




 


5, 6
Unknown




 


7, 8
Unknown




 


9, 10
Unknown




 


11, 12
Unknown




 


13, 14
Unknown




 


15, 16
Unknown




 


17, 18
Unknown




 


19, 20
Unknown




 


21, 22
Unknown




 


23, 24
Unknown




 


25, 26
Unknown




 


27, 28
Unknown




 


29, 30
Unknown




 


31, 32
Unknown




 


33, 34
Unknown




 


35, 36
Unknown




 


37, 38
Unknown




 


39, 40
Unknown




 


41, 42
Unknown




 


43, 44
Unknown




 


45, 46
Unknown




 


47, 48
Unknown




 


49, 50
Unknown




 


51, 52
Unknown




 


53, 54
Unknown




 


55, 56
Unknown




 


57, 58
Unknown




 


59, 60
Unknown




 


61, 62
Unknown




 


63, 64
Unknown




 


65, 66
Unknown




 


67, 68
Unknown




 


69, 70
Unknown




 


71, 72
Unknown




 


73, 74
Unknown




 


75, 76
Unknown




 


77, 78
Unknown




 


79, 80
Unknown




 


81, 82
Unknown




 


83, 84
Unknown




 


85, 86
Unknown




 


87, 88
Unknown




 


89, 90
Unknown




 


91, 92
Unknown




 


93, 94
Unknown




 


95, 96
Unknown




 


97, 98
Unknown




 


99, 100
Unknown




 


101, 102
Unknown




 


103, 104
Unknown




 


105, 106
Unknown




 


107, 108
Unknown




 


109, 110
Unknown




 


111, 112
Unknown




 


113, 114
Unknown




 


115, 116
Unknown




 


117, 118
Unknown




 


119, 120
Unknown




 


121, 122
Unknown




 


123, 124
Unknown




 


125, 126
Unknown




 


127, 128
Unknown




 


129, 130
Unknown




 


131, 132
Unknown




 


133, 134
Unknown




 


135, 136
Unknown




 


137, 138
Unknown




 


139, 140
Unknown




 


141, 142
Unknown




 


143, 144
Unknown




 


145, 146
Unknown




 


147, 148
Unknown




 


149, 150
Unknown




 


151, 152
Unknown




 


153, 154
Unknown




 


155, 156
Unknown
Probability:
KNSPIIAAYRAATPGSAAA




0.991 AA1: 19





AA2: 20



 


157, 158
Unknown




 


159, 160
Unknown




 


161, 162
Unknown




 


163, 164
Unknown




 


165, 166
Unknown




 


167, 168
Unknown




 


169, 170
Rhodococcus





erythropolis





DSMZ 44522




 


171, 172
Unknown




 


173, 174
Unknown




 


175, 176
Unknown




 


177, 178
Unknown




 


179, 180
Unknown




 


181, 182
Unknown




 


183, 184
Unknown




 


185, 186
Unknown




 


187, 188
Unknown




 


189, 190
Unknown




 


191, 192
Unknown




 


193, 194
Unknown




 


195, 196
Unknown




 


197, 198
Unknown




 


199, 200
Unknown




 


201, 202
Unknown




 


203, 204
Unknown




 


205, 206
Unknown




 


207, 208
Unknown




 


209, 210
Unknown




 


211, 212
Unknown




 


213, 214
Unknown




 


215, 216
Unknown




 


217, 218
Unknown




 


219, 220
Unknown




 


221, 222
Unknown




 


223, 224
Unknown




 


225, 226
Unknown




 


227, 228
Unknown




 


229, 230
Unknown




 


231, 232
Unknown




 


233, 234
Unknown




 


235, 236
Unknown




 


237, 238
Unknown




 


239, 240
Unknown




 


241, 242
Unknown




 


243, 244
Unknown




 


245, 246
Unknown




 


247, 248
Unknown




 


249, 250
Unknown




 


251, 252
Unknown




 


253, 254
Unknown




 


255, 256
Unknown




 


257, 258
Unknown
Probability:
MKSAIVLGAGMVGIATAVHL




0.612 AA1: 20





AA2: 21



 


259, 260
Unknown




 


261, 262
Unknown




 


263, 264
Unknown




 


265, 266
Unknown




 


267, 268
Unknown




 


269, 270
Unknown




 


271, 272
Unknown
Probability:
MKPTSILVLGAGMVGTCTALHL




0.836 AA1: 22





AA2: 23



 


273, 274
Unknown




 


275, 276
Unknown




 


277, 278
Unknown




 


279, 280
Unknown




 


281, 282
Unknown




 


283, 284
Unknown
Probability:
MKAIVLGSGVLGTTTAYYLA




0.549 AA1: 20





AA2: 21



 


285, 286
Unknown
Probability:
MARPRSVIICGGGIIGLCTAYSLA




0.957 AA1: 24





AA2: 25



 


287, 288
Unknown




 


289, 290
Unknown




 


291, 292
Unknown




 


293, 294
Unknown




 


295, 296
Unknown




 


297, 298
Unknown
Probability:
MQSIAVIGGGITGVTSAYALA




0.898 AA1: 21





AA2: 22



 


299, 300
Unknown
Probability:
MQSIAVIGGGITGVTSAYALA




0.898 AA1: 21





AA2: 22



 


301, 302
Unknown




 


303, 304
Unknown
Probability:
MKVLVLGAGVVGTATALA




0.945 AA1: 18





AA2: 19



 


305, 306
Unknown




 


307, 308
Unknown




 


309, 310
Unknown




 


311, 312
Unknown




 


313, 314
Unknown




 


315, 316
Unknown




 


317, 318
Unknown




 


319, 320
Unknown
Probability:
MKSARPVKTVGIAGAGTMGRGIAAA




0.725 AA1: 25





AA2: 26



 


321, 322
Unknown




 


323, 324
Unknown




 


325, 326
Unknown
Probability:
MRVLVLGSGVIGTASAYYLA




0.552 AA1: 20





AA2: 21



 


327, 328
Unknown




 


329, 330
Unknown




 


331, 332
Unknown




 


333, 334
Unknown
Probability:
MKSARPVKTVGIAGAGTMGRGIAAA




0.725 AA1: 25





AA2: 26



 


335, 336
Unknown




 


337, 338
Unknown




 


339, 340
Unknown




 


341, 342
Unknown




 


343, 344
Unknown




 


345, 346
Unknown




 


347, 348
Unknown




 


349, 350
Unknown




 


351, 352
Unknown




 


353, 354
Unknown
Probability:
MRQSRSVIICGGGVIGLSCAYYLA




0.791 AA1: 24





AA2: 25



 


355, 356
Unknown




 


357, 358
Unknown




 


359, 360
Rhodococcus





ruber DSMZ





44319




 


361, 362
Rhodococcus





ruber DSMZ





44319




 


363, 364
Rhodococcus





ruber DSMZ





44319




 


365, 366
Unknown




 


367, 368
Unknown




 


369, 370
Unknown




 


371, 372
Unknown




 


373, 374
Unknown




 


375, 376
Unknown




 


377, 378
Unknown




 


379, 380
Unknown




 


381, 382
Rhodococcus





ruber DSMZ





44319




 


383, 384
Unknown
Probability:
MMKIMVLGGGVIGVTTAYYLA




0.657 AA1: 21





AA2: 22



 


385, 386
Unknown




 


387, 388
Unknown
Probability:
MRIVVLGAGVVGTTAAYCLA




0.930 AA1: 20





AA2: 21



 


389, 390
Unknown




 


391, 392
Unknown
Probability:
MSSTRRVIVIGGGVIGAASA




0.711 AA1: 20





AA2: 21



 


393, 394
Unknown
Probability:
MKILVIGAGVIGVATAWA




0.968 AA1: 18





AA2: 19



 


395, 396
Unknown
Probability:
MTKDIVVLGAGVVGVCTALA




0.638 AA1: 20





AA2: 21



 


397, 398
Unknown




 


399, 400
Unknown




 


401, 402
Unknown
Probability:
MKTLVLGGGIAGLSSAFA




0.999 AA1: 18





AA2: 19



 


403, 404
Unknown
Probability:
MSKKGTSVIIGGGISGLASA




0.959 AA1: 20





AA2: 21



 


405, 406
Unknown




 


407, 408
Unknown




 


409, 410
Unknown




 


411, 412
Unknown




 


413, 414
Unknown




 


415, 416
Unknown




 


417, 418
Unknown
Probability:
MKITILGAGVIGVTSAYYLA




0.709 AA1: 20





AA2: 21



 


419, 420
Unknown




 


421, 422
Unknown




 


423, 424
Unknown




 


425, 426
Unknown




 


427, 428
Unknown




 


429, 430
Unknown




 


431, 432
Unknown




 


433, 434
Unknown




 


435, 436
Unknown
Probability:
MPGTVDAIVLGAGIVGVSAALA




0.738 AA1: 22





AA2: 23



 


437, 438
Unknown




 


439, 440
Unknown




 


441, 442
Unknown




 


443, 444
Unknown




 


445, 446
Unknown




 


447, 448
Unknown




 


449, 450
Unknown
Probability:
MKRDVIVLGAGMVGVGCALHLQA




0.823 AA1: 23





AA2: 24



 


451, 452
Unknown




 


453, 454
Unknown




 


455, 456
Unknown




 


457, 458
Unknown




 


459, 460
Unknown
Probability:
MQRIAVIGGGITGITSAYALA




0.950 AA1: 21





AA2: 22



 


461, 462
Unknown
Probability:
MPSVLITGATSGFGKAAA




0.557 AA1: 18





AA2: 19



 


463, 464
Unknown




 


465, 466
Unknown




 


467, 468
Unknown




 


469, 470
Unknown




 


471, 472
Unknown




 


473, 474
Unknown




 


475, 476
Unknown




 


477, 478
Unknown




 


479, 480
Unknown




 


481, 482
Unknown




 


483, 484
Unknown




 


485, 486
Unknown




 


487, 488
Unknown




 


489, 490
Unknown




 


491, 492
Unknown
Probability:
MKISIVGAGLAGLCAAHALVA




1.000 AA1: 21





AA2: 22



 


493, 494
Unknown




 


495, 496
Unknown




 


497, 498
Unknown




 


499, 500
Unknown
Probability:
MKFDVAVLGAGIVGISTALHLQA




0.852 AA1: 23





AA2: 24



 


501, 502
Unknown




 


503, 504
Unknown




 


505, 506
Unknown




 


507, 508
Unknown




 


509, 510
Unknown




 


511, 512
Unknown
Probability:
MTEASRTSRQTEVIVLGAGIVGVSTAL




0.696 AA1: 28
A




AA2: 29



 


513, 514
Unknown




 


515, 516
Unknown
Probability:
MQSIAVIGGGITGVTSAYALA




0.898 AA1: 21





AA2: 22



 


517, 518
Unknown
Probability:
MKSVIIIGGGIIGLCSAYYLA




0.798 AA1: 21





AA2: 22



 


519, 520
Unknown




 


521, 522
Rhodococcus





erythropolis





DSMZ 44522




 


523, 524
Unknown
Probability:
MKKKILVIGGGAIGLFCAYYLR




0.601 AA1: 22





AA2: 23



 


525, 526
Unknown




 


527, 528
Unknown




 


529, 530
Unknown




 


531, 532
Unknown




 


533, 534
Unknown
Probability:
MRNSKSVVVCGGGIVGLCTAYYLA




0.716 AA1: 24





AA2: 25



 


535, 536
Unknown




 


537, 538
Unknown




 


539, 540
Unknown




 


541, 542
Unknown




 


543, 544
Unknown




 


545, 546
Unknown




 


547, 548
Unknown
Probability:
MTDKRRVVVCGGGVIGLCCADSLA




0.696 AA1: 24





AA2: 25



 


549, 550
Unknown




 


551, 552
Unknown




 


553, 554
Unknown




 


555, 556
Unknown




 


557, 558
Unknown




 


559, 560
Unknown




 


561, 562
Unknown
Probability:
MDPHVVIAGCGFGGLFAARALA




0.765 AA1: 22





AA2: 23



 


563, 564
Unknown




 


565, 566
Unknown




 


567, 568
Unknown




 


569, 570
Unknown




 


571, 572
Unknown




 


573, 574
Unknown
Probability:
MSRPRSVIICGGGIVGLCTAYSLA




0.982 AA1: 24





AA2: 25



 


575, 576
Unknown




 


577, 578
Unknown




 


579, 580
Unknown
Probability:
MKITILGAGVIGVTSAYYLA




0.772 AA1: 20





AA2: 21



 


581, 582
Unknown




 


583, 584
Unknown




 


585, 586
Unknown




 


587, 588
Unknown




 


589, 590
Rhodococcus





erythropolis





DSMZ 44522




 


591, 592
Unknown




 


593, 594
Unknown




 


595, 596
Unknown




 


597, 598
Unknown
Probability:
MKVLVLGGGVIGVSSAYFLA




0.672 AA1: 20





AA2: 21



 


599, 600
Unknown
Probability:
MKVIVLGAGVVGVTSAYQLA




0.873 AA1: 20





AA2: 21



 


601, 602
Unknown
Probability:
MKITILGAGVIGVTSAYYLA




0.773 AA1: 20





AA2: 21



 


603, 604
Unknown
Probability:
MKRVIVIGSGALGLCSAYFLQ




0.781 AA1: 21





AA2: 22



 


605, 606
Unknown




 


607, 608
Unknown




 


609, 610
Unknown




 


611, 612
Unknown
Probability:
MKITILGAGVIGVTSAYYLA




0.772 AA1: 20





AA2: 21



 


613, 614
Unknown
Probability:
MKITIIGAGIAGVSTAWA




0.995 AA1: 18





AA2: 19



 


615, 616
Unknown




 


617, 618
Unknown




 


619, 620
Unknown




 


621, 622
Unknown
Probability:
MRTSKSVIVCGGGIVGLCTAYYLA




0.710 AA1: 24





AA2: 25



 


623, 624
Unknown




 


625, 626
Flavobacterium





sp. ATCC





27551




 


627, 628
Unknown




 


629, 630
Unknown




 


631, 632
Unknown




 


633, 634
Unknown
Probability:
MKVIVLGAGVIGTTTAYYLA




0.648 AA1: 20





AA2: 21



 


635, 636
Unknown
Probability:
MKVIVLGAGVIGTTTAYYLA




0.651 AA1: 20





AA2: 21



 


637, 638
Unknown




 


639, 640
Unknown




 


641, 642
Unknown




 


643, 644
Unknown
Probability:
MTRARHVVVIGAGVVGSCTAQALA




0.993 AA1: 24





AA2: 25



 


645, 646
Unknown




 


647, 648
Unknown




 


649, 650
Unknown




 


651, 652
Unknown
Probability:
MAREVIVLGAGIVGVSTAAHL




0.598 AA1: 21





AA2: 22



 


653, 654
Unknown




 


655, 656
Unknown




 


657, 658
Unknown




 


659, 660
Unknown




 


661, 662
Unknown
Probability:
MKRSVQRRQVVLGSGAALLVGALDG




0.944 AA1: 39 
CAGSIRTLQSPAPA




AA2: 40



 


663, 664
Unknown




 


665, 666
Unknown
Probability:
MKSVAIIGAGLAGLATA




0.910 AA1: 17





AA2: 18



 


667, 668
Unknown




 


669, 670
Unknown




 


671, 672
Unknown




 


673, 674
Unknown




 


675, 676
Unknown




 


677, 678
Unknown




 


679, 680
Unknown




 


681, 682
Unknown
Probability:
MRIVVIGAGLPGVTTACFLAQA




0.781 AA1: 22





AA2: 23



 


683, 684
Unknown
Probability:
MNVLVVGAGVVGTSTALS




0.549 AA1: 18





AA2: 19



 


685, 686
Unknown
Probability:
MNKRTPERVVVIGGGVVGATTALA




0.957 AA1: 24





AA2: 25



 


687, 688
Unknown




 


689, 690
Unknown




 


691, 692
Unknown
Probability:
MKTIAVLGAGVTGITTAYA




0.984 AA1: 19





AA2: 20



 


693, 694
Unknown




 


695, 696
Unknown




 


697, 698
Unknown




 


699, 700
Unknown




 


701, 702
Unknown
Probability:
MNRSVAIIGAGVSGLTCGVVFA




0.999 AA1: 22





AA2: 23



 


703, 704
Unknown




 


705, 706
Unknown
Probability:
MKSAIVLGAGMVGVSTALA




0.935 AA1: 19





AA2: 20



 


707, 708
Unknown




 


709, 710
Unknown




 


711, 712
Unknown




 


713, 714
Unknown




 


715, 716
Unknown
Probability:
MKVIVIGAGVVGATTALS




0.528 AA1: 18





AA2: 19



 


717, 718
Unknown




 


719, 720
Unknown




 


721, 722
Unknown




 


723, 724
Unknown
Probability:
MHTIVIGAGVVGASTALSLA




0.857 AA1: 20





AA2: 21



 


725, 726
Unknown




 


727, 728
Unknown
Probability:
MHIVVIGAGVMGVTTAYA




0.785 AA1: 18





AA2: 19



 


729, 730
Unknown




 


731, 732
Unknown




 


733, 734
Unknown
Probability:
MHVIVIGAGVVGSTTALA




0.903 AA1: 18





AA2: 19



 


735, 736
Unknown
Probability:
KEFGTSISAATLALAARPAQS




0.983 AA1: 21





AA2: 22



 


737, 738
Unknown




 


739, 740
Unknown




 


741, 742
Unknown




 


743, 744
Unknown




 


745, 746
Unknown
Probability:
MTHSDILIIGGGIAGMSAAFFLA




0.754 AA1: 23





AA2: 24



 


747, 748
Unknown




 


749, 750
Unknown




 


751, 752
Unknown




 


753, 754
Unknown




 


755, 756
Unknown




 


757, 758
Unknown
Probability:
MQDILVLGAGMVGVSTALA




0.911 AA1: 19





AA2: 20



 


759, 760
Unknown




 


761, 762
Unknown




 


763, 764
Unknown
Probability:
MHTIVIGAGVVGASTALSLA




0.857 AA1: 20





AA2: 21



 


765, 766
Unknown




 


767, 768
Unknown
Probability:
MSLHVIVIGAGVVGASTVLSLA




0.682 AA1: 22





AA2: 23



 


769, 770
Unknown




 


771, 772
Unknown




 


773, 774
Unknown




 


775, 776
Unknown
Probability:
MRVLVIGAGLAGLTA




0.527 AA1: 15





AA2: 16



 


777, 778
Unknown




 


779, 780
Unknown




 


781, 782
Unknown




 


783, 784
Unknown




 


785, 786
Unknown
Probability:
MHTIVIGAGVVGTSTALSLA




0.706 AA1: 20





AA2: 21



 


787, 788
Unknown
Probability:
MHAIVIGAGVVGASTALSLA




0.639 AA1: 20





AA2: 21



 


789, 790
Unknown
Probability:
MKEVVVLGAGMVGTATALA




0.953 AA1: 19





AA2: 20



 


791, 792
Unknown




 


793, 794
Unknown




 


795, 796
Unknown




 


797, 798
Unknown




 


799, 800
Unknown




 


801, 802
Unknown
Probability:
MHVIVIGAGVVGSTTALA




0.903 AA1: 18





AA2: 19



 


803, 804
Unknown
Probability:
MPPHVIVVGAGVVGASTALSLA




0.763 AA1: 22





AA2: 23



 


805, 806
Unknown




 


807, 808
Unknown
Probability:
MHIVVIGAGVMGVTTAYA




0.785 AA1: 18





AA2: 19



 


809, 810
Unknown




 


811, 812
Unknown




 


813, 814
Unknown




 


815, 816
Unknown




 


817, 818
Unknown
Probability:
MKILVLGAGVVGTATALA




0.973 AA1: 18





AA2: 19



 


819, 820
Unknown
Probability:
MHVVVLGAGVVGTTTALALA




0.926 AA1: 20





AA2: 21



 


821, 822
Unknown




 


823, 824
Unknown




 


825, 826
Unknown




 


827, 828
Unknown




 


829, 830
Unknown
Probability:
MNKRTPERVVVIGGGVVGASTALA




0.973 AA1: 24





AA2: 25



 


831, 832
Unknown
Probability:
MYSETKTTRNVDCIVIGAGMAGASA




0.995 AA1: 33
AASLSAEA




AA2: 34



 


833, 834
Unknown
Probability:
MHVIVIGAGVVGSTTALA




0.903 AA1: 18





AA2: 19



 


835, 836
Unknown




 


837, 838
Unknown




 


839, 840
Unknown




 


841, 842
Unknown




 


843, 844
Unknown




 


845, 846
Unknown




 


847, 848
Unknown




 


849, 850
Unknown
Probability:
MRVLVLGAGVVGTATALA




0.930 AA1: 18





AA2: 19



 


851, 852
Unknown




 


853, 854
Unknown




 


855, 856
Unknown
Probability:
MQKDIWDFVIVGAGMAGASTAWQ




0.553 AA1: 23





AA2: 24



 


857, 858
Unknown
Probability:
MQKDIWDFVIVGAGMAGASTAWQ




0.553 AA1: 23





AA2: 24



 


859, 860
Unknown
Probability:
MQKDIWDFVIVGAGMAGASTAWQ




0.553 AA1: 23





AA2: 24



 


861, 862
Unknown
Probability:
MAHYDAVVVGAGVVGLTTAVSLA




0.672 AA1: 23





AA2: 24



 


863, 864
Unknown
Probability:
MRVLVLGSGVIGTASAYYLA




0.544 AA1: 20





AA2: 21



 


865, 866
Unknown




 


867, 868
Unknown




 


869, 870
Unknown




 


871, 872
Unknown




 


873, 874
Unknown




 


875, 876
Unknown




 


877, 878
Unknown




 


879, 880
Unknown




 


881, 882
Unknown




 


883, 884
Unknown




 


885, 886
Unknown




 


887, 888
Unknown




 


889, 890
Unknown




 


891, 892
Unknown




 


893, 894
Unknown




 


895, 896
Unknown




 


897, 898
Unknown




 


899, 900
Unknown




 


901, 902
Unknown




 


903, 904
Unknown




 


905, 906
Unknown




 


907, 908
Unknown
Probability:
MAADVVWLNGAVVPAAEA




0.665 AA1: 18





AA2: 19



 


909, 910
Unknown




 


911, 912
Unknown




 


913, 914
Unknown




 


915, 916
Unknown




 


917, 918
Unknown




 


919, 920
Unknown




 


921, 922
Unknown




 


923, 924
Unknown




 


925, 926
Unknown




 


927, 928
Unknown




 


929, 930
Unknown




 


931, 932
Unknown




 


933, 934
Unknown
Probability:
MARVSRRFLEDSSSGATTMAFAQLAS




0.607 AA1: 30
EAKR




AA2: 31



 


935, 936
Unknown




 


937, 938
Unknown




 


939, 940
Unknown




 


941, 942
Unknown




 


943, 944
Unknown




 


945, 946
Unknown




 


947, 948
Unknown




 


949, 950
Unknown




 


951, 952
Pyrolobus





fumarius




 


953, 954
Aquifex





aeolicus




 


955, 956
Unknown




 


957, 958
Unknown




 


959, 960
Unknown






















TABLE 3













Geneseq


SEQ

NR



Protein


ID

Accession
NR


Accession


NO:
NR Description
Code
Evalue
NR Organism
Geneseq Protein Description
Code





1, 2
conserved hypothetical protein
115385557
1.00E−125
Aspergillus terreus
Aminotransferase/mutase/deaminase
ADS78245



[Aspergillus terreus NIH2624]


NIH2624
enzyme #14.


3, 4
aminotransferase; class IV
99078145
1.00E−96
Silicibacter sp.
Bacterial polypeptide #19.
ADF03944



[Silicibacter sp. TM1040]


TM1040


5, 6
D-amino acid aminotransferase
39935662
8.00E−77
Rhodopseudomonas
Bacterial polypeptide #19.
ADF03944



[Rhodopseudomonas palustris


palustris CGA009



CGA009]


7, 8
D-alanine transaminase
119896473
1.00E−92
Azoarcus sp. BH72
P. stutzeri 4 D-HPG AT outer
AEM18040



[Azoarcus sp. BH72]



forward N-term PCR primer 1.


9,
aminotransferase; class IV
114330773
2.00E−46
Nitrosomonas
Prokaryotic essential gene #34740.
ABU33175


10
[Nitrosomonas eutropha C91]


eutropha C91


11,
D-alanine aminotransferase
89360213
5.00E−85
Xanthobacter
Bacterial polypeptide #19.
ADF03944


12
[Xanthobacter autotrophicus


autotrophicus Py2



Py2]



gi|89350945|gb|EAS16227.1|D-



alanine aminotransferase



[Xanthobacter autotrophicus



Py2]


13,
D-amino acid aminotransferase
82745661
2.00E−99
Clostridium
P. stutzeri 4 D-HPG AT outer
AEM18031


14
[Clostridium beijerincki


beijerincki NCIMB
forward N-term PCR primer 1.



NCIMB 8052]


8052



gi|82726488|gb|EAP61226.1|D-



amino acid aminotransferase



[Clostridium beijerincki



NCIMB 8052]


15,
d-alanine aminotransferase
110834821
4.00E−56
Alcanivorax
Bacillus D-amino acid
AAY13560


16
[Alcanivorax borkumensis SK2]


borkumensis SK2
aminotransferase.


17,
PUTATIVE BRANCHED-
3122274
6.00E−49
Methanothermobacter
Prokaryotic essential gene #34740.
ABU21638


18
CHAIN AMINO ACID


thermautotrophicus



AMINOTRANSFERASE



(TRANSAMINASE B)



(BCAT).


19,
D-amino acid aminotransferase
82745661
7.00E−97
Clostridium
P. stutzeri 4 D-HPG AT outer
AEM18031


20
[Clostridium beijerincki


beijerincki NCIMB
forward N-term PCR primer 1.



NCIMB 8052]


8052



gi|82726488|gb|EAP61226.1|D-



amino acid aminotransferase



[Clostridium beijerincki



NCIMB 8052]


21,
D-amino acid aminotransferase
82745661
1.00E−100
Clostridium
Mutant Bacillus sphaericus dat
ABB08244


22
[Clostridium beijerincki


beijerincki NCIMB
protein.



NCIMB 8052]


8052



gi|82726488|gb|EAP61226.1|D-



amino acid aminotransferase



[Clostridium beijerincki



NCIMB 8052]


23,
D-amino acid aminotransferase
82745661
6.00E−96
Clostridium
Mutant Bacillus sphaericus dat
ABB08244


24
[Clostridium beijerincki


beijerincki NCIMB
protein.



NCIMB 8052]


8052



gi|82726488|gb|EAP61226.1|D-



amino acid aminotransferase



[Clostridium beijerincki



NCIMB 8052]


25,
D-amino acid aminotransferase;
53802655
3.00E−86
Methylococcus
Staphylococcus aureus protein #10.
ABM71198


26
putative [Methylococcus


capsulatus str. Bath



capsulatus str. Bath]


27,
aminotransferase, class IV
119716594
9.00E−33
Nocardioides sp.
Escherichia coli aminotransferase
AEK20408


28
[Nocardioides sp. JS614]


JS614
ilvE SEQ ID NO 2.



gi|119537255|gb|ABL81872.1|



aminotransferase, class IV



[Nocardioides sp. JS614]


29,
D-amino acid aminotransferase
15894079
3.00E−81
Clostridium
Prokaryotic essential gene #34740.
ABU32980


30
[Clostridium acetobutylicum].


acetobutylicum


31,
histidinol-phosphate
145644535
1.00E−40
Methanococcus
Bacterial polypeptide #10001.
ADS43070


32
aminotransferase


maripaludis C7



[Methanococcus maripaludis



C7]



gi|145278069|gb|EDK17867.1|



histidinol-phosphate



aminotransferase



[Methanococcus maripaludis



C7]


33,
D-ALANINE
118222
1.00E−108
Bacillus sp. YM-1
P. stutzeri 4 D-HPG AT outer
AEM18018


34
AMINOTRANSFERASE (D-



forward N-term PCR primer 1.



ASPARTATE



AMINOTRANSFERASE) (D-



AMINO ACID



AMINOTRANSFERASE) (D-



AMINO ACID



TRANSAMINASE) (DAAT).


35,
pyridoxal phosphate-dependent
126353148
2.00E−53
Caldivirga
Klebsiella pneumoniae polypeptide
ABO62434


36
enzyme, putative [Caldivirga


maquilingensis IC-167
seqid 7178.



maquilingensis IC-167]



gi|126311802|gb|EAZ64256.1|



pyridoxal phosphate-dependent



enzyme, putative [Caldivirga



maquilingensis IC-167]


37,
glutamate-1-semialdehyde 2; 1-
149173540
1.00E−104
Planctomyces maris
Bacterial polypeptide #10001.
ADN26446


38
aminomutase; putative


DSM 8797



[Planctomyces maris DSM



8797]


39,
Serine--glyoxylate transaminase
148260372
1.00E−94
Acidiphilium cryptum
Prokaryotic essential gene #34740.
ABU21492


40
[Acidiphilium cryptum JF-5]


JF-5


41,
Chain A, Crystallographic
1127164
1.00E−126
Bacillus sp. YM-1
P. stutzeri 4 D-HPG AT outer
AEM18037


42
Structure Of D-Amino Acid



forward N-term PCR primer 1.



Aminotransferase Complexed



With Pyridoxal-5-Phosphate.


43,
glutamate-1-semialdehyde 2; 1-
149173540
1.00E−115
Planctomyces maris
Bacterial polypeptide #10001.
ADN26446


44
aminomutase; putative


DSM 8797



[Planctomyces maris DSM



8797]


45,
Serine--glyoxylate transaminase
148260372
1.00E−111
Acidiphilium cryptum
Prokaryotic essential gene #34740.
ABU21492


46
[Acidiphilium cryptum JF-5]


JF-5


47,
glutamate-1-semialdehyde 2; 1-
149173540
1.00E−103
Planctomyces maris
Bacterial polypeptide #10001.
ADN26446


48
aminomutase; putative


DSM 8797



[Planctomyces maris DSM



8797]


49,
aminotransferase class-III
118061613
1.00E−108
Roseiflexus
Bacterial polypeptide #10001.
ADN26446


50
[Roseiflexus castenholzii DSM


castenholzii DSM



13941]


13941



gi|118014341|gb|EAV28318.1|



aminotransferase class-III



[Roseiflexus castenholzii DSM



13941]


51,
aminotransferase class-III
118061613
1.00E−107
Roseiflexus
Bacterial polypeptide #10001.
ADN26446


52
[Roseiflexus castenholzii DSM


castenholzii DSM



13941]


13941



gi|118014341|gb|EAV28318.1|



aminotransferase class-III



[Roseiflexus castenholzii DSM



13941]


53,
D-alanine aminotransferase
90962639
3.00E−70
Lactobacillus
Staphylococcus aureus protein #10.
ABM71198


54
[Lactobacillus salivarius subsp.


salivarius subsp.



salivarius UCC118]


salivarius UCC118


55,
aminotransferase; class I and II
148547264
2.00E−66
Pseudomonas putida
Pseudomonas aeruginosa
ABO84364


56
[Pseudomonas putida F1]


F1
polypeptide #3.


57,
aminotransferase; class I and II
148547264
5.00E−66
Pseudomonas putida
Pseudomonas aeruginosa
ABO84364


58
[Pseudomonas putida F1]


F1
polypeptide #3.


59,
aminotransferase; class I and II
148547264
1.00E−65
Pseudomonas putida
Pseudomonas aeruginosa
ABO84364


60
[Pseudomonas putida F1]


F1
polypeptide #3.


61,
aminotransferase; class I and II
148547264
2.00E−66
Pseudomonas putida
Pseudomonas aeruginosa
ABO84364


62
[Pseudomonas putida F1]


F1
polypeptide #3.


63,
aminotransferase; class I and II
148547264
1.00E−65
Pseudomonas putida
Pseudomonas aeruginosa
ABO84364


64
[Pseudomonas putida F1]


F1
polypeptide #3.


65,
COG0436:
84317581
6.00E−59
Pseudomonas
Pseudomonas aeruginosa
ABO84364


66
Aspartate/tyrosine/aromatic


aeruginosa C3719
polypeptide #3.



aminotransferase [Pseudomonas



aeruginosa C3719]



gi|126170242|gb|EAZ55753.1|



aspartate transaminase



[Pseudomonas aeruginosa



C3719]


67,
COG0436:
84317581
1.00E−57
Pseudomonas
Pseudomonas aeruginosa
ABO84364


68
Aspartate/tyrosine/aromatic


aeruginosa C3719
polypeptide #3.



aminotransferase [Pseudomonas



aeruginosa C3719]



gi|126170242|gb|EAZ55753.1|



aspartate transaminase



[Pseudomonas aeruginosa



C3719]


69,
COG0436:
84317581
2.00E−58
Pseudomonas
Pseudomonas aeruginosa
ABO84364


70
Aspartate/tyrosine/aromatic


aeruginosa C3719
polypeptide #3.



aminotransferase [Pseudomonas



aeruginosa C3719]



gi|126170242|gb|EAZ55753.1|



aspartate transaminase



[Pseudomonas aeruginosa



C3719]


71,
aspartate aminotransferase
26990429
5.00E−68
Pseudomonas putida
Pseudomonas aeruginosa
ABO84364


72
[Pseudomonas putida KT2440]


KT2440
polypeptide #3.


73,
aspartate aminotransferase
26990429
3.00E−68
Pseudomonas putida
Pseudomonas aeruginosa
ABO84364


74
[Pseudomonas putida KT2440]


KT2440
polypeptide #3.


75,
D-alanine transaminase
94500389
1.00E−101
Oceanobacter sp.
L. pneumophila protein SEQ ID NO
AEB37927


76
[Oceanobacter sp. RED65]


RED65
3367.



gi|94427424|gb|EAT12402.1|



D-alanine transaminase



[Oceanobacter sp. RED65]


77,
D-alanine transaminase
94500389
1.00E−101
Oceanobacter sp.
L. pneumophila protein SEQ ID NO
AEB37927


78
[Oceanobacter sp. RED65]


RED65
3367.



gi|94427424|gb|EAT12402.1|



D-alanine transaminase



[Oceanobacter sp. RED65]


79,
aspartate aminotransferase
26990429
3.00E−64
Pseudomonas putida
Pseudomonas aeruginosa
ABO84364


80
[Pseudomonas putida KT2440]


KT2440
polypeptide #3.


81,
aspartate aminotransferase
26990429
4.00E−66
Pseudomonas putida
Pseudomonas aeruginosa
ABO84364


82
[Pseudomonas putida KT2440]


KT2440
polypeptide #3.


83,
glutamate-1-semialdehyde 2;1-
149173540
1.00E−101
Planctomyces maris
Bacterial polypeptide #10001.
ADN26446


84
aminomutase; putative


DSM 8797



[Planctomyces maris DSM



8797]


85,
aminotransferase; class IV
114319339
1.00E−69
Alkalilimnicola
L. pneumophila protein SEQ ID NO
AEB37927


86
[Alkalilimnicola ehrlichei


ehrlichei MLHE-1
3367.



MLHE-1]


87,
D-alanine transminase
74316285
3.00E−55
Thiobacillus
P. stutzeri 4 D-HPG AT outer
AEM18040


88
[Thiobacillus denitrificans


denitrificans ATCC
forward N-term PCR primer 1.



ATCC 25259]


25259


89,
aminotransferase; class I and II
148547264
5.00E−66
Pseudomonas putida
Pseudomonas aeruginosa
ABO84364


90
[Pseudomonas putida F1]


F1
polypeptide #3.


91,
aminotransferase; class I and II
148547264
4.00E−65
Pseudomonas putida
Pseudomonas aeruginosa
ABO84364


92
[Pseudomonas putida F1]


F1
polypeptide #3.


93,
aminotransferase; class I and II
148547264
4.00E−65
Pseudomonas putida
Pseudomonas aeruginosa
ABO84364


94
[Pseudomonas putida F1]


F1
polypeptide #3.


95,
aminotransferase; class I and II
148547264
4.00E−65
Pseudomonas putida
Pseudomonas aeruginosa
ABO84364


96
[Pseudomonas putida F1]


F1
polypeptide #3.


97,
aminotransferase; class I and II
148547264
1.00E−65
Pseudomonas putida
Pseudomonas aeruginosa
ABO84364


98
[Pseudomonas putida F1]


F1
polypeptide #3.


99,
aspartate aminotransferase
26990429
1.00E−66
Pseudomonas putida
Pseudomonas aeruginosa
ABO84364


100
[Pseudomonas putida KT2440]


KT2440
polypeptide #3.


101,
aspartate aminotransferase
26990429
7.00E−68
Pseudomonas putida
Pseudomonas aeruginosa
ABO84364


102
[Pseudomonas putida KT2440]


KT2440
polypeptide #3.


103,
aspartate aminotransferase
26990429
5.00E−66
Pseudomonas putida
Pseudomonas aeruginosa
ABO84364


104
[Pseudomonas putida KT2440]


KT2440
polypeptide #3.


105,
aspartate aminotransferase
26990429
2.00E−66
Pseudomonas putida
Pseudomonas aeruginosa
ABO84364


106
[Pseudomonas putida KT2440]


KT2440
polypeptide #3.


107,
aminotransferase; class I and II
148547264
7.00E−65
Pseudomonas putida
Pseudomonas aeruginosa
ABO84364


108
[Pseudomonas putida F1]


F1
polypeptide #3.


109,
aminotransferase; class I and II
148547264
1.00E−65
Pseudomonas putida
Pseudomonas aeruginosa
ABO84364


110
[Pseudomonas putida F1]


F1
polypeptide #3.


111,
aminotransferase; class I and II
148547264
3.00E−66
Pseudomonas putida
Pseudomonas aeruginosa
ABO84364


112
[Pseudomonas putida F1]


F1
polypeptide #3.


113,
aminotransferase; class I and II
148547264
1.00E−65
Pseudomonas putida
Pseudomonas aeruginosa
ABO84364


114
[Pseudomonas putida F1]


F1
polypeptide #3.


115,
aspartate aminotransferase
26990429
1.00E−65
Pseudomonas putida
Pseudomonas aeruginosa
ABO84364


116
[Pseudomonas putida KT2440]


KT2440
polypeptide #3.


117,
aminotransferase; class I and II
148547264
4.00E−65
Pseudomonas putida
Pseudomonas aeruginosa
ABO84364


118
[Pseudomonas putida F1]


F1
polypeptide #3.


119,
aminotransferase; class I and II
148547264
1.00E−65
Pseudomonas putida
Pseudomonas aeruginosa
ABO84364


120
[Pseudomonas putida F1]


F1
polypeptide #3.


121,
aminotransferase; class I and II
148547264
4.00E−65
Pseudomonas putida
Pseudomonas aeruginosa
ABO84364


122
[Pseudomonas putida F1]


F1
polypeptide #3.


123,
aspartate aminotransferase
26990429
8.00E−66
Pseudomonas putida
Pseudomonas aeruginosa
ABO84364


124
[Pseudomonas putida KT2440]


KT2440
polypeptide #3.


125,
D-alanine aminotransferase
29833346
4.00E−77
Streptomyces
Escherichia coli aminotransferase
AEK20408


126
[Streptomyces avermitilis MA-


avermitilis MA-4680
ilvE SEQ ID NO 2.



4680]


127,
glutamate-1-semialdehyde 2;1-
149173540
1.00E−143
Planctomyces maris
Bacterial polypeptide #10001.
ADN26446


128
aminomutase; putative


DSM 8797



[Planctomyces maris DSM



8797]


129,
D-alanine aminotransferase
77465457
1.00E−87
Rhodobacter
Bacterial polypeptide #19.
ADF03944


130
[Rhodobacter sphaeroides 2.4.1]


sphaeroides 2.4.1


131,
D-Amino Acid
126651304
1.00E−158
Bacillus sp. B14905
P. taetrolens aldolase 2.
ADW43694


132
Aminotransferase [Bacillus sp.



B14905]



gi|126591833|gb|EAZ85916.1|



D-Amino Acid



Aminotransferase [Bacillus sp.



B14905]


133,
aminotransferase class-IV
56477154
4.00E−67
Azoarcus sp. EbN1
Prokaryotic essential gene #34740.
ABU33175


134
[Azoarcus sp. EbN1]


135,
D-alanine aminotransferase
77465457
1.00E−87
Rhodobacter
Bacterial polypeptide #19.
ADF03944


136
[Rhodobacter sphaeroides 2.4.1]


sphaeroides 2.4.1


137,
glutamate-1-semialdehyde 2;1-
149173540
1.00E−111
Planctomyces maris
Bacterial polypeptide #10001.
ADN26446


138
aminomutase; putative


DSM 8797



[Planctomyces maris DSM



8797]


139,
glutamate-1-semialdehyde 2;1-
149173540
1.00E−108
Planctomyces maris
Bacterial polypeptide #10001.
ADN26446


140
aminomutase; putative


DSM 8797



[Planctomyces maris DSM



8797]


141,
Putative D-alanine
146342961
2.00E−71
Bradyrhizobium sp.
Bacterial polypeptide #19.
ADF03944


142
aminotransferase


ORS278



[Bradyrhizobium sp. ORS278]


143,
Aminotransferase, class IV
88806011
1.00E−101
Robiginitalea
Bacillus D-amino acid
AAY13560


144
[Robiginitalea biformata


biformata HTCC2501
aminotransferase.



HTCC2501]



gi|88783620|gb|EAR14791.1|



Aminotransferase, class IV



[Robiginitalea biformata



HTCC2501]


145,
glutamate-1-semialdehyde 2;1-
149173540
1.00E−114
Planctomyces maris
Bacterial polypeptide #10001.
ADN26446


146
aminomutase; putative


DSM 8797



[Planctomyces maris DSM



8797]


147,
aminotransferase class-III
118061613
1.00E−104
Roseiflexus
Bacterial polypeptide #10001.
ADN26446


148
[Roseiflexus castenholzii DSM


castenholzii DSM



13941]


13941



gi|118014341|gb|EAV28318.1|



aminotransferase class-III



[Roseiflexus castenholzii DSM



13941]


149,
glutamate-1-semialdehyde 2;1-
149173540
1.00E−114
Planctomyces maris
Bacterial polypeptide #10001.
ADN26446


150
aminomutase; putative


DSM 8797



[Planctomyces maris DSM



8797]


151,
D-alanine aminotransferase
52079452
1.00E−56
Bacillus licheniformis
P. stutzeri 4 D-HPG AT outer
AEM18039


152
[Bacillus licheniformis ATCC


ATCC 14580
forward N-term PCR primer 1.



14580]


153,
glutamate-1-semialdehyde 2;1-
149173540
1.00E−97
Planctomyces maris
Bacterial polypeptide #10001.
ADN26446


154
aminomutase; putative


DSM 8797



[Planctomyces maris DSM



8797]


155,
aminotransferase class-III
118045454
1.00E−107
Chloroflexus
Bacterial polypeptide #10001.
ADN26446


156
[Chloroflexus aggregans DSM


aggregans DSM 9485



9485]



gi|117997930|gb|EAV12112.1|



aminotransferase class-III



[Chloroflexus aggregans DSM



9485]


157,
aminotransferase, class IV
126725091
2.00E−78
Rhodobacterales
Bacterial polypeptide #19.
ADF03944


158
[Rhodobacterales bacterium


bacterium HTCC2150



HTCC2150]



gi|126706255|gb|EBA05345.1|



aminotransferase, class IV



[Rhodobacterales bacterium



HTCC2150]


159,
hypothetical protein
126646718
6.00E−43
Algoriphagus sp. PR1
Prokaryotic essential gene #34740.
ABU18963


160
ALPR1_18298 [Algoriphagus



sp. PR1]



gi|126576766|gb|EAZ81014.1|



hypothetical protein



ALPR1_18298 [Algoriphagus



sp. PR1]


161,
D-amino acid aminotransferase,
86140221
1.00E−139
Roseobacter sp.
Bacterial polypeptide #19.
ADF03944


162
putative [Roseobacter sp.


MED193



MED193]



gi|85823158|gb|EAQ43371.1|



D-amino acid aminotransferase,



putative [Roseobacter sp.



MED193]


163,
glutamate-1-semialdehyde 2;1-
149173540
1.00E−105
Planctomyces maris
Bacterial polypeptide #10001.
ADN26446


164
aminomutase; putative


DSM 8797



[Planctomyces maris DSM



8797]


165,
aminotransferase class-III
148656729
1.00E−105
Roseiflexus sp. RS-1
Bacterial polypeptide #10001.
ADN26446


166
[Roseiflexus sp. RS-1]


167,
D-amino acid aminotransferase
82745661
8.00E−96
Clostridium
P. stutzeri 4 D-HPG AT outer
AEM18031


168
[Clostridium beijerincki


beijerincki NCIMB
forward N-term PCR primer 1.



NCIMB 8052]


8052



gi|82726488|gb|EAP61226.1|D-



amino acid aminotransferase



[Clostridium beijerincki



NCIMB 8052]


169,
putative amino acid
120406056
1.00E−144
Mycobacterium
Prokaryotic essential gene #34740.
ABU33708


170
aminotransferase


vanbaalenii PYR-1



[Mycobacterium vanbaalenii



PYR-1]



gi|119958874|gb|ABM15879.1|



putative amino acid



aminotransferase



[Mycobacterium vanbaalenii



PYR-1]


171,
D-amino acid aminotransferase
82745661
3.00E−99
Clostridium
P. stutzeri 4 D-HPG AT outer
AEM18031


172
[Clostridium beijerincki


beijerincki NCIMB
forward N-term PCR primer 1.



NCIMB 8052]


8052



gi|82726488|gb|EAP61226.1|D-



amino acid aminotransferase



[Clostridium beijerincki



NCIMB 8052]


173,
D-amino acid aminotransferase
82745661
1.00E−98
Clostridium
Mutant Bacillus sphaericus dat
ABB08244


174
[Clostridium beijerincki


beijerincki NCIMB
protein.



NCIMB 8052]


8052



gi|82726488|gb|EAP61226.1|D-



amino acid aminotransferase



[Clostridium beijerincki



NCIMB 8052]


175,
D-amino acid aminotransferase
82745661
7.00E−98
Clostridium
Mutant Bacillus sphaericus dat
ABB08244


176
[Clostridium beijerincki


beijerincki NCIMB
protein.



NCIMB 8052]


8052



gi|82726488|gb|EAP61226.1|D-



amino acid aminotransferase



[Clostridium beijerincki



NCIMB 8052]


177,
aminotransferase class-III
118061613
1.00E−110
Roseiflexus
Bacterial polypeptide #10001.
ADN26446


178
[Roseiflexus castenholzii DSM


castenholzii DSM



13941]


13941



gi|118014341|gb|EAV28318.1|



aminotransferase class-III



[Roseiflexus castenholzii DSM



13941]


179,
D-amino acid aminotransferase
124520974
4.00E−54
Bacillus coagulans
Staphylococcus aureus protein #10.
ABM71198


180
[Bacillus coagulans 36D1]


36D1



gi|124497181|gb|EAY44748.1|



D-amino acid aminotransferase



[Bacillus coagulans 36D1]


181,
branched-chain amino acid
22299586
7.00E−53
Thermosynechococcus
Prokaryotic essential gene #34740.
ABU18055


182
aminotransferase


elongatus BP-1



[Thermosynechococcus



elongatus BP-1].


183,
D-alanine aminotransferase
23098538
2.00E−53
Oceanobacillus
P. stutzeri 4 D-HPG AT outer
AEM18040


184
[Oceanobacillus iheyensis].


iheyensis
forward N-term PCR primer 1.


185,
D-alanine aminotransferase
23098538
2.00E−53
Oceanobacillus
P. stutzeri 4 D-HPG AT outer
AEM18040


186
[Oceanobacillus iheyensis].


iheyensis
forward N-term PCR primer 1.


187,
D-amino acid aminotransferase
82745661
1.00E−96
Clostridium
P. stutzeri 4 D-HPG AT outer
AEM18031


188
[Clostridium beijerincki


beijerincki NCIMB
forward N-term PCR primer 1.



NCIMB 8052]


8052



gi|82726488|gb|EAP61226.1|D-



amino acid aminotransferase



[Clostridium beijerincki



NCIMB 8052]


189,
D-amino acid aminotransferase
82745661
9.00E−98
Clostridium
Mutant Bacillus sphaericus dat
ABB08244


190
[Clostridium beijerincki


beijerincki NCIMB
protein.



NCIMB 8052]


8052



gi|82726488|gb|EAP61226.1|D-



amino acid aminotransferase



[Clostridium beijerincki



NCIMB 8052]


191,
D-amino acid aminotransferase
82745661
1.00E−96
Clostridium
P. stutzeri 4 D-HPG AT outer
AEM18031


192
[Clostridium beijerincki


beijerincki NCIMB
forward N-term PCR primer 1.



NCIMB 8052]


8052



gi|82726488|gb|EAP61226.1|D-



amino acid aminotransferase



[Clostridium beijerincki



NCIMB 8052]


193,
D-amino acid aminotransferase
82745661
1.00E−96
Clostridium
P. stutzeri 4 D-HPG AT outer
AEM18031


194
[Clostridium beijerincki


beijerincki NCIMB
forward N-term PCR primer 1.



NCIMB 8052]


8052



gi|82726488|gb|EAP61226.1|D-



amino acid aminotransferase



[Clostridium beijerincki



NCIMB 8052]


195,
putative D-alanine
149182609
1.00E−59
Bacillus sp. SG-1
Bacillus D-amino acid
AAY13560


196
aminotransferase [Bacillus sp.



aminotransferase.



SG-1]


197,
putative D-alanine
149182609
3.00E−57
Bacillus sp. SG-1
P. stutzeri 4 D-HPG AT outer
AEM18039


198
aminotransferase [Bacillus sp.



forward N-term PCR primer 1.



SG-1]


199,
putative D-alanine
149182609
5.00E−59
Bacillus sp. SG-1
Bacillus D-amino acid
AAY13560


200
aminotransferase [Bacillus sp.



aminotransferase.



SG-1]


201,
D-alanine aminotransferase
51892468
6.00E−57
Symbiobacterium
Bacillus D-amino acid
AAY13560


202
[Symbiobacterium


thermophilum IAM
aminotransferase.



thermophilum IAM 14863]


14863


203,
PUTATIVE BRANCHED-
3122274
2.00E−46
Methanothermobacter
Prokaryotic essential gene #34740.
ABU23351


204
CHAIN AMINO ACID


thermautotrophicus



AMINOTRANSFERASE



(TRANSAMINASE B)



(BCAT).


205,
D-alanine aminotransferase
23098538
2.00E−53
Oceanobacillus
P. stutzeri 4 D-HPG AT outer
AEM18040


206
[Oceanobacillus iheyensis].


iheyensis
forward N-term PCR primer 1.


207,
D-alanine aminotransferase
23098538
7.00E−51
Oceanobacillus
P. stutzeri 4 D-HPG AT outer
AEM18040


208
[Oceanobacillus iheyensis].


iheyensis
forward N-term PCR primer 1.


209,
aminotransferase class-III
118061613
1.00E−105
Roseiflexus
Bacterial polypeptide #10001.
ADN26446


210
[Roseiflexus castenholzii DSM


castenholzii DSM



13941]


13941



gi|118014341|gb|EAV28318.1|



aminotransferase class-III



[Roseiflexus castenholzii DSM



13941]


211,
hypothetical protein
145952948
6.00E−42
Clostridium difficile
Bacterial polypeptide #10001.
ADS43070


212
CdifQ_04002916 [Clostridium


QCD-32g58



difficile QCD-32g58]


213,
D-amino acid aminotransferase
82745661
3.00E−95
Clostridium
P. stutzeri 4 D-HPG AT outer
AEM18018


214
[Clostridium beijerincki


beijerincki NCIMB
forward N-term PCR primer 1.



NCIMB 8052]


8052



gi|82726488|gb|EAP61226.1|D-



amino acid aminotransferase



[Clostridium beijerincki



NCIMB 8052]


215,
aminotransferase class-III
118061613
1.00E−116
Roseiflexus
Bacterial polypeptide #10001.
ADN26446


216
[Roseiflexus castenholzii DSM


castenholzii DSM



13941]


13941



gi|118014341|gb|EAV28318.1|



aminotransferase class-III



[Roseiflexus castenholzii DSM



13941]


217,
D-alanine aminotransferase
23098538
2.00E−53
Oceanobacillus
P. stutzeri 4 D-HPG AT outer
AEM18040


218
[Oceanobacillus iheyensis].


iheyensis
forward N-term PCR primer 1.


219,
D-amino acid aminotransferase
82745661
3.00E−98
Clostridium
Mutant Bacillus sphaericus dat
ABB08244


220
[Clostridium beijerincki


beijerincki NCIMB
protein.



NCIMB 8052]


8052



gi|82726488|gb|EAP61226.1|D-



amino acid aminotransferase



[Clostridium beijerincki



NCIMB 8052]


221,
D-alanine aminotransferase
51892468
1.00E−57
Symbiobacterium
Bacillus D-amino acid
AAY13560


222
[Symbiobacterium


thermophilum IAM
aminotransferase.



thermophilum IAM 14863]


14863


223,
D-alanine aminotransferase
23098538
3.00E−97
Oceanobacillus
Heat resistant D-amino acid
ABB06297


224
[Oceanobacillus iheyensis].


iheyensis
aminotransferase encoding DNA.


225,
D-amino acid aminotransferase
82745661
7.00E−97
Clostridium
Mutant Bacillus sphaericus dat
ABB08244


226
[Clostridium beijerincki


beijerincki NCIMB
protein.



NCIMB 8052]


8052



gi|82726488|gb|EAP61226.1|D-



amino acid aminotransferase



[Clostridium beijerincki



NCIMB 8052]


227,
D-amino acid aminotransferase
82745661
4.00E−98
Clostridium
P. stutzeri 4 D-HPG AT outer
AEM18031


228
[Clostridium beijerincki


beijerincki NCIMB
forward N-term PCR primer 1.



NCIMB 8052]


8052



gi|82726488|gb|EAP61226.1|D-



amino acid aminotransferase



[Clostridium beijerincki



NCIMB 8052]


229,
D-amino acid aminotransferase
82745661
3.00E−94
Clostridium
Mutant Bacillus sphaericus dat
ABB08244


230
[Clostridium beijerincki


beijerincki NCIMB
protein.



NCIMB 8052]


8052



gi|82726488|gb|EAP61226.1|D-



amino acid aminotransferase



[Clostridium beijerincki



NCIMB 8052]


231,
D-amino acid aminotransferase
82745661
2.00E−97
Clostridium
P. stutzeri 4 D-HPG AT outer
AEM18031


232
[Clostridium beijerincki


beijerincki NCIMB
forward N-term PCR primer 1.



NCIMB 8052]


8052



gi|82726488|gb|EAP61226.1|D-



amino acid aminotransferase



[Clostridium beijerincki



NCIMB 8052]


233,
hypothetical protein
126646718
2.00E−43
Algoriphagus sp. PR1
B. licheniformis butyryl-CoA
AEJ13860


234
ALPR1_18298 [Algoriphagus



dehydrogenase/acyl-CoA



sp. PR1]



dehydrogenase pro. 1.



gi|126576766|gb|EAZ81014.1|



hypothetical protein



ALPR1_18298 [Algoriphagus



sp. PR1]


235,
branched-chain amino acid
18313971
1.00E−43
Pyrobaculum
Aquifex aspartate aminotransferase
ABU57358


236
aminotransferase (ilvE)


aerophilum
B DNA.



[Pyrobaculum aerophilum].


237,
d-alanine aminotransferase
110834821
1.00E−55
Alcanivorax
Bacillus D-amino acid
AAY13560


238
[Alcanivorax borkumensis SK2]


borkumensis SK2
aminotransferase.


239,
d-alanine aminotransferase
110834821
2.00E−54
Alcanivorax
Bacillus D-amino acid
AAY13560


240
[Alcanivorax borkumensis SK2]


borkumensis SK2
aminotransferase.


241,
D-alanine aminotransferase
23098538
2.00E−53
Oceanobacillus
P. stutzeri 4 D-HPG AT outer
AEM18040


242
[Oceanobacillus iheyensis].


iheyensis
forward N-term PCR primer 1.


243,
D-alanine aminotransferase
23098538
2.00E−53
Oceanobacillus
P. stutzeri 4 D-HPG AT outer
AEM18040


244
[Oceanobacillus iheyensis].


iheyensis
forward N-term PCR primer 1.


245,
aromatic amino acid
104781758
1.00E−153
Pseudomonas
Klebsiella pneumoniae polypeptide
ABO61955


246
aminotransferase [Pseudomonas


entomophila L48
seqid 7178.



entomophila L48]


247,
D-amino acid aminotransferase
82745661
6.00E−99
Clostridium
Mutant Bacillus sphaericus dat
ABB08244


248
[Clostridium beijerincki


beijerincki NCIMB
protein.



NCIMB 8052]


8052



gi|82726488|gb|EAP61226.1|D-



amino acid aminotransferase



[Clostridium beijerincki



NCIMB 8052]


249,
putative aminotransferase
72162511
8.00E−29
Thermobifida fusca
Escherichia coli aminotransferase
AEK20408


250
[Thermobifida fusca YX]


YX
ilvE SEQ ID NO 2.


251,
D-amino-acid dehydrogenase
91775144
6.00E−17
Methylobacillus
Enterobacter cloacae protein amino
AEH60497


252
[Methylobacillus flagellatus


flagellatus KT
acid sequence - SEQ ID 5666.



KT]


253,
D-amino acid dehydrogenase;
32473614
1.00E−152
Rhodopirellula baltica
N. gonorrhoeae nucleotide sequence
ABP80542


254
small chain [Rhodopirellula


SH 1
SEQ ID 4691.



baltica SH 1]


255,
D-amino-acid dehydrogenase
91779297
0
Burkholderia
Glyphosate oxidoreductase gene
AAR22262


256
[Burkholderia xenovorans


xenovorans LB400
downstream flanking region.



LB400]


257,
putative D-amino-acid
146341475
1.00E−174
Bradyrhizobium sp.
Glyphosate oxidoreductase gene
AAR22262


258
dehydrogenase (DadA-like)


ORS278
downstream flanking region.



[Bradyrhizobium sp. ORS278]


259,
D-amino acid dehydrogenase
27377333
1.00E−163
Bradyrhizobium
P. aeruginosa virulence gene,
ADQ03060


260
small subunit [Bradyrhizobium


japonicum USDA 110
VIR14, protein.



japonicum USDA 110]


261,
D-amino-acid dehydrogenase
113871743
1.00E−166
Sinorhizobium
Glyphosate oxidoreductase gene
AAR22262


262
[Sinorhizobium medicae


medicae WSM419
downstream flanking region.



WSM419]



gi|113726415|gb|EAU07507.1|



D-amino-acid dehydrogenase



[Sinorhizobium medicae



WSM419]


263,
D-amino acid dehydrogenase,
13473406
1.00E−164
Mesorhizobium loti
P. aeruginosa virulence gene,
ADQ03060


264
small subunit [Mesorhizobium



VIR14, protein.



loti].


265,
Methylenetetrahydrofolate
92114170
1.00E−112
Chromohalobacter
Bacterial polypeptide #10001.
ADS25020


266
dehydrogenase (NADP+)


salexigens DSM 3043



[Chromohalobacter salexigens



DSM 3043]


267,
D-amino acid dehydrogenase
33596520
1.00E−172
Bordetella
P. aeruginosa virulence gene,
ADQ03060


268
small subunit [Bordetella


parapertussis 12822
VIR14, protein.



parapertussis 12822]


269,
D-amino acid dehydrogenase;
146280878
0
Pseudomonas stutzeri
P. aeruginosa virulence gene,
ADQ03060


270
small subunit [Pseudomonas


A1501
VIR14, protein.



stutzeri A1501]


271,
D-amino-acid dehydrogenase
73541345
1.00E−144
Ralstonia eutropha
Glyphosate oxidoreductase gene
AAR22262


272
[Ralstonia eutropha JMP134]


JMP134
downstream flanking region.


273,
D-amino acid dehydrogenase
21243478
1.00E−106
Xanthomonas
P. aeruginosa virulence gene,
ADQ03060


274
subunit [Xanthomonas


axonopodis pv. citri
VIR14, protein.



axonopodis pv. citri str. 306].


str. 306


275,
D-amino-acid dehydrogenase
92118208
1.00E−174
Nitrobacter
Glyphosate oxidoreductase gene
AAR22262


276
[Nitrobacter hamburgensis X14]


hamburgensis X14
downstream flanking region.


277,
D-amino-acid dehydrogenase
92118208
1.00E−170
Nitrobacter
Glyphosate oxidoreductase gene
AAR22262


278
[Nitrobacter hamburgensis X14]


hamburgensis X14
downstream flanking region.


279,
D-amino-acid dehydrogenase
86750758
1.00E−116
Rhodopseudomonas
Glyphosate oxidoreductase gene
AAR22262


280
[Rhodopseudomonas palustris


palustris HaA2
downstream flanking region.



HaA2]


281,
D-amino-acid dehydrogenase
121530396
1.00E−151
Ralstonia pickettii 12J
Glyphosate oxidoreductase gene
AAR22262


282
[Ralstonia pickettii 12J]



downstream flanking region.



gi|121302471|gb|EAX43440.1|



D-amino-acid dehydrogenase



[Ralstonia pickettii 12J]


283,
D-amino acid dehydrogenase
27377333
1.00E−158
Bradyrhizobium
P. aeruginosa virulence gene,
ADQ03060


284
small subunit [Bradyrhizobium


japonicum USDA 110
VIR14, protein.



japonicum USDA 110]


285,
D-amino acid dehydrogenase
86141912
2.00E−87
Flavobacterium sp.
M. catarrhalis protein #1.
ADL05210


286
[Flavobacterium sp. MED217]


MED217


287,
D-amino acid dehydrogenase,
87309573
1.00E−128
Blastopirellula marina
Glyphosate oxidoreductase gene
AAR22262


288
small chain [Blastopirellula


DSM 3645
downstream flanking region.



marina DSM 3645]



gi|87287337|gb|EAQ79237.1|



D-amino acid dehydrogenase,



small chain [Blastopirellula



marina DSM 3645]


289,
possible D-amino-acid
39936835
1.00E−120
Rhodopseudomonas
Glyphosate oxidoreductase gene
AAR22262


290
dehydrogenase


palustris CGA009
downstream flanking region.



[Rhodopseudomonas palustris



CGA009]


291,
D-amino acid dehydrogenase,
87309573
1.00E−136
Blastopirellula marina
P. aeruginosa virulence gene,
ADQ03060


292
small chain [Blastopirellula


DSM 3645
VIR14, protein.



marina DSM 3645]



gi|87287337|gb|EAQ79237.1|



D-amino acid dehydrogenase,



small chain [Blastopirellula



marina DSM 3645]


293,
D-amino acid dehydrogenase;
104781752
0
Pseudomonas
Glyphosate oxidoreductase gene
AAR22262


294
small subunit family protein


entomophila L48
downstream flanking region.



[Pseudomonas entomophila



L48]


295,
D-amino acid dehydrogenase
124009931
4.00E−86
Microscilla marina
Glyphosate oxidoreductase gene
AAR22262


296
small subunit, putative


ATCC 23134
downstream flanking region.



[Microscilla marina ATCC



23134]



gi|123984082|gb|EAY24455.1|



D-amino acid dehydrogenase



small subunit, putative



[Microscilla marina ATCC



23134]


297,
D-amino acid dehydrogenase;
146284421
1.00E−177
Pseudomonas stutzeri
Acinetobacter baumannii protein
ADA36279


298
small subunit [Pseudomonas


A1501
#19.



stutzeri A1501]


299,
D-amino acid dehydrogenase;
146284421
1.00E−176
Pseudomonas stutzeri
Acinetobacter baumannii protein
ADA36279


300
small subunit [Pseudomonas


A1501
#19.



stutzeri A1501]


301,
putative d-amino acid
116250556
1.00E−168
Rhizobium
Glyphosate oxidoreductase gene
AAR22262


302
dehydrogenase small subunit


leguminosarum bv.
downstream flanking region.



[Rhizobium leguminosarum bv.


viciae 3841



viciae 3841]


303,
D-amino-acid dehydrogenase
148553731
4.00E−90
Sphingomonas
P. aeruginosa virulence gene,
ADQ03060


304
[Sphingomonas wittichii RW1]


wittichii RW1
VIR14, protein.


305,
D-amino acid dehydrogenase
26247503
0
Escherichia coli
Enterobacter cloacae protein amino
AEH60497


306
small subunit [Escherichia coli


CFT073
acid sequence - SEQ ID 5666.



CFT073]


307,
putative d-amino acid
116250556
1.00E−129
Rhizobium
Glyphosate oxidoreductase gene
AAR22262


308
dehydrogenase small subunit


leguminosarum bv.
downstream flanking region.



[Rhizobium leguminosarum bv.


viciae 3841



viciae 3841]


309,
D-amino acid dehydrogenase
124009931
5.00E−98
Microscilla marina
H. pylori GHPO 1099 gene.
AAW98270


310
small subunit, putative


ATCC 23134



[Microscilla marina ATCC



23134]



gi|123984082|gb|EAY24455.1|



D-amino acid dehydrogenase



small subunit, putative



[Microscilla marina ATCC



23134]


311,
D-amino acid dehydrogenase
27377333
0
Bradyrhizobium
P. aeruginosa virulence gene,
ADQ03060


312
small subunit [Bradyrhizobium


japonicum USDA 110
VIR14, protein.



japonicum USDA 110]


313,
D-amino-acid dehydrogenase
86750758
1.00E−119
Rhodopseudomonas
Glyphosate oxidoreductase gene
AAR22262


314
[Rhodopseudomonas palustris


palustris HaA2
downstream flanking region.



HaA2]


315,
D-amino-acid dehydrogenase
73541345
1.00E−145
Ralstonia eutropha
Glyphosate oxidoreductase gene
AAR22262


316
[Ralstonia eutropha JMP134]


JMP134
downstream flanking region.


317,
D-amino acid dehydrogenase
88712395
5.00E−96
Flavobacteriales
M. catarrhalis protein #1.
ADL05210


318
[Flavobacteriales bacterium


bacterium HTCC2170



HTCC2170]



gi|88708933|gb|EAR01167.1|



D-amino acid dehydrogenase



[Flavobacteriales bacterium



HTCC2170]


319,
Enoyl-CoA
126727316
2.00E−96
Rhodobacterales
Bacterial polypeptide #10001.
ADN25932


320
hydratase/isomerase:3-


bacterium HTCC2150



hydroxyacyl-CoA



dehydrogenase, 3-hydroxyacyl-



CoA dehydrogenase, NAD-



binding protein



[Rhodobacterales bacterium



HTCC2150]



gi|126703311|gb|EBA02409.1|



Enoyl-CoA



hydratase/isomerase:3-



hydroxyacyl-CoA



dehydrogenase, 3-hydroxyac


321,
D-amino-acid dehydrogenase
121530396
1.00E−170
Ralstonia pickettii 12J
Glyphosate oxidoreductase gene
AAR22262


322
[Ralstonia pickettii 12J]



downstream flanking region.



gi|121302471|gb|EAX43440.1|



D-amino-acid dehydrogenase



[Ralstonia pickettii 12J]


323,
D-amino-acid dehydrogenase
126355875
0
Pseudomonas putida
Glyphosate oxidoreductase gene
AAR22262


324
[Pseudomonas putida GB-1]


GB-1
downstream flanking region.



gi|126320385|gb|EAZ71237.1|



D-amino-acid dehydrogenase



[Pseudomonas putida GB-1]


325,
D-amino-acid dehydrogenase
126356306
0
Pseudomonas putida
P. aeruginosa virulence gene,
ADQ03060


326
[Pseudomonas putida GB-1]


GB-1
VIR14, protein.



gi|126319114|gb|EAZ69967-1|



D-amino-acid dehydrogenase



[Pseudomonas putida GB-1]


327,
D-amino acid dehydrogenase
21243478
1.00E−112
Xanthomonas
P. aeruginosa virulence gene,
ADQ03060


328
subunit [Xanthomonas


axonopodis pv. citri
VIR14, protein.



axonopodis pv. citri str. 306].


str. 306


329,
D-amino acid dehydrogenase
88712395
4.00E−95
Flavobacteriales
H. pylori GHPO 1099 gene.
AAW98270


330
[Flavobacteriales bacterium


bacterium HTCC2170



HTCC2170]



gi|88708933|gb|EAR01167.1|



D-amino acid dehydrogenase



[Flavobacteriales bacterium



HTCC2170]


331,
D-amino acid dehydrogenase
27377333
0
Bradyrhizobium
P. aeruginosa virulence gene,
ADQ03060


332
small subunit [Bradyrhizobium


japonicum USDA 110
VIR14, protein.



japonicum USDA 110]


333,
Enoyl-CoA
126727316
2.00E−96
Rhodobacterales
Bacterial polypeptide #10001.
ADN25932


334
hydratase/isomerase:3-


bacterium HTCC2150



hydroxyacyl-CoA



dehydrogenase, 3-hydroxyacyl-



CoA dehydrogenase, NAD-



binding protein



[Rhodobacterales bacterium



HTCC2150]



gi|126703311|gb|EBA02409.1|



Enoyl-CoA



hydratase/isomerase:3-



hydroxyacyl-CoA



dehydrogenase, 3-hydroxyac


335,
D-amino-acid dehydrogenase
121530396
1.00E−170
Ralstonia pickettii 12J
Glyphosate oxidoreductase gene
AAR22262


336
[Ralstonia pickettii 12J]



downstream flanking region.



gi|121302471|gb|EAX43440.1|



D-amino-acid dehydrogenase



[Ralstonia pickettii 12J]


337,
D-amino-acid dehydrogenase
86750758
1.00E−114
Rhodopseudomonas
Glyphosate oxidoreductase gene
AAR22262


338
[Rhodopseudomonas palustris


palustris HaA2
downstream flanking region.



HaA2]


339,
D-amino acid dehydrogenase
124009931
1.00E−100
Microscilla marina
M. catarrhalis protein #1.
ADL05210


340
small subunit, putative


ATCC 23134



[Microscilla marina ATCC



23134]



gi|123984082|gb|EAY24455.1|



D-amino acid dehydrogenase



small subunit, putative



[Microscilla marina ATCC



23134]


341,
D-amino-acid dehydrogenase
121530396
1.00E−170
Ralstonia pickettii 12J
Glyphosate oxidoreductase gene
AAR22262


342
[Ralstonia pickettii 12J]



downstream flanking region.



gi|121302471|gb|EAX43440.1|



D-amino-acid dehydrogenase



[Ralstonia pickettii 12J]


343,
short-chain
146275754
2.00E−51
Novosphingobium
Bacterial polypeptide #10001.
ADS24609


344
dehydrogenase/reductase SDR


aromaticivorans DSM



[Novosphingobium


12444



aromaticivorans DSM 12444]


345,
D-amino-acid dehydrogenase
114570652
2.00E−91
Maricaulis maris
P. aeruginosa virulence gene,
ADQ03060


346
[Maricaulis maris MCS10]


MCS10
VIR14, protein.



gi|114341114|gb|ABI66394.1|



D-amino-acid dehydrogenase



[Maricaulis maris MCS10]


347,
D-amino-acid dehydrogenase
113871743
1.00E−152
Sinorhizobium
Glyphosate oxidoreductase gene
AAR22262


348
[Sinorhizobium medicae


medicae WSM419
downstream flanking region.



WSM419]



gi|113726415|gb|EAU07507.1|



D-amino-acid dehydrogenase



[Sinorhizobium medicae



WSM419]


349,
D-amino-acid dehydrogenase
86750758
1.00E−117
Rhodopseudomonas
Glyphosate oxidoreductase gene
AAR22262


350
[Rhodopseudomonas palustris


palustris HaA2
downstream flanking region.



HaA2]


351,
D-amino acid dehydrogenase;
32473614
1.00E−155
Rhodopirellula baltica
N. gonorrhoeae nucleotide sequence
ABP80542


352
small chain [Rhodopirellula


SH 1
SEQ ID 4691.



baltica SH 1]


353,
D-amino acid dehydrogenase
88712395
1.00E−88
Flavobacteriales
Bacterial polypeptide #19.
ADF07894


354
[Flavobacteriales bacterium


bacterium HTCC2170



HTCC2170]



gi|88708933|gb|EAR01167.1|



D-amino acid dehydrogenase



[Flavobacteriales bacterium



HTCC2170]


355,
aldehyde dehydrogenase family
108761092
2.00E−97
Myxococcus xanthus
Bacterial polypeptide #10001.
ADN25785


356
protein [Myxococcus xanthus


DK 1622



DK 1622]


357,
D-amino acid dehydrogenase
124009931
1.00E−96
Microscilla marina
M. catarrhalis protein #1.
ADL05210


358
small subunit, putative


ATCC 23134



[Microscilla marina ATCC



23134]



gi|123984082|gb|EAY24455.1|



D-amino acid dehydrogenase



small subunit, putative



[Microscilla marina ATCC



23134]


359,
D-amino-acid dehydrogenase
111019145
1.00E−163
Rhodococcus sp.
C glutamicum coding sequence
AAG93079


360
small subunit [Rhodococcus sp.


RHA1
fragment SEQ ID NO: 1935.



RHA1]


361,
D-amino-acid dehydrogenase
111019145
1.00E−163
Rhodococcus sp.
C glutamicum coding sequence
AAG93079


362
small subunit [Rhodococcus sp.


RHA1
fragment SEQ ID NO: 1935.



RHA1]


363,
D-amino-acid dehydrogenase
111019145
1.00E−163
Rhodococcus sp.
C glutamicum coding sequence
AAG93079


364
small subunit [Rhodococcus sp.


RHA1
fragment SEQ ID NO: 1935.



RHA1]


365,
D-amino acid dehydrogenase
27377333
0
Bradyrhizobium
P. aeruginosa virulence gene,
ADQ03060


366
small subunit [Bradyrhizobium


japonicum USDA 110
VIR14, protein.



japonicum USDA 110]


367,
D-amino acid dehydrogenase
134093986
0
Herminiimonas
P. aeruginosa virulence gene,
ADQ03060


368
small subunit [Herminiimonas


arsenicoxydans
VIR14, protein.



arsenicoxydans]



gi|133737889|emb|CAL60934.1|



D-amino acid dehydrogenase



small subunit [Herminiimonas



arsenicoxydans]


369,
D-amino acid dehydrogenase
124009931
1.00E−101
Microscilla marina
H. pylori GHPO 1099 gene.
AAW98270


370
small subunit, putative


ATCC 23134



[Microscilla marina ATCC



23134]



gi|123984082|gb|EAY24455.1|



D-amino acid dehydrogenase



small subunit, putative



[Microscilla marina ATCC



23134]


371,
D-amino acid dehydrogenase
27377333
0
Bradyrhizobium
P. aeruginosa virulence gene,
ADQ03060


372
small subunit [Bradyrhizobium


japonicum USDA 110
VIR14, protein.



japonicum USDA 110]


373,
D-amino-acid dehydrogenase
73541345
1.00E−136
Ralstonia eutropha
Glyphosate oxidoreductase gene
AAR22262


374
[Ralstonia eutropha JMP134]


JMP134
downstream flanking region.


375,
D-amino acid dehydrogenase
91217360
3.00E−98
Psychroflexus torquis
Acinetobacter baumannii protein
ADA33588


376
[Psychroflexus torquis ATCC


ATCC 700755
#19.



700755]



gi|91184468|gb|EAS70851.1|D-



amino acid dehydrogenase



[Psychroflexus torquis ATCC



700755]


377,
D-amino acid dehydrogenase
88712395
1.00E−122
Flavobacteriales
M. catarrhalis protein #1.
ADL05210


378
[Flavobacteriales bacterium


bacterium HTCC2170



HTCC2170]



gi|88708933|gb|EAR01167.1|



D-amino acid dehydrogenase



[Flavobacteriales bacterium



HTCC2170]


379,
D-amino-acid dehydrogenase
114570652
8.00E−91
Maricaulis maris
P. aeruginosa virulence gene,
ADQ03060


380
[Maricaulis maris MCS10]


MCS10
VIR14, protein.



gi|114341114|gb|ABI66394.1|



D-amino-acid dehydrogenase



[Maricaulis maris MCS10]


381,
D-amino-acid dehydrogenase
111019145
1.00E−163
Rhodococcus sp.
C glutamicum coding sequence
AAG93079


382
small subunit [Rhodococcus sp.


RHA1
fragment SEQ ID NO: 1935.



RHA1]


383,
D-amino acid dehydrogenase,
13473406
0
Mesorhizobium loti
P. aeruginosa virulence gene,
ADQ03060


384
small subunit [Mesorhizobium



VIR14, protein.



loti].


385,
D-amino acid dehydrogenase
124009931
5.00E−99
Microscilla marina
H. pylori GHPO 1099 gene.
AAW98270


386
small subunit, putative


ATCC 23134



[Microscilla marina ATCC



23134]



gi|123984082|gb|EAY24455.1|



D-amino acid dehydrogenase



small subunit, putative



[Microscilla marina ATCC



23134]


387,
D-amino acid dehydrogenase,
13474742
0
Mesorhizobium loti
Pseudomonas aeruginosa
ABO75104


388
small subunit [Mesorhizobium



polypeptide #3.



loti].


389,
D-amino acid dehydrogenase
134093986
0
Herminiimonas
Klebsiella pneumoniae polypeptide
ABO67618


390
small subunit [Herminiimonas


arsenicoxydans
seqid 7178.



arsenicoxydans]



gi|133737889|emb|CAL60934.1|



D-amino acid dehydrogenase



small subunit [Herminiimonas



arsenicoxydans]


391,
D-amino acid dehydrogenase,
87309573
1.00E−139
Blastopirellula marina
N. gonorrhoeae nucleotide sequence
ABP80542


392
small chain [Blastopirellula


DSM 3645
SEQ ID 4691.



marina DSM 3645]



gi|87287337|gb|EAQ79237.1|



D-amino acid dehydrogenase,



small chain [Blastopirellula



marina DSM 3645]


393,
probable D-amino acid
119897258
1.00E−111
Azoarcus sp. BH72
Pseudomonas aeruginosa
ABO84309


394
dehydrogenase small subunit



polypeptide #3.



[Azoarcus sp. BH72]


395,
D-amino-acid dehydrogenase
73541345
0
Ralstonia eutropha
Glyphosate oxidoreductase gene
AAR22262


396
[Ralstonia eutropha JMP134]


JMP134
downstream flanking region.


397,
D-amino-acid dehydrogenase
86750758
1.00E−121
Rhodopseudomonas
Glyphosate oxidoreductase gene
AAR22262


398
[Rhodopseudomonas palustris


palustris HaA2
downstream flanking region.



HaA2]


399,
D-amino acid dehydrogenase
124009931
2.00E−97
Microscilla marina
H. pylori GHPO 1099 gene.
AAW98270


400
small subunit, putative


ATCC 23134



[Microscilla marina ATCC



23134]



gi|123984082|gb|EAY24455.1|



D-amino acid dehydrogenase



small subunit, putative



[Microscilla marina ATCC



23134]


401,
D-amino-acid dehydrogenase
114570652
3.00E−66
Maricaulis maris
M. catarrhalis protein #1.
ADL05210


402
[Maricaulis maris MCS10]


MCS10



gi|114341114|gb|ABI66394.1|



D-amino-acid dehydrogenase



[Maricaulis maris MCS10]


403,
D-amino acid dehydrogenase
124009931
1.00E−111
Microscilla marina
H. pylori GHPO 1099 gene.
AAW98270


404
small subunit, putative


ATCC 23134



[Microscilla marina ATCC



23134]



gi|123984082|gb|EAY24455.1|



D-amino acid dehydrogenase



small subunit, putative



[Microscilla marina ATCC



23134]


405,
D-amino acid dehydrogenase
88806240
2.00E−95
Robiginitalea
Glyphosate oxidoreductase gene
AAR22262


406
[Robiginitalea biformata


biformata HTCC2501
downstream flanking region.



HTCC2501]



gi|88783849|gb|EAR15020.1|



D-amino acid dehydrogenase



[Robiginitalea biformata



HTCC2501]


407,
D-amino acid dehydrogenase
27377333
0
Bradyrhizobium
P. aeruginosa virulence gene,
ADQ03060


408
small subunit [Bradyrhizobium


japonicum USDA 110
VIR14, protein.



japonicum USDA 110]


409,
D-amino acid dehydrogenase
124009931
2.00E−98
Microscilla marina
P. aeruginosa virulence gene,
ADQ03060


410
small subunit, putative


ATCC 23134
VIR14, protein.



[Microscilla marina ATCC



23134]



gi|123984082|gb|EAY24455.1|



D-amino acid dehydrogenase



small subunit, putative



[Microscilla marina ATCC



23134]


411,
ketoglutarate semialdehyde
104783034
1.00E−103
Pseudomonas
Bacterial polypeptide #10001.
ADN25785


412
dehydrogenase [Pseudomonas


entomophila L48



entomophila L48]


413,
D-amino-acid dehydrogenase
86750758
1.00E−119
Rhodopseudomonas
Glyphosate oxidoreductase gene
AAR22262


414
[Rhodopseudomonas palustris


palustris HaA2
downstream flanking region.



HaA2]


415,
D-amino-acid dehydrogenase
86750758
1.00E−125
Rhodopseudomonas
Glyphosate oxidoreductase gene
AAR22262


416
[Rhodopseudomonas palustris


palustris HaA2
downstream flanking region.



HaA2]


417,
AGR_L_3050p [Agrobacterium
15891640
1.00E−179
Agrobacterium
P. aeruginosa virulence gene,
ADQ03060


418
tumefaciens].


tumefaciens
VIR14, protein.


419,
D-amino-acid dehydrogenase
91786059
0
Polaromonas sp.
Photorhabdus luminescens protein
ABM69115


420
[Polaromonas sp. JS666]


JS666
sequence #59.


421,
D-amino-acid dehydrogenase
108804652
1.00E−108
Rubrobacter
C glutamicum coding sequence
AAG93079


422
[Rubrobacter xylanophilus


xylanophilus DSM
fragment SEQ ID NO: 1935.



DSM 9941]


9941


423,
D-amino acid dehydrogenase
124009931
4.00E−94
Microscilla marina
H. pylori GHPO 1099 gene.
AAW98270


424
small subunit, putative


ATCC 23134



[Microscilla marina ATCC



23134]



gi|123984082|gb|EAY24455.1|



D-amino acid dehydrogenase



small subunit, putative



[Microscilla marina ATCC



23134]


425,
D-amino-acid dehydrogenase
121530396
1.00E−122
Ralstonia pickettii 12J
Glyphosate oxidoreductase gene
AAR22262


426
[Ralstonia pickettii 12J]



downstream flanking region.



gi|121302471|gb|EAX43440.1|



D-amino-acid dehydrogenase



[Ralstonia pickettii 12J]


427,
D-amino-acid dehydrogenase
92118208
0
Nitrobacter
Glyphosate oxidoreductase gene
AAR22262


428
[Nitrobacter hamburgensis X14]


hamburgensis X14
downstream flanking region.


429,
D-amino acid dehydrogenase
124009931
2.00E−97
Microscilla marina
Glyphosate oxidoreductase gene
AAR22262


430
small subunit, putative


ATCC 23134
downstream flanking region.



[Microscilla marina ATCC



23134]



gi|123984082|gb|EAY24455.1|



D-amino acid dehydrogenase



small subunit, putative



[Microscilla marina ATCC



23134]


431,
D-amino acid dehydrogenase
124009931
1.00E−119
Microscilla marina
Glyphosate oxidoreductase gene
AAR22262


432
small subunit, putative


ATCC 23134
downstream flanking region.



[Microscilla marina ATCC



23134]



gi|123984082|gb|EAY24455.1|



D-amino acid dehydrogenase



small subunit, putative



[Microscilla marina ATCC



23134]


433,
D-amino-acid dehydrogenase
86750758
1.00E−123
Rhodopseudomonas
Glyphosate oxidoreductase gene
AAR22262


434
[Rhodopseudomonas palustris


palustris HaA2
downstream flanking region.



HaA2]


435,
D-amino-acid dehydrogenase
86750758
1.00E−121
Rhodopseudomonas
Glyphosate oxidoreductase gene
AAR22262


436
[Rhodopseudomonas palustris


palustris HaA2
downstream flanking region.



HaA2]


437,
carbon monoxide
56697247
1.00E−66
Silicibacter pomeroyi
Bacterial polypeptide #10001.
ADS27598


438
dehydrogenase G protein;


DSS-3



putative [Silicibacter pomeroyi



DSS-3]


439,
carbon monoxide
56697248
1.00E−87
Silicibacter pomeroyi
DNA encoding novel human
ABG25235


440
dehydrogenase F protein


DSS-3
diagnostic protein #20574.



[Silicibacter pomeroyi DSS-3]


441,
carbon monoxide
56697249
1.00E−171
Silicibacter pomeroyi
Human adhesion molecule protein
AAU75888


442
dehydrogenase E protein


DSS-3
AD6/CAA17374.1.



[Silicibacter pomeroyi DSS-3]


443,
D-amino-acid dehydrogenase
113871743
1.00E−150
Sinorhizobium
Glyphosate oxidoreductase gene
AAR22262


444
[Sinorhizobium medicae


medicae WSM419
downstream flanking region.



WSM419]



gi|113726415|gb|EAU07507.1|



D-amino-acid dehydrogenase



[Sinorhizobium medicae



WSM419]


445,
D-amino acid dehydrogenase
126646463
1.00E−175
Algoriphagus sp. PR1
H. pylori GHPO 1099 gene.
AAW98270


446
[Algoriphagus sp. PR1]



gi|126578095|gb|EAZ82315.1|



D-amino acid dehydrogenase



[Algoriphagus sp. PR1]


447,
D-amino-acid dehydrogenase
119877440
0
Stenotrophomonas
P. aeruginosa virulence gene,
ADQ03060


448
[Stenotrophomonas maltophilia


maltophilia R551-3
VIR14, protein.



R551-3]



gi|119820020|gb|EAX22641.1|



D-amino-acid dehydrogenase



[Stenotrophomonas maltophilia



R551-3]


449,
D-amino-acid dehydrogenase
121530396
1.00E−104
Ralstonia pickettii 12J
Glyphosate oxidoreductase gene
AAR22262


450
[Ralstonia pickettii 12J]



downstream flanking region.



gi|121302471|gb|EAX43440.1|



D-amino-acid dehydrogenase



[Ralstonia pickettii 12J]


451,
D-amino-acid dehydrogenase
121530396
1.00E−143
Ralstonia pickettii 12J
Glyphosate oxidoreductase gene
AAR22262


452
[Ralstonia pickettii 12J]



downstream flanking region.



gi|121302471|gb|EAX43440.1|



D-amino-acid dehydrogenase



[Ralstonia pickettii 12J]


453,
D-amino-acid dehydrogenase
113871743
1.00E−125
Sinorhizobium
Glyphosate oxidoreductase gene
AAR22262


454
[Sinorhizobium medicae


medicae WSM419
downstream flanking region.



WSM419]



gi|113726415|gb|EAU07507.1|



D-amino-acid dehydrogenase



[Sinorhizobium medicae



WSM419]


455,
D-amino acid dehydrogenase
124009931
1.00E−104
Microscilla marina
H. pylori GHPO 1099 gene.
AAW98270


456
small subunit, putative


ATCC 23134



[Microscilla marina ATCC



23134]



gi|123984082|gb|EAY24455.1|



D-amino acid dehydrogenase



small subunit, putative



[Microscilla marina ATCC



23134]


457,
D-amino acid dehydrogenase
88712395
1.00E−173
Flavobacteriales
M. catarrhalis protein #1.
ADL05210


458
[Flavobacteriales bacterium


bacterium HTCC2170



HTCC2170]



gi|88708933|gb|EAR01167.1|



D-amino acid dehydrogenase



[Flavobacteriales bacterium



HTCC2170]


459,
D-amino acid dehydrogenase
126666221
0
Marinobacter sp.
Acinetobacter baumannii protein
ADA36279


460
small subunit [Marinobacter sp.


ELB17
#19.



ELB17]



gi|126629543|gb|EBA00161.1|



D-amino acid dehydrogenase



small subunit [Marinobacter sp.



ELB17]


461,
Short-chain
67154056
1.00E−109
Azotobacter vinelandii
Klebsiella pneumoniae polypeptide
ABO66363


462
dehydrogenase/reductase SDR


AvOP
seqid 7178.



[Azotobacter vinelandii AvOP]


463,
D-amino acid dehydrogenase
91217360
1.00E−167
Psychroflexus torquis
H. pylori GHPO 1099 gene.
AAW98270


464
[Psychroflexus torquis ATCC


ATCC 700755



700755]



gi|91184468|gb|EAS70851.1|D-



amino acid dehydrogenase



[Psychroflexus torquis ATCC



700755]


465,
dehydrogenase [Geobacillus
56420489
4.00E−18
Geobacillus
Hyperthermophile Methanopyrus
ADM25691


466
kaustophilus HTA426]


kaustophilus HTA426
kandleri protein #28.


467,
D-amino-acid dehydrogenase
73541345
1.00E−133
Ralstonia eutropha
Glyphosate oxidoreductase gene
AAR22262


468
[Ralstonia eutropha JMP134]


JMP134
downstream flanking region.


469,
putative d-amino acid
116250556
1.00E−166
Rhizobium
Glyphosate oxidoreductase gene
AAR22262


470
dehydrogenase small subunit


leguminosarum bv.
downstream flanking region.



[Rhizobium leguminosarum bv.


viciae 3841



viciae 3841]


471,
D-amino acid dehydrogenase
26247503
0
Escherichia coli
Enterobacter cloacae protein amino
AEH60497


472
small subunit [Escherichia coli


CFT073
acid sequence - SEQ ID 5666.



CFT073]


473,
D-amino-acid dehydrogenase
113871743
1.00E−159
Sinorhizobium
Glyphosate oxidoreductase gene
AAR22262


474
[Sinorhizobium medicae


medicae WSM419
downstream flanking region.



WSM419]



gi|113726415|gb|EAU07507.1|



D-amino-acid dehydrogenase



[Sinorhizobium medicae



WSM419]


475,
D-amino-acid dehydrogenase
114570652
1.00E−155
Maricaulis maris
P. aeruginosa virulence gene,
ADQ03060


476
[Maricaulis maris MCS10]


MCS10
VIR14, protein.



gi|114341114|gb|ABI66394.1|



D-amino-acid dehydrogenase



[Maricaulis maris MCS10]


477,
D-amino acid dehydrogenase
88712395
4.00E−85
Flavobacteriales
P. aeruginosa virulence gene,
ADQ03060


478
[Flavobacteriales bacterium


bacterium HTCC2170
VIR14, protein.



HTCC2170]



gi|88708933|gb|EAR01167.1|



D-amino acid dehydrogenase



[Flavobacteriales bacterium



HTCC2170]


479,
D-amino acid dehydrogenase
88712395
4.00E−85
Flavobacteriales
P. aeruginosa virulence gene,
ADQ03060


480
[Flavobacteriales bacterium


bacterium HTCC2170
VIR14, protein.



HTCC2170]



gi|88708933|gb|EAR01167.1|



D-amino acid dehydrogenase



[Flavobacteriales bacterium



HTCC2170]


481,
D-amino acid dehydrogenase
88712395
1.00E−175
Flavobacteriales
M. catarrhalis protein #1.
ADL05210


482
[Flavobacteriales bacterium


bacterium HTCC2170



HTCC2170]



gi|88708933|gb|EAR01167.1|



D-amino acid dehydrogenase



[Flavobacteriales bacterium



HTCC2170]


483,
D-amino acid dehydrogenase
134093986
0
Herminiimonas
P. aeruginosa virulence gene,
ADQ03060


484
small subunit [Herminiimonas


arsenicoxydans
VIR14, protein.



arsenicoxydans]



gi|133737889|emb|CAL60934.1|



D-amino acid dehydrogenase



small subunit [Herminiimonas



arsenicoxydans]


485,
D-amino acid dehydrogenase
27377333
1.00E−167
Bradyrhizobium
P. aeruginosa virulence gene,
ADQ03060


486
small subunit [Bradyrhizobium


japonicum USDA 110
VIR14, protein.



japonicum USDA 110]


487,
D-amino-acid dehydrogenase
113871743
1.00E−129
Sinorhizobium
Glyphosate oxidoreductase gene
AAR22262


488
[Sinorhizobium medicae


medicae WSM419
downstream flanking region.



WSM419]



gi|113726415|gb|EAU07507.1|



D-amino-acid dehydrogenase



[Sinorhizobium medicae



WSM419]


489,
D-amino-acid dehydrogenase
115523700
1.00E−123
Rhodopseudomonas
Glyphosate oxidoreductase gene
AAR22262


490
[Rhodopseudomonas palustris


palustris BisA53
downstream flanking region.



BisA53]


491,
D-amino-acid dehydrogenase
114570652
1.00E−78
Maricaulis maris
P. aeruginosa virulence gene,
ADQ03060


492
[Maricaulis maris MCS10]


MCS10
VIR14, protein.



gi|114341114|gb|ABI66394.1|



D-amino-acid dehydrogenase



[Maricaulis maris MCS10]


493,
D-amino acid dehydrogenase
124009931
6.00E−90
Microscilla marina
C glutamicum coding sequence
AAG93079


494
small subunit, putative


ATCC 23134
fragment SEQ ID NO: 1935.



[Microscilla marina ATCC



23134]



gi|123984082|gb|EAY24455.1|



D-amino acid dehydrogenase



small subunit, putative



[Microscilla marina ATCC



23134]


495,
D-amino-acid dehydrogenase
115523700
1.00E−112
Rhodopseudomonas
Glyphosate oxidoreductase gene
AAR22262


496
[Rhodopseudomonas palustris


palustris BisA53
downstream flanking region.



BisA53]


497,
D-amino-acid dehydrogenase
113871743
1.00E−129
Sinorhizobium
Glyphosate oxidoreductase gene
AAR22262


498
[Sinorhizobium medicae


medicae WSM419
downstream flanking region.



WSM419]



gi|113726415|gb|EAU07507.1|



D-amino-acid dehydrogenase



[Sinorhizobium medicae



WSM419]


499,
D-amino-acid dehydrogenase
115523700
1.00E−112
Rhodopseudomonas
Glyphosate oxidoreductase gene
AAR22262


500
[Rhodopseudomonas palustris


palustris BisA53
downstream flanking region.



BisA53]


501,
delta-1-pyrroline-5-carboxylate
68535524
1.00E−174
Corynebacterium
Corynebacterium glutamicum MP
AAB79787


502
dehydrogenase


jeikeium K411
protein sequence SEQ ID NO: 1148.



[Corynebacterium jeikeium



K411]


503,
D-amino acid dehydrogenase,
87309573
1.00E−129
Blastopirellula marina
C glutamicum coding sequence
AAG93079


504
small chain [Blastopirellula


DSM 3645
fragment SEQ ID NO: 1935.



marina DSM 3645]



gi|87287337|gb|EAQ79237.1|



D-amino acid dehydrogenase,



small chain [Blastopirellula



marina DSM 3645]


505,
D-amino acid dehydrogenase,
87309573
1.00E−127
Blastopirellula marina
P. aeruginosa virulence gene,
ADQ03060


506
small chain [Blastopirellula


DSM 3645
VIR14, protein.



marina DSM 3645]



gi|87287337|gb|EAQ79237.1|



D-amino acid dehydrogenase,



small chain [Blastopirellula



marina DSM 3645]


507,
D-amino-acid dehydrogenase
92118208
1.00E−174
Nitrobacter
Glyphosate oxidoreductase gene
AAR22262


508
[Nitrobacter hamburgensis X14]


hamburgensis X14
downstream flanking region.


509,
D-amino-acid dehydrogenase
86750758
1.00E−115
Rhodopseudomonas
Glyphosate oxidoreductase gene
AAR22262


510
[Rhodopseudomonas palustris


palustris HaA2
downstream flanking region.



HaA2]


511,
D-amino-acid dehydrogenase
73541345
1.00E−166
Ralstonia eutropha
Glyphosate oxidoreductase gene
AAR22262


512
[Ralstonia eutropha JMP134]


JMP134
downstream flanking region.


513,
D-amino acid dehydrogenase
134093986
0
Herminiimonas
P. aeruginosa virulence gene,
ADQ03060


514
small subunit [Herminiimonas


arsenicoxydans
VIR14, protein.



arsenicoxydans]



gi|133737889|emb|CAL60934.1|



D-amino acid dehydrogenase



small subunit [Herminiimonas



arsenicoxydans]


515,
D-amino acid dehydrogenase;
146284421
1.00E−177
Pseudomonas stutzeri
Acinetobacter baumannii protein
ADA36279


516
small subunit [Pseudomonas


A1501
#19.



stutzeri A1501]


517,
D-amino acid dehydrogenase
126646463
1.00E−110
Algoriphagus sp. PR1
Acinetobacter baumannii protein
ADA33588


518
[Algoriphagus sp. PR1]



#19.



gi|126578095|gb|EAZ82315.1|



D-amino acid dehydrogenase



[Algoriphagus sp. PR1]


519,
D-amino acid dehydrogenase
88712395
3.00E−98
Flavobacteriales
N. gonorrhoeae nucleotide sequence
ABP80542


520
[Flavobacteriales bacterium


bacterium HTCC2170
SEQ ID 4691.



HTCC2170]



gi|88708933|gb|EAR01167.1|



D-amino acid dehydrogenase



[Flavobacteriales bacterium



HTCC2170]


521,
D-amino-acid dehydrogenase
111019145
0
Rhodococcus sp.
C glutamicum coding sequence
AAG93079


522
small subunit [Rhodococcus sp.


RHA1
fragment SEQ ID NO: 1935.



RHA1]


523,
D-amino acid dehydrogenase
126646463
7.00E−87
Algoriphagus sp. PR1
H. pylori GHPO 1099 gene.
AAW98270


524
[Algoriphagus sp. PR1]



gi|126578095|gb|EAZ82315.1|



D-amino acid dehydrogenase



[Algoriphagus sp. PR1]


525,
D-amino-acid dehydrogenase
121530396
1.00E−146
Ralstonia pickettii 12J
Glyphosate oxidoreductase gene
AAR22262


526
[Ralstonia pickettii 12J]



downstream flanking region.



gi|121302471|gb|EAX43440.1|



D-amino-acid dehydrogenase



[Ralstonia pickettii 12J]


527,
putative d-amino acid
116250556
0
Rhizobium
Glyphosate oxidoreductase gene
AAR22262


528
dehydrogenase small subunit


leguminosarum bv.
downstream flanking region.



[Rhizobium leguminosarum bv.


viciae 3841



viciae 3841]


529,
D-amino-acid dehydrogenase
92118208
1.00E−116
Nitrobacter
Glyphosate oxidoreductase gene
AAR22262


530
[Nitrobacter hamburgensis X14]


hamburgensis X14
downstream flanking region.


531,
probable D-amino acid
149824671
1.00E−150
Limnobacter sp.
P. aeruginosa virulence gene,
ADQ03060


532
dehydrogenase subunit


MED105
VIR14, protein.



[Limnobacter sp. MED105]


533,
D-amino acid dehydrogenase
88712395
3.00E−88
Flavobacteriales
M. catarrhalis protein #1.
ADL05210


534
[Flavobacteriales bacterium


bacterium HTCC2170



HTCC2170]



gi|88708933|gb|EAR01167.1|



D-amino acid dehydrogenase



[Flavobacteriales bacterium



HTCC2170]


535,
Aldehyde dehydrogenase
73537548
1.00E−143
Ralstonia eutropha
Bacterial polypeptide #10001.
ADN25785


536
[Ralstonia eutropha JMP134]


JMP134


537,
D-amino-acid dehydrogenase
73541345
1.00E−136
Ralstonia eutropha
Glyphosate oxidoreductase gene
AAR22262


538
[Ralstonia eutropha JMP134]


JMP134
downstream flanking region.


539,
D-amino-acid dehydrogenase
115359189
0
Burkholderia cepacia
Glyphosate oxidoreductase gene
AAR22262


540
[Burkholderia cepacia AMMD]


AMMD
downstream flanking region.


541,
D-amino acid dehydrogenase
21243478
1.00E−139
Xanthomonas
P. aeruginosa virulence gene,
ADQ03060


542
subunit [Xanthomonas


axonopodis pv. citri
VIR14, protein.



axonopodis pv. citri str. 306].


str. 306


543,
D-amino acid dehydrogenase
124009931
1.00E−107
Microscilla marina
H. pylori GHPO 1099 gene.
AAW98270


544
small subunit, putative


ATCC 23134



[Microscilla marina ATCC



23134]



gi|123984082|gb|EAY24455.1|



D-amino acid dehydrogenase



small subunit, putative



[Microscilla marina ATCC



23134]


545,
D-amino-acid dehydrogenase
86750758
1.00E−117
Rhodopseudomonas
Glyphosate oxidoreductase gene
AAR22262


546
[Rhodopseudomonas palustris


palustris HaA2
downstream flanking region.



HaA2]


547,
D-amino acid dehydrogenase
88712395
3.00E−86
Flavobacteriales
Photorhabdus luminescens protein
ABM69115


548
[Flavobacteriales bacterium


bacterium HTCC2170
sequence #59.



HTCC2170]



gi|88708933|gb|EAR01167.1|



D-amino acid dehydrogenase



[Flavobacteriales bacterium



HTCC2170]


549,
probable D-amino acid
149824671
1.00E−146
Limnobacter sp.
P. aeruginosa virulence gene,
ADQ03060


550
dehydrogenase subunit


MED105
VIR14, protein.



[Limnobacter sp. MED105]


551,
delta-1-pyrroline-5-carboxylate
68535524
0
Corynebacterium
Corynebacterium glutamicum MP
AAB79787


552
dehydrogenase


jeikeium K411
protein sequence SEQ ID NO: 1148.



[Corynebacterium jeikeium



K411]


553,
D-amino-acid dehydrogenase
115523700
1.00E−12
Rhodopseudomonas
Glyphosate oxidoreductase gene
AAR22262


554
[Rhodopseudomonas palustris


palustris BisA53
downstream flanking region.



BisA53]


555,
D-amino-acid dehydrogenase
92118208
1.00E−118
Nitrobacter
Glyphosate oxidoreductase gene
AAR22262


556
[Nitrobacter hamburgensis X14]


hamburgensis X14
downstream flanking region.


557,
D-amino-acid dehydrogenase
113871743
1.00E−132
Sinorhizobium
Glyphosate oxidoreductase gene
AAR22262


558
[Sinorhizobium medicae


medicae WSM419
downstream flanking region.



WSM419]



gi|113726415|gb|EAU07507.1|



D-amino-acid dehydrogenase



[Sinorhizobium medicae



WSM419]


559,
D-amino-acid dehydrogenase
113871743
1.00E−132
Sinorhizobium
Glyphosate oxidoreductase gene
AAR22262


560
[Sinorhizobium medicae


medicae WSM419
downstream flanking region.



WSM419]



gi|113726415|gb|EAU07507.1|



D-amino-acid dehydrogenase



[Sinorhizobium medicae



WSM419]


561,
NADH dehydrogenase
21244546
1.00E−143
Xanthomonas
M. xanthus protein sequence, seq id
ABM91806


562
[Xanthomonas axonopodis pv.


axonopodis pv. citri
9726.



citri str. 306].


str. 306


563,
short chain dehydrogenase
73541108
3.00E−66
Ralstonia eutropha
M. xanthus protein sequence, seq id
ABM96904


564
[Ralstonia eutropha JMP134]


JMP134
9726.


565,
D-amino-acid dehydrogenase
115523700
1.00E−112
Rhodopseudomonas
Glyphosate oxidoreductase gene
AAR22262


566
[Rhodopseudomonas palustris


palustris BisA53
downstream flanking region.



BisA53]


567,
D-amino-acid dehydrogenase
1SEQ ID
0
Acidovorax avenae
P. aeruginosa virulence gene,
ADQ03060


568
[Acidovorax avenae subsp.
NO: 9288839

subsp. citrulli
VIR14, protein.



citrulli AAC00-1]


AAC00-1



gi|120587303|gb|ABM30743.1|



D-amino-acid dehydrogenase



[Acidovorax avenae subsp.



citrulli AAC00-1]


569,
D-amino-acid dehydrogenase
114570652
8.00E−91
Maricaulis maris
P. aeruginosa virulence gene,
ADQ03060


570
[Maricaulis maris MCS10]


MCS10
VIR14, protein.



gi|114341114|gb|ABI66394.1|



D-amino-acid dehydrogenase



[Maricaulis maris MCS10]


571,
AGR_L_3050p [Agrobacterium
15891640
1.00E−180
Agrobacterium
P. aeruginosa virulence gene,
ADQ03060


572
tumefaciens].


tumefaciens
VIR14, protein.


573,
D-amino acid dehydrogenase
88806240
5.00E−85
Robiginitalea
Enterobacter cloacae protein amino
AEH60497


574
[Robiginitalea biformata


biformata HTCC2501
acid sequence - SEQ ID 5666.



HTCC2501]



gi|88783849|gb|EAR15020.1|



D-amino acid dehydrogenase



[Robiginitalea biformata



HTCC2501]


575,
Aldehyde dehydrogenase
72384235
1.00E−141
Ralstonia eutropha
Bacterial polypeptide #10001.
ADN22241


576
[Ralstonia eutropha JMP134]


JMP134


577,
putative d-amino acid
116250556
1.00E−166
Rhizobium
Glyphosate oxidoreductase gene
AAR22262


578
dehydrogenase small subunit


leguminosarum bv.
downstream flanking region.



[Rhizobium leguminosarum bv.


viciae 3841



viciae 3841]


579,
D-amino-acid dehydrogenase;
86361166
0
Rhizobium etli CFN
P. aeruginosa virulence gene,
ADQ03060


580
small subunit protein


42
VIR14, protein.



[Rhizobium etli CFN 42]


581,
D-amino-acid dehydrogenase
73541345
1.00E−136
Ralstonia eutropha
Glyphosate oxidoreductase gene
AAR22262


582
[Ralstonia eutropha JMP134]


JMP134
downstream flanking region.


583,
D-amino-acid dehydrogenase
91779297
0
Burkholderia
Glyphosate oxidoreductase gene
AAR22262


584
[Burkholderia xenovorans


xenovorans LB400
downstream flanking region.



LB400]


585,
D-amino-acid dehydrogenase
121603011
0
Polaromonas
Photorhabdus luminescens protein
ABM69115


586
[Polaromonas


naphthalenivorans CJ2
sequence #59.



naphthalenivorans CJ2]


587,
D-amino acid dehydrogenase;
104781752
1.00E−139
Pseudomonas
Glyphosate oxidoreductase gene
AAR22262


588
small subunit family protein


entomophila L48
downstream flanking region.



[Pseudomonas entomophila



L48]


589,
D-amino-acid dehydrogenase
111019145
0
Rhodococcus sp.
C glutamicum coding sequence
AAG93079


590
small subunit [Rhodococcus sp.


RHA1
fragment SEQ ID NO: 1935.



RHA1]


591,
D-amino-acid dehydrogenase
113871743
1.00E−145
Sinorhizobium
Glyphosate oxidoreductase gene
AAR22262


592
[Sinorhizobium medicae


medicae WSM419
downstream flanking region.



WSM419]



gi|113726415|gb|EAU07507.1|



D-amino-acid dehydrogenase



[Sinorhizobium medicae



WSM419]


593,
D-amino-acid dehydrogenase
86750758
1.00E−118
Rhodopseudomonas
Glyphosate oxidoreductase gene
AAR22262


594
[Rhodopseudomonas palustris


palustris HaA2
downstream flanking region.



HaA2]


595,
D-amino-acid dehydrogenase
92118208
0
Nitrobacter
Glyphosate oxidoreductase gene
AAR22262


596
[Nitrobacter hamburgensis X14]


hamburgensis X14
downstream flanking region.


597,
D-amino acid dehydrogenase
34497369
0
Chromobacterium
P. aeruginosa virulence gene,
ADQ03060


598
small subunit


violaceum ATCC
VIR14, protein.



[Chromobacterium violaceum


12472



ATCC 12472]


599,
D-amino-acid dehydrogenase;
86361166
0
Rhizobium etli CFN
P. aeruginosa virulence gene,
ADQ03060


600
small subunit protein


42
VIR14, protein.



[Rhizobium etli CFN 42]


601,
D-amino-acid dehydrogenase;
86361166
0
Rhizobium etli CFN
P. aeruginosa virulence gene,
ADQ03060


602
small subunit protein


42
VIR14, protein.



[Rhizobium etli CFN 42]


603,
D-amino acid dehydrogenase
88712395
2.00E−93
Flavobacteriales
M. catarrhalis protein #1.
ADL05210


604
[Flavobacteriales bacterium


bacterium HTCC2170



HTCC2170]



gi|88708933|gb|EAR01167.1|



D-amino acid dehydrogenase



[Flavobacteriales bacterium



HTCC2170]


605,
D-amino-acid dehydrogenase
113871743
1.00E−170
Sinorhizobium
Glyphosate oxidoreductase gene
AAR22262


606
[Sinorhizobium medicae


medicae WSM419
downstream flanking region.



WSM419]



gi|113726415|gb|EAU07507.1|



D-amino-acid dehydrogenase



[Sinorhizobium medicae



WSM419]


607,
probable D-amino acid
149824671
1.00E−125
Limnobacter sp.
P. aeruginosa virulence gene,
ADQ03060


608
dehydrogenase subunit


MED105
VIR14, protein.



[Limnobacter sp. MED105]


609,
D-amino-acid dehydrogenase
121530396
1.00E−146
Ralstonia pickettii 12J
Glyphosate oxidoreductase gene
AAR22262


610
[Ralstonia pickettii 12J]



downstream flanking region.



gi|121302471|gb|EAX43440.1|



D-amino-acid dehydrogenase



[Ralstonia pickettii 12J]


611,
D-amino-acid dehydrogenase;
86361166
0
Rhizobium etli CFN
P. aeruginosa virulence gene,
ADQ03060


612
small subunit protein


42
VIR14, protein.



[Rhizobium etli CFN 42]


613,
D-amino acid dehydrogenase
149377918
3.00E−98
Marinobacter algicola
N. gonorrhoeae nucleotide sequence
ABP80542


614
small subunit [Marinobacter


DG893
SEQ ID 4691.



algicola DG893]


615,
putative d-amino acid
116250556
0
Rhizobium
Glyphosate oxidoreductase gene
AAR22262


616
dehydrogenase small subunit


leguminosarum bv.
downstream flanking region.



[Rhizobium leguminosarum bv.


viciae 3841



viciae 3841]


617,
D-amino-acid dehydrogenase
86750758
1.00E−113
Rhodopseudomonas
Glyphosate oxidoreductase gene
AAR22262


618
[Rhodopseudomonas palustris


palustris HaA2
downstream flanking region.



HaA2]


619,
aldehyde dehydrogenase
118027543
1.00E−144
Burkholderia
Bacterial polypeptide #10001.
ADN25785


620
[Burkholderia phymatum


phymatum STM815



STM815]



gi|117986837|gb|EAV01212.1|



aldehyde dehydrogenase



[Burkholderia phymatum



STM815]


621,
D-amino acid dehydrogenase
88712395
1.00E−92
Flavobacteriales
Pseudomonas aeruginosa
ABO75104


622
[Flavobacteriales bacterium


bacterium HTCC2170
polypeptide #3.



HTCC2170]



gi|88708933|gb|EAR01167.1|



D-amino acid dehydrogenase



[Flavobacteriales bacterium



HTCC2170]


623,
D-amino acid dehydrogenase
77465126
1.00E−121
Rhodobacter
Photorhabdus luminescens protein
ABM69115


624
small subunit [Rhodobacter


sphaeroides 2.4.1
sequence #59.



sphaeroides 2.4.1]


625,
D-amino-acid dehydrogenase
148553731
0
Sphingomonas
P. aeruginosa virulence gene,
ADQ03060


626
[Sphingomonas wittichii RW1]


wittichii RW1
VIR14, protein.


627,
probable D-amino acid
149824671
1.00E−151
Limnobacter sp.
P. aeruginosa virulence gene,
ADQ03060


628
dehydrogenase subunit


MED105
VIR14, protein.



[Limnobacter sp. MED105]


629,
putative dehydrogenase
39725441
5.00E−63
Streptomyces parvulus
Streptomyces parvulus borrelidin
ADQ74690


630
[Streptomyces parvulus]



polyketide synthase orfB8 protein.


631,
FAD dependent oxidoreductase
118037424
0
Burkholderia
Glyphosate oxidoreductase gene
AAR22262


632
[Burkholderia phytofirmans


phytofirmans PsJN
downstream flanking region.



PsJN]



gi|117992233|gb|EAV06525.1|



FAD dependent oxidoreductase



[Burkholderia phytofirmans



PsJN]


633,
FAD dependent oxidoreductase
118734342
0
Delftia acidovorans
Acinetobacter baumannii protein
ADA33588


634
[Delftia acidovorans SPH-1]


SPH-1
#19.



gi|118665742|gb|EAV72348.1|



FAD dependent oxidoreductase



[Delftia acidovorans SPH-1]


635,
FAD dependent oxidoreductase
118734342
0
Delftia acidovorans
Acinetobacter baumannii protein
ADA33588


636
[Delftia acidovorans SPH-1]


SPH-1
#19.



gi|118665742|gb|EAV72348.1|



FAD dependent oxidoreductase



[Delftia acidovorans SPH-1]


637,
FAD dependent oxidoreductase
77457196
0
Pseudomonas
Pseudomonas aeruginosa
ABO71517


638
[Pseudomonas fluorescens PfO-


fluorescens PfO-1
polypeptide #3.



1]


639,
oxidoreductase-like
118061388
4.00E−72
Roseiflexus
Hyperthermophile Methanopyrus
ADM25642


640
[Roseiflexus castenholzii DSM


castenholzii DSM
kandleri protein #28.



13941]


13941



gi|118014488|gb|EAV28464.1|



oxidoreductase-like



[Roseiflexus castenholzii DSM



13941]


641,
FAD dependent oxidoreductase
77457196
0
Pseudomonas
Pseudomonas aeruginosa
ABO71517


642
[Pseudomonas fluorescens PfO-


fluorescens PfO-1
polypeptide #3.



1]


643,
Glycine/D-amino acid oxidase
83311898
4.00E−86
Magnetospirillum
Pseudomonas aeruginosa
ABO75104


644
[Magnetospirillum magneticum


magneticum AMB-1
polypeptide #3.



AMB-1]


645,
FAD dependent oxidoreductase
92113847
1.00E−151
Chromohalobacter
Glyphosate oxidoreductase gene
AAR22262


646
[Chromohalobacter salexigens


salexigens DSM 3043
downstream flanking region.



DSM 3043]


647,
FAD dependent oxidoreductase
118029195
1.00E−165
Burkholderia
Enterobacter cloacae protein amino
AEH60497


648
[Burkholderia phymatum


phymatum STM815
acid sequence - SEQ ID 5666.



STM815]



gi|117985258|gb|EAU99635.1|



FAD dependent oxidoreductase



[Burkholderia phymatum



STM815]


649,
FAD dependent oxidoreductase
92113847
1.00E−146
Chromohalobacter
Glyphosate oxidoreductase gene
AAR22262


650
[Chromohalobacter salexigens


salexigens DSM 3043
downstream flanking region.



DSM 3043]


651,
putative oxidoreductase protein
27379412
1.00E−122
Bradyrhizobium
Glyphosate oxidoreductase gene
AAR22262


652
[Bradyrhizobium japonicum


japonicum USDA 110
downstream flanking region.



USDA 110]


653,
reductase [Xanthomonas
66767863
1.00E−128
Xanthomonas
Prokaryotic essential gene #34740.
ABU14721


654
campestris pv. campestris str.


campestris pv.



8004]


campestris str. 8004


655,
FAD dependent oxidoreductase
75676467
1.00E−118
Nitrobacter
Glyphosate oxidoreductase gene
AAR22262


656
[Nitrobacter winogradskyi Nb-


winogradskyi Nb-255
downstream flanking region.



255]


657,
D-aspartate oxidase [Stigmatella
115376852
3.00E−85
Stigmatella aurantiaca
Human D-aspartate oxidase active
AED18771


658
aurantiaca DW4/3-1]


DW4/3-1
site.



gi|115366155|gb|EAU65167.1|



D-aspartate oxidase [Stigmatella



aurantiaca DW4/3-1]


659,
FAD dependent oxidoreductase
71909453
1.00E−142
Dechloromonas
P. aeruginosa virulence gene,
ADQ03060


660
[Dechloromonas aromatica


aromatica RCB
VIR14, protein.



RCB]


661,
putative secreted protein
78049397
1.00E−102
Xanthomonas
Human D-aspartate oxidase active
AED18771


662
[Xanthomonas campestris pv.


campestris pv.
site.



vesicatoria str. 85-10]


vesicatoria str. 85-10


663,
FAD dependent oxidoreductase
75676467
1.00E−120
Nitrobacter
Glyphosate oxidoreductase gene
AAR22262


664
[Nitrobacter winogradskyi Nb-


winogradskyi Nb-255
downstream flanking region.



255]


665,
Glycine/D-amino acid oxidase
88810939
5.00E−83
Nitrococcus mobilis
M. catarrhalis protein #1.
ADL05210


666
[Nitrococcus mobilis Nb-231]


Nb-231



gi|88791478|gb|EAR22589.1|



Glycine/D-amino acid oxidase



[Nitrococcus mobilis Nb-231]


667,
FAD dependent oxidoreductase
116624522
2.00E−82
Solibacter usitatus
Human D-aspartate oxidase active
AED18771


668
[Solibacter usitatus Ellin6076]


Ellin6076
site.



gi|116227684|gb|ABJ86393.1|



FAD dependent oxidoreductase



[Solibacter usitatus Ellin6076]


669,
FAD dependent oxidoreductase
75676467
1.00E−122
Nitrobacter
Glyphosate oxidoreductase gene
AAR22262


670
[Nitrobacter winogradskyi Nb-


winogradskyi Nb-255
downstream flanking region.



255]


671,
FAD dependent oxidoreductase
118038076
0
Burkholderia
Glyphosate oxidoreductase gene
AAR22262


672
[Burkholderia phytofirmans


phytofirmans PsJN
downstream flanking region.



PsJN]



gi|117991720|gb|EAV06013.1|



FAD dependent oxidoreductase



[Burkholderia phytofirmans



PsJN]


673,
FAD dependent oxidoreductase
118038076
0
Burkholderia
Glyphosate oxidoreductase gene
AAR22262


674
[Burkholderia phytofirmans


phytofirmans PsJN
downstream flanking region.



PsJN]



gi|117991720|gb|EAV06013.1|



FAD dependent oxidoreductase



[Burkholderia phytofirmans



PsJN]


675,
FAD dependent oxidoreductase
118038076
0
Burkholderia
Glyphosate oxidoreductase gene
AAR22262


676
[Burkholderia phytofirmans


phytofirmans PsJN
downstream flanking region.



PsJN]



gi|117991720|gb|EAV06013.1|



FAD dependent oxidoreductase



[Burkholderia phytofirmans



PsJN]


677,
D-amino-acid oxidase
119716015
2.00E−51
Nocardioides sp.
Human D-aspartate oxidase active
AED18771


678
[Nocardioides sp. JS614]


JS614
site.



gi|119536676|gb|ABL81293.1|



D-amino-acid oxidase



[Nocardioides sp. JS614]


679,
FAD dependent oxidoreductase
118731339
0
Delftia acidovorans
Pseudomonas aeruginosa
ABO71517


680
[Delftia acidovorans SPH-1]


SPH-1
polypeptide #3.



gi|118668198|gb|EAV74793.1|



FAD dependent oxidoreductase



[Delftia acidovorans SPH-1]


681,
Glycine/D-amino acid oxidase
88810939
5.00E−94
Nitrococcus mobilis
P. aeruginosa virulence gene,
ADQ03060


682
[Nitrococcus mobilis Nb-231]


Nb-231
VIR14, protein.



gi|88791478|gb|EAR22589.1|



Glycine/D-amino acid oxidase



[Nitrococcus mobilis Nb-231]


683,
FAD dependent oxidoreductase
114319576
2.00E−86
Alkalilimnicola
Pseudomonas aeruginosa
ABO75104


684
[Alkalilimnicola ehrlichei


ehrlichei MLHE-1
polypeptide #3.



MLHE-1]


685,
FAD dependent oxidoreductase
114319576
5.00E−86
Alkalilimnicola
M. catarrhalis protein #1.
ADL05210


686
[Alkalilimnicola ehrlichei


ehrlichei MLHE-1



MLHE-1]


687,
D-aspartate oxidase [Stigmatella
115376852
2.00E−71
Stigmatella aurantiaca
Human D-aspartate oxidase active
AED18771


688
aurantiaca DW4/3-1]


DW4/3-1
site.



gi|115366155|gb|EAU65167.1|



D-aspartate oxidase [Stigmatella



aurantiaca DW4/3-1]


689,
FAD dependent oxidoreductase
118716641
1.00E−154
Burkholderia
Glyphosate oxidoreductase gene
AAR22262


690
[Burkholderia multivorans


multivorans ATCC
downstream flanking region.



ATCC 17616]


17616



gi|118660081|gb|EAV66824.1|



FAD dependent oxidoreductase



[Burkholderia multivorans



ATCC 17616]


691,
FAD dependent oxidoreductase
94314499
1.00E−159
Ralstonia
Acinetobacter baumannii protein
ADA36279


692
[Ralstonia metallidurans CH34]


metallidurans CH34
#19.


693,
NADH:ubiquinone
110634071
9.00E−58
Mesorhizobium sp.
Drosophila melanogaster
ABB59730


694
oxidoreductase 17.2 kD subunit


BNC1
polypeptide SEQ ID NO 24465.



[Mesorhizobium sp. BNC1]


695,
FAD dependent oxidoreductase
116695075
1.00E−141
Ralstonia eutropha
Pseudomonas aeruginosa
ABO71517


696
[Ralstonia eutropha H16]


H16
polypeptide #3.


697,
Glycine/D-amino acid oxidase
83311898
1.00E−103
Magnetospirillum
P. aeruginosa virulence gene,
ADQ03060


698
[Magnetospirillum magneticum


magneticum AMB-1
VIR14, protein.



AMB-1]


699,
FAD dependent oxidoreductase
75676467
1.00E−119
Nitrobacter
Glyphosate oxidoreductase gene
AAR22262


700
[Nitrobacter winogradskyi Nb-


winogradskyi Nb-255
downstream flanking region.



255]


701,
D-aspartate oxidase [Stigmatella
115376852
8.00E−51
Stigmatella aurantiaca
Human D-aspartate oxidase active
AED18771


702
aurantiaca DW4/3-1]


DW4/3-1
site.



gi|115366155|gb|EAU65167.1|



D-aspartate oxidase [Stigmatella



aurantiaca DW4/3-1]


703,
FAD dependent oxidoreductase
91976294
1.00E−118
Rhodopseudomonas
Glyphosate oxidoreductase gene
AAR22262


704
[Rhodopseudomonas palustris


palustris BisB5
downstream flanking region.



BisB5]


705,
putative oxidoreductase protein
27379412
1.00E−133
Bradyrhizobium
Glyphosate oxidoreductase gene
AAR22262


706
[Bradyrhizobium japonicum


japonicum USDA 110
downstream flanking region.



USDA 110]


707,
FAD dependent oxidoreductase
75676467
1.00E−121
Nitrobacter
Glyphosate oxidoreductase gene
AAR22262


708
[Nitrobacter winogradskyi Nb-


winogradskyi Nb-255
downstream flanking region.



255]


709,
FAD dependent oxidoreductase
118034565
0
Burkholderia
Glyphosate oxidoreductase gene
AAR22262


710
[Burkholderia phymatum


phymatum STM815
downstream flanking region.



STM815]



gi|117979745|gb|EAU94152.1|



FAD dependent oxidoreductase



[Burkholderia phymatum



STM815]


711,
FAD dependent oxidoreductase
114319576
1.00E−88
Alkalilimnicola
P. aeruginosa virulence gene,
ADQ03060


712
[Alkalilimnicola ehrlichei


ehrlichei MLHE-1
VIR14, protein.



MLHE-1]


713,
FAD dependent oxidoreductase
118034565
0
Burkholderia
Glyphosate oxidoreductase gene
AAR22262


714
[Burkholderia phymatum


phymatum STM815
downstream flanking region.



STM815]



gi|117979745|gb|EAU94152.1|



FAD dependent oxidoreductase



[Burkholderia phymatum



STM815]


715,
FAD dependent oxidoreductase
144897812
4.00E−87
Magnetospirillum
Pseudomonas aeruginosa
ABO75104


716
[Magnetospirillum


gryphiswaldense
polypeptide #3.



gryphiswaldense MSR-1]


MSR-1


717,
FAD dependent oxidoreductase,
124006998
4.00E−29
Microscilla marina
H. pylori GHPO 1099 gene.
AAW98270


718
putative [Microscilla marina


ATCC 23134



ATCC 23134]



gi|123987451|gb|EAY27171.1|



FAD dependent oxidoreductase,



putative [Microscilla marina



ATCC 23134]


719,
FAD dependent oxidoreductase
75676467
1.00E−137
Nitrobacter
Glyphosate oxidoreductase gene
AAR22262


720
[Nitrobacter winogradskyi Nb-


winogradskyi Nb-255
downstream flanking region.



255]


721,
D-amino-acid oxidase
119716015
7.00E−53
Nocardioides sp.
Human D-aspartate oxidase active
AED18771


722
[Nocardioides sp. JS614]


JS614
site.



gi|119536676|gb|ABL81293.1|



D-amino-acid oxidase



[Nocardioides sp. JS614]


723,
Glycine/D-amino acid oxidase
88810939
2.00E−84
Nitrococcus mobilis
Pseudomonas aeruginosa
ABO75104


724
[Nitrococcus mobilis Nb-231]


Nb-231
polypeptide #3.



gi|88791478|gb|EAR22589.1|



Glycine/D-amino acid oxidase



[Nitrococcus mobilis Nb-231]


725,
FAD dependent oxidoreductase
71909453
1.00E−133
Dechloromonas
Enterobacter cloacae protein amino
AEH60497


726
[Dechloromonas aromatica


aromatica RCB
acid sequence - SEQ ID 5666.



RCB]


727,
D-amino acid dehydrogenase
149377918
1.00E−136
Marinobacter algicola
Photorhabdus luminescens protein
ABM69115


728
small subunit [Marinobacter


DG893
sequence #59.



algicola DG893]


729,
pyruvate flavodoxin/ferredoxin
114319858
1.00E−135
Alkalilimnicola
Staphylococcus aureus protein #10.
ABM73103


730
oxidoreductase domain protein


ehrlichei MLHE-1



[Alkalilimnicola ehrlichei



MLHE-1]


731,
FAD dependent oxidoreductase
144897812
4.00E−80
Magnetospirillum
Klebsiella pneumoniae polypeptide
ABO67618


732
[Magnetospirillum


gryphiswaldense
seqid 7178.



gryphiswaldense MSR-1]


MSR-1


733,
FAD dependent oxidoreductase
144897812
1.00E−89
Magnetospirillum
Pseudomonas aeruginosa
ABO75104


734
[Magnetospirillum


gryphiswaldense
polypeptide #3.



gryphiswaldense MSR-1]


MSR-1


735,
FAD linked oxidase domain
149124512
3.00E−61
Methylobacterium sp.
FAD-dependent-D-erythronate 4-
ADM97925


736
protein [Methylobacterium sp.


4-46
phosphate dehydrogenase.



4-46]


737,
FAD dependent oxidoreductase
92113847
1.00E−150
Chromohalobacter
Glyphosate oxidoreductase gene
AAR20642


738
[Chromohalobacter salexigens


salexigens DSM 3043
downstream flanking region.



DSM 3043]


739,
FAD dependent oxidoreductase
92113847
1.00E−153
Chromohalobacter
Glyphosate oxidoreductase gene
AAR22262


740
[Chromohalobacter salexigens


salexigens DSM 3043
downstream flanking region.



DSM 3043]


741,
FAD dependent oxidoreductase
92113847
1.00E−153
Chromohalobacter
Glyphosate oxidoreductase gene
AAR22262


742
[Chromohalobacter salexigens


salexigens DSM 3043
downstream flanking region.



DSM 3043]


743,
FAD dependent oxidoreductase
92113847
1.00E−150
Chromohalobacter
Glyphosate oxidoreductase gene
AAR20642


744
[Chromohalobacter salexigens


salexigens DSM 3043
downstream flanking region.



DSM 3043]


745,
FAD dependent oxidoreductase
94314005
1.00E−101
Ralstonia
Pseudomonas aeruginosa
ABO71517


746
[Ralstonia metallidurans CH34]


metallidurans CH34
polypeptide #3.


747,
glycine/D-amino acid oxidase
121525574
1.00E−125
Parvibaculum
P. aeruginosa virulence gene,
ADQ03060


748
[Parvibaculum lavamentivorans


lavamentivorans DS-1
VIR14, protein.



DS-1]



gi|121298521|gb|EAX39710.1|



glycine/D-amino acid oxidase



[Parvibaculum lavamentivorans



DS-1]


749,
FAD dependent oxidoreductase
71909453
1.00E−139
Dechloromonas
P. aeruginosa virulence gene,
ADQ03060


750
[Dechloromonas aromatica


aromatica RCB
VIR14, protein.



RCB]


751,
monooxygenase, FAD-binding
118050299
8.00E−81
Comamonas
Farnesyl dibenzodiazepinone
ADR01274


752
[Comamonas testosteroni KF-1]


testosteroni KF-1
biosynthetic ORF9 protein HMGA,



gi|118002385|gb|EAV16539.1|



SEQ ID 18.



monooxygenase, FAD-binding



[Comamonas testosteroni KF-1]


753,
FAD dependent oxidoreductase
75676467
1.00E−120
Nitrobacter
Glyphosate oxidoreductase gene
AAR22262


754
[Nitrobacter winogradskyi Nb-


winogradskyi Nb-255
downstream flanking region.



255]


755,
FAD dependent oxidoreductase
91976294
1.00E−121
Rhodopseudomonas
Glyphosate oxidoreductase gene
AAR22262


756
[Rhodopseudomonas palustris


palustris BisB5
downstream flanking region.



BisB5]


757,
putative oxidoreductase protein
126732124
1.00E−131
Sagittula stellata E-37
Glyphosate oxidoreductase gene
AAR22262


758
[Sagittula stellata E-37]



downstream flanking region.



gi|126707413|gb|EBA06477.1|



putative oxidoreductase protein



[Sagittula stellata E-37]


759,
FAD dependent oxidoreductase
75676467
1.00E−113
Nitrobacter
Glyphosate oxidoreductase gene
AAR22262


760
[Nitrobacter winogradskyi Nb-


winogradskyi Nb-255
downstream flanking region.



255]


761,
FAD dependent oxidoreductase
92113847
1.00E−149
Chromohalobacter
Glyphosate oxidoreductase gene
AAR20642


762
[Chromohalobacter salexigens


salexigens DSM 3043
downstream flanking region.



DSM 3043]


763,
FAD dependent oxidoreductase
114319576
4.00E−84
Alkalilimnicola
Pseudomonas aeruginosa
ABO75104


764
[Alkalilimnicola ehrlichei


ehrlichei MLHE-1
polypeptide #3.



MLHE-1]


765,
FAD linked oxidase domain
149124512
1.00E−106
Methylobacterium sp.
FAD-dependent-D-erythronate 4-
ADM97925


766
protein [Methylobacterium sp.


4-46
phosphate dehydrogenase.



4-46]


767,
FAD dependent oxidoreductase
114319576
3.00E−84
Alkalilimnicola
Pseudomonas aeruginosa
ABO75104


768
[Alkalilimnicola ehrlichei


ehrlichei MLHE-1
polypeptide #3.



MLHE-1]


769,
FAD dependent oxidoreductase
92113847
1.00E−149
Chromohalobacter
Glyphosate oxidoreductase gene
AAR20642


770
[Chromohalobacter salexigens


salexigens DSM 3043
downstream flanking region.



DSM 3043]


771,
FAD dependent oxidoreductase
75676467
1.00E−121
Nitrobacter
Glyphosate oxidoreductase gene
AAR22262


772
[Nitrobacter winogradskyi Nb-


winogradskyi Nb-255
downstream flanking region.



255]


773,
FAD dependent oxidoreductase
92113847
1.00E−149
Chromohalobacter
Glyphosate oxidoreductase gene
AAR22262


774
[Chromohalobacter salexigens


salexigens DSM 3043
downstream flanking region.



DSM 3043]


775,
Glycine/D-amino acid oxidase
88810939
5.00E−77
Nitrococcus mobilis
N. gonorrhoeae nucleotide sequence
ABP80542


776
[Nitrococcus mobilis Nb-231]


Nb-231
SEQ ID 4691.



gi|88791478|gb|EAR22589.1|



Glycine/D-amino acid oxidase



[Nitrococcus mobilis Nb-231]


777,
putative oxidoreductase protein
27379412
0
Bradyrhizobium
Glyphosate oxidoreductase gene
AAR22262


778
[Bradyrhizobium japonicum


japonicum USDA 110
downstream flanking region.



USDA 110]


779,
FAD dependent oxidoreductase
118037424
0
Burkholderia
Glyphosate oxidoreductase gene
AAR22262


780
[Burkholderia phytofirmans


phytofirmans PsJN
downstream flanking region.



PsJN]



gi|117992233|gb|EAV06525.1|



FAD dependent oxidoreductase



[Burkholderia phytofirmans



PsJN]


781,
FAD dependent oxidoreductase
118593299
1.00E−122
Stappia aggregata
Glyphosate oxidoreductase gene
AAR22262


782
[Stappia aggregata IAM 12614]


IAM 12614
downstream flanking region.



gi|118434190|gb|EAV40846.1|



FAD dependent oxidoreductase



[Stappia aggregata IAM 12614]


783,
FAD linked oxidase domain
149124512
7.00E−99
Methylobacterium sp.
FAD-dependent-D-erythronate 4-
ADM97925


784
protein [Methylobacterium sp.


4-46
phosphate dehydrogenase.



4-46]


785,
FAD dependent oxidoreductase
114319576
1.00E−84
Alkalilimnicola
Pseudomonas aeruginosa
ABO75104


786
[Alkalilimnicola ehrlichei


ehrlichei MLHE-1
polypeptide #3.



MLHE-1]


787,
FAD dependent oxidoreductase
144897812
9.00E−85
Magnetospirillum
Pseudomonas aeruginosa
ABO75104


788
[Magnetospirillum


gryphiswaldense
polypeptide #3.



gryphiswaldense MSR-1]


MSR-1


789,
putative oxidoreductase protein
126732124
1.00E−107
Sagittula stellata E-37
Glyphosate oxidoreductase gene
AAR22262


790
[Sagittula stellata E-37]



downstream flanking region.



gi|126707413|gb|EBA06477.1|



putative oxidoreductase protein



[Sagittula stellata E-37]


791,
Oxidoreductase, N-
89211549
2.00E−98
Halothermothrix
Propionibacterium acnes predicted
ABM37055


792
terminal:Dihydrodipicolinate


orenii H 168
ORF-encoded polypeptide #300.



reductase [Halothermothrix



orenii H 168]



gi|89158855|gb|EAR78543.1|



Oxidoreductase, N-



terminal:Dihydrodipicolinate



reductase [Halothermothrix



orenii H 168]


793,
PUTATIVE
15964495
1.00E−149
Sinorhizobium
Glyphosate oxidoreductase gene
AAR22262


794
OXIDOREDUCTASE


meliloti
downstream flanking region.



PROTEIN [Sinorhizobium



meliloti].


795,
indolepyruvate ferredoxin
118593297
0
Stappia aggregata
Acinetobacter baumannii protein
ADA35170


796
oxidoreductase [Stappia


IAM 12614
#19.



aggregata IAM 12614]



gi|118434188|gb|EAV40844.1|



indolepyruvate ferredoxin



oxidoreductase [Stappia



aggregata IAM 12614]


797,
FAD linked oxidase domain
149124512
1.00E−128
Methylobacterium sp.
FAD-dependent-D-erythronate 4-
ADM97925


798
protein [Methylobacterium sp.


4-46
phosphate dehydrogenase.



4-46]


799,
FAD dependent oxidoreductase
114319576
9.00E−90
Alkalilimnicola
M. catarrhalis protein #1.
ADL05210


800
[Alkalilimnicola ehrlichei


ehrlichei MLHE-1



MLHE-1]


801,
FAD dependent oxidoreductase
144897812
1.00E−89
Magnetospirillum
Pseudomonas aeruginosa
ABO75104


802
[Magnetospirillum


gryphiswaldense
polypeptide #3.



gryphiswaldense MSR-1]


MSR-1


803,
FAD dependent oxidoreductase
114319576
1.00E−86
Alkalilimnicola
P. aeruginosa virulence gene,
ADQ03060


804
[Alkalilimnicola ehrlichei


ehrlichei MLHE-1
VIR14, protein.



MLHE-1]


805,
FAD linked oxidase domain
149124512
1.00E−121
Methylobacterium sp.
FAD-dependent-D-erythronate 4-
ADM97925


806
protein [Methylobacterium sp.


4-46
phosphate dehydrogenase.



4-46]


807,
D-amino acid dehydrogenase
149377918
1.00E−135
Marinobacter algicola
Photorhabdus luminescens protein
ABM69115


808
small subunit [Marinobacter


DG893
sequence #59.



algicola DG893]


809,
FAD dependent oxidoreductase
118038076
0
Burkholderia
Glyphosate oxidoreductase gene
AAR22262


810
[Burkholderia phytofirmans


phytofirmans PsJN
downstream flanking region.



PsJN]



gi|117991720|gb|EAV06013.1|



FAD dependent oxidoreductase



[Burkholderia phytofirmans



PsJN]


811,
FAD dependent oxidoreductase
118038076
0
Burkholderia
Glyphosate oxidoreductase gene
AAR22262


812
[Burkholderia phytofirmans


phytofirmans PsJN
downstream flanking region.



PsJN]



gi|117991720|gb|EAV06013.1|



FAD dependent oxidoreductase



[Burkholderia phytofirmans



PsJN]


813,
FAD dependent oxidoreductase
118038076
0
Burkholderia
Glyphosate oxidoreductase gene
AAR22262


814
[Burkholderia phytofirmans


phytofirmans PsJN
downstream flanking region.



PsJN]



gi|117991720|gb|EAV06013.1|



FAD dependent oxidoreductase



[Burkholderia phytofirmans



PsJN]


815,
FAD dependent oxidoreductase
118038076
0
Burkholderia
Glyphosate oxidoreductase gene
AAR22262


816
[Burkholderia phytofirmans


phytofirmans PsJN
downstream flanking region.



PsJN]



gi|117991720|gb|EAV06013.1|



FAD dependent oxidoreductase



[Burkholderia phytofirmans



PsJN]


817,
FAD dependent oxidoreductase
114319576
5.00E−93
Alkalilimnicola
P. aeruginosa virulence gene,
ADQ03060


818
[Alkalilimnicola ehrlichei


ehrlichei MLHE-1
VIR14, protein.



MLHE-1]


819,
FAD dependent oxidoreductase
144897812
1.00E−124
Magnetospirillum
P. aeruginosa virulence gene,
ADQ03060


820
[Magnetospirillum


gryphiswaldense
VIR14, protein.



gryphiswaldense MSR-1]


MSR-1


821,
FAD dependent oxidoreductase
92113847
1.00E−150
Chromohalobacter
Glyphosate oxidoreductase gene
AAR20642


822
[Chromohalobacter salexigens


salexigens DSM 3043
downstream flanking region.



DSM 3043]


823,
hypothetical protein, contains
13473721
1.00E−176
Mesorhizobium loti
Human Her-2/neu over expression
AAE00797


824
weak similarity to sarcosine



modulated protein (HOMPS) H14



oxidase [Mesorhizobium loti].



cDNA.


825,
FAD dependent oxidoreductase
118731339
0
Delftia acidovorans
Pseudomonas aeruginosa
ABO71517


826
[Delftia acidovorans SPH-1]


SPH-1
polypeptide #3.



gi|118668198|gb|EAV74793.1|



FAD dependent oxidoreductase



[Delftia acidovorans SPH-1]


827,
FAD dependent oxidoreductase
118593299
1.00E−122
Stappia aggregata
Glyphosate oxidoreductase gene
AAR22262


828
[Stappia aggregata IAM 12614]


IAM 12614
downstream flanking region.



gi|118434190|gb|EAV40846.1|



FAD dependent oxidoreductase



[Stappia aggregata IAM 12614]


829,
FAD dependent oxidoreductase
114319576
2.00E−87
Alkalilimnicola
Pseudomonas aeruginosa
ABO75104


830
[Alkalilimnicola ehrlichei


ehrlichei MLHE-1
polypeptide #3.



MLHE-1]


831,
hypothetical protein
13475565
7.00E−99
Mesorhizobium loti
Pseudomonas aeruginosa
ABO71517


832
[Mesorhizobium loti].



polypeptide #3.


833,
FAD dependent oxidoreductase
144897812
2.00E−89
Magnetospirillum
Pseudomonas aeruginosa
ABO75104


834
[Magnetospirillum


gryphiswaldense
polypeptide #3.



gryphiswaldense MSR-1]


MSR-1


835,
FAD linked oxidase domain
149124512
1.00E−123
Methylobacterium sp.
FAD-dependent-D-erythronate 4-
ADM97925


836
protein [Methylobacterium sp.


4-46
phosphate dehydrogenase.



4-46]


837,
D-aspartate oxidase [Stigmatella
115376852
1.00E−56
Stigmatella aurantiaca
Human D-aspartate oxidase active
AED18771


838
aurantiaca DW4/3-1]


DW4/3-1
site.



gi|115366155|gb|EAU65167.1|



D-aspartate oxidase [Stigmatella



aurantiaca DW4/3-1]


839,
FAD dependent oxidoreductase
118038076
0
Burkholderia
Glyphosate oxidoreductase gene
AAR22262


840
[Burkholderia phytofirmans


phytofirmans PsJN
downstream flanking region.



PsJN]



gi|117991720|gb|EAV06013.1|



FAD dependent oxidoreductase



[Burkholderia phytofirmans



PsJN]


841,
FAD dependent oxidoreductase
71909453
1.00E−126
Dechloromonas
P. aeruginosa virulence gene,
ADQ03060


842
[Dechloromonas aromatica


aromatica RCB
VIR14, protein.



RCB]


843,
FAD dependent oxidoreductase
118029195
1.00E−180
Burkholderia
Enterobacter cloacae protein amino
AEH60497


844
[Burkholderia phymatum


phymatum STM815
acid sequence - SEQ ID 5666.



STM815]



gi|117985258|gb|EAU99635.1|



FAD dependent oxidoreductase



[Burkholderia phymatum



STM815]


845,
putative oxidoreductase protein
27379412
0
Bradyrhizobium
Glyphosate oxidoreductase gene
AAR22262


846
[Bradyrhizobium japonicum


japonicum USDA 110
downstream flanking region.



USDA 110]


847,
FAD dependent oxidoreductase
77457196
1.00E−171
Pseudomonas
Pseudomonas aeruginosa
ABO71517


848
[Pseudomonas fluorescens PfO-


fluorescens PfO-1
polypeptide #3.



1]


849,
FAD dependent oxidoreductase
114319576
7.00E−93
Alkalilimnicola
P. aeruginosa virulence gene,
ADQ03060


850
[Alkalilimnicola ehrlichei


ehrlichei MLHE-1
VIR14, protein.



MLHE-1]


851,
D-amino acid oxidase
32140775
1.00E−62
Arthrobacter
Primer Aprev4 #SEQ ID 8.
ADF68144


852
[Arthrobacter protophormiae].


protophormiae


853,
FAD dependent oxidoreductase
77457196
1.00E−171
Pseudomonas
Pseudomonas aeruginosa
ABO71517


854
[Pseudomonas fluorescens PfO-


fluorescens PfO-1
polypeptide #3.



1]


855,
FAD dependent oxidoreductase
118051673
0
Comamonas
Pseudomonas aeruginosa
ABO71517


856
[Comamonas testosteroni KF-1]


testosteroni KF-1
polypeptide #3.



gi|118001016|gb|EAV15172.1|



FAD dependent oxidoreductase



[Comamonas testosteroni KF-1]


857,
FAD dependent oxidoreductase
118051673
0
Comamonas
Pseudomonas aeruginosa
ABO71517


858
[Comamonas testosteroni KF-1]


testosteroni KF-1
polypeptide #3.



gi|118001016|gb|EAV15172.1|



FAD dependent oxidoreductase



[Comamonas testosteroni KF-1]


859,
FAD dependent oxidoreductase
118051673
0
Comamonas
Pseudomonas aeruginosa
ABO71517


860
[Comamonas testosteroni KF-1]


testosteroni KF-1
polypeptide #3.



gi|118001016|gb|EAV15172.1|



FAD dependent oxidoreductase



[Comamonas testosteroni KF-1]


861,
D-amino acid oxidase
108803375
3.00E−70
Rubrobacter
Human D-aspartate oxidase active
AED18771


862
[Rubrobacter xylanophilus


xylanophilus DSM
site.



DSM 9941]


9941


863,
D-amino acid dehydrogenase
66043505
0
Pseudomonas syringae
P. aeruginosa virulence gene,
ADQ03060


864
small subunit [Pseudomonas


pv. syringae B728a
VIR14, protein.



syringae pv. syringae B728a]


865,



Lactobacillus

ABM71198


866



salivarius subsp.






salivarius UCC118


867,



Methanococcus

ADS43070


868



maripaludis C7


869,





AEM18037


870


871,



Planctomyces maris

ADN26446


872



DSM 8797


873,



Planctomyces maris

ADN26446


874



DSM 8797


875,



Roseiflexus

ADN26446


876



castenholzii DSM






13941


877,



Planctomyces maris

ADN26446


878



DSM 8797


879,



Planctomyces maris

ADN26446


880



DSM 8797


881,



Oceanobacter sp.

AEB37927


882



RED65


883,



Thiobacillus

AEM18040


884



denitrificans ATCC






25259


885,



Clostridium

AEM18031


886



beijerinckii NCIMB






8052


887,



Nocardioides sp.

AEK20408


888



JS614


889,



Methylococcus

ABM71198


890



capsulatus str. Bath


891,



Clostridium

ABB08244


892



beijerinckii NCIMB






8052


893,



Clostridium

ABB08244


894



beijerinckii NCIMB






8052


895,



Clostridium

ABU32980


896



acetobutylicum ATCC






824


897,



Roseiflexus

ADN26446


898



castenholzii DSM






13941


899,



Planctomyces maris

ADN26446


900



DSM 8797


901,



Planctomyces maris

ADN26446


902



DSM 8797


903,



Planctomyces maris

ADN26446


904



DSM 8797


905,



Rhodobacter

ADF03944


906



sphaeroides 2.4.1


907,



Streptomyces

AEK20408


908



avermitilis MA-4680


909,



Bacillus sp. B14905

ADW43694


910


911,



Azoarcus sp. EbN1

ABU33175


912


913,



Bacillus licheniformis

AEM18039


914



ATCC 14580


915,



Roseiflexus

ADN26446


916



castenholzii DSM






13941


917,



Robiginitalea

AAY13560


918



biformata HTCC2501


919,



Planctomyces maris

ADN26446


920



DSM 8797


921,



Planctomyces maris

ADN26446


922



DSM 8797


923,



Roseobacter sp.

ADF03944


924



MED193


925,



Planctomyces maris

ADN26446


926



DSM 8797


927,



Aquifex aeolicus VF5

ADN17496


928


929,



Aspergillus terreus

ADS78245


930



NIH2624


931,



Oceanicola granulosus

ADS78325


932



HTCC2516


933,



Pyrococcus horikoshii

ADS41897


934



OT3


935,



Aeromonas

ADS78291


936



hydrophila subsp.






hydrophila ATCC






7966


937,



Silicibacter sp.

ADF03944


938



TM1040


939,



Rhodopseudomonas

ADF03944


940



palustris CGA009


941,



Xanthobacter

ADF03944


942



autotrophicus Py2


943,



Azoarcus sp. BH72

AEM18040


944


945,



Clostridium

AEM18031


946



beijerinckii NCIMB






8052


947,



Alcanivorax

AAY13560


948



borkumensis SK2


949,





ABU21638


950


951,
aspartate aminotransferase
14590640
2.00E−52
Pyrococcus horikoshii
Bacterial polypeptide #23667.
ADS41897


952
[Pyrococcus horikoshii].


953,
aspartate aminotransferase
15606968
0
Aquifex aeolicus
Bacterial polypeptide #23667.
ADN17496


954
[Aquifex aeolicus].


955,
conserved hypothetical protein
115385557
1.00E−126
Aspergillus terreus
Aminotransferase/mutase/deaminase
ADS78245


956
[Aspergillus terreus NIH2624]


NIH2624
enzyme #14.


957,
hypothetical protein
89070918
0
Oceanicola granulosus
Aminotransferase/mutase/deaminase
ADS78325


958
OG2516_15919 [Oceanicola


HTCC2516
enzyme #14.



granulosus HTCC2516]



gi|89043511|gb|EAR49723.1|



hypothetical protein



OG2516_15919 [Oceanicola



granulosus HTCC2516]


959,
aminotransferase; class III
117619456
1.00E−158
Aeromonas
Aminotransferase/mutase/deaminase
ADS78291


960
[Aeromonas hydrophila subsp.


hydrophila subsp.
enzyme #14.



hydrophila ATCC 7966]


hydrophila ATCC






7966




















Geneseq











DNA

Predicted
Query
Query
Subject
Subject



Accession

EC
DNA
Protein
DNA
Protein
% ID
SEQ ID



Code
Evalue
Number
Length
Length
Length
Length
Protein
NO:







ADS78244
0
2.6.1.42
879
292
954
317

1, 2



ADJ41018
2.4
2.6.1.21
855
284
0
286
66
3, 4



ADI39160
0.61
2.6.1.21
855
284
0
285
51
5, 6



ABZ69309
0.16
2.6.1.21
870
289
0
285
58
7, 8



ACA26397
0.28
2.6.1.21
435
144
0
286
60
 9, 10



ABL17260
2.5
2.6.1.21
879
292
0
285
56
11, 12



AAH32576
0.039
2.6.1.21
855
284
0
282
63
13, 14



ADE99771
0.038
2.6.1.21
837
278
0
294
45
15, 16




0
2.6.1.42
918
305
0
306
34
17, 18



ABL03988
2.4
2.6.1.21
861
286
0
282
61
19, 20



ACF71263
2.4
2.6.1.21
861
286
0
282
63
21, 22



ADA66322
0.16
2.6.1.21
861
286
0
282
61
23, 24



ABN23130
0.6
2.6.1.21
840
279
0
283
55
25, 26



ADL15020
0.57
2.6.1.42
801
266
0
274
37
27, 28



AAK71577
0.6
2.6.1.21
849
282
843
280
51
29, 30



ABA15896
0.003
2.6.1.9
1062
353
0
371
32
31, 32



ABQ69245
4.00E−08
2.6.1.21
852
283
0
283
66
33, 34



ABD13518
0.21
2.9.1.1
1143
380
0
388
35
35, 36



ABN18447
0.017
5.4.3.8
1389
462
0
455
43
37, 38



ADO84697
0.05
2.6.1.45
1080
359
0
397
48
39, 40



AAN81507
1.00E−20
2.6.1.21
852
283
0
282
76
41, 42



ABL08182
0.99
5.4.3.8
1350
449
0
455
48
43, 44



ACA25362
6.00E−08
2.6.1.45
1170
389
0
397
51
45, 46



ACA62990
0.066
5.4.3.8
1401
466
0
455
42
47, 48



ADS63519
7.00E−08
5.4.3.8
1353
450
0
454
49
49, 50



ADH48029
1.00E−09
5.4.3.8
1344
447
0
454
47
51, 52



ACA53304
2.4
2.6.1.21
861
286
0
281
49
53, 54



ABD17818
4.00E−34
2.6.1.1
399
132
0
396
94
55, 56



ABD17818
6.00E−36
2.6.1.1
399
132
0
396
93
57, 58



ABD17818
9.00E−29
2.6.1.1
399
132
0
396
93
59, 60



ABD17818
1.00E−34
2.6.1.1
399
132
0
396
94
61, 62



ABD17818
7.00E−48
2.6.1.1
399
132
0
396
93
63, 64



ABD17818
5.00E−52
2.6.1.1
399
132
615
410

65, 66



ABD17818
4.00E−46
2.6.1.1
399
132
615
410

67, 68



ABD17818
1.00E−43
2.6.1.1
399
132
615
410

69, 70



ABD17818
5.00E−52
2.6.1.1
399
132
0
396
96
71, 72



ABD17818
5.00E−52
2.6.1.1
399
132
0
396
96
73, 74



ABD03911
2.5
2.6.1.21
873
290
0
285
57
75, 76



ABD03911
2.5
2.6.1.21
873
290
0
285
57
77, 78



ABD17818
7.00E−42
2.6.1.1
396
131
0
396
93
79, 80



ABD17818
1.00E−40
2.6.1.1
396
131
0
396
94
81, 82



ADS58845
0.017
5.4.3.8
1398
465
0
455
41
83, 84



AAI99682
0.62
2.6.1.21
873
290
0
286
46
85, 86



ACL13803
9.8
2.6.1.21
879
292
0
282
40
87, 88



ABD17818
4.00E−34
2.6.1.1
399
132
0
396
93
89, 90



ABD17818
3.00E−53
2.6.1.1
399
132
0
396
93
91, 92



ABD17818
8.00E−54
2.6.1.1
399
132
0
396
93
93, 94



ABD17818
8.00E−54
2.6.1.1
399
132
0
396
93
95, 96



ABD17818
5.00E−55
2.6.1.1
399
132
0
396
93
97, 98



ABD17818
3.00E−44
2.6.1.1
393
130
0
396
96
 99, 100



ABD17818
8.00E−54
2.6.1.1
396
131
0
396
97
101, 102



ABD17818
8.00E−60
2.6.1.1
399
132
0
396
95
103, 104



ABD17818
5.00E−55
2.6.1.1
399
132
0
396
94
105, 106



ABD17818
8.00E−54
2.6.1.1
399
132
0
396
93
107, 108



ABD17818
5.00E−49
2.6.1.1
399
132
0
396
93
109, 110



ABD17818
5.00E−52
2.6.1.1
399
132
0
396
94
111, 112



ABD17818
3.00E−50
2.6.1.1
399
132
0
396
93
113, 114



ABD17818
5.00E−52
2.6.1.1
393
130
0
396
96
115, 116



ABD17818
5.00E−55
2.6.1.1
399
132
0
396
93
117, 118



ABD17818
5.00E−55
2.6.1.1
399
132
0
396
93
119, 120



ABD17818
3.00E−56
2.6.1.1
399
132
0
396
93
121, 122



ABD17818
3.00E−38
2.6.1.1
399
132
0
396
93
123, 124



ADS45796
0.038
2.6.1.42
831
276
0
273
57
125, 126



ADH48029
1.00E−09
5.4.3.8
1362
453
0
455
55
127, 128



ABL03211
2.4
2.6.1.21
864
287
0
285
57
129, 130



ADP27941
0
2.6.1.21
855
284
1709
284

131, 132



ACL64145
0.16
2.6.1.21
876
291
0
285
45
133, 134



ABL03211
2.4
2.6.1.21
864
287
0
285
57
135, 136



AEC75821
0.001
5.4.3.8
1386
461
0
455
46
137, 138



ADS57580
0.065
5.4.3.8
1383
460
0
455
43
139, 140



ABZ41029
0.15
2.6.1.21
855
284
0
286
51
141, 142



AAS82939
0.66
2.6.1.21
915
304
0
285
57
143, 144



ACL64704
0.99
5.4.3.8
1350
449
0
455
48
145, 146



AAQ63611
2.00E−05
5.4.3.8
1383
460
0
454
44
147, 148



ADS57112
0.004
5.4.3.8
1377
458
0
455
46
149, 150



ADE53957
2.4
2.6.1.21
852
283
0
283
40
151, 152



ACL64518
0.24
5.4.3.8
1269
422
0
455
46
153, 154



ADT43944
3.00E−04
5.4.3.8
1362
453
0
443
46
155, 156



ABQ42663
2.5
2.6.1.21
879
292
0
283
48
157, 158



ACA38856
0.58
2.6.1.42
822
273
0
277
36
159, 160



ADS56887
2.4
2.6.1.21
861
286
0
287
87
161, 162



ACL64750
0.065
5.4.3.8
1377
458
0
455
44
163, 164



ADS63519
7.00E−11
5.4.3.8
1314
437
0
455
46
165, 166



ABL03988
2.4
2.6.1.21
861
286
0
282
60
167, 168



ACA37578
2.00E−53
4.1.3.38
882
293
0
293
85
169, 170



ABL03988
2.4
2.6.1.21
864
287
0
282
62
171, 172



AED18099
0.039
2.6.1.21
861
286
0
282
62
173, 174



AAF81809
0.61
2.6.1.21
861
286
0
282
62
175, 176



ADM27081
0.004
5.4.3.8
1374
457
0
454
47
177, 178



ADX27642
2.4
2.6.1.21
855
284
0
288
41
179, 180



ABL61996
0.62
2.6.1.42
876
291
861
286
39
181, 182



ADY80523
2.3
2.6.1.21
825
274
867
288
41
183, 184



ADY80523
2.3
2.6.1.21
825
274
867
288
41
185, 186



AAL04589
2.4
2.6.1.21
861
286
0
282
61
187, 188



ABL25490
0.62
2.6.1.21
864
287
0
282
62
189, 190



AAL04589
2.4
2.6.1.21
861
286
0
282
61
191, 192



AAL04589
2.4
2.6.1.21
861
286
0
282
61
193, 194



ADL41705
0.61
2.6.1.21
858
285
0
282
42
195, 196



AEM18017
0.003
2.6.1.21
858
285
0
282
40
197, 198



ABK78375
2.4
2.6.1.21
858
285
0
282
42
199, 200



ACF67498
0.15
2.6.1.21
855
284
0
281
40
201, 202



ACA40289
0.17
2.6.1.42
921
306
0
306
34
203, 204



ADY80523
2.3
2.6.1.21
825
274
867
288
41
205, 206



ABQ99281
0.15
2.6.1.21
825
274
867
288
40
207, 208



ADH48029
0.001
5.4.3.8
1374
457
0
454
44
209, 210



AAI92131
0.053
2.6.1.9
1137
378
0
367
29
211, 212



ADX37088
0.6
2.6.1.21
849
282
0
282
61
213, 214



ADS57580
0.004
5.4.3.8
1386
461
0
454
49
215, 216



ADY80523
2.3
2.6.1.21
825
274
867
288
41
217, 218



ABZ36033
0.16
2.6.1.21
861
286
0
282
62
219, 220



ACN44196
2.3
2.6.1.21
840
279
0
281
43
221, 222



AFB66287
0.62
2.6.1.21
867
288
867
288
60
223, 224



AED18099
0.039
2.6.1.21
861
286
0
282
61
225, 226



AED18099
0.61
2.6.1.21
861
286
0
282
62
227, 228



AED18099
0.62
2.6.1.21
873
290
0
282
60
229, 230



AED18099
0.62
2.6.1.21
864
287
0
282
61
231, 232



ABL22310
0.58
2.6.1.42
822
273
0
277
35
233, 234



ADT43796
0.65
2.6.1.42
906
301
1992
303

235, 236



AAI70509
2.3
2.6.1.21
837
278
0
294
44
237, 238



AEM18017
0.038
2.6.1.21
843
280
870
282

239, 240



ADY80523
2.3
2.6.1.21
825
274
867
288
41
241, 242



ADY80523
2.3
2.6.1.21
825
274
867
288
41
243, 244



ADS56672
2.00E−28
2.6.1.57
909
302
0
398
90
245, 246



ABA93421
0.61
2.6.1.21
861
286
0
282
62
247, 248



ACL64761
0.15
2.6.1.42
837
278
0
280
34
249, 250



ADQ03059
8.00E−04
1.4.99.1
138
45
0
417
93
251, 252



ADA71348
0.92
1.4.99.1
1260
419
0
456
61
253, 254



ACA26961
0.004
1.4.99.1
1233
410
0
410
84
255, 256



ACL70702
0.058
1.4.99.1
1233
410
0
412
70
257, 258



ABN17150
4.00E−12
1.4.99.1
1254
417
0
421
66
259, 260



AEB45551
3.6
1 . . .
1248
415
0
417
65
261, 262



AAV30459
1.00E−12
1.4.99.1
1254
417
1257
418
66
263, 264



ADS63414
7.00E−22
1.5.1.5
747
248
0
287
79
265, 266



AEH53102
0.001
1.4.99.1
1254
417
0
418
71
267, 268



ABD08815
3.00E−90
1.4.99.1
1299
432
0
432
78
269, 270



AAL40781
0.23
1.4.99.1
1239
412
0
414
59
271, 272



ADY72597
0.23
1.4.99.1
1257
418
1251
416
48
273, 274



ACL64753
0.92
1.4.99.1
1254
417
0
433
70
275, 276



ABL23528
0.92
1.4.99.1
1254
417
0
433
69
277, 278



ADS56371
3.6
1.4.99.1
1251
416
0
417
50
279, 280



AEC16041
0.058
1.4.99.1
1242
413
0
416
63
281, 282



ADQ03059
4.00E−12
1.4.99.1
1263
420
0
421
62
283, 284



ABQ98347
3.7
1.4.99.1
1263
420
0
416
40
285, 286



ABL11756
0.92
1.4.99.1
1257
418
0
416
52
287, 288



ACL64803
0.06
1.4.99.1
1284
427
0
417
52
289, 290



AEH54372
0.92
1.4.99.1
1263
420
0
416
56
291, 292



ADT06724
0.23
1.4.99.1
1245
414
0
414
91
293, 294



AAV06555
0.24
1.4.99.1
1296
431
0
427
42
295, 296



ADA32153
3.6
1.4.99.1
1242
413
0
419
74
297, 298



ADA32153
3.6
1.4.99.1
1242
413
0
419
74
299, 300



ABD16228
0.92
1 . . .
1254
417
0
415
66
301, 302



AEH53102
0.059
1.4.99.1
1269
422
0
416
42
303, 304



AEH53102
0
1.4.99.1
1299
432
0
434
93
305, 306



ADR84929
0.24
1 . . .
1320
439
0
415
51
307, 308



ADC87621
0.001
1.4.99.1
1242
413
0
427
44
309, 310



ABD01189
3.00E−13
1.4.99.1
1266
421
0
421
95
311, 312



ADS56475
3.6
1.4.99.1
1245
414
0
417
52
313, 314



AAI99682
0.058
1.4.99.1
1236
411
0
414
60
315, 316



ADZ00150
0.91
1.4.99.1
1245
414
0
416
43
317, 318



ACA26563
0.052
1.1.1.35
1110
369
0
648
47
319, 320



ACA26625
0.004
1.4.99.1
1248
415
0
416
68
321, 322



ADS56305
0.015
1.4.99.1
1245
414
0
414
97
323, 324



ABD08815
########
1.4.99.1
1302
433
0
434
98
325, 326



ADT47109
0.059
1.4.99.1
1254
417
1251
416
49
327, 328



ACA32282
0.91
1.4.99.1
1251
416
0
416
43
329, 330



ABD01189
1.00E−09
1.4.99.1
1266
421
0
421
79
331, 332



ACA26563
0.052
1.1.1.35
1110
369
0
648
47
333, 334



ACA26625
0.004
1.4.99.1
1248
415
0
416
68
335, 336



AEI59268
0.91
1.4.99.1
1248
415
0
417
49
337, 338



ADC85461
0.91
1.4.99.1
1245
414
0
427
42
339, 340



ACA26625
0.91
1.4.99.1
1248
415
0
416
68
341, 342



ADS58499
0.008
1.1.1.184
693
230
0
228
48
343, 344



ABN17150
4.00E−09
1.4.99.1
1260
419
0
427
43
345, 346



ACL64399
0.23
1 . . .
1245
414
0
417
63
347, 348



ACL64798
0.91
1.4.99.1
1251
416
0
417
51
349, 350



ADT17628
0.92
1.4.99.1
1260
419
0
456
61
351, 352



AED50859
0.059
1.4.99.1
1263
420
0
416
40
353, 354



ADS56451
8.00E−07
1.2.1.39
1020
339
0
524
55
355, 356



ABD32968
0.91
1.4.99.1
1251
416
0
427
40
357, 358



ABD00632
0.23
1.4.99.1
1251
416
0
415
68
359, 360



ABD00632
0.23
1.4.99.1
1251
416
0
415
68
361, 362



ABD00632
0.23
1.4.99.1
1251
416
0
415
68
363, 364



ABD01189
2.00E−11
1.4.99.1
1266
421
0
421
93
365, 366



ABD01189
3.00E−07
1.4.99.1
1317
438
0
443
80
367, 368



AEI27664
0.23
1.4.99.1
1245
414
0
427
44
369, 370



AAV30459
1.00E−15
1.4.99.1
1266
421
0
421
94
371, 372



ADS56859
0.23
1.4.99.1
1260
419
0
414
57
373, 374



ADX06332
3.6
1.4.99.1
1257
418
0
415
43
375, 376



AAK69489
0.23
1.4.99.1
1245
414
0
416
51
377, 378



AED48875
0.015
1.4.99.1
1257
418
0
427
43
379, 380



ABD00632
0.23
1.4.99.1
1251
416
0
415
68
381, 382



ADQ03059
7.00E−11
1.4.99.1
1260
419
1257
418
88
383, 384



ABA19863
0.91
1.4.99.1
1245
414
0
427
42
385, 386



AAZ19073
0.91
1.4.99.1
1251
416
1251
416
75
387, 388



ABD01189
2.00E−08
1.4.99.1
1317
438
0
443
80
389, 390



ADB80216
0.92
1.4.99.1
1257
418
0
416
55
391, 392



AEH53102
0.001
1.4.99.1
1257
418
0
416
51
393, 394



ADX30055
0.058
1.4.99.1
1242
413
0
414
88
395, 396



ADT43936
0.015
1.4.99.1
1245
414
0
417
52
397, 398



ADL62778
0.23
1.4.99.1
1242
413
0
427
44
399, 400



AAD06652
3.6
1.4.99.1
1260
419
0
427
33
401, 402



ABQ80343
3.6
1.4.99.1
1257
418
0
427
47
403, 404



ADW91994
0.91
1.4.99.1
1239
412
0
417
42
405, 406



ABD01189
2.00E−11
1.4.99.1
1266
421
0
421
94
407, 408



ADQ18897
0.92
1.4.99.1
1260
419
0
427
45
409, 410



ADS55665
4.00E−09
1.2.1.4
1242
413
0
526
50
411, 412



ACA25332
0.23
1.4.99.1
1248
415
0
417
52
413, 414



ABL20166
0.015
1.4.99.1
1242
413
0
417
53
415, 416



ACD81455
3.00E−10
1.4.99.1
1248
415
1257
418
73
417, 418



ADQ03059
2.00E−05
1.4.99.1
1326
441
0
445
76
419, 420



ACA37735
0.24
1.4.99.1
1293
430
0
419
49
421, 422



ABL70446
0.91
1.4.99.1
1245
414
0
427
43
423, 424



ADJ44795
0.92
1.4.99.1
1260
419
0
416
53
425, 426



ADS57588
0.92
1.4.99.1
1254
417
0
433
72
427, 428



AAT42063
0.059
1.4.99.1
1263
420
0
427
44
429, 430



ADF77343
0.91
1.4.99.1
1242
413
0
427
49
431, 432



AEF68383
0.23
1.4.99.1
1245
414
0
417
52
433, 434



ADB80390
0.92
1.4.99.1
1254
417
0
417
51
435, 436



ACL28407
1.2
1.2.99.2
453
150
0
150
84
437, 438



ADS63732
2.2

780
259
0
260
64
439, 440



AEB49411
0.22

1182
393
0
393
76
441, 442



ACA26463
0.06
1 . . .
1272
423
0
417
61
443, 444



AEK18770
0.015
1.4.99.1
1245
414
0
415
69
445, 446



ABD08815
4.00E−37
1.4.99.1
1308
435
0
434
84
447, 448



ABD03414
0.015
1.4.99.1
1248
415
0
416
48
449, 450



ACA23380
0.23
1 . . .
1245
414
0
416
62
451, 452



ABN24675
0.92
1 . . .
1254
417
0
417
53
453, 454



ACA64961
0.91
1.4.99.1
1242
413
0
427
45
455, 456



ABL10568
0.23
1.4.99.1
1251
416
0
416
68
457, 458



ABL12550
3.7
1.4.99.1
1266
421
0
410
78
459, 460



ACH99914
6.00E−04
1 . . .
762
253
0
254
76
461, 462



ADQ64455
0.23
1.4.99.1
1248
415
0
415
69
463, 464



AAC90078
8.00E−05
1.1.1.95
447
148
0
334
34
465, 466



AEI59858
0.23
1.4.99.1
1242
413
0
414
55
467, 468



ADZ13449
0.91
1 . . .
1245
414
0
415
66
469, 470



AAS77111
0
1.4.99.1
1299
432
0
434
100
471, 472



ACF04822
0.91
1 . . .
1248
415
0
417
64
473, 474



ADN97550
0.25
1.4.99.1
1341
446
0
427
62
475, 476



ACN44608
0.001
1.4.99.1
1239
412
0
416
38
477, 478



ACN44608
0.001
1.4.99.1
1239
412
0
416
38
479, 480



ADF69167
0.059
1.4.99.1
1251
416
0
416
69
481, 482



ABD08815
0.001
1.4.99.1
1311
436
0
443
82
483, 484



ABN17150
2.00E−11
1.4.99.1
1269
422
0
421
67
485, 486



ADI37347
3.7
1 . . .
1263
420
0
417
53
487, 488



ADS57628
0.91
1.4.99.1
1242
413
0
417
54
489, 490



ACA26589
0.015
1.4.99.1
1290
429
0
427
41
491, 492



ADO81756
0.063
1.4.99.1
1344
447
0
427
41
493, 494



ADO81304
0.92
1.4.99.1
1254
417
0
417
49
495, 496



ABL27820
3.7
1 . . .
1263
420
0
417
53
497, 498



AAL04340
0.91
1.4.99.1
1245
414
0
417
49
499, 500



AAF71906
0.11
1.5.1.12
2334
777
0
1158
48
501, 502



ADS59567
0.015
1.4.99.1
1263
420
0
416
49
503, 504



ACF64502
0.93
1.4.99.1
1266
421
0
416
50
505, 506



ACL63896
0.059
1.4.99.1
1254
417
0
433
71
507, 508



ADP48960
3.6
1.4.99.1
1245
414
0
417
49
509, 510



ACH97397
0.015
1.4.99.1
1266
421
0
414
65
511, 512



ACA35076
2.00E−04
1.4.99.1
1269
422
0
443
77
513, 514



AEF51726
0.91
1.4.99.1
1242
413
0
419
74
515, 516



ACA63029
0.058
1.4.99.1
1239
412
0
415
48
517, 518



AAX91990
0.015
1.4.99.1
1251
416
0
416
43
519, 520



ABK13581
0.015
1.4.99.1
1254
417
0
415
79
521, 522



ACN44966
0.23
1.4.99.1
1245
414
0
415
40
523, 524



AAA58472
0.91
1 . . .
1242
413
0
416
61
525, 526



ADS59863
0.058
1 . . .
1248
415
0
415
78
527, 528



ADZ14743
0.058
1.4.99.1
1245
414
0
433
53
529, 530



ABD17880
0.001
1.4.99.1
1257
418
0
429
59
531, 532



ACA35414
0.93
1.4.99.1
1269
422
0
416
40
533, 534



ADS55665
1.00E−12
1.2.1.
1581
526
0
525
52
535, 536



ABN88913
3.6
1.4.99.1
1260
419
0
414
57
537, 538



ABD17784
0.058
1.4.99.1
1242
413
0
413
96
539, 540



ABQ90794
0.059
1.4.99.1
1266
421
1251
416
57
541, 542



ADF77343
3.6
1.4.99.1
1248
415
0
427
45
543, 544



AAC41739
0.24
1.4.99.1
1296
431
0
417
50
545, 546



ADS50144
0.93
1.4.99.1
1266
421
0
416
39
547, 548



AAL13181
2.00E−04
1.4.99.1
1254
417
0
429
59
549, 550



ACF64460
0.003
1.5.1.12
3306
1101
0
1158
49
551, 552



ADO81304
0.92
1.4.99.1
1254
417
0
417
49
553, 554



ADZ14743
0.058
1.4.99.1
1242
413
0
433
53
555, 556



ACN44650
0.23
1 . . .
1260
419
0
417
55
557, 558



ACN44650
0.23
1 . . .
1260
419
0
417
55
559, 560



ACL64800
2.00E−05
1.6.99.3
1230
409
1293
430
62
561, 562



AAA55186
5.00E−04
1.1.1.100
720
239
0
270
56
563, 564



ADO81304
0.92
1.4.99.1
1254
417
0
417
49
565, 566



ACH97385
0.016
1.4.99.1
1344
447
0
444
69
567, 568



ABX92073
0.92
1.4.99.1
1260
419
0
427
42
569, 570



ABD01189
3.00E−13
1.4.99.1
1248
415
1257
418
76
571, 572



ACA26568
0.059
1.4.99.1
1263
420
0
417
39
573, 574



ADS56451
2.00E−08
1.2.1.
1584
527
0
530
53
575, 576



ACL64632
0.91
1 . . .
1242
413
0
415
67
577, 578



AAV30459
7.00E−51
1.4.99.1
1254
417
0
422
83
579, 580



AEG64174
0.92
1.4.99.1
1260
419
0
414
57
581, 582



ABD13052
3.6
1.4.99.1
1233
410
0
410
83
583, 584



ABD01189
3.00E−04
1.4.99.1
1338
445
0
455
81
585, 586



ABL10910
0.24
1.4.99.1
1290
429
0
414
57
587, 588



ACL64760
0.92
1.4.99.1
1254
417
0
415
78
589, 590



ADX35599
0.015
1 . . .
1245
414
0
417
59
591, 592



ACA26173
0.015
1.4.99.1
1272
423
0
417
50
593, 594



ADS55748
0.015
1.4.99.1
1257
418
0
433
73
595, 596



AEH53102
3.00E−19
1.4.99.1
1317
438
0
435
71
597, 598



AAV30459
1.00E−61
1.4.99.1
1251
416
0
422
84
599, 600



AAV30459
2.00E−60
1.4.99.1
1254
417
0
422
81
601, 602



ABX86147
0.23
1.4.99.1
1254
417
0
416
42
603, 604



ADS56578
0.92
1 . . .
1254
417
0
417
67
605, 606



ADZ49334
0.91
1.4.99.1
1251
416
0
429
51
607, 608



ADT18820
0.004
1 . . .
1233
410
0
416
61
609, 610



AAV30459
7.00E−51
1.4.99.1
1254
417
0
422
83
611, 612



ABQ66079
0.24
1.4.99.1
1287
428
0
423
43
613, 614



ACL64301
0.91
1 . . .
1248
415
0
415
79
615, 616



ADX64511
0.015
1.4.99.1
1245
414
0
417
49
617, 618



ADS55665
1.00E−12
1.2.1.39
1593
530
0
526
51
619, 620



ABQ81842
0.059
1.4.99.1
1266
421
0
416
42
621, 622



ABD08815
3.00E−07
1.4.99.1
1260
419
0
436
55
623, 624



ADQ03059
4.00E−09
1.4.99.1
1254
417
0
416
79
625, 626



ADQ03059
0.059
1.4.99.1
1257
418
0
429
60
627, 628



ADQ74672
0.17
1 . . .
921
306
74787
305

629, 630



ACL30152
0.015
1.4.99.1
1233
410
0
465
86
631, 632



ABD08815
8.00E−23
1.4.99.1
1293
430
0
432
74
633, 634



ABD08815
2.00E−32
1.4.99.1
1296
431
0
432
76
635, 636



ABD05088
2.00E−66
1.1.99.
1128
375
0
375
87
637, 638



ACA27410
0.18
1.1.1.
1002
333
0
345
44
639, 640



ABD05088
2.00E−66
1.1.99.
1128
375
0
375
87
641, 642



ABN17150
0.059
1.4.99.1
1266
421
0
422
42
643, 644



AEM45684
0.23
1 . . .
1245
414
0
414
62
645, 646



ABD08815
4.00E−06
1.4.99.1
1296
431
0
428
65
647, 648



ABD05284
0.058
1.4.99.1
1245
414
0
414
61
649, 650



ACA27392
0.058
1.4.99.1
1236
411
0
410
53
651, 652



ACA36215
1.00E−15
1.8.1.7
1344
447
0
456
55
653, 654



ACF04822
0.94
1.4.99.1
1284
427
0
417
48
655, 656



AAD55815
2.9
1.4.3.3
1008
335
0
314
45
657, 658



AAL13181
0.001
1.4.99.1
1245
414
0
418
62
659, 660



ADJ40271
0.056

1188
395
0
404
50
661, 662



ADX45957
0.058
1.4.99.1
1245
414
0
417
52
663, 664



ABT17713
0.92
1.4.99.1
1263
420
0
423
41
665, 666



AAS83512
0.81
1.4.3.1
1113
370
0
377
45
667, 668



AAV21187
0.92
1.4.99.1
1260
419
0
417
52
669, 670



ABQ19293
3.6
1.4.99.1
1242
413
0
413
82
671, 672



ABQ19293
3.6
1.4.99.1
1242
413
0
413
82
673, 674



ABQ19293
3.6
1.4.99.1
1242
413
0
413
82
675, 676



ACA45556
0.65
1.4.3.3
909
302
0
310
42
677, 678



ABD04986
4.00E−09
1.1.99.
1161
386
0
385
83
679, 680



ADC76718
0.93
1.4.99.1
1266
421
0
423
43
681, 682



AAF71130
0.059
1.4.99.1
1251
416
0
421
42
683, 684



ABT07579
0.06
1.4.99.1
1281
426
0
421
40
685, 686



ADS56436
0.044
1.4.3.3
957
318
0
314
44
687, 688



ADX50476
0.23
1.4.99.1
1248
415
0
548
64
689, 690



AAA81470
0.058
1.4.99.1
1239
412
0
422
66
691, 692



ACA34135
3.9
1.6.99.3
396
131
0
132
73
693, 694



ABD05088
1.00E−12
1.1.99.
1164
387
0
388
63
695, 696



ADT43170
0.001
1.4.99.1
1257
418
0
422
47
697, 698



ACA26065
0.015
1.4.99.1
1245
414
0
417
52
699, 700



ABL13112
0.18
1.4.3.3
981
326
0
314
39
701, 702



ADM27081
0.23
1.4.99.1
1248
415
0
417
50
703, 704



ABD08105
0.23
1.4.99.1
1233
410
0
410
56
705, 706



ADY66589
0.06
1.4.99.1
1275
424
0
417
52
707, 708



ADT43021
0.23
1.4.99.1
1233
410
0
410
75
709, 710



ADA48957
0.23
1.4.99.1
1266
421
0
421
43
711, 712



ADT43021
0.23
1.4.99.1
1233
410
0
410
75
713, 714



AET00128
0.91
1.4.99.1
1251
416
0
420
43
715, 716




0

912
303
0
358
29
717, 718



ABD10326
3.6
1.4.99.1
1251
416
0
417
57
719, 720



ADT44787
0.042
1.4.3.3
918
305
0
310
42
721, 722



AAL13181
0.001
1.4.99.1
1251
416
0
423
41
723, 724



ABN17150
1.00E−12
1.4.99.1
1260
419
0
418
56
725, 726



ABL15242
3.9
1.4.99.1
1329
442
0
423
56
727, 728



ABD01828
0.051
1.2.7.3
1098
365
0
576
65
729, 730



AAL13181
1.00E−06
1.4.99.1
1260
419
0
420
41
731, 732



ADS63429
0.23
1.4.99.1
1257
418
0
420
44
733, 734



ACL64584
2.00E−06
1.1.2.4
807
268
0
477
48
735, 736



ABD10634
0.058
1.4.99.1
1242
413
0
414
62
737, 738



AAD07816
0.91
1 . . .
1245
414
0
414
63
739, 740



AAD07816
0.91
1 . . .
1245
414
0
414
63
741, 742



ABD10634
0.058
1.4.99.1
1242
413
0
414
62
743, 744



AER28868
0.83
1.1.99.
1146
381
0
385
49
745, 746



ABD08815
0.015
1.4.99.1
1278
425
0
462
53
747, 748



AAL13181
2.00E−07
1.4.99.1
1245
414
0
418
60
749, 750



ACA23297
0.65
1.14.13.
915
304
0
543
49
751, 752



ADD01267
0.23
1.4.99.1
1248
415
0
417
52
753, 754




0
1.4.99.1
1245
414
0
417
51
755, 756



ADJ09909
3.6
1.4.99.1
1251
416
0
410
55
757, 758



AEH18256
0.23
1.4.99.1
1254
417
0
417
49
759, 760



ADR47152
0.23
1.4.99.1
1242
413
0
414
62
761, 762



AAL13181
0.001
1.4.99.1
1251
416
0
421
41
763, 764



ADS59768
9.00E−07
1.1.2.4
1182
393
0
477
51
765, 766



AAL13181
0.015
1.4.99.1
1257
418
0
421
41
767, 768



ACA37735
0.015
1.4.99.1
1242
413
0
414
62
769, 770



ABD14131
0.91
1.4.99.1
1245
414
0
417
53
771, 772



ADR47152
0.23
1.4.99.1
1242
413
0
414
62
773, 774



ABT17832
3.7
1.4.99.1
1272
423
0
423
38
775, 776



ACA26366
0.9
1.4.99.1
1233
410
0
410
92
777, 778



ACL30152
0.23
1.4.99.1
1233
410
0
465
86
779, 780



AEA26962
0.06
1.4.99.1
1272
423
0
422
52
781, 782



ADT42301
9.00E−10
1.1.2.4
1137
378
0
477
51
783, 784



ABD08815
0.001
1.4.99.1
1251
416
0
421
41
785, 786



AAL13181
0.001
1.4.99.1
1251
416
0
420
42
787, 788



ACA39870
0.23
1.4.99.1
1248
415
0
410
46
789, 790



ADQ24247
3
1.3.1.26
1044
347
0
333
50
791, 792



ADT18820
0.004
1 . . .
1233
410
1254
417
63
793, 794



AEM45684
0.007
1.2.7.8
2313
770
0
1173
61
795, 796



ADT47055
1.00E−06
1.1.2.4
1437
478
0
477
53
797, 798



ACH13524
0.015
1.4.99.1
1281
426
0
421
42
799, 800



ADS63429
0.23
1.4.99.1
1257
418
0
420
44
801, 802



ADJ41976
0.92
1.4.99.1
1257
418
0
421
42
803, 804



ABZ40619
4.00E−09
1.1.2.4
1323
440
0
477
53
805, 806



AAF66669
0.25
1.4.99.1
1329
442
0
423
55
807, 808



ABQ81849
0.91
1.4.99.1
1242
413
0
413
81
809, 810



ABQ81849
0.91
1.4.99.1
1242
413
0
413
81
811, 812



ABQ81849
0.91
1.4.99.1
1242
413
0
413
81
813, 814



ABQ81849
0.91
1.4.99.1
1242
413
0
413
81
815, 816



AEH53102
0.004
1.4.99.1
1269
422
0
421
43
817, 818



ABN17150
0.015
1.4.99.1
1263
420
0
420
54
819, 820



ABD10634
0.058
1.4.99.1
1242
413
0
414
62
821, 822



AAV72125
2.00E−04
1.5.3.1
1170
389
1167
388
77
823, 824



ABD04986
1.00E−12
1.1.99.
1146
381
0
385
90
825, 826



AEA26962
0.06
1.4.99.1
1272
423
0
422
52
827, 828



ABD08815
6.00E−05
1.4.99.1
1281
426
0
421
40
829, 830



ABD04986
2.00E−11
1.1.99.
1137
378
1152
383
49
831, 832



ADS63429
0.23
1.4.99.1
1257
418
0
420
44
833, 834



ADS56646
8.00E−14
1.1.2.4
1395
464
0
477
52
835, 836



AEK59509
0.68
1.4.3.1
942
313
0
314
39
837, 838



ABQ81849
0.91
1.4.99.1
1242
413
0
413
81
839, 840



ABN17150
2.00E−05
1.4.99.1
1269
422
0
418
52
841, 842



ABD08815
1.00E−43
1.4.99.1
1290
429
0
428
72
843, 844



AAD56788
0.23
1.4.99.1
1233
410
0
410
93
845, 846



ABD05088
2.00E−51
1.1.99.
1131
376
0
375
77
847, 848



AEH53102
0.004
1.4.99.1
1269
422
0
421
43
849, 850



AAI99682
0.18
1.4.3.3
975
324
4.00E+06
326

851, 852



ABD05088
2.00E−51
1.1.99.
1131
376
0
375
77
853, 854



ABD04986
1.00E−05
1.1.99.
1173
390
0
390
99
855, 856



ABD04986
1.00E−05
1.1.99.
1173
390
0
390
99
857, 858



ABD04986
1.00E−05
1.1.99.
1173
390
0
390
99
859, 860



AED11687
5.00E−08
1.4.3.3
987
328
0
326
46
861, 862



ABD08815
0
1.4.99.1
1299
432
0
433
88
863, 864




2.7
2.6.1.21
861
286
690
282
37
865, 866




0.003
2.6.1.9
1062
353
12392
373
30
867, 868




2.00E−25
2.6.1.21
852
283
1140
283
78
869, 870




1.1
5.4.3.8
1350
449
3784
417
46
871, 872




0.071
5.4.3.8
1401
466
1358
417
44
873, 874




1.00E−09
5.4.3.8
1344
447
37500
417
48
875, 876




0.018
5.4.3.8
1389
462
231
417
43
877, 878




0.018
5.4.3.8
1398
465
1356
417
43
879, 880




2.7
2.6.1.21
873
290
1653
282
39
881, 882





2.6.1.21

292

283
42
883, 884




2.7
2.6.1.21
861
286
19976
283
40
885, 886




0.63
2.6.1.42
801
266
799
284
37
887, 888




0.66
2.6.1.21
840
279
264
282
41
889, 890




0.67
2.6.1.21
861
286
599
283
39
891, 892




0.17
2.6.1.21
861
286
44577
283
37
893, 894




0.66
2.6.1.21
849
282
16714
289
39
895, 896




7.00E−08
5.4.3.8
1353
450
1287
417
47
897, 898




1.00E−09
5.4.3.8
1362
453
37500
417
47
899, 900




0.001
5.4.3.8
1386
461
1341
417
49
901, 902




0.07
5.4.3.8
1383
460
870
417
47
903, 904




2.7
2.6.1.21
864
287
5766
298
46
905, 906




0.042
2.6.1.42
831
276
591
284
36
907, 908




0
2.6.1.21
855
284
1709
284
97
909, 910




0.17
2.6.1.21
876
291
4862
278
36
911, 912




2.6
2.6.1.21
852
283
7166
282
43
913, 914




2.00E−05
5.4.3.8
1383
460
1701
417
41
915, 916




0.72
2.6.1.21
915
304
652
282
39
917, 918




1.1
5.4.3.8
1350
449
18471
417
46
919, 920




0.07
5.4.3.8
1377
458
20250
417
48
921, 922




2.7
2.6.1.21
861
286
864
298
50
923, 924




0.004
5.4.3.8
1377
458
1251
417
44
925, 926




0
2.6.1.1
1185
394
1185
394
100
927, 928





2.6.1.42

322

317
100
929, 930





2.6.1.62

519

461
100
931, 932




3.8
2.6.1.1
1206
401
9502
387
33
933, 934




0
2.6.1.62
1383
460
1383
460
100
935, 936




2.6
2.6.1.21
855
284
2000
298
48
937, 938




0.67
2.6.1.21
855
284
86941
298
39
939, 940




2.7
2.6.1.21
879
292
2840
298
41
941, 942




0.17
2.6.1.21
870
289
1899
283
40
943, 944




0.011
2.6.1.21
855
284
636
283
39
945, 946




0.042
2.6.1.21
837
278
897
282
40
947, 948





2.6.1.42

305

310
33
949, 950



AAS46730
3.6
2.6.1.1
1206
401
9502
387

951, 952



ADS45406
0
2.6.1.1
1185
394
0
394
100
953, 954



ADS78244
0
2.6.1.42
879
292
954
317

955, 956



ADS78324
0
2.6.1.62
1386
461
0
460
72
957, 958



ADS78290
0
2.6.1.62
1383
460
1383
460

959, 960










The invention provides variants of polynucleotides or polypeptides of the invention, which comprise sequences modified at one or more base pairs, codons, introns, exons, or amino acid residues (respectively) yet still retain the biological activity of a transferase, e.g., a transaminase, e.g., a d-amino-acid transferase, and/or an oxidoreductase, e.g., a dehydrogenase, e.g., a d-amino-acid dehydrogenase of the invention. Variants can be produced by any number of means included methods such as, for example, error-prone PCR, shuffling, oligonucleotide-directed mutagenesis, assembly PCR, sexual PCR mutagenesis, in vivo mutagenesis, cassette mutagenesis, recursive ensemble mutagenesis, exponential ensemble mutagenesis, site-specific mutagenesis, gene reassembly (e.g., GeneReassembly, see, e.g., U.S. Pat. No. 6,537,776), GSSM and any combination thereof.
The term “saturation mutagenesis”, “gene site saturation mutagenesis” or “GSSM” includes a method that uses degenerate oligonucleotide primers to introduce point mutations into a polynucleotide, as described in detail, below.
The term “optimized directed evolution system” or “optimized directed evolution” includes a method for reassembling fragments of related nucleic acid sequences, e.g., related genes, and explained in detail, below.
The term “synthetic ligation reassembly” or “SLR” includes a method of ligating oligonucleotide fragments in a non-stochastic fashion, and explained in detail, below.
Generating and Manipulating Nucleic Acids
The invention provides nucleic acids (e.g., nucleic acids encoding polypeptides having a transferase activity, e.g., a transaminase activity, e.g., a d-amino-acid transferase activity, and/or an oxidoreductase activity, e.g., a dehydrogenase activity, e.g., a d-amino-acid dehydrogenase activity; including enzymes having at least one sequence modification of an exemplary nucleic acid sequence of the invention (as defined above), wherein the sequence modification comprises one or more nucleotide residue changes (or the equivalent thereof), including expression cassettes such as expression vectors, encoding the polypeptides of the invention.
The invention also includes methods for discovering new transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase sequences using the nucleic acids of the invention. The invention also includes methods for inhibiting the expression of transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase genes, transcripts and polypeptides using the nucleic acids of the invention. Also provided are methods for modifying the nucleic acids of the invention by, e.g., synthetic ligation reassembly, optimized directed evolution system and/or saturation mutagenesis.
The nucleic acids of the invention can be made, isolated and/or manipulated by, e.g., cloning and expression of cDNA libraries, amplification of message or genomic DNA by PCR, and the like.
In one aspect, the invention also provides transferase-, e.g., transaminase-, e.g., d-amino-acid transferase-, and/or oxidoreductase-, e.g., dehydrogenase-, e.g., d-amino-acid dehydrogenase-encoding nucleic acids with a common novelty in that they are derived from an environmental source, or a bacterial source, or an archaeal source.
In practicing the methods of the invention, homologous genes can be modified by manipulating a template nucleic acid, as described herein. The invention can be practiced in conjunction with any method or protocol or device known in the art, which are well described in the scientific and patent literature.
One aspect of the invention is an isolated, synthetic or recombinant nucleic acid comprising one of the sequences of The invention and sequences substantially identical thereto, the sequences complementary thereto, or a fragment comprising at least 10, 15, 20, 25, 30, 35, 40, 50, 75, 100, 150, 200, 300, 400, or 500 consecutive bases of one of the sequences of a Sequence of the invention (or the sequences complementary thereto). The isolated, nucleic acids may comprise DNA, including cDNA, genomic DNA and synthetic DNA. The DNA may be double-stranded or single-stranded and if single stranded may be the coding strand or non-coding (antisense) strand. Alternatively, the isolated, synthetic or recombinant nucleic acids of the invention may comprise RNA.
Accordingly, another aspect of the invention is an isolated, synthetic or recombinant nucleic acid which encodes one of the polypeptides of the invention, or fragments comprising at least 5, 10, 15, 20, 25, 30, 35, 40, 50, 75, 100, or 150 consecutive amino acids of one of the polypeptides of the invention. The coding sequences of these nucleic acids may be identical to one of the coding sequences of one of the nucleic acids of the invention, or a fragment thereof or may be different coding sequences which encode one of the polypeptides of the invention, sequences substantially identical thereto and fragments having at least 5, 10, 15, 20, 25, 30, 35, 40, 50, 75, 100, or 150 consecutive amino acids of one of the polypeptides of the invention, as a result of the redundancy or degeneracy of the genetic code. The genetic code is well known to those of skill in the art and can be obtained, for example, on page 214 of B. Lewin, Genes VI, Oxford University Press, 1997.
The isolated, synthetic or recombinant nucleic acid which encodes one of the polypeptides of the invention and sequences substantially identical thereto, may include, but is not limited to: only the coding sequence of a nucleic acid of the invention and sequences substantially identical thereto and additional coding sequences, such as leader sequences or proprotein sequences and non-coding sequences, such as introns or non-coding sequences 5′ and/or 3′ of the coding sequence. Thus, as used herein, the term “polynucleotide encoding a polypeptide” encompasses a polynucleotide which includes only the coding sequence for the polypeptide as well as a polynucleotide which includes additional coding and/or non-coding sequence.
Alternatively, the nucleic acid sequences of the invention and sequences substantially identical thereto, may be mutagenized using conventional techniques, such as site directed mutagenesis, or other techniques familiar to those skilled in the art, to introduce silent changes into the polynucleotides of the invention and sequences substantially identical thereto. As used herein, “silent changes” include, for example, changes which do not alter the amino acid sequence encoded by the polynucleotide. Such changes may be desirable in order to increase the level of the polypeptide produced by host cells containing a vector encoding the polypeptide by introducing codons or codon pairs which occur frequently in the host organism.
The invention also relates to polynucleotides which have nucleotide changes which result in amino acid substitutions, additions, deletions, fusions and truncations in the polypeptides of the invention and sequences substantially identical thereto. Such nucleotide changes may be introduced using techniques such as site directed mutagenesis, random chemical mutagenesis, exonuclease III deletion and other recombinant DNA techniques. Alternatively, such nucleotide changes may be naturally occurring allelic variants which are isolated by identifying nucleic acids which specifically hybridize to probes comprising at least 10, 15, 20, 25, 30, 35, 40, 50, 75, 100, 150, 200, 300, 400, or 500 consecutive bases of one of the sequences of The invention and sequences substantially identical thereto (or the sequences complementary thereto) under conditions of high, moderate, or low stringency as provided herein.
General Techniques
The nucleic acids used to practice this invention, whether RNA, iRNA, antisense nucleic acid, cDNA, genomic DNA, vectors, viruses or hybrids thereof, may be isolated from a variety of sources, genetically engineered, amplified, and/or expressed/generated recombinantly. Recombinant polypeptides (e.g., transaminases and oxidoreductases of the invention) generated from these nucleic acids can be individually isolated or cloned and tested for a desired activity. Any recombinant expression system can be used, including bacterial, mammalian, yeast, insect or plant cell expression systems.
Alternatively, these nucleic acids can be synthesized in vitro by well-known chemical synthesis techniques, as described in, e.g., Adams (1983) J. Am. Chem. Soc. 105:661; Belousov (1997) Nucleic Acids Res. 25:3440-3444; Frenkel (1995) Free Radic. Biol. Med. 19:373-380; Blommers (1994) Biochemistry 33:7886-7896; Narang (1979) Meth. Enzymol. 68:90; Brown (1979) Meth. Enzymol. 68:109; Beaucage (1981) Tetra. Lett. 22:1859; U.S. Pat. No. 4,458,066.
Techniques for the manipulation of nucleic acids, such as, e.g., subcloning, labeling probes (e.g., random-primer labeling using Klenow polymerase, nick translation, amplification), sequencing, hybridization and the like are well described in the scientific and patent literature, see, e.g., Sambrook, ed., MOLECULAR CLONING: A LABORATORY MANUAL (2ND ED.), Vols. 1-3, Cold Spring Harbor Laboratory, (1989); CURRENT PROTOCOLS IN MOLECULAR BIOLOGY, Ausubel, ed. John Wiley & Sons, Inc., New York (1997); LABORATORY TECHNIQUES IN BIOCHEMISTRY AND MOLECULAR BIOLOGY: HYBRIDIZATION WITH NUCLEIC ACID PROBES, Part I. Theory and Nucleic Acid Preparation, Tijssen, ed. Elsevier, N.Y. (1993).
Another useful means of obtaining and manipulating nucleic acids used to practice the methods of the invention is to clone from genomic samples, and, if desired, screen and re-clone inserts isolated or amplified from, e.g., genomic clones or cDNA clones. Sources of nucleic acid used in the methods of the invention include genomic or cDNA libraries contained in, e.g., mammalian artificial chromosomes (MACs), see, e.g., U.S. Pat. Nos. 5,721,118; 6,025,155; human artificial chromosomes, see, e.g., Rosenfeld (1997) Nat. Genet. 15:333-335; yeast artificial chromosomes (YAC); bacterial artificial chromosomes (BAC); P1 artificial chromosomes, see, e.g., Woon (1998) Genomics 50:306-316; P1-derived vectors (PACs), see, e.g., Kern (1997) Biotechniques 23:120-124; cosmids, recombinant viruses, phages or plasmids.
In one aspect, a nucleic acid encoding a polypeptide of the invention is assembled in appropriate phase with a leader sequence capable of directing secretion of the translated polypeptide or fragment thereof.
The invention provides fusion proteins and nucleic acids encoding them. A polypeptide of the invention can be fused to a heterologous peptide or polypeptide, such as N-terminal identification peptides which impart desired characteristics, such as increased stability or simplified purification. Peptides and polypeptides of the invention can also be synthesized and expressed as fusion proteins with one or more additional domains linked thereto for, e.g., producing a more immunogenic peptide, to more readily isolate a recombinantly synthesized peptide, to identify and isolate antibodies and antibody-expressing B cells, and the like. Detection and purification facilitating domains include, e.g., metal chelating peptides such as polyhistidine tracts and histidine-tryptophan modules that allow purification on immobilized metals, protein A domains that allow purification on immobilized immunoglobulin, and the domain utilized in the FLAGS extension/affinity purification system (Immunex Corp, Seattle Wash.). The inclusion of a cleavable linker sequences such as Factor Xa or enterokinase (Invitrogen, San Diego Calif.) between a purification domain and the motif-comprising peptide or polypeptide to facilitate purification. For example, an expression vector can include an epitope-encoding nucleic acid sequence linked to six histidine residues followed by a thioredoxin and an enterokinase cleavage site (see e.g., Williams (1995) Biochemistry 34:1787-1797; Dobeli (1998) Protein Expr. Purif. 12:404-414). The histidine residues facilitate detection and purification while the enterokinase cleavage site provides a means for purifying the epitope from the remainder of the fusion protein. Technology pertaining to vectors encoding fusion proteins and application of fusion proteins are well described in the scientific and patent literature, see e.g., Kroll (1993) DNA Cell. Biol., 12:441-53.
The phrases “nucleic acid” or “nucleic acid sequence” as used herein refer to an oligonucleotide, nucleotide, polynucleotide, or to a fragment of any of these, to DNA or RNA of genomic or synthetic origin which may be single-stranded or double-stranded and may represent a sense or antisense strand, to peptide nucleic acid (PNA), or to any DNA-like or RNA-like material, natural or synthetic in origin. The phrases “nucleic acid” or “nucleic acid sequence” includes oligonucleotide, nucleotide, polynucleotide, or to a fragment of any of these, to DNA or RNA (e.g., mRNA, rRNA, tRNA, iRNA) of genomic or synthetic origin which may be single-stranded or double-stranded and may represent a sense or antisense strand, to peptide nucleic acid (PNA), or to any DNA-like or RNA-like material, natural or synthetic in origin, including, e.g., iRNA, ribonucleoproteins (e.g., e.g., double stranded iRNAs, e.g., iRNPs). The term encompasses nucleic acids, i.e., oligonucleotides, containing known analogues of natural nucleotides. The term also encompasses nucleic-acid-like structures with synthetic backbones, see e.g., Mata (1997) Toxicol. Appl. Pharmacol. 144:189-197; Strauss-Soukup (1997) Biochemistry 36:8692-8698; Samstag (1996) Antisense Nucleic Acid Drug Dev 6:153-156. “Oligonucleotide” includes either a single stranded polydeoxynucleotide or two complementary polydeoxynucleotide strands that may be chemically synthesized. Such synthetic oligonucleotides have no 5′ phosphate and thus will not ligate to another oligonucleotide without adding a phosphate with an ATP in the presence of a kinase. A synthetic oligonucleotide can ligate to a fragment that has not been dephosphorylated.
A “coding sequence of” or a “nucleotide sequence encoding” a particular polypeptide or protein, is a nucleic acid sequence which is transcribed and translated into a polypeptide or protein when placed under the control of appropriate regulatory sequences.
In one aspect, the term “gene” means the segment of DNA involved in producing a polypeptide chain; it includes regions preceding and following the coding region (leader and trailer) as well as, where applicable, intervening sequences (introns) between individual coding segments (exons). In one aspect, “operably linked” as used herein refers to a functional relationship between two or more nucleic acid (e.g., DNA) segments. In one aspect, it refers to the functional relationship of transcriptional regulatory sequence to a transcribed sequence. For example, a promoter is operably linked to a coding sequence, such as a nucleic acid of the invention, if it stimulates or modulates the transcription of the coding sequence in an appropriate host cell or other expression system. In one aspect, promoter transcriptional regulatory sequences are operably linked to a transcribed sequence and are physically contiguous to the transcribed sequence, i.e., they are cis-acting. In one aspect transcriptional regulatory sequences, such as enhancers, can be physically contiguous or located in close proximity to the coding sequences whose transcription they enhance.
In one aspect the term “expression cassette” refers to a nucleotide sequence which is capable of affecting expression of a structural gene (i.e., a protein coding sequence, such as a transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase of the invention) in a host compatible with such sequences. Expression cassettes include at least a promoter operably linked with the polypeptide coding sequence; and, in one aspect, with other sequences, e.g., transcription termination signals. Additional factors necessary or helpful in effecting expression may also be used, e.g., enhancers. Thus, expression cassettes also include plasmids, expression vectors, recombinant viruses, any form of recombinant “naked DNA” vector, and the like. In one aspect, a “vector” comprises a nucleic acid that can infect, transfect, transiently or permanently transduce a cell. In alternative aspects a vector can be a naked nucleic acid, or a nucleic acid complexed with protein or lipid. The vector in one aspect comprises viral or bacterial nucleic acids and/or proteins, and/or membranes (e.g., a cell membrane, a viral lipid envelope, etc.). Vectors include, but are not limited to replicons (e.g., RNA replicons, bacteriophages) to which fragments of DNA may be attached and become replicated. Vectors thus include, but are not limited to RNA, autonomous self-replicating circular or linear DNA or RNA (e.g., plasmids, viruses, and the like, see, e.g., U.S. Pat. No. 5,217,879), and include both the expression and non-expression plasmids. Where a recombinant microorganism or cell culture is described as hosting an “expression vector” this includes both extra-chromosomal circular and linear DNA and DNA that has been incorporated into the host chromosome(s). Where a vector is being maintained by a host cell, the vector may either be stably replicated by the cells during mitosis as an autonomous structure, or is incorporated within the host's genome.
In one aspect, the term “promoter” includes all sequences capable of driving transcription of a coding sequence in a cell, e.g., a plant cell. Thus, promoters used in the constructs of the invention include cis-acting transcriptional control elements and regulatory sequences that are involved in regulating or modulating the timing and/or rate of transcription of a gene. For example, a promoter can be a cis-acting transcriptional control element, including an enhancer, a promoter, a transcription terminator, an origin of replication, a chromosomal integration sequence, 5′ and 3′ untranslated regions, or an intronic sequence, which are involved in transcriptional regulation. These cis-acting sequences typically interact with proteins or other biomolecules to carry out (turn on/off, regulate, modulate, etc.) transcription. “Constitutive” promoters are those that drive expression continuously under most environmental conditions and states of development or cell differentiation. “Inducible” or “regulatable” promoters direct expression of the nucleic acid of the invention under the influence of environmental conditions or developmental conditions. Examples of environmental conditions that may affect transcription by inducible promoters include anaerobic conditions, elevated temperature, drought, or the presence of light.
In alternative embodiments, “tissue-specific” promoters are transcriptional control elements that are only active in particular cells or tissues or organs, e.g., in plants or animals. Tissue-specific regulation may be achieved by certain intrinsic factors that ensure that genes encoding proteins specific to a given tissue are expressed. Such factors are known to exist in mammals and plants so as to allow for specific tissues to develop.
In alternative embodiments, the term “isolated” means that the material (e.g., a nucleic acid, a polypeptide, a cell) is removed from its original environment (e.g., the natural environment if it is naturally occurring). For example, a naturally-occurring polynucleotide or polypeptide present in a living animal is not isolated, but the same polynucleotide or polypeptide, separated from some or all of the coexisting materials in the natural system, is isolated. Such polynucleotides could be part of a vector and/or such polynucleotides or polypeptides could be part of a composition and still be isolated in that such vector or composition is not part of its natural environment. In alternative embodiments, the term “purified” does not require absolute purity; rather, it is intended as a relative definition. Individual nucleic acids obtained from a library have been conventionally purified to electrophoretic homogeneity. The sequences obtained from these clones could not be obtained directly either from the library or from total human DNA. The purified nucleic acids of the invention have been purified from the remainder of the genomic DNA in the organism by at least 104-106 fold. However, the term “purified” also includes nucleic acids that have been purified from the remainder of the genomic DNA or from other sequences in a library or other environment by at least one order of magnitude, typically two or three orders and more typically four or five orders of magnitude.
In alternative embodiments, the term “recombinant” means that the nucleic acid is adjacent to a “backbone” nucleic acid to which it is not adjacent in its natural environment. In alternative embodiments, to be “enriched” the nucleic acids will represent 5% or more of the number of nucleic acid inserts in a population of nucleic acid backbone molecules. Backbone molecules according to the invention include nucleic acids such as expression vectors, self-replicating nucleic acids, viruses, integrating nucleic acids and other vectors or nucleic acids used to maintain or manipulate a nucleic acid insert of interest. In alternative embodiments, the enriched nucleic acids represent 15% or more of the number of nucleic acid inserts in the population of recombinant backbone molecules. In alternative embodiments, the enriched nucleic acids represent 50% or more of the number of nucleic acid inserts in the population of recombinant backbone molecules. In a one aspect, the enriched nucleic acids represent 90% or more of the number of nucleic acid inserts in the population of recombinant backbone molecules.
“Plasmids” are designated by a lower case “p” preceded and/or followed by capital letters and/or numbers. The starting plasmids herein are either commercially available, publicly available on an unrestricted basis, or can be constructed from available plasmids in accord with published procedures. In addition, equivalent plasmids to those described herein are known in the art and will be apparent to the ordinarily skilled artisan. “Plasmids” can be commercially available, publicly available on an unrestricted basis, or can be constructed from available plasmids in accord with published procedures. Equivalent plasmids to those described herein are known in the art and will be apparent to the ordinarily skilled artisan.
In alternative embodiments, “digestion” of DNA refers to catalytic cleavage of the DNA with a restriction enzyme that acts only at certain sequences in the DNA. The various restriction enzymes used herein are commercially available and their reaction conditions, cofactors and other requirements were used as would be known to the ordinarily skilled artisan. For analytical purposes, typically 1 g of plasmid or DNA fragment is used with about 2 units of enzyme in about 20 l of buffer solution. For the purpose of isolating DNA fragments for plasmid construction, typically 5 to 50 g of DNA are digested with 20 to 250 units of enzyme in a larger volume. Appropriate buffers and substrate amounts for particular restriction enzymes are specified by the manufacturer. Incubation times of about 1 hour at 37 C are ordinarily used, but may vary in accordance with the supplier's instructions. After digestion, gel electrophoresis may be performed to isolate the desired fragment.
In alternative embodiments, “hybridization” refers to the process by which a nucleic acid strand joins with a complementary strand through base pairing. Hybridization reactions can be sensitive and selective so that a particular sequence of interest can be identified even in samples in which it is present at low concentrations. Suitably stringent conditions can be defined by, for example, the concentrations of salt or formamide in the prehybridization and hybridization solutions, or by the hybridization temperature and are well known in the art. In alternative embodiments stringency can be increased by reducing the concentration of salt, increasing the concentration of formamide, or raising the hybridization temperature. In alternative aspects, nucleic acids of the invention are defined by their ability to hybridize under various stringency conditions (e.g., high, medium, and low), as set forth herein.
For example, hybridization under high stringency conditions could occur in about 50% formamide at about 37° C. to 42° C. Hybridization could occur under reduced stringency conditions in about 35% to 25% formamide at about 30° C. to 35° C. In particular, hybridization could occur under high stringency conditions at 42° C. in 50% formamide, 5×SSPE, 0.3% SDS and 200 ug/ml sheared and denatured salmon sperm DNA. Hybridization could occur under reduced stringency conditions as described above, but in 35% formamide at a reduced temperature of 35° C. The temperature range corresponding to a particular level of stringency can be further narrowed by calculating the purine to pyrimidine ratio of the nucleic acid of interest and adjusting the temperature accordingly. Variations on the above ranges and conditions are well known in the art.
Transcriptional and Translational Control Sequences
The invention provides nucleic acid (e.g., DNA) sequences of the invention operatively linked to expression (e.g., transcriptional or translational) control sequence(s), e.g., promoters or enhancers, to direct or modulate RNA synthesis/expression. The expression control sequence can be in an expression vector. Exemplary bacterial promoters include lacI, lacZ, T3, T7, gpt, lambda PR, PL and trp. Exemplary eukaryotic promoters include CMV immediate early, HSV thymidine kinase, early and late SV40, LTRs from retrovirus, and mouse metallothionein I. A promoter sequence is “operably linked to” a coding sequence when RNA polymerase which initiates transcription at the promoter will transcribe the coding sequence into mRNA.
Promoters suitable for expressing a polypeptide in bacteria include the E. coli lac or trp promoters, the lad promoter, the lacZ promoter, the T3 promoter, the T7 promoter, the gpt promoter, the lambda PR promoter, the lambda PL promoter, promoters from operons encoding glycolytic enzymes such as 3-phosphoglycerate kinase (PGK), and the acid phosphatase promoter. Eukaryotic promoters include the CMV immediate early promoter, the HSV thymidine kinase promoter, heat shock promoters, the early and late SV40 promoter, LTRs from retroviruses, and the mouse metallothionein-I promoter. Other promoters known to control expression of genes in prokaryotic or eukaryotic cells or their viruses may also be used. Promoters suitable for expressing the polypeptide or fragment thereof in bacteria include the E. coli lac or trp promoters, the lacI promoter, the lacZ promoter, the T3 promoter, the T7 promoter, the gpt promoter, the lambda PR promoter, the lambda PL promoter, promoters from operons encoding glycolytic enzymes such as 3-phosphoglycerate kinase (PGK) and the acid phosphatase promoter. Fungal promoters include the ∀ factor promoter. Eukaryotic promoters include the CMV immediate early promoter, the HSV thymidine kinase promoter, heat shock promoters, the early and late SV40 promoter, LTRs from retroviruses and the mouse metallothionein-I promoter. Other promoters known to control expression of genes in prokaryotic or eukaryotic cells or their viruses may also be used.
Tissue-Specific Plant Promoters
The invention provides expression cassettes that can be expressed in a tissue-specific manner, e.g., that can express a transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase of the invention in a tissue-specific manner. The invention also provides plants or seeds that express a transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase of the invention in a tissue-specific manner. The tissue-specificity can be seed specific, stem specific, leaf specific, root specific, fruit specific and the like.
In one aspect, a constitutive promoter such as the CaMV 35S promoter can be used for expression in specific parts of the plant or seed or throughout the plant. For example, for overexpression, a plant promoter fragment can be employed which will direct expression of a nucleic acid in some or all tissues of a plant, e.g., a regenerated plant. Such promoters are referred to herein as “constitutive” promoters and are active under most environmental conditions and states of development or cell differentiation. Examples of constitutive promoters include the cauliflower mosaic virus (CaMV) 35S transcription initiation region, the 1′- or 2′-promoter derived from T-DNA of Agrobacterium tumefaciens, and other transcription initiation regions from various plant genes known to those of skill. Such genes include, e.g., ACT11 from Arabidopsis (Huang (1996) Plant Mol. Biol. 33:125-139); Cat3 from Arabidopsis (GenBank No. U43147, Zhong (1996) Mol. Gen. Genet. 251:196-203); the gene encoding stearoyl-acyl carrier protein desaturase from Brassica napus (Genbank No. X74782, Solocombe (1994) Plant Physiol. 104:1167-1176); GPc1 from maize (GenBank No. X15596; Martinez (1989) J. Mol. Biol 208:551-565); the Gpc2 from maize (GenBank No. U45855, Manjunath (1997) Plant Mol. Biol. 33:97-112); plant promoters described in U.S. Pat. Nos. 4,962,028; 5,633,440.
The invention uses tissue-specific or constitutive promoters derived from viruses which can include, e.g., the tobamovirus subgenomic promoter (Kumagai (1995) Proc. Natl. Acad. Sci. USA 92:1679-1683; the rice tungro bacilliform virus (RTBV), which replicates only in phloem cells in infected rice plants, with its promoter which drives strong phloem-specific reporter gene expression; the cassava vein mosaic virus (CVMV) promoter, with highest activity in vascular elements, in leaf mesophyll cells, and in root tips (Verdaguer (1996) Plant Mol. Biol. 31:1129-1139).
Alternatively, the plant promoter may direct expression of transferase-, e.g., transaminase-, e.g., d-amino-acid transferase-, and/or oxidoreductase-, e.g., dehydrogenase-, e.g., d-amino-acid dehydrogenase-expressing nucleic acid in a specific tissue, organ or cell type (i.e. tissue-specific promoters) or may be otherwise under more precise environmental or developmental control or under the control of an inducible promoter. Examples of environmental conditions that may affect transcription include anaerobic conditions, elevated temperature, the presence of light, or sprayed with chemicals/hormones. For example, the invention incorporates the drought-inducible promoter of maize (Busk (1997) supra); the cold, drought, and high salt inducible promoter from potato (Kirch (1997) Plant Mol. Biol. 33:897 909).
Tissue-specific promoters can promote transcription only within a certain time frame of developmental stage within that tissue. See, e.g., Blazquez (1998) Plant Cell 10:791-800, characterizing the Arabidopsis LEAFY gene promoter. See also Cardon (1997) Plant J 12:367-77, describing the transcription factor SPL3, which recognizes a conserved sequence motif in the promoter region of the A. thaliana floral meristem identity gene AP1; and Mandel (1995) Plant Molecular Biology, Vol. 29, pp 995-1004, describing the meristem promoter eIF4. Tissue specific promoters which are active throughout the life cycle of a particular tissue can be used. In one aspect, the nucleic acids of the invention are operably linked to a promoter active primarily only in cotton fiber cells. In one aspect, the nucleic acids of the invention are operably linked to a promoter active primarily during the stages of cotton fiber cell elongation, e.g., as described by Rinehart (1996) supra. The nucleic acids can be operably linked to the Fbl2A gene promoter to be preferentially expressed in cotton fiber cells (Ibid). See also, John (1997) Proc. Natl. Acad. Sci. USA 89:5769-5773; John, et al., U.S. Pat. Nos. 5,608,148 and 5,602,321, describing cotton fiber-specific promoters and methods for the construction of transgenic cotton plants. Root-specific promoters may also be used to express the nucleic acids of the invention. Examples of root-specific promoters include the promoter from the alcohol dehydrogenase gene (DeLisle (1990) Int. Rev. Cytol. 123:39-60). Other promoters that can be used to express the nucleic acids of the invention include, e.g., ovule-specific, embryo-specific, endosperm-specific, integument-specific, seed coat-specific promoters, or some combination thereof; a leaf-specific promoter (see, e.g., Busk (1997) Plant J. 11:1285 1295, describing a leaf-specific promoter in maize); the ORF13 promoter from Agrobacterium rhizogenes (which exhibits high activity in roots, see, e.g., Hansen (1997) supra); a maize pollen specific promoter (see, e.g., Guerrero (1990) Mol. Gen. Genet. 224:161 168); a tomato promoter active during fruit ripening, senescence and abscission of leaves and, to a lesser extent, of flowers can be used (see, e.g., Blume (1997) Plant J. 12:731 746); a pistil-specific promoter from the potato SK2 gene (see, e.g., Ficker (1997) Plant Mol. Biol. 35:425 431); the Blec4 gene from pea, which is active in epidermal tissue of vegetative and floral shoot apices of transgenic alfalfa making it a useful tool to target the expression of foreign genes to the epidermal layer of actively growing shoots or fibers; the ovule-specific BEL1 gene (see, e.g., Reiser (1995) Cell 83:735-742, GenBank No. U39944); and/or, the promoter in Klee, U.S. Pat. No. 5,589,583, describing a plant promoter region is capable of conferring high levels of transcription in meristematic tissue and/or rapidly dividing cells.
Alternatively, plant promoters which are inducible upon exposure to plant hormones, such as auxins, are used to express the nucleic acids of the invention. For example, the invention can use the auxin-response elements E1 promoter fragment (AuxREs) in the soybean (Glycine max L.) (Liu (1997) Plant Physiol. 115:397-407); the auxin-responsive Arabidopsis GST6 promoter (also responsive to salicylic acid and hydrogen peroxide) (Chen (1996) Plant J. 10: 955-966); the auxin-inducible parC promoter from tobacco (Sakai (1996) 37:906-913); a plant biotin response element (Streit (1997) Mol. Plant Microbe Interact. 10:933-937); and, the promoter responsive to the stress hormone abscisic acid (Sheen (1996) Science 274:1900-1902).
The nucleic acids of the invention can also be operably linked to plant promoters which are inducible upon exposure to chemicals reagents which can be applied to the plant, such as herbicides or antibiotics. For example, the maize In2-2 promoter, activated by benzenesulfonamide herbicide safeners, can be used (De Veylder (1997) Plant Cell Physiol. 38:568-577); application of different herbicide safeners induces distinct gene expression patterns, including expression in the root, hydathodes, and the shoot apical meristem. Coding sequence can be under the control of, e.g., a tetracycline-inducible promoter, e.g., as described with transgenic tobacco plants containing the Avena sativa L. (oat) arginine decarboxylase gene (Masgrau (1997) Plant J. 11:465-473); or, a salicylic acid-responsive element (Stange (1997) Plant J. 11:1315-1324). Using chemically- (e.g., hormone- or pesticide-) induced promoters, i.e., promoter responsive to a chemical which can be applied to the transgenic plant in the field, expression of a polypeptide of the invention can be induced at a particular stage of development of the plant. Thus, the invention also provides for transgenic plants containing an inducible gene encoding for polypeptides of the invention whose host range is limited to target plant species, such as corn, rice, barley, wheat, potato or other crops, inducible at any stage of development of the crop.
One of skill will recognize that a tissue-specific plant promoter may drive expression of operably linked sequences in tissues other than the target tissue. Thus, a tissue-specific promoter is one that drives expression preferentially in the target tissue or cell type, but may also lead to some expression in other tissues as well.
The nucleic acids of the invention can also be operably linked to plant promoters which are inducible upon exposure to chemicals reagents. These reagents include, e.g., herbicides, synthetic auxins, or antibiotics which can be applied, e.g., sprayed, onto transgenic plants. Inducible expression of the transferase-, e.g., transaminase-, e.g., d-amino-acid transferase-, and/or oxidoreductase-, e.g., dehydrogenase-, e.g., d-amino-acid dehydrogenase-producing nucleic acids of the invention will allow the grower to select plants with the optimal transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase expression and/or activity. The development of plant parts can thus controlled. In this way the invention provides the means to facilitate the harvesting of plants and plant parts. For example, in various embodiments, the maize In2-2 promoter, activated by benzenesulfonamide herbicide safeners, is used (De Veylder (1997) Plant Cell Physiol. 38:568-577); application of different herbicide safeners induces distinct gene expression patterns, including expression in the root, hydathodes, and the shoot apical meristem. Coding sequences of the invention are also under the control of a tetracycline-inducible promoter, e.g., as described with transgenic tobacco plants containing the Avena sativa L. (oat) arginine decarboxylase gene (Masgrau (1997) Plant J. 11:465-473); or, a salicylic acid-responsive element (Stange (1997) Plant J. 11:1315-1324).
In some aspects, proper polypeptide expression may require polyadenylation region at the 3′-end of the coding region. The polyadenylation region can be derived from the natural gene, from a variety of other plant (or animal or other) genes, or from genes in the Agrobacterial T-DNA.
The term “plant” (e.g., as in a transgenic plant or plant seed of this invention, or plant promoter used in a vector of the invention) includes whole plants, plant parts (e.g., leaves, stems, flowers, roots, etc.), plant protoplasts, seeds and plant cells and progeny of same; the classes of plants that can be used to practice this invention (including compositions and methods) can be as broad as the class of higher plants, including plants amenable to transformation techniques, including angiosperms (monocotyledonous and dicotyledonous plants), as well as gymnosperms; also including plants of a variety of ploidy levels, including polyploid, diploid, haploid and hemizygous states. As used herein, the term “transgenic plant” includes plants or plant cells into which a heterologous nucleic acid sequence has been inserted, e.g., the nucleic acids and various recombinant constructs (e.g., expression cassettes, such a vectors) of the invention. Transgenic plants of the invention are also discussed, below.
Expression Vectors and Cloning Vehicles
The invention provides expression vectors and cloning vehicles comprising nucleic acids of the invention, e.g., sequences encoding the transferases, e.g., transaminases, e.g., d-amino-acid transferases, and/or oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases of the invention. Expression vectors and cloning vehicles of the invention can comprise viral particles, baculovirus, phage, plasmids, phagemids, cosmids, fosmids, bacterial artificial chromosomes, viral DNA (e.g., vaccinia, adenovirus, foul pox virus, pseudorabies and derivatives of SV40), P1-based artificial chromosomes, yeast plasmids, yeast artificial chromosomes, and any other vectors specific for specific hosts of interest (such as bacillus, Aspergillus and yeast). Vectors of the invention can include chromosomal, non-chromosomal and synthetic DNA sequences. Large numbers of suitable vectors are known to those of skill in the art, and are commercially available. Exemplary vectors are include: bacterial: pQE vectors (Qiagen), pBluescript plasmids, pNH vectors, (lambda-ZAP vectors (Stratagene); ptrc99a, pKK223-3, pDR540, pRIT2T (Pharmacia); Eukaryotic: pXT1, pSG5 (Stratagene), pSVK3, pBPV, pMSG, pSVLSV40 (Pharmacia). However, any other plasmid or other vector may be used so long as they are replicable and viable in the host. Low copy number or high copy number vectors may be employed with the present invention.
The expression vector can comprise a promoter, a ribosome binding site for translation initiation and a transcription terminator. The vector may also include appropriate sequences for amplifying expression. Mammalian expression vectors can comprise an origin of replication, any necessary ribosome binding sites, a polyadenylation site, splice donor and acceptor sites, transcriptional termination sequences, and 5′ flanking non-transcribed sequences. In some aspects, DNA sequences derived from the SV40 splice and polyadenylation sites may be used to provide the required non-transcribed genetic elements.
In one aspect, the expression vectors contain one or more selectable marker genes to permit selection of host cells containing the vector. Such selectable markers include genes encoding dihydrofolate reductase or genes conferring neomycin resistance for eukaryotic cell culture, genes conferring tetracycline or ampicillin resistance in E. coli, and the S. cerevisiae TRP1 gene. Promoter regions can be selected from any desired gene using chloramphenicol transferase (CAT) vectors or other vectors with selectable markers.
Vectors for expressing the polypeptide or fragment thereof in eukaryotic cells can also contain enhancers to increase expression levels. Enhancers are cis-acting elements of DNA, usually from about 10 to about 300 bp in length that act on a promoter to increase its transcription. Examples include the SV40 enhancer on the late side of the replication origin by 100 to 270, the cytomegalovirus early promoter enhancer, the polyoma enhancer on the late side of the replication origin, and the adenovirus enhancers.
A nucleic acid sequence can be inserted into a vector by a variety of procedures. In general, the sequence is ligated to the desired position in the vector following digestion of the insert and the vector with appropriate restriction endonucleases. Alternatively, blunt ends in both the insert and the vector may be ligated. A variety of cloning techniques are known in the art, e.g., as described in Ausubel and Sambrook. Such procedures and others are deemed to be within the scope of those skilled in the art.
The vector can be in the form of a plasmid, a viral particle, or a phage. Other vectors include chromosomal, non-chromosomal and synthetic DNA sequences, derivatives of SV40; bacterial plasmids, phage DNA, baculovirus, yeast plasmids, vectors derived from combinations of plasmids and phage DNA, viral DNA such as vaccinia, adenovirus, fowl pox virus, and pseudorabies. A variety of cloning and expression vectors for use with prokaryotic and eukaryotic hosts are described by, e.g., Sambrook.
Particular bacterial vectors which can be used include the commercially available plasmids comprising genetic elements of the well known cloning vector pBR322 (ATCC 37017), pKK223-3 (Pharmacia Fine Chemicals, Uppsala, Sweden), GEM1 (Promega Biotec, Madison, Wis., USA) pQE70, pQE60, pQE-9 (Qiagen), pD10, psiX174 pBluescript II KS, pNH8A, pNH16a, pNH18A, pNH46A (Stratagene), ptrc99a, pKK223-3, pKK233-3, DR540, pRIT5 (Pharmacia), pKK232-8 and pCM7. Particular eukaryotic vectors include pSV2CAT, pOG44, pXT1, pSG (Stratagene) pSVK3, pBPV, pMSG, and pSVL (Pharmacia). However, any other vector may be used as long as it is replicable and viable in the host cell.
The nucleic acids of the invention can be expressed in expression cassettes, vectors or viruses and transiently or stably expressed in plant cells and seeds. One exemplary transient expression system uses episomal expression systems, e.g., cauliflower mosaic virus (CaMV) viral RNA generated in the nucleus by transcription of an episomal mini-chromosome containing supercoiled DNA, see, e.g., Covey (1990) Proc. Natl. Acad. Sci. USA 87:1633-1637. Alternatively, coding sequences, i.e., all or sub-fragments of sequences of the invention can be inserted into a plant host cell genome becoming an integral part of the host chromosomal DNA. Sense or antisense transcripts can be expressed in this manner. A vector comprising the sequences (e.g., promoters or coding regions) from nucleic acids of the invention can comprise a marker gene that confers a selectable phenotype on a plant cell or a seed. For example, the marker may encode biocide resistance, particularly antibiotic resistance, such as resistance to kanamycin, G418, bleomycin, hygromycin, or herbicide resistance, such as resistance to chlorosulfuron or Basta.
Expression vectors capable of expressing nucleic acids and proteins in plants are well known in the art, and can include, e.g., vectors from Agrobacterium spp., potato virus X (see, e.g., Angell (1997) EMBO J. 16:3675-3684), tobacco mosaic virus (see, e.g., Casper (1996) Gene 173:69-73), tomato bushy stunt virus (see, e g, Hillman (1989) Virology 169:42-50), tobacco etch virus (see, e.g., Dolja (1997) Virology 234:243-252), bean golden mosaic virus (see, e.g., Morinaga (1993) Microbiol Immunol. 37:471-476), cauliflower mosaic virus (see, e.g., Cecchini (1997) Mol. Plant Microbe Interact. 10:1094-1101), maize Ac/Ds transposable element (see, e.g., Rubin (1997) Mol. Cell. Biol. 17:6294-6302; Kunze (1996) Curr. Top. Microbiol. Immunol. 204:161-194), and the maize suppressor-mutator (Spm) transposable element (see, e.g., Schlappi (1996) Plant Mol. Biol. 32:717-725); and derivatives thereof.
In one aspect, the expression vector can have two replication systems to allow it to be maintained in two organisms, for example in mammalian or insect cells for expression and in a prokaryotic host for cloning and amplification. Furthermore, for integrating expression vectors, the expression vector can contain at least one sequence homologous to the host cell genome. It can contain two homologous sequences which flank the expression construct. The integrating vector can be directed to a specific locus in the host cell by selecting the appropriate homologous sequence for inclusion in the vector. Constructs for integrating vectors are well known in the art.
Expression vectors of the invention may also include a selectable marker gene to allow for the selection of bacterial strains that have been transformed, e.g., genes which render the bacteria resistant to drugs such as ampicillin, chloramphenicol, erythromycin, kanamycin, neomycin and tetracycline. Selectable markers can also include biosynthetic genes, such as those in the histidine, tryptophan and leucine biosynthetic pathways.
The DNA sequence in the expression vector is operatively linked to an appropriate expression control sequence(s) (promoter) to direct RNA synthesis. Particular named bacterial promoters include lacI, lacZ, T3, T7, gpt, lambda PR, PL and trp. Eukaryotic promoters include CMV immediate early, HSV thymidine kinase, early and late SV40, LTRs from retrovirus and mouse metallothionein-I. Selection of the appropriate vector and promoter is well within the level of ordinary skill in the art. The expression vector also contains a ribosome binding site for translation initiation and a transcription terminator. The vector may also include appropriate sequences for amplifying expression. Promoter regions can be selected from any desired gene using chloramphenicol transferase (CAT) vectors or other vectors with selectable markers. In addition, the expression vectors preferably contain one or more selectable marker genes to provide a phenotypic trait for selection of transformed host cells such as dihydrofolate reductase or neomycin resistance for eukaryotic cell culture, or such as tetracycline or ampicillin resistance in E. coli. 
Mammalian expression vectors may also comprise an origin of replication, any necessary ribosome binding sites, a polyadenylation site, splice donor and acceptor sites, transcriptional termination sequences and 5′ flanking nontranscribed sequences. In some aspects, DNA sequences derived from the SV40 splice and polyadenylation sites may be used to provide the required nontranscribed genetic elements.
Vectors for expressing the polypeptide or fragment thereof in eukaryotic cells may also contain enhancers to increase expression levels. Enhancers are cis-acting elements of DNA, usually from about 10 to about 300 bp in length that act on a promoter to increase its transcription. Examples include the SV40 enhancer on the late side of the replication origin by 100 to 270, the cytomegalovirus early promoter enhancer, the polyoma enhancer on the late side of the replication origin and the adenovirus enhancers.
In addition, the expression vectors typically contain one or more selectable marker genes to permit selection of host cells containing the vector. Such selectable markers include genes encoding dihydrofolate reductase or genes conferring neomycin resistance for eukaryotic cell culture, genes conferring tetracycline or ampicillin resistance in E. coli and the S. cerevisiae TRP1 gene.
In some aspects, the nucleic acid encoding one of the polypeptides of the invention and sequences substantially identical thereto, or fragments comprising at least about 5, 10, 15, 20, 25, 30, 35, 40, 50, 75, 100, or 150 consecutive amino acids thereof is assembled in appropriate phase with a leader sequence capable of directing secretion of the translated polypeptide or fragment thereof. The nucleic acid can encode a fusion polypeptide in which one of the polypeptides of the invention and sequences substantially identical thereto, or fragments comprising at least 5, 10, 15, 20, 25, 30, 35, 40, 50, 75, 100, or 150 consecutive amino acids thereof is fused to heterologous peptides or polypeptides, such as N-terminal identification peptides which impart desired characteristics, such as increased stability or simplified purification.
The appropriate DNA sequence may be inserted into the vector by a variety of procedures. In general, the DNA sequence is ligated to the desired position in the vector following digestion of the insert and the vector with appropriate restriction endonucleases. Alternatively, blunt ends in both the insert and the vector may be ligated. A variety of cloning techniques are disclosed in Ausubel et al. Current Protocols in Molecular Biology, John Wiley 503 Sons, Inc. 1997 and Sambrook et al., Molecular Cloning: A Laboratory Manual 2nd Ed., Cold Spring Harbor Laboratory Press (1989. Such procedures and others are deemed to be within the scope of those skilled in the art.
The vector may be, for example, in the form of a plasmid, a viral particle, or a phage. Other vectors include chromosomal, nonchromosomal and synthetic DNA sequences, derivatives of SV40; bacterial plasmids, phage DNA, baculovirus, yeast plasmids, vectors derived from combinations of plasmids and phage DNA, viral DNA such as vaccinia, adenovirus, fowl pox virus and pseudorabies. A variety of cloning and expression vectors for use with prokaryotic and eukaryotic hosts are described by Sambrook, et al., Molecular Cloning: A Laboratory Manual, 2nd Ed., Cold Spring Harbor, N.Y., (1989).
Host Cells and Transformed Cells
The invention also provides transformed cells comprising a nucleic acid sequence of the invention, e.g., a sequence encoding a transferase, e.g., a transaminase, e.g., a d-amino-acid transferase, and/or an oxidoreductase, e.g., a dehydrogenase, e.g., a d-amino-acid dehydrogenase of the invention, or a vector of the invention. The host cell may be any of the host cells familiar to those skilled in the art, including prokaryotic cells, eukaryotic cells, such as bacterial cells, fungal cells, yeast cells, mammalian cells, insect cells, or plant cells. Exemplary bacterial cells include any species within the genera Escherichia, Bacillus, Streptomyces, Salmonella, Pseudomonas and Staphylococcus, including, e.g., Escherichia coli, Lactococcus lactis, Bacillus subtilis, Bacillus cereus, Salmonella typhimurium, Pseudomonas fluorescens. Exemplary fungal cells include any species of Aspergillus. Exemplary yeast cells include any species of Pichia, Saccharomyces, Schizosaccharomyces, or Schwanniomyces, including Pichia pastoris, Saccharomyces cerevisiae, or Schizosaccharomyces pombe. Exemplary insect cells include any species of Spodoptera or Drosophila, including Drosophila S2 and Spodoptera Sf9. Exemplary animal cells include CHO, COS or Bowes melanoma or any mouse or human cell line. The selection of an appropriate host is within the abilities of those skilled in the art. Techniques for transforming a wide variety of higher plant species are well known and described in the technical and scientific literature. See, e.g., Weising (1988) Ann. Rev. Genet. 22:421-477; U.S. Pat. No. 5,750,870.
The vector can be introduced into the host cells using any of a variety of techniques, including transformation, transfection, transduction, viral infection, gene guns, or Ti-mediated gene transfer. Particular methods include calcium phosphate transfection, DEAE-Dextran mediated transfection, lipofection, or electroporation (Davis, L., Dibner, M., Battey, I., Basic Methods in Molecular Biology, (1986)).
In one aspect, the nucleic acids or vectors of the invention are introduced into the cells for screening, thus, the nucleic acids enter the cells in a manner suitable for subsequent expression of the nucleic acid. The method of introduction is largely dictated by the targeted cell type. Exemplary methods include CaPO4 precipitation, liposome fusion, lipofection (e.g., LIPOFECTINTM), electroporation, viral infection, etc. The candidate nucleic acids may stably integrate into the genome of the host cell (for example, with retroviral introduction) or may exist either transiently or stably in the cytoplasm (i.e. through the use of traditional plasmids, utilizing standard regulatory sequences, selection markers, etc.). As many pharmaceutically important screens require human or model mammalian cell targets, retroviral vectors capable of transfecting such targets are can be used.
Where appropriate, the engineered host cells can be cultured in conventional nutrient media modified as appropriate for activating promoters, selecting transformants or amplifying the genes of the invention. Following transformation of a suitable host strain and growth of the host strain to an appropriate cell density, the selected promoter may be induced by appropriate means (e.g., temperature shift or chemical induction) and the cells may be cultured for an additional period to allow them to produce the desired polypeptide or fragment thereof.
Cells can be harvested by centrifugation, disrupted by physical or chemical means, and the resulting crude extract is retained for further purification. Microbial cells employed for expression of proteins can be disrupted by any convenient method, including freeze-thaw cycling, sonication, mechanical disruption, or use of cell lysing agents. Such methods are well known to those skilled in the art. The expressed polypeptide or fragment thereof can be recovered and purified from recombinant cell cultures by methods including ammonium sulfate or ethanol precipitation, acid extraction, anion or cation exchange chromatography, phosphocellulose chromatography, hydrophobic interaction chromatography, affinity chromatography, hydroxylapatite chromatography and lectin chromatography. Protein refolding steps can be used, as necessary, in completing configuration of the polypeptide. If desired, high performance liquid chromatography (HPLC) can be employed for final purification steps.
The constructs in host cells can be used in a conventional manner to produce the gene product encoded by the recombinant sequence. Depending upon the host employed in a recombinant production procedure, the polypeptides produced by host cells containing the vector may be glycosylated or may be non-glycosylated. Polypeptides of the invention may or may not also include an initial methionine amino acid residue.
Cell-free translation systems can also be employed to produce a polypeptide of the invention. Cell-free translation systems can use mRNAs transcribed from a DNA construct comprising a promoter operably linked to a nucleic acid encoding the polypeptide or fragment thereof. In some aspects, the DNA construct may be linearized prior to conducting an in vitro transcription reaction. The transcribed mRNA is then incubated with an appropriate cell-free translation extract, such as a rabbit reticulocyte extract, to produce the desired polypeptide or fragment thereof.
The expression vectors can contain one or more selectable marker genes to provide a phenotypic trait for selection of transformed host cells such as dihydrofolate reductase or neomycin resistance for eukaryotic cell culture, or such as tetracycline or ampicillin resistance in E. coli. 
Host cells containing the polynucleotides of interest, e.g., nucleic acids of the invention, can be cultured in conventional nutrient media modified as appropriate for activating promoters, selecting transformants or amplifying genes. The culture conditions, such as temperature, pH and the like, are those previously used with the host cell selected for expression and will be apparent to the ordinarily skilled artisan. The clones which are identified as having the specified enzyme activity may then be sequenced to identify the polynucleotide sequence encoding an enzyme having the enhanced activity.
The invention provides a method for overexpressing a recombinant transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase in a cell comprising expressing a vector comprising a nucleic acid of the invention, e.g., a nucleic acid comprising a nucleic acid sequence with at least about 50%, 51%, 52%, 53%, 54%, 55%, 56%, 57%, 58%, 59%, 60%, 61%, 62%, 63%, 64%, 65%, 66%, 67%, 68%, 69%, 70%, 71%, 72%, 73%, 74%, 75%, 76%, 77%, 78%, 79%, 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or more sequence identity to a sequence of the invention over a region of at least about 100 residues, wherein the sequence identities are determined by analysis with a sequence comparison algorithm or by visual inspection, or, a nucleic acid that hybridizes under stringent conditions to a nucleic acid sequence of the invention, or a subsequence thereof. The overexpression can be effected by any means, e.g., use of a high activity promoter, a dicistronic vector or by gene amplification of the vector.
The nucleic acids of the invention can be expressed, or overexpressed, in any in vitro or in vivo expression system. Any cell culture systems can be employed to express, or overexpress, recombinant protein, including bacterial, insect, yeast, fungal or mammalian cultures. Over-expression can be effected by appropriate choice of promoters, enhancers, vectors (e.g., use of replicon vectors, dicistronic vectors (see, e.g., Gurtu (1996) Biochem. Biophys. Res. Commun. 229:295-8), media, culture systems and the like. In one aspect, gene amplification using selection markers, e.g., glutamine synthetase (see, e.g., Sanders (1987) Dev. Biol. Stand. 66:55-63), in cell systems are used to overexpress the polypeptides of the invention.
Additional details regarding this approach are in the public literature and/or are known to the skilled artisan. In a particular non-limiting exemplification, such publicly available literature includes: Journal of Bacteriology. 1998 August. 180(16):4319-4323; Applied Microbiology and Biotechnology. 2003 June. 61(5-6):463-471; Gene. 1996 October 177(1):217-222; J Bacteriol. 1994 June; 176(12): 3552-3558; JBC. 1997 September 272(37):23303-23311, although these references do not teach the inventive enzymes of the instant application.
The host cell may be any of the host cells familiar to those skilled in the art, including prokaryotic cells, eukaryotic cells, mammalian cells, insect cells, or plant cells. As representative examples of appropriate hosts, there may be mentioned: bacterial cells, such as E. coli, Streptomyces, Bacillus subtilis, Bacillus cereus, Salmonella typhimurium and various species within the genera Pseudomonas, Streptomyces and Staphylococcus, fungal cells, such as Aspergillus, yeast such as any species of Pichia, Saccharomyces, Schizosaccharomyces, Schwanniomyces, including Pichia pastoris, Saccharomyces cerevisiae, or Schizosaccharomyces pombe, insect cells such as Drosophila S2 and Spodoptera Sf9, animal cells such as CHO, COS or Bowes melanoma and adenoviruses. The selection of an appropriate host is within the abilities of those skilled in the art.
The vector may be introduced into the host cells using any of a variety of techniques, including transformation, transfection, transduction, viral infection, gene guns, or Ti-mediated gene transfer. Particular methods include calcium phosphate transfection, DEAE-Dextran mediated transfection, lipofection, or electroporation (Davis, L., Dibner, M., Battey, I., Basic Methods in Molecular Biology, (1986)).
Where appropriate, the engineered host cells can be cultured in conventional nutrient media modified as appropriate for activating promoters, selecting transformants or amplifying the genes of the invention. Following transformation of a suitable host strain and growth of the host strain to an appropriate cell density, the selected promoter may be induced by appropriate means (e.g., temperature shift or chemical induction) and the cells may be cultured for an additional period to allow them to produce the desired polypeptide or fragment thereof.
Cells are typically harvested by centrifugation, disrupted by physical or chemical means and the resulting crude extract is retained for further purification. Microbial cells employed for expression of proteins can be disrupted by any convenient method, including freeze-thaw cycling, sonication, mechanical disruption, or use of cell lysing agents. Such methods are well known to those skilled in the art. The expressed polypeptide or fragment thereof can be recovered and purified from recombinant cell cultures by methods including ammonium sulfate or ethanol precipitation, acid extraction, anion or cation exchange chromatography, phosphocellulose chromatography, hydrophobic interaction chromatography, affinity chromatography, hydroxylapatite chromatography and lectin chromatography. Protein refolding steps can be used, as necessary, in completing configuration of the polypeptide. If desired, high performance liquid chromatography (HPLC) can be employed for final purification steps.
Various mammalian cell culture systems can also be employed to express recombinant protein. Examples of mammalian expression systems include the COS-7 lines of monkey kidney fibroblasts (described by Gluzman, Cell, 23:175, 1981) and other cell lines capable of expressing proteins from a compatible vector, such as the C127, 3T3, CHO, HeLa and BHK cell lines.
The constructs in host cells can be used in a conventional manner to produce the gene product encoded by the recombinant sequence. Depending upon the host employed in a recombinant production procedure, the polypeptides produced by host cells containing the vector may be glycosylated or may be non-glycosylated. Polypeptides of the invention may or may not also include an initial methionine amino acid residue.
Alternatively, the polypeptides of amino acid sequences of the invention, or fragments comprising at least 5, 10, 15, 20, 25, 30, 35, 40, 50, 75, 100, or 150 consecutive amino acids thereof can be synthetically produced by conventional peptide synthesizers. In other aspects, fragments or portions of the polypeptides may be employed for producing the corresponding full-length polypeptide by peptide synthesis; therefore, the fragments may be employed as intermediates for producing the full-length polypeptides.
Cell-free translation systems can also be employed to produce one of the polypeptides of amino acid sequences of the invention, or fragments comprising at least 5, 10, 15, 20, 25, 30, 35, 40, 50, 75, 100, or 150 consecutive amino acids thereof using mRNAs transcribed from a DNA construct comprising a promoter operably linked to a nucleic acid encoding the polypeptide or fragment thereof. In some aspects, the DNA construct may be linearized prior to conducting an in vitro transcription reaction. The transcribed mRNA is then incubated with an appropriate cell-free translation extract, such as a rabbit reticulocyte extract, to produce the desired polypeptide or fragment thereof.
Amplification of Nucleic Acids
In practicing the invention, nucleic acids of the invention and nucleic acids encoding the transferases, e.g., transaminases, e.g., d-amino-acid transferases, and/or oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases of the invention, or modified nucleic acids of the invention, can be reproduced by amplification. Amplification can also be used to clone or modify the nucleic acids of the invention. Thus, the invention provides amplification primer sequence pairs for amplifying nucleic acids of the invention. One of skill in the art can design amplification primer sequence pairs for any part of or the full length of these sequences.
In one aspect, the invention provides a nucleic acid amplified by a primer pair of the invention, e.g., a primer pair as set forth by about the first (the 5′) 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, or 25 residues of a nucleic acid of the invention, and about the first (the 5′) 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, or 25 residues of the complementary strand.
The invention provides an amplification primer sequence pair for amplifying a nucleic acid encoding a polypeptide having a transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase activity, wherein the primer pair is capable of amplifying a nucleic acid comprising a sequence of the invention, or fragments or subsequences thereof. One or each member of the amplification primer sequence pair can comprise an oligonucleotide comprising at least about 10 to 50 consecutive bases of the sequence, or about 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, or 25 consecutive bases of the sequence. The invention provides amplification primer pairs, wherein the primer pair comprises a first member having a sequence as set forth by about the first (the 5′) 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, or 25 residues of a nucleic acid of the invention, and a second member having a sequence as set forth by about the first (the 5′) 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, or 25 residues of the complementary strand of the first member. The invention provides transferases, e.g., transaminases, e.g., d-amino-acid transferases, and/or oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases generated by amplification, e.g., polymerase chain reaction (PCR), using an amplification primer pair of the invention. The invention provides methods of making a transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase by amplification, e.g., polymerase chain reaction (PCR), using an amplification primer pair of the invention. In one aspect, the amplification primer pair amplifies a nucleic acid from a library, e.g., a gene library, such as an environmental library.
Amplification reactions can also be used to quantify the amount of nucleic acid in a sample (such as the amount of message in a cell sample), label the nucleic acid (e.g., to apply it to an array or a blot), detect the nucleic acid, or quantify the amount of a specific nucleic acid in a sample. In one aspect of the invention, message isolated from a cell or a cDNA library are amplified.
The skilled artisan can select and design suitable oligonucleotide amplification primers. Amplification methods are also well known in the art, and include, e.g., polymerase chain reaction, PCR (see, e.g., PCR PROTOCOLS, A GUIDE TO METHODS AND APPLICATIONS, ed. Innis, Academic Press, N.Y. (1990) and PCR STRATEGIES (1995), ed. Innis, Academic Press, Inc., N.Y., ligase chain reaction (LCR) (see, e.g., Wu (1989) Genomics 4:560; Landegren (1988) Science 241:1077; Barringer (1990) Gene 89:117); transcription amplification (see, e.g., Kwoh (1989) Proc. Natl. Acad. Sci. USA 86:1173); and, self-sustained sequence replication (see, e.g., Guatelli (1990) Proc. Natl. Acad. Sci. USA 87:1874); Q Beta replicase amplification (see, e.g., Smith (1997) J. Clin. Microbiol. 35:1477-1491), automated Q-beta replicase amplification assay (see, e.g., Burg (1996) Mol. Cell. Probes 10:257-271) and other RNA polymerase mediated techniques (e.g., NASBA, Cangene, Mississauga, Ontario); see also Berger (1987) Methods Enzymol. 152:307-316; Sambrook; Ausubel; U.S. Pat. Nos. 4,683,195 and 4,683,202; Sooknanan (1995) Biotechnology 13:563-564.
Determining the Degree of Sequence Identity
The invention provides isolated, recombinant and/or synthetic nucleic acids comprising sequences having at least about 50%, 51%, 52%, 53%, 54%, 55%, 56%, 57%, 58%, 59%, 60%, 61%, 62%, 63%, 64%, 65%, 66%, 67%, 68%, 69%, 70%, 71%, 72%, 73%, 74%, 75%, 76%, 77%, 78%, 79%, 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or more, or complete (100%) sequence identity to an exemplary nucleic acid of the invention (as defined above) over a region of at least about 50, 75, 100, 150, 200, 250, 300, 350, 400, 450, 500, 550, 600, 650, 700, 750, 800, 850, 900, 950, 1000, 1050, 1100, 1150, 1200, 1250, 1300, 1350, 1400, 1450, 1500, 1550 or more, residues. The invention provides polypeptides comprising sequences having at least about 50%, 51%, 52%, 53%, 54%, 55%, 56%, 57%, 58%, 59%, 60%, 61%, 62%, 63%, 64%, 65%, 66%, 67%, 68%, 69%, 70%, 71%, 72%, 73%, 74%, 75%, 76%, 77%, 78%, 79%, 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or more, or complete (100%) sequence identity to an exemplary polypeptide of the invention. The extent of sequence identity (homology) may be determined using any computer program and associated parameters, including those described herein, such as BLAST 2.2.2. or FASTA version 3.0t78, with the default parameters.
In alternative embodiments, the terms “computer,” “computer program” and “processor” are used in their broadest general contexts and incorporate all such devices, as described in detail, below. A “coding sequence of” or a “sequence encodes” a particular polypeptide or protein, is a nucleic acid sequence which is transcribed and translated into a polypeptide or protein when placed under the control of appropriate regulatory sequences.
In alternative embodiments, the phrase “substantially identical” in the context of two nucleic acids or polypeptides, refers to two or more sequences that have, e.g., at least about 50%, 51%, 52%, 53%, 54%, 55%, 56%, 57%, 58%, 59%, 60%, 61%, 62%, 63%, 64%, 65%, 66%, 67%, 68%, 69%, 70%, 71%, 72%, 73%, 74%, 75%, 76%, 77%, 78%, 79%, 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or more nucleotide or amino acid residue (sequence) identity, when compared and aligned for maximum correspondence, as measured using one of the known sequence comparison algorithms or by visual inspection. Typically, the substantial identity exists over a region of at least about 100 residues and most commonly the sequences are substantially identical over at least about 150-200 residues. In some aspects, the sequences are substantially identical over the entire length of the coding regions.
In alternative embodiments, a “substantially identical” amino acid sequence is a sequence that differs from a reference sequence by one or more conservative or non-conservative amino acid substitutions, deletions, or insertions, particularly when such a substitution occurs at a site that is not the active site of the molecule and provided that the polypeptide essentially retains its functional properties. In alternative embodiments a conservative amino acid substitution, for example, substitutes one amino acid for another of the same class (e.g., substitution of one hydrophobic amino acid, such as isoleucine, valine, leucine, or methionine, for another, or substitution of one polar amino acid for another, such as substitution of arginine for lysine, glutamic acid for aspartic acid or glutamine for asparagine). One or more amino acids can be deleted, for example, from a transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase polypeptide, resulting in modification of the structure of the polypeptide, without significantly altering its biological activity. For example, amino- or carboxyl-terminal amino acids that are not required for transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase biological activity can be removed. Modified polypeptide sequences of the invention can be assayed for transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase biological activity by any number of methods, including contacting the modified polypeptide sequence with a transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase substrate and determining whether the modified polypeptide decreases the amount of specific substrate in the assay or increases the bioproducts of the enzymatic reaction of a functional transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase polypeptide with the substrate.
Nucleic acid sequences of the invention can comprise at least 10, 15, 20, 25, 30, 35, 40, 50, 75, 100, 150, 200, 300, 400, or 500 consecutive nucleotides of an exemplary sequence of the invention and sequences substantially identical thereto. Nucleic acid sequences of the invention can comprise homologous sequences and fragments of nucleic acid sequences and sequences substantially identical thereto, refer to a sequence having at least 50%, 51%, 52%, 53%, 54%, 55%, 56%, 57%, 58%, 59%, 60%, 61%, 62%, 63%, 64%, 65%, 66%, 67%, 68%, 69%, 70%, 71%, 72%, 73%, 74%, 75%, 76%, 77%, 78%, 79%, 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or more sequence identity (homology) to these sequences. Homology may be determined using any of the computer programs and parameters described herein, including FASTA version 3.0t78 with the default parameters. Homologous sequences also include RNA sequences in which uridines replace the thymines in the nucleic acid sequences of the invention. The homologous sequences may be obtained using any of the procedures described herein or may result from the correction of a sequencing error. It will be appreciated that the nucleic acid sequences of the invention and sequences substantially identical thereto, can be represented in the traditional single character format (See the inside back cover of Stryer, Lubert. Biochemistry, 3rd Ed., W. H Freeman & Co., New York.) or in any other format which records the identity of the nucleotides in a sequence.
Various sequence comparison programs identified elsewhere in this patent specification are particularly contemplated for use in this aspect of the invention. Protein and/or nucleic acid sequence homologies may be evaluated using any of the variety of sequence comparison algorithms and programs known in the art. Such algorithms and programs include, but are by no means limited to, TBLASTN, BLASTP, FASTA, TFASTA and CLUSTALW (Pearson and Lipman, Proc. Natl. Acad. Sci. USA 85(8):2444-2448, 1988; Altschul et al., J. Mol. Biol. 215(3):403-410, 1990; Thompson et al., Nucleic Acids Res. 22(2):4673-4680, 1994; Higgins et al., Methods Enzymol. 266:383-402, 1996; Altschul et al., J. Mol. Biol. 215(3):403-410, 1990; Altschul et al., Nature Genetics 3:266-272, 1993).
Homology or identity is often measured using sequence analysis software (e.g., Sequence Analysis Software Package of the Genetics Computer Group, University of Wisconsin Biotechnology Center, 1710 University Avenue, Madison, Wis. 53705). Such software matches similar sequences by assigning degrees of homology to various deletions, substitutions and other modifications. The terms “homology” and “identity” in the context of two or more nucleic acids or polypeptide sequences, refer to two or more sequences or subsequences that are the same or have a specified percentage of amino acid residues or nucleotides that are the same when compared and aligned for maximum correspondence over a comparison window or designated region as measured using any number of sequence comparison algorithms or by manual alignment and visual inspection.
For sequence comparison, typically one sequence acts as a reference sequence, to which test sequences are compared. When using a sequence comparison algorithm, test and reference sequences are entered into a computer, subsequence coordinates are designated, if necessary and sequence algorithm program parameters are designated. Default program parameters can be used, or alternative parameters can be designated. The sequence comparison algorithm then calculates the percent sequence identities for the test sequences relative to the reference sequence, based on the program parameters.
In alternative embodiments a “comparison window” includes reference to a segment of any one of the number of contiguous positions selected from the group consisting of from 20 to 600, usually about 50 to about 200, more usually about 100 to about 150 in which a sequence may be compared to a reference sequence of the same number of contiguous positions after the two sequences are optimally aligned. Methods of alignment of sequence for comparison are well-known in the art. Optimal alignment of sequences for comparison can be conducted, e.g., by the local homology algorithm of Smith & Waterman, Adv. Appl. Math. 2:482, 1981, by the homology alignment algorithm of Needleman & Wunsch, J. Mol. Biol 48:443, 1970, by the search for similarity method of person & Lipman, Proc. Nat'l. Acad. Sci. USA 85:2444, 1988, by computerized implementations of these algorithms (GAP, BESTFIT, FASTA and TFASTA in the Wisconsin Genetics Software Package, Genetics Computer Group, 575 Science Dr., Madison, Wis.), or by manual alignment and visual inspection. Other algorithms for determining homology or identity include, for example, in addition to a BLAST program (Basic Local Alignment Search Tool at the National Center for Biological Information), ALIGN, AMAS (Analysis of Multiply Aligned Sequences), AMPS (Protein Multiple Sequence Alignment), ASSET (Aligned Segment Statistical Evaluation Tool), BANDS, BESTSCOR, BIOSCAN (Biological Sequence Comparative Analysis Node), BLIMPS (BLocks IMProved Searcher), FASTA, Intervals & Points, BMB, CLUSTAL V, CLUSTAL W, CONSENSUS, LCONSENSUS, WCONSENSUS, Smith-Waterman algorithm, DARWIN, Las Vegas algorithm, FNAT (Forced Nucleotide Alignment Tool), Framealign, Framesearch, DYNAMIC, FILTER, FSAP (Fristensky Sequence Analysis Package), GAP (Global Alignment Program), GENAL, GIBBS, GenQuest, ISSC (Sensitive Sequence Comparison), LALIGN (Local Sequence Alignment), LCP (Local Content Program), MACAW (Multiple Alignment Construction & Analysis Workbench), MAP (Multiple Alignment Program), MBLKP, MBLKN, PIMA (Pattern-Induced Multi-sequence Alignment), SAGA (Sequence Alignment by Genetic Algorithm) and WHAT-IF. Such alignment programs can also be used to screen genome databases to identify polynucleotide sequences having substantially identical sequences. A number of genome databases are available, for example, a substantial portion of the human genome is available as part of the Human Genome Sequencing Project. At least twenty-one other genomes have already been sequenced, including, for example, M. genitalium (Fraser et al., 1995), M. jannaschii (Bult et al., 1996), H. influenzae (Fleischmann et al., 1995), E. coli (Blattner et al., 1997) and yeast (S. cerevisiae) (Mewes et al., 1997) and D. melanogaster (Adams et al., 2000). Significant progress has also been made in sequencing the genomes of model organism, such as mouse, C. elegans and Arabadopsis sp. Several databases containing genomic information annotated with some functional information are maintained by different organization and are accessible via the internet
One example of a useful algorithm is BLAST and BLAST 2.0 algorithms, which are described in Altschul et al., Nuc. Acids Res. 25:3389-3402, 1977 and Altschul et al., J. Mol. Biol. 215:403-410, 1990, respectively. Software for performing BLAST analyses is publicly available through the National Center for Biotechnology Information. This algorithm involves first identifying high scoring sequence pairs (HSPs) by identifying short words of length W in the query sequence, which either match or satisfy some positive-valued threshold score T when aligned with a word of the same length in a database sequence. T is referred to as the neighborhood word score threshold (Altschul et al., supra). These initial neighborhood word hits act as seeds for initiating searches to find longer HSPs containing them. The word hits are extended in both directions along each sequence for as far as the cumulative alignment score can be increased. Cumulative scores are calculated using, for nucleotide sequences, the parameters M (reward score for a pair of matching residues; always >0). For amino acid sequences, a scoring matrix is used to calculate the cumulative score. Extension of the word hits in each direction are halted when: the cumulative alignment score falls off by the quantity X from its maximum achieved value; the cumulative score goes to zero or below, due to the accumulation of one or more negative-scoring residue alignments; or the end of either sequence is reached. The BLAST algorithm parameters W, T and X determine the sensitivity and speed of the alignment. The BLASTN program (for nucleotide sequences) uses as defaults a wordlength (W) of 11, an expectation (E) of 10, M=5, N=−4 and a comparison of both strands. For amino acid sequences, the BLASTP program uses as defaults a wordlength of 3 and expectations (E) of 10 and the BLOSUM62 scoring matrix (see Henikoff & Henikoff, Proc. Natl. Acad. Sci. USA 89:10915, 1989) alignments (B) of 50, expectation (E) of 10, M=5, N=−4 and a comparison of both strands.
The BLAST algorithm also performs a statistical analysis of the similarity between two sequences (see, e.g., Karlin & Altschul, Proc. Natl. Acad. Sci. USA 90:5873, 1993). One measure of similarity provided by BLAST algorithm is the smallest sum probability (P(N)), which provides an indication of the probability by which a match between two nucleotide or amino acid sequences would occur by chance. For example, a nucleic acid is considered similar to a references sequence if the smallest sum probability in a comparison of the test nucleic acid to the reference nucleic acid is less than about 0.2, more preferably less than about 0.01 and most preferably less than about 0.001.
In one aspect, protein and nucleic acid sequence homologies are evaluated using the Basic Local Alignment Search Tool (“BLAST”) In particular, five specific BLAST programs are used to perform the following task:

    
    
        (1) BLASTP and BLAST3 compare an amino acid query sequence against a protein sequence database;
        (2) BLASTN compares a nucleotide query sequence against a nucleotide sequence database;
        (3) BLASTX compares the six-frame conceptual translation products of a query nucleotide sequence (both strands) against a protein sequence database;
        (4) TBLASTN compares a query protein sequence against a nucleotide sequence database translated in all six reading frames (both strands); and
        (5) TBLASTX compares the six-frame translations of a nucleotide query sequence against the six-frame translations of a nucleotide sequence database.
    
    


The BLAST programs identify homologous sequences by identifying similar segments, which are referred to herein as “high-scoring segment pairs,” between a query amino or nucleic acid sequence and a test sequence which is preferably obtained from a protein or nucleic acid sequence database. High-scoring segment pairs are preferably identified (i.e., aligned) by means of a scoring matrix, many of which are known in the art. Preferably, the scoring matrix used is the BLOSUM62 matrix (Gonnet et al., Science 256:1443-1445, 1992; Henikoff and Henikoff, Proteins 17:49-61, 1993). Less preferably, the PAM or PAM250 matrices may also be used (see, e.g., Schwartz and Dayhoff, eds., 1978, Matrices for Detecting Distance Relationships: Atlas of Protein Sequence and Structure, Washington: National Biomedical Research Foundation). BLAST programs are accessible through the U.S. National Library of Medicine.
The parameters used with the above algorithms may be adapted depending on the sequence length and degree of homology studied. In some aspects, the parameters may be the default parameters used by the algorithms in the absence of instructions from the user.
Computer Systems and Computer Program Products
To determine and identify sequence identities, structural homologies, motifs and the like in silico, a nucleic acid or polypeptide sequence of the invention can be stored, recorded, and manipulated on any medium which can be read and accessed by a computer.
Accordingly, the invention provides computers, computer systems, computer readable mediums, computer programs products and the like recorded or stored thereon the nucleic acid and polypeptide sequences of the invention. As used herein, the words “recorded” and “stored” refer to a process for storing information on a computer medium. A skilled artisan can readily adopt any known methods for recording information on a computer readable medium to generate manufactures comprising one or more of the nucleic acid and/or polypeptide sequences of the invention.
The polypeptides of the invention include the exemplary sequences of the invention, and sequences substantially identical thereto, and fragments of any of the preceding sequences. Substantially identical, or homologous, polypeptide sequences refer to a polypeptide sequence having at least 50%, 51%, 52%, 53%, 54%, 55%, 56%, 57%, 58%, 59%, 60%, 61%, 62%, 63%, 64%, 65%, 66%, 67%, 68%, 69%, 70%, 71%, 72%, 73%, 74%, 75%, 76%, 77%, 78%, 79%, 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or more, or complete (100%) sequence identity to an exemplary sequence of the invention, e.g., a polypeptide sequences of the invention.
Homology may be determined using any of the computer programs and parameters described herein, including FASTA version 3.0t78 with the default parameters or with any modified parameters. The homologous sequences may be obtained using any of the procedures described herein or may result from the correction of a sequencing error. The polypeptide fragments comprise at least about 10, 15, 20, 25, 30, 35, 40, 45, 50, 75, 100, 150, 200, 250, 300, 350, 400, 450, 500 or more consecutive amino acids of the polypeptides of the invention and sequences substantially identical thereto. It will be appreciated that the polypeptide codes of amino acid sequences of the invention and sequences substantially identical thereto, can be represented in the traditional single character format or three letter format (See Stryer, Lubert. Biochemistry, 3rd Ed., supra) or in any other format which relates the identity of the polypeptides in a sequence.
A nucleic acid or polypeptide sequence of the invention can be stored, recorded and manipulated on any medium which can be read and accessed by a computer. As used herein, the words “recorded” and “stored” refer to a process for storing information on a computer medium. A skilled artisan can readily adopt any of the presently known methods for recording information on a computer readable medium to generate manufactures comprising one or more of the nucleic acid sequences of the invention and sequences substantially identical thereto, one or more of the polypeptide sequences of the invention and sequences substantially identical thereto. Another aspect of the invention is a computer readable medium having recorded thereon at least 2, 5, 10, 15, or 20 or more nucleic acid sequences of the invention and sequences substantially identical thereto.
Another aspect of the invention is a computer readable medium having recorded thereon one or more of the nucleic acid sequences of the invention and sequences substantially identical thereto. Another aspect of the invention is a computer readable medium having recorded thereon one or more of the polypeptide sequences of the invention and sequences substantially identical thereto. Another aspect of the invention is a computer readable medium having recorded thereon at least 2, 5, 10, 15, or 20 or more of the sequences as set forth above.
Computer readable media include magnetically readable media, optically readable media, electronically readable media and magnetic/optical media. For example, the computer readable media may be a hard disk, a floppy disk, a magnetic tape, CD-ROM, Digital Versatile Disk (DVD), Random Access Memory (RAM), or Read Only Memory (ROM) as well as other types of other media known to those skilled in the art.
Aspects of the invention include systems (e.g., internet based systems), particularly computer systems which store and manipulate the sequence information described herein. One example of a computer system 100 is illustrated in block diagram form in FIG. 1. As used herein, “a computer system” refers to the hardware components, software components and data storage components used to analyze a nucleotide sequence of a nucleic acid sequence of the invention and sequences substantially identical thereto, or a polypeptide sequence as set forth in the amino acid sequences of the invention. The computer system 100 typically includes a processor for processing, accessing and manipulating the sequence data. The processor 105 can be any well-known type of central processing unit, such as, for example, the Pentium III from Intel Corporation, or similar processor from Sun, Motorola, Compaq, AMD or International Business Machines.
Typically the computer system 100 is a general purpose system that comprises the processor 105 and one or more internal data storage components 110 for storing data and one or more data retrieving devices for retrieving the data stored on the data storage components. A skilled artisan can readily appreciate that any one of the currently available computer systems are suitable.
In one particular aspect, the computer system 100 includes a processor 105 connected to a bus which is connected to a main memory 115 (preferably implemented as RAM) and one or more internal data storage devices 110, such as a hard drive and/or other computer readable media having data recorded thereon. In some aspects, the computer system 100 further includes one or more data retrieving device 118 for reading the data stored on the internal data storage devices 110.
The data retrieving device 118 may represent, for example, a floppy disk drive, a compact disk drive, a magnetic tape drive, or a modem capable of connection to a remote data storage system (e.g., via the internet) etc. In some aspects, the internal data storage device 110 is a removable computer readable medium such as a floppy disk, a compact disk, a magnetic tape, etc. containing control logic and/or data recorded thereon. The computer system 100 may advantageously include or be programmed by appropriate software for reading the control logic and/or the data from the data storage component once inserted in the data retrieving device.
The computer system 100 includes a display 120 which is used to display output to a computer user. It should also be noted that the computer system 100 can be linked to other computer systems 125a-c in a network or wide area network to provide centralized access to the computer system 100.
Software for accessing and processing the nucleotide sequences of a nucleic acid sequence of the invention and sequences substantially identical thereto, or a polypeptide sequence of the invention and sequences substantially identical thereto, (such as search tools, compare tools and modeling tools etc.) may reside in main memory 115 during execution.
In some aspects, the computer system 100 may further comprise a sequence comparison algorithm for comparing a nucleic acid sequence of the invention and sequences substantially identical thereto, or a polypeptide sequence of the invention and sequences substantially identical thereto, stored on a computer readable medium to a reference nucleotide or polypeptide sequence(s) stored on a computer readable medium. A “sequence comparison algorithm” refers to one or more programs which are implemented (locally or remotely) on the computer system 100 to compare a nucleotide sequence with other nucleotide sequences and/or compounds stored within a data storage means. For example, the sequence comparison algorithm may compare the nucleotide sequences of a nucleic acid sequence of the invention and sequences substantially identical thereto, or a polypeptide sequence of the invention and sequences substantially identical thereto, stored on a computer readable medium to reference sequences stored on a computer readable medium to identify homologies or structural motifs.
FIG. 2 is a flow diagram illustrating one aspect of a process 200 for comparing a new nucleotide or protein sequence with a database of sequences in order to determine the homology levels between the new sequence and the sequences in the database. The database of sequences can be a private database stored within the computer system 100, or a public database such as GENBANK that is available through the Internet.
The process 200 begins at a start state 201 and then moves to a state 202 wherein the new sequence to be compared is stored to a memory in a computer system 100. As discussed above, the memory could be any type of memory, including RAM or an internal storage device.
The process 200 then moves to a state 204 wherein a database of sequences is opened for analysis and comparison. The process 200 then moves to a state 206 wherein the first sequence stored in the database is read into a memory on the computer. A comparison is then performed at a state 210 to determine if the first sequence is the same as the second sequence. It is important to note that this step is not limited to performing an exact comparison between the new sequence and the first sequence in the database. Well-known methods are known to those of skill in the art for comparing two nucleotide or protein sequences, even if they are not identical. For example, gaps can be introduced into one sequence in order to raise the homology level between the two tested sequences. The parameters that control whether gaps or other features are introduced into a sequence during comparison are normally entered by the user of the computer system.
Once a comparison of the two sequences has been performed at the state 210, a determination is made at a decision state 210 whether the two sequences are the same. Of course, the term “same” is not limited to sequences that are absolutely identical. Sequences that are within the homology parameters entered by the user will be marked as “same” in the process 200.
If a determination is made that the two sequences are the same, the process 200 moves to a state 214 wherein the name of the sequence from the database is displayed to the user. This state notifies the user that the sequence with the displayed name fulfills the homology constraints that were entered. Once the name of the stored sequence is displayed to the user, the process 200 moves to a decision state 218 wherein a determination is made whether more sequences exist in the database. If no more sequences exist in the database, then the process 200 terminates at an end state 220. However, if more sequences do exist in the database, then the process 200 moves to a state 224 wherein a pointer is moved to the next sequence in the database so that it can be compared to the new sequence. In this manner, the new sequence is aligned and compared with every sequence in the database.
It should be noted that if a determination had been made at the decision state 212 that the sequences were not homologous, then the process 200 would move immediately to the decision state 218 in order to determine if any other sequences were available in the database for comparison.
Accordingly, one aspect of the invention is a computer system comprising a processor, a data storage device having stored thereon a nucleic acid sequence of the invention and sequences substantially identical thereto, or a polypeptide sequence of the invention and sequences substantially identical thereto, a data storage device having retrievably stored thereon reference nucleotide sequences or polypeptide sequences to be compared to a nucleic acid sequence of the invention and sequences substantially identical thereto, or a polypeptide sequence of the invention and sequences substantially identical thereto and a sequence comparer for conducting the comparison. The sequence comparer may indicate a homology level between the sequences compared or identify structural motifs in the above described nucleic acid code of nucleic acid sequences of the invention and sequences substantially identical thereto, or a polypeptide sequence of the invention and sequences substantially identical thereto, or it may identify structural motifs in sequences which are compared to these nucleic acid codes and polypeptide codes. In some aspects, the data storage device may have stored thereon the sequences of at least 2, 5, 10, 15, 20, 25, 30 or 40 or more of the nucleic acid sequences of the invention and sequences substantially identical thereto, or the polypeptide sequences of the invention and sequences substantially identical thereto.
Another aspect of the invention is a method for determining the level of homology between a nucleic acid sequence of the invention and sequences substantially identical thereto, or a polypeptide sequence of the invention and sequences substantially identical thereto and a reference nucleotide sequence. The method including reading the nucleic acid code or the polypeptide code and the reference nucleotide or polypeptide sequence through the use of a computer program which determines homology levels and determining homology between the nucleic acid code or polypeptide code and the reference nucleotide or polypeptide sequence with the computer program. The computer program may be any of a number of computer programs for determining homology levels, including those specifically enumerated herein, (e.g., BLAST2N with the default parameters or with any modified parameters). The method may be implemented using the computer systems described above. The method may also be performed by reading at least 2, 5, 10, 15, 20, 25, 30 or 40 or more of the above described nucleic acid sequences of the invention, or the polypeptide sequences of the invention through use of the computer program and determining homology between the nucleic acid codes or polypeptide codes and reference nucleotide sequences or polypeptide sequences.
FIG. 3 is a flow diagram illustrating one aspect of a process 250 in a computer for determining whether two sequences are homologous. The process 250 begins at a start state 252 and then moves to a state 254 wherein a first sequence to be compared is stored to a memory. The second sequence to be compared is then stored to a memory at a state 256. The process 250 then moves to a state 260 wherein the first character in the first sequence is read and then to a state 262 wherein the first character of the second sequence is read. It should be understood that if the sequence is a nucleotide sequence, then the character would normally be either A, T, C, G or U. If the sequence is a protein sequence, then it is preferably in the single letter amino acid code so that the first and sequence sequences can be easily compared.
A determination is then made at a decision state 264 whether the two characters are the same. If they are the same, then the process 250 moves to a state 268 wherein the next characters in the first and second sequences are read. A determination is then made whether the next characters are the same. If they are, then the process 250 continues this loop until two characters are not the same. If a determination is made that the next two characters are not the same, the process 250 moves to a decision state 274 to determine whether there are any more characters either sequence to read.
If there are not any more characters to read, then the process 250 moves to a state 276 wherein the level of homology between the first and second sequences is displayed to the user. The level of homology is determined by calculating the proportion of characters between the sequences that were the same out of the total number of sequences in the first sequence. Thus, if every character in a first 100 nucleotide sequence aligned with a every character in a second sequence, the homology level would be 100%.
Alternatively, the computer program may be a computer program which compares the nucleotide sequences of a nucleic acid sequence as set forth in the invention, to one or more reference nucleotide sequences in order to determine whether the nucleic acid code of a nucleic acid sequence of the invention and sequences substantially identical thereto, differs from a reference nucleic acid sequence at one or more positions. In one aspect such a program records the length and identity of inserted, deleted or substituted nucleotides with respect to the sequence of either the reference polynucleotide or a nucleic acid sequence of the invention and sequences substantially identical thereto. In one aspect, the computer program may be a program which determines whether a nucleic acid sequence of the invention and sequences substantially identical thereto, contains a single nucleotide polymorphism (SNP) with respect to a reference nucleotide sequence.
Another aspect of the invention is a method for determining whether a nucleic acid sequence of the invention and sequences substantially identical thereto, differs at one or more nucleotides from a reference nucleotide sequence comprising the steps of reading the nucleic acid code and the reference nucleotide sequence through use of a computer program which identifies differences between nucleic acid sequences and identifying differences between the nucleic acid code and the reference nucleotide sequence with the computer program. In some aspects, the computer program is a program which identifies single nucleotide polymorphisms. The method may be implemented by the computer systems described above and the method illustrated in FIG. 3. The method may also be performed by reading at least 2, 5, 10, 15, 20, 25, 30, or 40 or more of the nucleic acid sequences of the invention and sequences substantially identical thereto and the reference nucleotide sequences through the use of the computer program and identifying differences between the nucleic acid codes and the reference nucleotide sequences with the computer program.
In other aspects the computer based system may further comprise an identifier for identifying features within a nucleic acid sequence of the invention or a polypeptide sequence of the invention and sequences substantially identical thereto.
An “identifier” refers to one or more programs which identifies certain features within a nucleic acid sequence of the invention and sequences substantially identical thereto, or a polypeptide sequence of the invention and sequences substantially identical thereto. In one aspect, the identifier may comprise a program which identifies an open reading frame in a nucleic acid sequence of the invention and sequences substantially identical thereto.
FIG. 4 is a flow diagram illustrating one aspect of an identifier process 300 for detecting the presence of a feature in a sequence. The process 300 begins at a start state 302 and then moves to a state 304 wherein a first sequence that is to be checked for features is stored to a memory 115 in the computer system 100. The process 300 then moves to a state 306 wherein a database of sequence features is opened. Such a database would include a list of each feature's attributes along with the name of the feature. For example, a feature name could be “Initiation Codon” and the attribute would be “ATG”. Another example would be the feature name “TAATAA Box” and the feature attribute would be “TAATAA”. An example of such a database is produced by the University of Wisconsin Genetics Computer Group. Alternatively, the features may be structural polypeptide motifs such as alpha helices, beta sheets, or functional polypeptide motifs such as enzymatic active sites, helix-turn-helix motifs or other motifs known to those skilled in the art.
Once the database of features is opened at the state 306, the process 300 moves to a state 308 wherein the first feature is read from the database. A comparison of the attribute of the first feature with the first sequence is then made at a state 310. A determination is then made at a decision state 316 whether the attribute of the feature was found in the first sequence. If the attribute was found, then the process 300 moves to a state 318 wherein the name of the found feature is displayed to the user.
The process 300 then moves to a decision state 320 wherein a determination is made whether move features exist in the database. If no more features do exist, then the process 300 terminates at an end state 324. However, if more features do exist in the database, then the process 300 reads the next sequence feature at a state 326 and loops back to the state 310 wherein the attribute of the next feature is compared against the first sequence. It should be noted, that if the feature attribute is not found in the first sequence at the decision state 316, the process 300 moves directly to the decision state 320 in order to determine if any more features exist in the database.
Accordingly, another aspect of the invention is a method of identifying a feature within a nucleic acid sequence of the invention and sequences substantially identical thereto, or a polypeptide sequence of the invention and sequences substantially identical thereto, comprising reading the nucleic acid code(s) or polypeptide code(s) through the use of a computer program which identifies features therein and identifying features within the nucleic acid code(s) with the computer program. In one aspect, computer program comprises a computer program which identifies open reading frames. The method may be performed by reading a single sequence or at least 2, 5, 10, 15, 20, 25, 30, or 40 of the nucleic acid sequences of the invention and sequences substantially identical thereto, or the polypeptide sequences of the invention and sequences substantially identical thereto, through the use of the computer program and identifying features within the nucleic acid codes or polypeptide codes with the computer program.
A nucleic acid sequence of the invention and sequences substantially identical thereto, or a polypeptide sequence of the invention and sequences substantially identical thereto, may be stored and manipulated in a variety of data processor programs in a variety of formats. For example, a nucleic acid sequence of the invention and sequences substantially identical thereto, or a polypeptide sequence of the invention and sequences substantially identical thereto, may be stored as text in a word processing file, such as Microsoft WORDTM or WORDPERFECTTM or as an ASCII file in a variety of database programs familiar to those of skill in the art, such as DB2TM SYBASETM, or ORACLETM. In addition, many computer programs and databases may be used as sequence comparison algorithms, identifiers, or sources of reference nucleotide sequences or polypeptide sequences to be compared to a nucleic acid sequence of the invention and sequences substantially identical thereto, or a polypeptide sequence of the invention and sequences substantially identical thereto. The following list is intended not to limit the invention but to provide guidance to programs and databases which are useful with the nucleic acid sequences of the invention and sequences substantially identical thereto, or the polypeptide sequences of the invention and sequences substantially identical thereto.
The programs and databases which may be used include, but are not limited to: MacPattern (EMBL), DiscoveryBase (Molecular Applications Group), GeneMine (Molecular Applications Group), Look (Molecular Applications Group), MacLook (Molecular Applications Group), BLAST and BLAST2 (NCBI), BLASTN and BLASTX (Altschul et al, J. Mol. Biol. 215: 403, 1990), FASTA (Pearson and Lipman, Proc. Natl. Acad. Sci. USA, 85: 2444, 1988), FASTDB (Brutlag et al. Comp. App. Biosci. 6:237-245, 1990), Catalyst (Molecular Simulations Inc.), Catalyst/SHAPE (Molecular Simulations Inc.), Cerius2.DBAccess (Molecular Simulations Inc.), HypoGen (Molecular Simulations Inc.), Insight II, (Molecular Simulations Inc.), Discover (Molecular Simulations Inc.), CHARMm (Molecular Simulations Inc.), Felix (Molecular Simulations Inc.), DelPhi, (Molecular Simulations Inc.), QuanteMM, (Molecular Simulations Inc.), Homology (Molecular Simulations Inc.), Modeler (Molecular Simulations Inc.), ISIS (Molecular Simulations Inc.), Quanta/Protein Design (Molecular Simulations Inc.), WebLab (Molecular Simulations Inc.), WebLab Diversity Explorer (Molecular Simulations Inc.), Gene Explorer (Molecular Simulations Inc.), SeqFold (Molecular Simulations Inc.), the MDL Available Chemicals Directory database, the MDL Drug Data Report data base, the Comprehensive Medicinal Chemistry database, Derwents's World Drug Index database, the BioByteMasterFile database, the Genbank database and the Genseqn database. Many other programs and data bases would be apparent to one of skill in the art given the present disclosure.
Motifs which may be detected using the above programs include sequences encoding leucine zippers, helix-turn-helix motifs, glycosylation sites, ubiquitination sites, alpha helices and beta sheets, signal sequences encoding signal peptides which direct the secretion of the encoded proteins, sequences implicated in transcription regulation such as homeoboxes, acidic stretches, enzymatic active sites, substrate binding sites and enzymatic cleavage sites.
Hybridization of Nucleic Acids
The invention provides isolated, synthetic or recombinant nucleic acids that hybridize under stringent conditions to an exemplary sequence of the invention. The stringent conditions can be highly stringent conditions, medium stringent conditions and/or low stringent conditions, including the high and reduced stringency conditions described herein. In one aspect, it is the stringency of the wash conditions that set forth the conditions which determine whether a nucleic acid is within the scope of the invention, as discussed below.
In alternative aspects, nucleic acids of the invention as defined by their ability to hybridize under stringent conditions can be between about five residues and the full length of nucleic acid of the invention; e.g., they can be at least 5, 10, 15, 20, 25, 30, 35, 40, 50, 55, 60, 65, 70, 75, 80, 90, 100, 150, 200, 250, 300, 350, 400, 450, 500, 550, 600, 650, 700, 750, 800, 850, 900, 950, 1000, or more, residues in length. Nucleic acids shorter than full length are also included. These nucleic acids can be useful as, e.g., hybridization probes, labeling probes, PCR oligonucleotide probes, iRNA (single or double stranded), antisense or sequences encoding antibody binding peptides (epitopes), motifs, active sites and the like.
In one aspect, nucleic acids of the invention are defined by their ability to hybridize under high stringency comprises conditions of about 50% formamide at about 37° C. to 42° C. In one aspect, nucleic acids of the invention are defined by their ability to hybridize under reduced stringency comprising conditions in about 35% to 25% formamide at about 30° C. to 35° C.
Alternatively, nucleic acids of the invention are defined by their ability to hybridize under high stringency comprising conditions at 42° C. in 50% formamide, 5×SSPE, 0.3% SDS, and a repetitive sequence blocking nucleic acid, such as cot-1 or salmon sperm DNA (e.g., 200 ug/ml sheared and denatured salmon sperm DNA). In one aspect, nucleic acids of the invention are defined by their ability to hybridize under reduced stringency conditions comprising 35% formamide at a reduced temperature of 35° C.
In nucleic acid hybridization reactions, the conditions used to achieve a particular level of stringency will vary, depending on the nature of the nucleic acids being hybridized. For example, the length, degree of complementarity, nucleotide sequence composition (e.g., GC v. AT content) and nucleic acid type (e.g., RNA v. DNA) of the hybridizing regions of the nucleic acids can be considered in selecting hybridization conditions. An additional consideration is whether one of the nucleic acids is immobilized, for example, on a filter.
Hybridization may be carried out under conditions of low stringency, moderate stringency or high stringency. As an example of nucleic acid hybridization, a polymer membrane containing immobilized denatured nucleic acids is first prehybridized for 30 minutes at 45 C in a solution consisting of 0.9 M NaCl, 50 mM NaH2PO4, pH 7.0, 5.0 mM Na2EDTA, 0.5% SDS, 10×Denhardt's and 0.5 mg/ml polyriboadenylic acid. Approximately 2×107 cpm (specific activity 4-9×108 cpm/ug) of 32P end-labeled oligonucleotide probe are then added to the solution. After 12-16 hours of incubation, the membrane is washed for 30 minutes at room temperature in 1×SET (150 mM NaCl, 20 mM Tris hydrochloride, pH 7.8, 1 mM Na2EDTA) containing 0.5% SDS, followed by a 30 minute wash in fresh 1×SET at Tm-10 C for the oligonucleotide probe. The membrane is then exposed to auto-radiographic film for detection of hybridization signals.
All of the foregoing hybridizations would be considered to be under conditions of high stringency.
Following hybridization, a filter can be washed to remove any non-specifically bound detectable probe. The stringency used to wash the filters can also be varied depending on the nature of the nucleic acids being hybridized, the length of the nucleic acids being hybridized, the degree of complementarity, the nucleotide sequence composition (e.g., GC v. AT content) and the nucleic acid type (e.g., RNA v. DNA). Examples of progressively higher stringency condition washes are as follows: 2×SSC, 0.1% SDS at room temperature for 15 minutes (low stringency); 0.1×SSC, 0.5% SDS at room temperature for 30 minutes to 1 hour (moderate stringency); 0.1×SSC, 0.5% SDS for 15 to 30 minutes at between the hybridization temperature and 68° C. (high stringency); and 0.15M NaCl for 15 minutes at 72° C. (very high stringency). A final low stringency wash can be conducted in 0.1×SSC at room temperature. The examples above are merely illustrative of one set of conditions that can be used to wash filters. One of skill in the art would know that there are numerous recipes for different stringency washes. Some other examples are given below.
Nucleic acids which have hybridized to the probe are identified by autoradiography or other conventional techniques.
The above procedure may be modified to identify nucleic acids having decreasing levels of homology to the probe sequence. For example, to obtain nucleic acids of decreasing homology to the detectable probe, less stringent conditions may be used. For example, the hybridization temperature may be decreased in increments of 5 C from 68 C to 42 C in a hybridization buffer having a Na+concentration of approximately 1M. Following hybridization, the filter may be washed with 2×SSC, 0.5% SDS at the temperature of hybridization. These conditions are considered to be “moderate” conditions above 50 C and “low” conditions below 50 C. A specific example of “moderate” hybridization conditions is when the above hybridization is conducted at 55 C. A specific example of “low stringency” hybridization conditions is when the above hybridization is conducted at 45 C.
Alternatively, the hybridization may be carried out in buffers, such as 6×SSC, containing formamide at a temperature of 42 C. In this case, the concentration of formamide in the hybridization buffer may be reduced in 5% increments from 50% to 0% to identify clones having decreasing levels of homology to the probe. Following hybridization, the filter may be washed with 6×SSC, 0.5% SDS at 50 C. These conditions are considered to be “moderate” conditions above 25% formamide and “low” conditions below 25% formamide. A specific example of “moderate” hybridization conditions is when the above hybridization is conducted at 30% formamide A specific example of “low stringency” hybridization conditions is when the above hybridization is conducted at 10% formamide.
However, the selection of a hybridization format is not critical—it is the stringency of the wash conditions that set forth the conditions which determine whether a nucleic acid is within the scope of the invention. Wash conditions used to identify nucleic acids within the scope of the invention include, e.g.: a salt concentration of about 0.02 molar at pH 7 and a temperature of at least about 50° C. or about 55° C. to about 60° C.; or, a salt concentration of about 0.15 M NaCl at 72° C. for about 15 minutes; or, a salt concentration of about 0.2×SSC at a temperature of at least about 50° C. or about 55° C. to about 60° C. for about 15 to about 20 minutes; or, the hybridization complex is washed twice with a solution with a salt concentration of about 2×SSC containing 0.1% SDS at room temperature for 15 minutes and then washed twice by 0.1×SSC containing 0.1% SDS at 68° C. for 15 minutes; or, equivalent conditions. See Sambrook, Tijssen and Ausubel for a description of SSC buffer and equivalent conditions.
These methods may be used to isolate nucleic acids of the invention. For example, the preceding methods may be used to isolate nucleic acids having a sequence with at least about 97%, at least 95%, at least 90%, at least 85%, at least 80%, at least 75%, at least 70%, at least 65%, at least 60%, at least 55%, or at least 50% homology to a nucleic acid sequence selected from the group consisting of one of the sequences of The invention and sequences substantially identical thereto, or fragments comprising at least about 10, 15, 20, 25, 30, 35, 40, 50, 75, 100, 150, 200, 300, 400, or 500 consecutive bases thereof and the sequences complementary thereto. Homology may be measured using the alignment algorithm. For example, the homologous polynucleotides may have a coding sequence which is a naturally occurring allelic variant of one of the coding sequences described herein. Such allelic variants may have a substitution, deletion or addition of one or more nucleotides when compared to the nucleic acids of the invention or the sequences complementary thereto.
Additionally, the above procedures may be used to isolate nucleic acids which encode polypeptides having at least about 99%, 95%, at least 90%, at least 85%, at least 80%, at least 75%, at least 70%, at least 65%, at least 60%, at least 55%, or at least 50% homology to a polypeptide having the sequence of one of amino acid sequences of the invention, or fragments comprising at least 5, 10, 15, 20, 25, 30, 35, 40, 50, 75, 100, or 150 consecutive amino acids thereof as determined using a sequence alignment algorithm (e.g., such as the FASTA version 3.0t78 algorithm with the default parameters).
Oligonucleotides Probes and Methods for Using them
The invention also provides nucleic acid probes that can be used, e.g., for identifying nucleic acids encoding a polypeptide with a transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase activity or fragments thereof or for identifying transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase genes. In one aspect, the probe comprises at least 10 consecutive bases of a nucleic acid of the invention. Alternatively, a probe of the invention can be at least about 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 30, 35, 40, 45, 50, 60, 70, 80, 90, 100, 110, 120, 130, 150 or about 10 to 50, about 20 to 60 about 30 to 70, consecutive bases of a sequence as set forth in a nucleic acid of the invention. The probes identify a nucleic acid by binding and/or hybridization. The probes can be used in arrays of the invention, see discussion below, including, e.g., capillary arrays. The probes of the invention can also be used to isolate other nucleic acids or polypeptides.
The isolated, synthetic or recombinant nucleic acids of the invention and sequences substantially identical thereto, the sequences complementary thereto, or a fragment comprising at least 10, 15, 20, 25, 30, 35, 40, 50, 75, 100, 150, 200, 300, 400, or 500 consecutive bases of one of the sequences of The invention and sequences substantially identical thereto, or the sequences complementary thereto may also be used as probes to determine whether a biological sample, such as a soil sample, contains an organism having a nucleic acid sequence of the invention or an organism from which the nucleic acid was obtained. In such procedures, a biological sample potentially harboring the organism from which the nucleic acid was isolated is obtained and nucleic acids are obtained from the sample. The nucleic acids are contacted with the probe under conditions which permit the probe to specifically hybridize to any complementary sequences from which are present therein.
Where necessary, conditions which permit the probe to specifically hybridize to complementary sequences may be determined by placing the probe in contact with complementary sequences from samples known to contain the complementary sequence as well as control sequences which do not contain the complementary sequence. Hybridization conditions, such as the salt concentration of the hybridization buffer, the formamide concentration of the hybridization buffer, or the hybridization temperature, may be varied to identify conditions which allow the probe to hybridize specifically to complementary nucleic acids.
If the sample contains the organism from which the nucleic acid was isolated, specific hybridization of the probe is then detected. Hybridization may be detected by labeling the probe with a detectable agent such as a radioactive isotope, a fluorescent dye or an enzyme capable of catalyzing the formation of a detectable product.
Many methods for using the labeled probes to detect the presence of complementary nucleic acids in a sample are familiar to those skilled in the art. These include Southern Blots, Northern Blots, colony hybridization procedures and dot blots. Protocols for each of these procedures are provided in Ausubel et al. Current Protocols in Molecular Biology, John Wiley 503 Sons, Inc. (1997) and Sambrook et al., Molecular Cloning: A Laboratory Manual 2nd Ed., Cold Spring Harbor Laboratory Press (1989.
Alternatively, more than one probe (at least one of which is capable of specifically hybridizing to any complementary sequences which are present in the nucleic acid sample), may be used in an amplification reaction to determine whether the sample contains an organism containing a nucleic acid sequence of the invention (e.g., an organism from which the nucleic acid was isolated). Typically, the probes comprise oligonucleotides. In one aspect, the amplification reaction may comprise a PCR reaction. PCR protocols are described in Ausubel and Sambrook, supra. Alternatively, the amplification may comprise a ligase chain reaction, 3SR, or strand displacement reaction. (See Barany, F., “The Ligase Chain Reaction in a PCR World”, PCR Methods and Applications 1:5-16, 1991; E. Fahy et al., “Self-sustained Sequence Replication (3SR): An Isothermal Transcription-based Amplification System Alternative to PCR”, PCR Methods and Applications 1:25-33, 1991; and Walker G. T. et al., “Strand Displacement Amplification—an Isothermal in vitro DNA Amplification Technique”, Nucleic Acid Research 20:1691-1696, 1992). In such procedures, the nucleic acids in the sample are contacted with the probes, the amplification reaction is performed and any resulting amplification product is detected. The amplification product may be detected by performing gel electrophoresis on the reaction products and staining the gel with an intercalator such as ethidium bromide. Alternatively, one or more of the probes may be labeled with a radioactive isotope and the presence of a radioactive amplification product may be detected by autoradiography after gel electrophoresis.
Probes derived from sequences near the ends of the sequences of The invention and sequences substantially identical thereto, may also be used in chromosome walking procedures to identify clones containing genomic sequences located adjacent to the sequences of The invention and sequences substantially identical thereto. Such methods allow the isolation of genes which encode additional proteins from the host organism.
The isolated, synthetic or recombinant nucleic acids of the invention and sequences substantially identical thereto, the sequences complementary thereto, or a fragment comprising at least 10, 15, 20, 25, 30, 35, 40, 50, 75, 100, 150, 200, 300, 400, or 500 consecutive bases of one of the sequences of the invention and sequences substantially identical thereto, or the sequences complementary thereto may be used as probes to identify and isolate related nucleic acids. In some aspects, the related nucleic acids may be cDNAs or genomic DNAs from organisms other than the one from which the nucleic acid was isolated. For example, the other organisms may be related organisms. In such procedures, a nucleic acid sample is contacted with the probe under conditions which permit the probe to specifically hybridize to related sequences. Hybridization of the probe to nucleic acids from the related organism is then detected using any of the methods described above.
By varying the stringency of the hybridization conditions used to identify nucleic acids, such as cDNAs or genomic DNAs, which hybridize to the detectable probe, nucleic acids having different levels of homology to the probe can be identified and isolated. Stringency may be varied by conducting the hybridization at varying temperatures below the melting temperatures of the probes. The melting temperature, Tm, is the temperature (under defined ionic strength and pH) at which 50% of the target sequence hybridizes to a perfectly complementary probe. Very stringent conditions are selected to be equal to or about 5° C. lower than the Tm for a particular probe. The melting temperature of the probe may be calculated using the following formulas:
For probes between 14 and 70 nucleotides in length the melting temperature (Tm) is calculated using the formula: Tm=81.5+16.6(log Na+1)+0.41(fraction G+C)−(600/N) where N is the length of the probe.
If the hybridization is carried out in a solution containing formamide, the melting temperature may be calculated using the equation: Tm=81.5+16.6(log Na+1)+0.41(fraction G+C)−(0.63% formamide)−(600/N) where N is the length of the probe.
Prehybridization may be carried out in 6×SSC, 5×Denhardt's reagent, 0.5% SDS, 100 g/ml denatured fragmented salmon sperm DNA or 6×SSC, 5×Denhardt's reagent, 0.5% SDS, 100 g/ml denatured fragmented salmon sperm DNA, 50% formamide. The formulas for SSC and Denhardt's solutions are listed in Sambrook et al., supra.
Hybridization is conducted by adding the detectable probe to the prehybridization solutions listed above. Where the probe comprises double stranded DNA, it is denatured before addition to the hybridization solution. The filter is contacted with the hybridization solution for a sufficient period of time to allow the probe to hybridize to cDNAs or genomic DNAs containing sequences complementary thereto or homologous thereto. For probes over 200 nucleotides in length, the hybridization may be carried out at 15-25 C below the Tm. For shorter probes, such as oligonucleotide probes, the hybridization may be conducted at 5-10 C below the Tm. Typically, for hybridizations in 6×SSC, the hybridization is conducted at approximately 68 C. Usually, for hybridizations in 50% formamide containing solutions, the hybridization is conducted at approximately 42 C.
Inhibiting Expression of Transaminases and/or Oxidoreductases
The invention provides nucleic acids complementary to (e.g., antisense sequences to) the nucleic acids of the invention, e.g., transferase-, e.g., transaminase-, e.g., d-amino-acid transferase-, and/or oxidoreductase-, e.g., dehydrogenase-, e.g., d-amino-acid dehydrogenase-encoding nucleic acids. In alternative embodiments antisense sequences of the invention are capable of inhibiting the transport, splicing or transcription of transferase-, e.g., transaminase-, e.g., d-amino-acid transferase-, and/or oxidoreductase-, e.g., dehydrogenase-, e.g., d-amino-acid dehydrogenase-encoding genes. The inhibition can be effected through the targeting of genomic DNA or messenger RNA. The transcription or function of targeted nucleic acid can be inhibited, for example, by hybridization and/or cleavage. In alternative embodiments inhibitors provided by the present invention includes oligonucleotides which are able to either bind a transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase gene or message, in either case preventing or inhibiting the production or function of a transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase. The association can be through sequence specific hybridization. Another useful class of inhibitors includes oligonucleotides which cause inactivation or cleavage of a transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase message. The oligonucleotide can have enzyme activity which causes such cleavage, such as ribozymes. The oligonucleotide can be chemically modified or conjugated to an enzyme or composition capable of cleaving the complementary nucleic acid. A pool of many different such oligonucleotides can be screened for those with the desired activity. Thus, the invention provides various compositions for the inhibition of transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase expression on a nucleic acid and/or protein level, e.g., antisense, iRNA and ribozymes comprising transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase sequences of the invention and the anti-transferase, e.g., anti-transaminase, e.g., anti-d-amino-acid transferase, and/or anti-oxidoreductase, e.g., anti-dehydrogenase, e.g., anti-d-amino-acid dehydrogenase antibodies of the invention.
The compositions of the invention for the inhibition of transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase expression (e.g., antisense, iRNA, microRNA, ribozymes, antibodies) can be used as pharmaceutical (drug) compositions.
Antisense Oligonucleotides
The invention provides antisense oligonucleotides capable of binding a transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase message which can inhibit, for example, transferase and/or dehydrogenase activity by targeting mRNA. Strategies for designing antisense oligonucleotides are well described in the scientific and patent literature, and the skilled artisan can design such transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase oligonucleotides using the novel reagents of the invention. For example, gene walking/RNA mapping protocols to screen for effective antisense oligonucleotides are well known in the art, see, e.g., Ho (2000) Methods Enzymol. 314:168-183, describing an RNA mapping assay, which is based on standard molecular techniques to provide an easy and reliable method for potent antisense sequence selection. See also Smith (2000) Eur. J. Pharm. Sci. 11:191-198.
Naturally occurring nucleic acids are used as antisense oligonucleotides. The antisense oligonucleotides can be of any length; for example, in alternative aspects, the antisense oligonucleotides are between about 5 to 100, about 10 to 80, about 15 to 60, about 18 to 40. The optimal length can be determined by routine screening. The antisense oligonucleotides can be present at any concentration. The optimal concentration can be determined by routine screening. A wide variety of synthetic, non-naturally occurring nucleotide and nucleic acid analogues are known which can address this potential problem. For example, peptide nucleic acids (PNAs) containing non-ionic backbones, such as N-(2-aminoethyl) glycine units can be used. Antisense oligonucleotides having phosphorothioate linkages can also be used, as described in WO 97/03211; WO 96/39154; Mata (1997) Toxicol Appl Pharmacol 144:189-197; Antisense Therapeutics, ed. Agrawal (Humana Press, Totowa, N.J., 1996). Antisense oligonucleotides having synthetic DNA backbone analogues provided by the invention can also include phosphoro-dithioate, methylphosphonate, phosphoramidate, alkyl phosphotriester, sulfamate, 3′-thioacetal, methylene(methylimino), 3′-N-carbamate, and morpholino carbamate nucleic acids, as described above.
Combinatorial chemistry methodology can be used to create vast numbers of oligonucleotides that can be rapidly screened for specific oligonucleotides that have appropriate binding affinities and specificities toward any target, such as the sense and antisense transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase sequences of the invention (see, e.g., Gold (1995) J. of Biol. Chem. 270:13581-13584).
Inhibitory Ribozymes
The invention provides ribozymes capable of binding a transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase message. These ribozymes can inhibit transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase activity by, e.g., targeting mRNA. Strategies for designing ribozymes and selecting the transferase-, e.g., transaminase-, e.g., d-amino-acid transferase-, and/or oxidoreductase-, e.g., dehydrogenase-, e.g., d-amino-acid dehydrogenase-specific antisense sequence for targeting are well described in the scientific and patent literature, and the skilled artisan can design such ribozymes using the novel reagents (e.g., nucleic acids) of the invention. Ribozymes act by binding to a target RNA through the target RNA binding portion of a ribozyme which is held in close proximity to an enzymatic portion of the RNA that cleaves the target RNA. Thus, the ribozyme recognizes and binds a target RNA through complementary base-pairing, and once bound to the correct site, acts enzymatically to cleave and inactivate the target RNA. Cleavage of a target RNA in such a manner will destroy its ability to direct synthesis of an encoded protein if the cleavage occurs in the coding sequence. After a ribozyme has bound and cleaved its RNA target, it can be released from that RNA to bind and cleave new targets repeatedly.
In some circumstances, the enzymatic nature of a ribozyme can be advantageous over other technologies, such as antisense technology (where a nucleic acid molecule simply binds to a nucleic acid target to block its transcription, translation or association with another molecule) as the effective concentration of ribozyme necessary to effect a therapeutic treatment can be lower than that of an antisense oligonucleotide. This potential advantage reflects the ability of the ribozyme to act enzymatically. Thus, a single ribozyme molecule is able to cleave many molecules of target RNA. In addition, a ribozyme is typically a highly specific inhibitor, with the specificity of inhibition depending not only on the base pairing mechanism of binding, but also on the mechanism by which the molecule inhibits the expression of the RNA to which it binds. That is, the inhibition is caused by cleavage of the RNA target and so specificity is defined as the ratio of the rate of cleavage of the targeted RNA over the rate of cleavage of non-targeted RNA. This cleavage mechanism is dependent upon factors additional to those involved in base pairing. Thus, the specificity of action of a ribozyme can be greater than that of antisense oligonucleotide binding the same RNA site.
The ribozyme of the invention, e.g., an enzymatic ribozyme RNA molecule, can be formed in a hammerhead motif, a hairpin motif, as a hepatitis delta virus motif, a group I intron motif and/or an RNaseP-like RNA in association with an RNA guide sequence. Examples of hammerhead motifs are described by, e.g., Rossi (1992) Aids Research and Human Retroviruses 8:183; hairpin motifs by Hampel (1989) Biochemistry 28:4929, and Hampel (1990) Nuc. Acids Res. 18:299; the hepatitis delta virus motif by Perrotta (1992) Biochemistry 31:16; the RNaseP motif by Guerrier-Takada (1983) Cell 35:849; and the group I intron by Cech U.S. Pat. No. 4,987,071. The recitation of these specific motifs is not intended to be limiting. Those skilled in the art will recognize that a ribozyme of the invention, e.g., an enzymatic RNA molecule of this invention, can have a specific substrate binding site complementary to one or more of the target gene RNA regions. A ribozyme of the invention can have a nucleotide sequence within or surrounding that substrate binding site which imparts an RNA cleaving activity to the molecule.
RNA Interference (RNAi)
In one aspect, the invention provides an RNA inhibitory molecule, a so-called “RNAi” molecule, comprising a transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase enzyme sequence of the invention. The RNAi molecule can comprise a double-stranded RNA (dsRNA) molecule, e.g., an siRNA, a microRNA (miRNA) and/or short hairpin RNA (shRNA) molecules. The RNAi molecule, e.g., siRNA (small inhibitory RNA) can inhibit expression of a transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase enzyme gene, and/or miRNA (micro RNA) to inhibit translation of a transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase message. In one aspect, the RNAi molecule, e.g., siRNA and/or miRNA, is about 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29 or more duplex nucleotides in length. While the invention is not limited by any particular mechanism of action, the RNAi can enter a cell and cause the degradation of a single-stranded RNA (ssRNA) of similar or identical sequences, including endogenous mRNAs. When a cell is exposed to double-stranded RNA (dsRNA), mRNA from the homologous gene is selectively degraded by a process called RNA interference (RNAi). A possible basic mechanism behind RNAi is the breaking of a double-stranded RNA (dsRNA) matching a specific gene sequence into short pieces called short interfering RNA, which trigger the degradation of mRNA that matches its sequence. In one aspect, the RNAi's of the invention are used in gene-silencing therapeutics, see, e.g., Shuey (2002) Drug Discov. Today 7:1040-1046. In one aspect, the invention provides methods to selectively degrade RNA using the RNAi's molecules, e.g., siRNA and/or miRNA, of the invention. The process may be practiced in vitro, ex vivo or in vivo. In one aspect, the RNAi molecules of the invention can be used to generate a loss-of-function mutation in a cell, an organ or an animal.
In one aspect, intracellular introduction of the RNAi is by internalization of a target cell specific ligand bonded to an RNA binding protein comprising an RNAi (e.g., microRNA) is adsorbed. The ligand is specific to a unique target cell surface antigen. The ligand can be spontaneously internalized after binding to the cell surface antigen. If the unique cell surface antigen is not naturally internalized after binding to its ligand, internalization can be promoted by the incorporation of an arginine-rich peptide, or other membrane permeable peptide, into the structure of the ligand or RNA binding protein or attachment of such a peptide to the ligand or RNA binding protein. See, e.g., U.S. Patent App. Pub. Nos. 20060030003; 20060025361; 20060019286; 20060019258. In one aspect, the invention provides lipid-based formulations for delivering, e.g., introducing nucleic acids of the invention as nucleic acid-lipid particles comprising an RNAi molecule to a cell, see e.g., U.S. Patent App. Pub. No. 20060008910.
Methods for making and using RNAi molecules, e.g., siRNA and/or miRNA, for selectively degrade RNA are well known in the art, see, e.g., U.S. Pat. Nos. 6,506,559; 6,511,824; 6,515,109; 6,489,127.
Modification of Nucleic Acids
The invention provides methods of generating variants of the nucleic acids of the invention, e.g., those encoding a transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase. These methods can be repeated or used in various combinations to generate transferases, e.g., transaminases, e.g., d-amino-acid transferases, and/or oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases having an altered or different activity or an altered or different stability from that of a transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase encoded by the template nucleic acid. These methods also can be repeated or used in various combinations, e.g., to generate variations in gene/message expression, message translation or message stability. In another aspect, the genetic composition of a cell is altered by, e.g., modification of a homologous gene ex vivo, followed by its reinsertion into the cell.
In alternative embodiments, a nucleic acid of the invention can be altered by any means. For example, random or stochastic methods, or, non-stochastic, or “directed evolution,” methods, see, e.g., U.S. Pat. No. 6,361,974. Methods for random mutation of genes are well known in the art, see, e.g., U.S. Pat. No. 5,830,696. For example, mutagens can be used to randomly mutate a gene. Mutagens include, e.g., ultraviolet light or gamma irradiation, or a chemical mutagen, e.g., mitomycin, nitrous acid, photoactivated psoralens, alone or in combination, to induce DNA breaks amenable to repair by recombination. Other chemical mutagens include, for example, sodium bisulfite, nitrous acid, hydroxylamine, hydrazine or formic acid. Other mutagens are analogues of nucleotide precursors, e.g., nitrosoguanidine, 5-bromouracil, 2-aminopurine, or acridine. These agents can be added to a PCR reaction in place of the nucleotide precursor thereby mutating the sequence. Intercalating agents such as proflavine, acriflavine, quinacrine and the like can also be used.
Any technique in molecular biology can be used, e.g., random PCR mutagenesis, see, e.g., Rice (1992) Proc. Natl. Acad. Sci. USA 89:5467-5471; or, combinatorial multiple cassette mutagenesis, see, e.g., Crameri (1995) Biotechniques 18:194-196. Alternatively, nucleic acids, e.g., genes, can be reassembled after random, or “stochastic,” fragmentation, see, e.g., U.S. Pat. Nos. 6,291,242; 6,287,862; 6,287,861; 5,955,358; 5,830,721; 5,824,514; 5,811,238; 5,605,793. In alternative aspects, modifications, additions or deletions are introduced by error-prone PCR, shuffling, oligonucleotide-directed mutagenesis, assembly PCR, sexual PCR mutagenesis, in vivo mutagenesis, cassette mutagenesis, recursive ensemble mutagenesis, exponential ensemble mutagenesis, site-specific mutagenesis, gene reassembly (e.g., GeneReassembly, see, e.g., U.S. Pat. No. 6,537,776), gene site saturation mutagenesis (GSSM), synthetic ligation reassembly (SLR), recombination, recursive sequence recombination, phosphothioate-modified DNA mutagenesis, uracil-containing template mutagenesis, gapped duplex mutagenesis, point mismatch repair mutagenesis, repair-deficient host strain mutagenesis, chemical mutagenesis, radiogenic mutagenesis, deletion mutagenesis, restriction-selection mutagenesis, restriction-purification mutagenesis, artificial gene synthesis, ensemble mutagenesis, chimeric nucleic acid multimer creation, and/or a combination of these and other methods.
The following publications describe a variety of recursive recombination procedures and/or methods which can be incorporated into the methods of the invention: Stemmer (1999) “Molecular breeding of viruses for targeting and other clinical properties” Tumor Targeting 4:1-4; Ness (1999) Nature Biotechnology 17:893-896; Chang (1999) “Evolution of a cytokine using DNA family shuffling” Nature Biotechnology 17:793-797; Minshull (1999) “Protein evolution by molecular breeding” Current Opinion in Chemical Biology 3:284-290; Christians (1999) “Directed evolution of thymidine kinase for AZT phosphorylation using DNA family shuffling” Nature Biotechnology 17:259-264; Crameri (1998) “DNA shuffling of a family of genes from diverse species accelerates directed evolution” Nature 391:288-291; Crameri (1997) “Molecular evolution of an arsenate detoxification pathway by DNA shuffling,” Nature Biotechnology 15:436-438; Zhang (1997) “Directed evolution of an effective fucosidase from a galactosidase by DNA shuffling and screening” Proc. Natl. Acad. Sci. USA 94:4504-4509; Patten et al. (1997) “Applications of DNA Shuffling to Pharmaceuticals and Vaccines” Current Opinion in Biotechnology 8:724-733; Crameri et al. (1996) “Construction and evolution of antibody-phage libraries by DNA shuffling” Nature Medicine 2:100-103; Gates et al. (1996) “Affinity selective isolation of ligands from peptide libraries through display on a lac repressor ‘headpiece dimer’” Journal of Molecular Biology 255:373-386; Stemmer (1996) “Sexual PCR and Assembly PCR” In: The Encyclopedia of Molecular Biology. VCH Publishers, New York. pp. 447-457; Crameri and Stemmer (1995) “Combinatorial multiple cassette mutagenesis creates all the permutations of mutant and wildtype cassettes” BioTechniques 18:194-195; Stemmer et al. (1995) “Single-step assembly of a gene and entire plasmid form large numbers of oligodeoxyribonucleotides” Gene, 164:49-53; Stemmer (1995) “The Evolution of Molecular Computation” Science 270: 1510; Stemmer (1995) “Searching Sequence Space” Bio/Technology 13:549-553; Stemmer (1994) “Rapid evolution of a protein in vitro by DNA shuffling” Nature 370:389-391; and Stemmer (1994) “DNA shuffling by random fragmentation and reassembly: In vitro recombination for molecular evolution.” Proc. Natl. Acad. Sci. USA 91:10747-10751.
Mutational methods of generating diversity include, for example, site-directed mutagenesis (Ling et al. (1997) “Approaches to DNA mutagenesis: an overview” Anal Biochem. 254(2): 157-178; Dale et al. (1996) “Oligonucleotide-directed random mutagenesis using the phosphorothioate method” Methods Mol. Biol. 57:369-374; Smith (1985) “In vitro mutagenesis” Ann Rev. Genet. 19:423-462; Botstein & Shortle (1985) “Strategies and applications of in vitro mutagenesis” Science 229:1193-1201; Carter (1986) “Site-directed mutagenesis” Biochem. J. 237:1-7; and Kunkel (1987) “The efficiency of oligonucleotide directed mutagenesis” in Nucleic Acids & Molecular Biology (Eckstein, F. and Lilley, D. M. J. eds., Springer Verlag, Berlin)); mutagenesis using uracil containing templates (Kunkel (1985) “Rapid and efficient site-specific mutagenesis without phenotypic selection” Proc. Natl. Acad. Sci. USA 82:488-492; Kunkel et al. (1987) “Rapid and efficient site-specific mutagenesis without phenotypic selection” Methods in Enzymol. 154, 367-382; and Bass et al. (1988) “Mutant Trp repressors with new DNA-binding specificities” Science 242:240-245); oligonucleotide-directed mutagenesis (Methods in Enzymol. 100: 468-500 (1983); Methods in Enzymol. 154: 329-350 (1987); Zoller (1982) “Oligonucleotide-directed mutagenesis using M13-derived vectors: an efficient and general procedure for the production of point mutations in any DNA fragment” Nucleic Acids Res. 10:6487-6500; Zoller & Smith (1983) “Oligonucleotide-directed mutagenesis of DNA fragments cloned into M13 vectors” Methods in Enzymol. 100:468-500; and Zoller (1987) Oligonucleotide-directed mutagenesis: a simple method using two oligonucleotide primers and a single-stranded DNA template” Methods in Enzymol. 154:329-350); phosphorothioate-modified DNA mutagenesis (Taylor (1985) “The use of phosphorothioate-modified DNA in restriction enzyme reactions to prepare nicked DNA” Nucl. Acids Res. 13: 8749-8764; Taylor (1985) “The rapid generation of oligonucleotide-directed mutations at high frequency using phosphorothioate-modified DNA” Nucl. Acids Res. 13: 8765-8787 (1985); Nakamaye (1986) “Inhibition of restriction endonuclease Nci I cleavage by phosphorothioate groups and its application to oligonucleotide-directed mutagenesis” Nucl. Acids Res. 14: 9679-9698; Sayers (1988) “Y-T Exonucleases in phosphorothioate-based oligonucleotide-directed mutagenesis” Nucl. Acids Res. 16:791-802; and Sayers et al. (1988) “Strand specific cleavage of phosphorothioate-containing DNA by reaction with restriction endonucleases in the presence of ethidium bromide” Nucl. Acids Res. 16: 803-814); mutagenesis using gapped duplex DNA (Kramer et al. (1984) “The gapped duplex DNA approach to oligonucleotide-directed mutation construction” Nucl. Acids Res. 12: 9441-9456; Kramer & Fritz (1987) Methods in Enzymol. “Oligonucleotide-directed construction of mutations via gapped duplex DNA” 154:350-367; Kramer (1988) “Improved enzymatic in vitro reactions in the gapped duplex DNA approach to oligonucleotide-directed construction of mutations” Nucl. Acids Res. 16: 7207; and Fritz (1988) “Oligonucleotide-directed construction of mutations: a gapped duplex DNA procedure without enzymatic reactions in vitro” Nucl. Acids Res. 16: 6987-6999).
Additional protocols that can be used to practice the invention include point mismatch repair (Kramer (1984) “Point Mismatch Repair” Cell 38:879-887), mutagenesis using repair-deficient host strains (Carter et al. (1985) “Improved oligonucleotide site-directed mutagenesis using M13 vectors” Nucl. Acids Res. 13: 4431-4443; and Carter (1987) “Improved oligonucleotide-directed mutagenesis using M13 vectors” Methods in Enzymol. 154: 382-403), deletion mutagenesis (Eghtedarzadeh (1986) “Use of oligonucleotides to generate large deletions” Nucl. Acids Res. 14: 5115), restriction-selection and restriction-selection and restriction-purification (Wells et al. (1986) “Importance of hydrogen-bond formation in stabilizing the transition state of subtilisin” Phil. Trans. R. Soc. Lond. A 317: 415-423), mutagenesis by total gene synthesis (Nambiar et al. (1984) “Total synthesis and cloning of a gene coding for the ribonuclease S protein” Science 223: 1299-1301; Sakamar and Khorana (1988) “Total synthesis and expression of a gene for the a-subunit of bovine rod outer segment guanine nucleotide-binding protein (transducin)” Nucl. Acids Res. 14: 6361-6372; Wells et al. (1985) “Cassette mutagenesis: an efficient method for generation of multiple mutations at defined sites” Gene 34:315-323; and Grundstrom et al. (1985) “Oligonucleotide-directed mutagenesis by microscale ‘shot-gun’ gene synthesis” Nucl. Acids Res. 13: 3305-3316), double-strand break repair (Mandecki (1986); Arnold (1993) “Protein engineering for unusual environments” Current Opinion in Biotechnology 4:450-455. “Oligonucleotide-directed double-strand break repair in plasmids of Escherichia coli: a method for site-specific mutagenesis” Proc. Natl. Acad. Sci. USA, 83:7177-7181). Additional details on many of the above methods can be found in Methods in Enzymology Volume 154, which also describes useful controls for trouble-shooting problems with various mutagenesis methods.
Protocols that can be used to practice the invention are described, e.g., in U.S. Pat. No. 5,605,793 to Stemmer (Feb. 25, 1997), “Methods for In Vitro Recombination;” U.S. Pat. No. 5,811,238 to Stemmer et al. (Sep. 22, 1998) “Methods for Generating Polynucleotides having Desired Characteristics by Iterative Selection and Recombination;” U.S. Pat. No. 5,830,721 to Stemmer et al. (Nov. 3, 1998), “DNA Mutagenesis by Random Fragmentation and Reassembly;” U.S. Pat. No. 5,834,252 to Stemmer, et al. (Nov. 10, 1998) “End-Complementary Polymerase Reaction;” U.S. Pat. No. 5,837,458 to Minshull, et al. (Nov. 17, 1998), “Methods and Compositions for Cellular and Metabolic Engineering;” WO 95/22625, Stemmer and Crameri, “Mutagenesis by Random Fragmentation and Reassembly;” WO 96/33207 by Stemmer and Lipschutz “End Complementary Polymerase Chain Reaction;” WO 97/20078 by Stemmer and Crameri “Methods for Generating Polynucleotides having Desired Characteristics by Iterative Selection and Recombination;” WO 97/35966 by Minshull and Stemmer, “Methods and Compositions for Cellular and Metabolic Engineering;” WO 99/41402 by Punnonen et al. “Targeting of Genetic Vaccine Vectors;” WO 99/41383 by Punnonen et al. “Antigen Library Immunization;” WO 99/41369 by Punnonen et al. “Genetic Vaccine Vector Engineering;” WO 99/41368 by Punnonen et al. “Optimization of Immunomodulatory Properties of Genetic Vaccines;” EP 752008 by Stemmer and Crameri, “DNA Mutagenesis by Random Fragmentation and Reassembly;” EP 0932670 by Stemmer “Evolving Cellular DNA Uptake by Recursive Sequence Recombination;” WO 99/23107 by Stemmer et al., “Modification of Virus Tropism and Host Range by Viral Genome Shuffling;” WO 99/21979 by Apt et al., “Human Papillomavirus Vectors;” WO 98/31837 by del Cardayre et al. “Evolution of Whole Cells and Organisms by Recursive Sequence Recombination;” WO 98/27230 by Patten and Stemmer, “Methods and Compositions for Polypeptide Engineering;” WO 98/27230 by Stemmer et al., “Methods for Optimization of Gene Therapy by Recursive Sequence Shuffling and Selection,” WO 00/00632, “Methods for Generating Highly Diverse Libraries,” WO 00/09679, “Methods for Obtaining in Vitro Recombined Polynucleotide Sequence Banks and Resulting Sequences,” WO 98/42832 by Arnold et al., “Recombination of Polynucleotide Sequences Using Random or Defined Primers,” WO 99/29902 by Arnold et al., “Method for Creating Polynucleotide and Polypeptide Sequences,” WO 98/41653 by Vind, “An in Vitro Method for Construction of a DNA Library,” WO 98/41622 by Borchert et al., “Method for Constructing a Library Using DNA Shuffling,” and WO 98/42727 by Pati and Zarling, “Sequence Alterations using Homologous Recombination.”
Protocols that can be used to practice the invention (providing details regarding various diversity generating methods) are described, e.g., in U.S. patent application Ser. No. 09/407,800, “SHUFFLING OF CODON ALTERED GENES” by Patten et al. filed Sep. 28, 1999; “EVOLUTION OF WHOLE CELLS AND ORGANISMS BY RECURSIVE SEQUENCE RECOMBINATION” by del Cardayre et al., U.S. Pat. No. 6,379,964; “OLIGONUCLEOTIDE MEDIATED NUCLEIC ACID RECOMBINATION” by Crameri et al., U.S. Pat. Nos. 6,319,714; 6,368,861; 6,376,246; 6,423,542; 6,426,224 and PCT/US00/01203; “USE OF CODON-VARIED OLIGONUCLEOTIDE SYNTHESIS FOR SYNTHETIC SHUFFLING” by Welch et al., U.S. Pat. No. 6,436,675; “METHODS FOR MAKING CHARACTER STRINGS, POLYNUCLEOTIDES & POLYPEPTIDES HAVING DESIRED CHARACTERISTICS” by Selifonov et al., filed Jan. 18, 2000, (PCT/US00/01202) and, e.g. “METHODS FOR MAKING CHARACTER STRINGS, POLYNUCLEOTIDES & POLYPEPTIDES HAVING DESIRED CHARACTERISTICS” by Selifonov et al., filed Jul. 18, 2000 (U.S. Ser. No. 09/618,579); “METHODS OF POPULATING DATA STRUCTURES FOR USE IN EVOLUTIONARY SIMULATIONS” by Selifonov and Stemmer, filed Jan. 18, 2000 (PCT/US00/01138); and “SINGLE-STRANDED NUCLEIC ACID TEMPLATE-MEDIATED RECOMBINATION AND NUCLEIC ACID FRAGMENT ISOLATION” by Affholter, filed Sep. 6, 2000 (U.S. Ser. No. 09/656,549); and U.S. Pat. Nos. 6,177,263; 6,153,410.
Non-stochastic, or “directed evolution,” methods include, e.g., saturation mutagenesis (GSSM), synthetic ligation reassembly (SLR), or a combination thereof are used to modify the nucleic acids of the invention to generate transferases, e.g., transaminases, e.g., d-amino-acid transferases, and/or oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases with new or altered properties (e.g., activity under highly acidic or alkaline conditions, high or low temperatures, and the like). Polypeptides encoded by the modified nucleic acids can be screened for an activity. Any testing modality or protocol can be used, e.g., using a capillary array platform. See, e.g., U.S. Pat. Nos. 6,361,974; 6,280,926; 5,939,250.
Gene Site Saturation Mutagenesis, or, GSSM
The invention also provides methods for making enzyme using Gene Site Saturation mutagenesis, or, GSSM, as described herein, and also in U.S. Pat. Nos. 6,171,820 and 6,579,258. In one aspect, codon primers containing a degenerate N,N,G/T sequence are used to introduce point mutations into a polynucleotide, e.g., a transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase or an antibody of the invention, so as to generate a set of progeny polypeptides in which a full range of single amino acid substitutions is represented at each amino acid position, e.g., an amino acid residue in an enzyme active site or ligand binding site targeted to be modified. These oligonucleotides can comprise a contiguous first homologous sequence, a degenerate N,N,G/T sequence, and, in one aspect, a second homologous sequence. The downstream progeny translational products from the use of such oligonucleotides include all possible amino acid changes at each amino acid site along the polypeptide, because the degeneracy of the N,N,G/T sequence includes codons for all 20 amino acids. In one aspect, one such degenerate oligonucleotide (comprised of, e.g., one degenerate N,N,G/T cassette) is used for subjecting each original codon in a parental polynucleotide template to a full range of codon substitutions. In another aspect, at least two degenerate cassettes are used—either in the same oligonucleotide or not, for subjecting at least two original codons in a parental polynucleotide template to a full range of codon substitutions. For example, more than one N,N,G/T sequence can be contained in one oligonucleotide to introduce amino acid mutations at more than one site. This plurality of N,N,G/T sequences can be directly contiguous, or separated by one or more additional nucleotide sequence(s). In another aspect, oligonucleotides serviceable for introducing additions and deletions can be used either alone or in combination with the codons containing an N,N,G/T sequence, to introduce any combination or permutation of amino acid additions, deletions, and/or substitutions.
In one aspect, simultaneous mutagenesis of two or more contiguous amino acid positions is done using an oligonucleotide that contains contiguous N,N,G/T triplets, i.e. a degenerate (N,N,G/T)n sequence. In another aspect, degenerate cassettes having less degeneracy than the N,N,G/T sequence are used. For example, it may be desirable in some instances to use (e.g. in an oligonucleotide) a degenerate triplet sequence comprised of only one N, where said N can be in the first second or third position of the triplet. Any other bases including any combinations and permutations thereof can be used in the remaining two positions of the triplet. Alternatively, it may be desirable in some instances to use (e.g. in an oligo) a degenerate N,N,N triplet sequence.
In one aspect, use of degenerate triplets (e.g., N,N,G/T triplets) allows for systematic and easy generation of a full range of possible natural amino acids (for a total of 20 amino acids) into each and every amino acid position in a polypeptide (in alternative aspects, the methods also include generation of less than all possible substitutions per amino acid residue, or codon, position). For example, for a 100 amino acid polypeptide, 2000 distinct species (i.e. 20 possible amino acids per position X 100 amino acid positions) can be generated. Through the use of an oligonucleotide or set of oligonucleotides containing a degenerate N,N,G/T triplet, 32 individual sequences can code for all 20 possible natural amino acids. Thus, in a reaction vessel in which a parental polynucleotide sequence is subjected to saturation mutagenesis using at least one such oligonucleotide, there are generated 32 distinct progeny polynucleotides encoding 20 distinct polypeptides. In contrast, the use of a non-degenerate oligonucleotide in site-directed mutagenesis leads to only one progeny polypeptide product per reaction vessel. Nondegenerate oligonucleotides can in one aspect be used in combination with degenerate primers disclosed; for example, nondegenerate oligonucleotides can be used to generate specific point mutations in a working polynucleotide. This provides one means to generate specific silent point mutations, point mutations leading to corresponding amino acid changes, and point mutations that cause the generation of stop codons and the corresponding expression of polypeptide fragments.
In one aspect, each saturation mutagenesis reaction vessel contains polynucleotides encoding at least 20 progeny polypeptide (e.g., transferases, e.g., transaminases, e.g., d-amino-acid transferases, and/or oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases) molecules such that all 20 natural amino acids are represented at the one specific amino acid position corresponding to the codon position mutagenized in the parental polynucleotide (other aspects use less than all 20 natural combinations). The 32-fold degenerate progeny polypeptides generated from each saturation mutagenesis reaction vessel can be subjected to clonal amplification (e.g. cloned into a suitable host, e.g., E. coli host, using, e.g., an expression vector) and subjected to expression screening. When an individual progeny polypeptide is identified by screening to display a favorable change in property (when compared to the parental polypeptide, such as increased transferase activity, e.g., transaminase activity, e.g., d-amino-acid transferase activity, and/or oxidoreductase activity, e.g., dehydrogenase activity, e.g., d-amino-acid dehydrogenase activity or a ω-transaminase activity under alkaline or acidic conditions), it can be sequenced to identify the correspondingly favorable amino acid substitution contained therein.
In one aspect, upon mutagenizing each and every amino acid position in a parental polypeptide using saturation mutagenesis as disclosed herein, favorable amino acid changes may be identified at more than one amino acid position. One or more new progeny molecules can be generated that contain a combination of all or part of these favorable amino acid substitutions. For example, if 2 specific favorable amino acid changes are identified in each of 3 amino acid positions in a polypeptide, the permutations include 3 possibilities at each position (no change from the original amino acid, and each of two favorable changes) and 3 positions. Thus, there are 3×3×3 or 27 total possibilities, including 7 that were previously examined—6 single point mutations (i.e. 2 at each of three positions) and no change at any position.
In yet another aspect, site-saturation mutagenesis can be used together with shuffling, chimerization, recombination and other mutagenizing processes, along with screening. This invention provides for the use of any mutagenizing process(es), including saturation mutagenesis, in an iterative manner. In one exemplification, the iterative use of any mutagenizing process(es) is used in combination with screening.
The invention also provides for the use of proprietary codon primers (containing a degenerate N,N,N sequence) to introduce point mutations into a polynucleotide, so as to generate a set of progeny polypeptides in which a full range of single amino acid substitutions is represented at each amino acid position (gene site saturation mutagenesis (GSSM)). The oligos used are comprised contiguously of a first homologous sequence, a degenerate N,N,N sequence and preferably but not necessarily a second homologous sequence. The downstream progeny translational products from the use of such oligos include all possible amino acid changes at each amino acid site along the polypeptide, because the degeneracy of the N,N,N sequence includes codons for all 20 amino acids.
In one aspect, one such degenerate oligo (comprised of one degenerate N,N,N cassette) is used for subjecting each original codon in a parental polynucleotide template to a full range of codon substitutions. In another aspect, at least two degenerate N,N,N cassettes are used—either in the same oligo or not, for subjecting at least two original codons in a parental polynucleotide template to a full range of codon substitutions. Thus, more than one N,N,N sequence can be contained in one oligo to introduce amino acid mutations at more than one site. This plurality of N,N,N sequences can be directly contiguous, or separated by one or more additional nucleotide sequence(s). In another aspect, oligos serviceable for introducing additions and deletions can be used either alone or in combination with the codons containing an N,N,N sequence, to introduce any combination or permutation of amino acid additions, deletions and/or substitutions.
In a particular exemplification, it is possible to simultaneously mutagenize two or more contiguous amino acid positions using an oligo that contains contiguous N,N,N triplets, i.e. a degenerate (N,N,N)n sequence.
In another aspect, the present invention provides for the use of degenerate cassettes having less degeneracy than the N,N,N sequence. For example, it may be desirable in some instances to use (e.g. in an oligo) a degenerate triplet sequence comprised of only one N, where the N can be in the first second or third position of the triplet. Any other bases including any combinations and permutations thereof can be used in the remaining two positions of the triplet. Alternatively, it may be desirable in some instances to use (e.g., in an oligo) a degenerate N,N,N triplet sequence, N,N,G/T, or an N,N, G/C triplet sequence.
It is appreciated, however, that the use of a degenerate triplet (such as N,N,G/T or an N,N, G/C triplet sequence) as disclosed in the instant invention is advantageous for several reasons. In one aspect, this invention provides a means to systematically and fairly easily generate the substitution of the full range of possible amino acids (for a total of 20 amino acids) into each and every amino acid position in a polypeptide. Thus, for a 100 amino acid polypeptide, the invention provides a way to systematically and fairly easily generate 2000 distinct species (i.e., 20 possible amino acids per position times 100 amino acid positions). It is appreciated that there is provided, through the use of an oligo containing a degenerate N,N,G/T or an N,N, G/C triplet sequence, 32 individual sequences that code for 20 possible amino acids. Thus, in a reaction vessel in which a parental polynucleotide sequence is subjected to saturation mutagenesis using one such oligo, there are generated 32 distinct progeny polynucleotides encoding 20 distinct polypeptides. In contrast, the use of a non-degenerate oligo in site-directed mutagenesis leads to only one progeny polypeptide product per reaction vessel.
This invention also provides for the use of nondegenerate oligos, which can in one aspect be used in combination with degenerate primers disclosed. It is appreciated that in some situations, it is advantageous to use nondegenerate oligos to generate specific point mutations in a working polynucleotide. This provides a means to generate specific silent point mutations, point mutations leading to corresponding amino acid changes and point mutations that cause the generation of stop codons and the corresponding expression of polypeptide fragments.
Thus, in one aspect of this invention, each saturation mutagenesis reaction vessel contains polynucleotides encoding at least 20 progeny polypeptide molecules such that all 20 amino acids are represented at the one specific amino acid position corresponding to the codon position mutagenized in the parental polynucleotide. The 32-fold degenerate progeny polypeptides generated from each saturation mutagenesis reaction vessel can be subjected to clonal amplification (e.g., cloned into a suitable E. coli host using an expression vector) and subjected to expression screening. When an individual progeny polypeptide is identified by screening to display a favorable change in property (when compared to the parental polypeptide), it can be sequenced to identify the correspondingly favorable amino acid substitution contained therein.
It is appreciated that upon mutagenizing each and every amino acid position in a parental polypeptide using saturation mutagenesis as disclosed herein, favorable amino acid changes may be identified at more than one amino acid position. One or more new progeny molecules can be generated that contain a combination of all or part of these favorable amino acid substitutions. For example, if 2 specific favorable amino acid changes are identified in each of 3 amino acid positions in a polypeptide, the permutations include 3 possibilities at each position (no change from the original amino acid and each of two favorable changes) and 3 positions. Thus, there are 3×3×3 or 27 total possibilities, including 7 that were previously examined—6 single point mutations (i.e., 2 at each of three positions) and no change at any position.
Thus, in a non-limiting exemplification, this invention provides for the use of saturation mutagenesis in combination with additional mutagenization processes, such as process where two or more related polynucleotides are introduced into a suitable host cell such that a hybrid polynucleotide is generated by recombination and reductive reassortment.
In addition to performing mutagenesis along the entire sequence of a gene, the instant invention provides that mutagenesis can be use to replace each of any number of bases in a polynucleotide sequence, wherein the number of bases to be mutagenized is preferably every integer from 15 to 100,000. Thus, instead of mutagenizing every position along a molecule, one can subject every or a discrete number of bases (preferably a subset totaling from 15 to 100,000) to mutagenesis. Preferably, a separate nucleotide is used for mutagenizing each position or group of positions along a polynucleotide sequence. A group of 3 positions to be mutagenized may be a codon. The mutations are preferably introduced using a mutagenic primer, containing a heterologous cassette, also referred to as a mutagenic cassette. Exemplary cassettes can have from 1 to 500 bases. Each nucleotide position in such heterologous cassettes be N, A, C, G, T, A/C, A/G, A/T, C/G, C/T, G/T, C/G/T, A/G/T, A/C/T, A/C/G, or E, where E is any base that is not A, C, G, or T (E can be referred to as a designer oligo).
In a general sense, saturation mutagenesis is comprised of mutagenizing a complete set of mutagenic cassettes (wherein each cassette is preferably about 1-500 bases in length) in defined polynucleotide sequence to be mutagenized (wherein the sequence to be mutagenized is preferably from about 15 to 100,000 bases in length). Thus, a group of mutations (ranging from 1 to 100 mutations) is introduced into each cassette to be mutagenized. A grouping of mutations to be introduced into one cassette can be different or the same from a second grouping of mutations to be introduced into a second cassette during the application of one round of saturation mutagenesis. Such groupings are exemplified by deletions, additions, groupings of particular codons and groupings of particular nucleotide cassettes.
Defined sequences to be mutagenized include a whole gene, pathway, cDNA, an entire open reading frame (ORF) and entire promoter, enhancer, repressor/transactivator, origin of replication, intron, operator, or any polynucleotide functional group. Generally, a “defined sequences” for this purpose may be any polynucleotide that a 15 base-polynucleotide sequence and polynucleotide sequences of lengths between 15 bases and 15,000 bases (this invention specifically names every integer in between). Considerations in choosing groupings of codons include types of amino acids encoded by a degenerate mutagenic cassette.
In one exemplification a grouping of mutations that can be introduced into a mutagenic cassette, this invention specifically provides for degenerate codon substitutions (using degenerate oligos) that code for 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19 and 20 amino acids at each position and a library of polypeptides encoded thereby.
Synthetic Ligation Reassembly (SLR)
The invention provides a non-stochastic gene modification system termed “synthetic ligation reassembly,” or simply “SLR,” a “directed evolution process,” to generate polypeptides, e.g., transferases, e.g., transaminases, e.g., d-amino-acid transferases, and/or oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases, or antibodies of the invention, with new or altered properties.
SLR is a method of ligating oligonucleotide fragments together non-stochastically. This method differs from stochastic oligonucleotide shuffling in that the nucleic acid building blocks are not shuffled, concatenated or chimerized randomly, but rather are assembled non-stochastically. See, e.g., U.S. Pat. Nos. 6,773,900; 6,740,506; 6,713,282; 6,635,449; 6,605,449; 6,537,776. In one aspect, SLR comprises: (a) providing a template polynucleotide, wherein the template polynucleotide comprises sequence encoding a homologous gene; (b) providing a plurality of building block polynucleotides, wherein the building block polynucleotides are designed to cross-over reassemble with the template polynucleotide at a predetermined sequence, and a building block polynucleotide comprises a sequence that is a variant of the homologous gene and a sequence homologous to the template polynucleotide flanking the variant sequence; (c) combining a building block polynucleotide with a template polynucleotide such that the building block polynucleotide cross-over reassembles with the template polynucleotide to generate polynucleotides comprising homologous gene sequence variations.
SLR does not depend on the presence of high levels of homology between polynucleotides to be rearranged. Thus, this method can be used to non-stochastically generate libraries (or sets) of progeny molecules comprised of over 10100 different chimeras. SLR can be used to generate libraries comprised of over 101000 different progeny chimeras. Thus, aspects of the present invention include non-stochastic methods of producing a set of finalized chimeric nucleic acid molecule shaving an overall assembly order that is chosen by design. This method includes the steps of generating by design a plurality of specific nucleic acid building blocks having serviceable mutually compatible ligatable ends, and assembling these nucleic acid building blocks, such that a designed overall assembly order is achieved.
The mutually compatible ligatable ends of the nucleic acid building blocks to be assembled are considered to be “serviceable” for this type of ordered assembly if they enable the building blocks to be coupled in predetermined orders. Thus, the overall assembly order in which the nucleic acid building blocks can be coupled is specified by the design of the ligatable ends. If more than one assembly step is to be used, then the overall assembly order in which the nucleic acid building blocks can be coupled is also specified by the sequential order of the assembly step(s). In one aspect, the annealed building pieces are treated with an enzyme, such as a ligase (e.g. T4 DNA ligase), to achieve covalent bonding of the building pieces.
In one aspect, the design of the oligonucleotide building blocks is obtained by analyzing a set of progenitor nucleic acid sequence templates that serve as a basis for producing a progeny set of finalized chimeric polynucleotides. These parental oligonucleotide templates thus serve as a source of sequence information that aids in the design of the nucleic acid building blocks that are to be mutagenized, e.g., chimerized or shuffled. In one aspect of this method, the sequences of a plurality of parental nucleic acid templates are aligned in order to select one or more demarcation points. The demarcation points can be located at an area of homology, and are comprised of one or more nucleotides. These demarcation points are preferably shared by at least two of the progenitor templates. The demarcation points can thereby be used to delineate the boundaries of oligonucleotide building blocks to be generated in order to rearrange the parental polynucleotides. The demarcation points identified and selected in the progenitor molecules serve as potential chimerization points in the assembly of the final chimeric progeny molecules. A demarcation point can be an area of homology (comprised of at least one homologous nucleotide base) shared by at least two parental polynucleotide sequences. Alternatively, a demarcation point can be an area of homology that is shared by at least half of the parental polynucleotide sequences, or, it can be an area of homology that is shared by at least two thirds of the parental polynucleotide sequences. Even more preferably a serviceable demarcation points is an area of homology that is shared by at least three fourths of the parental polynucleotide sequences, or, it can be shared by at almost all of the parental polynucleotide sequences. In one aspect, a demarcation point is an area of homology that is shared by all of the parental polynucleotide sequences.
In one aspect, a ligation reassembly process is performed exhaustively in order to generate an exhaustive library of progeny chimeric polynucleotides. In other words, all possible ordered combinations of the nucleic acid building blocks are represented in the set of finalized chimeric nucleic acid molecules. At the same time, in another aspect, the assembly order (i.e. the order of assembly of each building block in the 5′ to 3 sequence of each finalized chimeric nucleic acid) in each combination is by design (or non-stochastic) as described above. Because of the non-stochastic nature of this invention, the possibility of unwanted side products is greatly reduced.
In another aspect, the ligation reassembly method is performed systematically. For example, the method is performed in order to generate a systematically compartmentalized library of progeny molecules, with compartments that can be screened systematically, e.g. one by one. In other words this invention provides that, through the selective and judicious use of specific nucleic acid building blocks, coupled with the selective and judicious use of sequentially stepped assembly reactions, a design can be achieved where specific sets of progeny products are made in each of several reaction vessels. This allows a systematic examination and screening procedure to be performed. Thus, these methods allow a potentially very large number of progeny molecules to be examined systematically in smaller groups. Because of its ability to perform chimerizations in a manner that is highly flexible yet exhaustive and systematic as well, particularly when there is a low level of homology among the progenitor molecules, these methods provide for the generation of a library (or set) comprised of a large number of progeny molecules. Because of the non-stochastic nature of the instant ligation reassembly invention, the progeny molecules generated preferably comprise a library of finalized chimeric nucleic acid molecules having an overall assembly order that is chosen by design. The saturation mutagenesis and optimized directed evolution methods also can be used to generate different progeny molecular species. It is appreciated that the invention provides freedom of choice and control regarding the selection of demarcation points, the size and number of the nucleic acid building blocks, and the size and design of the couplings. It is appreciated, furthermore, that the requirement for intermolecular homology is highly relaxed for the operability of this invention. In fact, demarcation points can even be chosen in areas of little or no intermolecular homology. For example, because of codon wobble, i.e. the degeneracy of codons, nucleotide substitutions can be introduced into nucleic acid building blocks without altering the amino acid originally encoded in the corresponding progenitor template. Alternatively, a codon can be altered such that the coding for an originally amino acid is altered. This invention provides that such substitutions can be introduced into the nucleic acid building block in order to increase the incidence of intermolecular homologous demarcation points and thus to allow an increased number of couplings to be achieved among the building blocks, which in turn allows a greater number of progeny chimeric molecules to be generated.
Synthetic Gene Reassembly
In one aspect, the present invention provides a non-stochastic method termed synthetic gene reassembly (e.g., GeneReassembly, see, e.g., U.S. Pat. No. 6,537,776), which differs from stochastic shuffling in that the nucleic acid building blocks are not shuffled or concatenated or chimerized randomly, but rather are assembled non-stochastically.
The synthetic gene reassembly method does not depend on the presence of a high level of homology between polynucleotides to be shuffled. The invention can be used to non-stochastically generate libraries (or sets) of progeny molecules comprised of over 10100 different chimeras. Conceivably, synthetic gene reassembly can even be used to generate libraries comprised of over 101000 different progeny chimeras.
Thus, in one aspect, the invention provides a non-stochastic method of producing a set of finalized chimeric nucleic acid molecules having an overall assembly order that is chosen by design, which method is comprised of the steps of generating by design a plurality of specific nucleic acid building blocks having serviceable mutually compatible ligatable ends and assembling these nucleic acid building blocks, such that a designed overall assembly order is achieved.
In one aspect, synthetic gene reassembly comprises a method of: 1) preparing a progeny generation of molecule(s) (including a molecule comprising a polynucleotide sequence, e.g., a molecule comprising a polypeptide coding sequence), that is mutagenized to achieve at least one point mutation, addition, deletion, &/or chimerization, from one or more ancestral or parental generation template(s); 2) screening the progeny generation molecule(s), e.g., using a high throughput method, for at least one property of interest (such as an improvement in an enzyme activity); 3) in one aspect obtaining &/or cataloguing structural &/or and functional information regarding the parental &/or progeny generation molecules; and 4) in one aspect repeating any of steps 1) to 3). In one aspect, there is generated (e.g., from a parent polynucleotide template), in what is termed “codon site-saturation mutagenesis,” a progeny generation of polynucleotides, each having at least one set of up to three contiguous point mutations (i.e. different bases comprising a new codon), such that every codon (or every family of degenerate codons encoding the same amino acid) is represented at each codon position. Corresponding to, and encoded by, this progeny generation of polynucleotides, there is also generated a set of progeny polypeptides, each having at least one single amino acid point mutation. In a one aspect, there is generated, in what is termed “amino acid site-saturation mutagenesis”, one such mutant polypeptide for each of the 19 naturally encoded polypeptide-forming alpha-amino acid substitutions at each and every amino acid position along the polypeptide. This yields, for each and every amino acid position along the parental polypeptide, a total of 20 distinct progeny polypeptides including the original amino acid, or potentially more than 21 distinct progeny polypeptides if additional amino acids are used either instead of or in addition to the 20 naturally encoded amino acids
Thus, in another aspect, this approach is also serviceable for generating mutants containing, in addition to &/or in combination with the 20 naturally encoded polypeptide-forming alpha-amino acids, other rare &/or not naturally-encoded amino acids and amino acid derivatives. In yet another aspect, this approach is also serviceable for generating mutants by the use of, in addition to &/or in combination with natural or unaltered codon recognition systems of suitable hosts, altered, mutagenized, &/or designer codon recognition systems (such as in a host cell with one or more altered tRNA molecules.
In yet another aspect, this invention relates to recombination and more specifically to a method for preparing polynucleotides encoding a polypeptide by a method of in vivo reassortment of polynucleotide sequences containing regions of partial homology, assembling the polynucleotides to form at least one polynucleotide and screening the polynucleotides for the production of polypeptide(s) having a useful property.
In yet another aspect, this invention is serviceable for analyzing and cataloguing, with respect to any molecular property (e.g. an enzymatic activity) or combination of properties allowed by current technology, the effects of any mutational change achieved (including particularly saturation mutagenesis). Thus, a comprehensive method is provided for determining the effect of changing each amino acid in a parental polypeptide into each of at least 19 possible substitutions. This allows each amino acid in a parental polypeptide to be characterized and catalogued according to its spectrum of potential effects on a measurable property of the polypeptide.
In one aspect, an intron may be introduced into a chimeric progeny molecule by way of a nucleic acid building block. Introns often have consensus sequences at both termini in order to render them operational. In addition to enabling gene splicing, introns may serve an additional purpose by providing sites of homology to other nucleic acids to enable homologous recombination. For this purpose, and potentially others, it may be sometimes desirable to generate a large nucleic acid building block for introducing an intron. If the size is overly large easily generating by direct chemical synthesis of two single stranded oligos, such a specialized nucleic acid building block may also be generated by direct chemical synthesis of more than two single stranded oligos or by using a polymerase-based amplification reaction
The mutually compatible ligatable ends of the nucleic acid building blocks to be assembled are considered to be “serviceable” for this type of ordered assembly if they enable the building blocks to be coupled in predetermined orders. Thus, in one aspect, the overall assembly order in which the nucleic acid building blocks can be coupled is specified by the design of the ligatable ends and, if more than one assembly step is to be used, then the overall assembly order in which the nucleic acid building blocks can be coupled is also specified by the sequential order of the assembly step(s). In a one aspect of the invention, the annealed building pieces are treated with an enzyme, such as a ligase (e.g., T4 DNA ligase) to achieve covalent bonding of the building pieces.
Coupling can occur in a manner that does not make use of every nucleotide in a participating overhang. The coupling is particularly lively to survive (e.g. in a transformed host) if the coupling reinforced by treatment with a ligase enzyme to form what may be referred to as a “gap ligation” or a “gapped ligation”. This type of coupling can contribute to generation of unwanted background product(s), but it can also be used advantageously increase the diversity of the progeny library generated by the designed ligation reassembly. Certain overhangs are able to undergo self-coupling to form a palindromic coupling. A coupling is strengthened substantially if it is reinforced by treatment with a ligase enzyme. Lack of 5′ phosphates on these overhangs can be used advantageously to prevent this type of palindromic self-ligation. Accordingly, this invention provides that nucleic acid building blocks can be chemically made (or ordered) that lack a 5′ phosphate group. Alternatively, they can be removed, e.g. by treatment with a phosphatase enzyme, such as a calf intestinal alkaline phosphatase (CIAP), in order to prevent palindromic self-ligations in ligation reassembly processes.
In a another aspect, the design of nucleic acid building blocks is obtained upon analysis of the sequences of a set of progenitor nucleic acid templates that serve as a basis for producing a progeny set of finalized chimeric nucleic acid molecules. These progenitor nucleic acid templates thus serve as a source of sequence information that aids in the design of the nucleic acid building blocks that are to be mutagenized, i.e. chimerized or shuffled.
In one exemplification, the invention provides for the chimerization of a family of related genes and their encoded family of related products. In a particular exemplification, the encoded products are enzymes. The transferases, e.g., transaminases, e.g., d-amino-acid transferases, and/or oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases of the present invention can be mutagenized in accordance with the methods described herein.
Thus according to one aspect of the invention, the sequences of a plurality of progenitor nucleic acid templates (e.g., polynucleotides of The invention) are aligned in order to select one or more demarcation points, which demarcation points can be located at an area of homology. The demarcation points can be used to delineate the boundaries of nucleic acid building blocks to be generated. Thus, the demarcation points identified and selected in the progenitor molecules serve as potential chimerization points in the assembly of the progeny molecules.
Typically a serviceable demarcation point is an area of homology (comprised of at least one homologous nucleotide base) shared by at least two progenitor templates, but the demarcation point can be an area of homology that is shared by at least half of the progenitor templates, at least two thirds of the progenitor templates, at least three fourths of the progenitor templates and preferably at almost all of the progenitor templates. Even more preferably still a serviceable demarcation point is an area of homology that is shared by all of the progenitor templates.
In a one aspect, the gene reassembly process is performed exhaustively in order to generate an exhaustive library. In other words, all possible ordered combinations of the nucleic acid building blocks are represented in the set of finalized chimeric nucleic acid molecules. At the same time, the assembly order (i.e. the order of assembly of each building block in the 5′ to 3 sequence of each finalized chimeric nucleic acid) in each combination is by design (or non-stochastic). Because of the non-stochastic nature of the method, the possibility of unwanted side products is greatly reduced.
In another aspect, the method provides that the gene reassembly process is performed systematically, for example to generate a systematically compartmentalized library, with compartments that can be screened systematically, e.g., one by one. In other words the invention provides that, through the selective and judicious use of specific nucleic acid building blocks, coupled with the selective and judicious use of sequentially stepped assembly reactions, an experimental design can be achieved where specific sets of progeny products are made in each of several reaction vessels. This allows a systematic examination and screening procedure to be performed. Thus, it allows a potentially very large number of progeny molecules to be examined systematically in smaller groups.
Because of its ability to perform chimerizations in a manner that is highly flexible yet exhaustive and systematic as well, particularly when there is a low level of homology among the progenitor molecules, the instant invention provides for the generation of a library (or set) comprised of a large number of progeny molecules. Because of the non-stochastic nature of the instant gene reassembly invention, the progeny molecules generated preferably comprise a library of finalized chimeric nucleic acid molecules having an overall assembly order that is chosen by design. In a particularly aspect, such a generated library is comprised of greater than 103 to greater than 101000 different progeny molecular species.
In one aspect, a set of finalized chimeric nucleic acid molecules, produced as described is comprised of a polynucleotide encoding a polypeptide. According to one aspect, this polynucleotide is a gene, which may be a man-made gene. According to another aspect, this polynucleotide is a gene pathway, which may be a man-made gene pathway. The invention provides that one or more man-made genes generated by the invention may be incorporated into a man-made gene pathway, such as pathway operable in a eukaryotic organism (including a plant).
In another exemplification, the synthetic nature of the step in which the building blocks are generated allows the design and introduction of nucleotides (e.g., one or more nucleotides, which may be, for example, codons or introns or regulatory sequences) that can later be in one aspect removed in an in vitro process (e.g., by mutagenesis) or in an in vivo process (e.g., by utilizing the gene splicing ability of a host organism). It is appreciated that in many instances the introduction of these nucleotides may also be desirable for many other reasons in addition to the potential benefit of creating a serviceable demarcation point.
Thus, according to another aspect, the invention provides that a nucleic acid building block can be used to introduce an intron. Thus, the invention provides that functional introns may be introduced into a man-made gene of the invention. The invention also provides that functional introns may be introduced into a man-made gene pathway of the invention. Accordingly, the invention provides for the generation of a chimeric polynucleotide that is a man-made gene containing one (or more) artificially introduced intron(s).
Accordingly, the invention also provides for the generation of a chimeric polynucleotide that is a man-made gene pathway containing one (or more) artificially introduced intron(s). Preferably, the artificially introduced intron(s) are functional in one or more host cells for gene splicing much in the way that naturally-occurring introns serve functionally in gene splicing. The invention provides a process of producing man-made intron-containing polynucleotides to be introduced into host organisms for recombination and/or splicing.
A man-made gene produced using the invention can also serve as a substrate for recombination with another nucleic acid. Likewise, a man-made gene pathway produced using the invention can also serve as a substrate for recombination with another nucleic acid. In a one aspect, the recombination is facilitated by, or occurs at, areas of homology between the man-made, intron-containing gene and a nucleic acid, which serves as a recombination partner. In one aspect, the recombination partner may also be a nucleic acid generated by the invention, including a man-made gene or a man-made gene pathway. Recombination may be facilitated by or may occur at areas of homology that exist at the one (or more) artificially introduced intron(s) in the man-made gene.
The synthetic gene reassembly method of the invention utilizes a plurality of nucleic acid building blocks, each of which preferably has two ligatable ends. The two ligatable ends on each nucleic acid building block may be two blunt ends (i.e. each having an overhang of zero nucleotides), or preferably one blunt end and one overhang, or more preferably still two overhangs.
A useful overhang for this purpose may be a 3′ overhang or a 5′ overhang. Thus, a nucleic acid building block may have a 3′ overhang or alternatively a 5′ overhang or alternatively two 3′ overhangs or alternatively two 5′ overhangs. The overall order in which the nucleic acid building blocks are assembled to form a finalized chimeric nucleic acid molecule is determined by purposeful experimental design and is not random.
In one aspect, a nucleic acid building block is generated by chemical synthesis of two single-stranded nucleic acids (also referred to as single-stranded oligos) and contacting them so as to allow them to anneal to form a double-stranded nucleic acid building block.
A double-stranded nucleic acid building block can be of variable size. The sizes of these building blocks can be small or large. Exemplary sizes for building block range from 1 base pair (not including any overhangs) to 100,000 base pairs (not including any overhangs). Other exemplary size ranges are also provided, which have lower limits of from 1 by to 10,000 by (including every integer value in between) and upper limits of from 2 by to 100,000 bp (including every integer value in between).
Many methods exist by which a double-stranded nucleic acid building block can be generated that is serviceable for the invention; and these are known in the art and can be readily performed by the skilled artisan.
According to one aspect, a double-stranded nucleic acid building block is generated by first generating two single stranded nucleic acids and allowing them to anneal to form a double-stranded nucleic acid building block. The two strands of a double-stranded nucleic acid building block may be complementary at every nucleotide apart from any that form an overhang; thus containing no mismatches, apart from any overhang(s). According to another aspect, the two strands of a double-stranded nucleic acid building block are complementary at fewer than every nucleotide apart from any that form an overhang. Thus, according to this aspect, a double-stranded nucleic acid building block can be used to introduce codon degeneracy. The codon degeneracy can be introduced using the site-saturation mutagenesis described herein, using one or more N,N,G/T cassettes or alternatively using one or more N,N,N cassettes.
The in vivo recombination method of the invention can be performed blindly on a pool of unknown hybrids or alleles of a specific polynucleotide or sequence. However, it is not necessary to know the actual DNA or RNA sequence of the specific polynucleotide.
The approach of using recombination within a mixed population of genes can be useful for the generation of any useful proteins, for example, interleukin I, antibodies, tPA and growth hormone. This approach may be used to generate proteins having altered specificity or activity. The approach may also be useful for the generation of hybrid nucleic acid sequences, for example, promoter regions, introns, exons, enhancer sequences, 31 untranslated regions or 51 untranslated regions of genes. Thus this approach may be used to generate genes having increased rates of expression. This approach may also be useful in the study of repetitive DNA sequences. Finally, this approach may be useful to mutate ribozymes or aptamers.
In one aspect the invention described herein is directed to the use of repeated cycles of reductive reassortment, recombination and selection which allow for the directed molecular evolution of highly complex linear sequences, such as DNA, RNA or proteins thorough recombination.
Optimized Directed Evolution System
The invention provides a non-stochastic gene modification system termed “optimized directed evolution system” to generate polypeptides, e.g., transferases, e.g., transaminases, e.g., d-amino-acid transferases, and/or oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases, or antibodies of the invention, with new or altered properties. Optimized directed evolution is directed to the use of repeated cycles of reductive reassortment, recombination and selection that allow for the directed molecular evolution of nucleic acids through recombination. Optimized directed evolution allows generation of a large population of evolved chimeric sequences, wherein the generated population is significantly enriched for sequences that have a predetermined number of crossover events.
A crossover event is a point in a chimeric sequence where a shift in sequence occurs from one parental variant to another parental variant. Such a point is normally at the juncture of where oligonucleotides from two parents are ligated together to form a single sequence. This method allows calculation of the correct concentrations of oligonucleotide sequences so that the final chimeric population of sequences is enriched for the chosen number of crossover events. This provides more control over choosing chimeric variants having a predetermined number of crossover events.
In addition, this method provides a convenient means for exploring a tremendous amount of the possible protein variant space in comparison to other systems. Previously, if one generated, for example, 1013 chimeric molecules during a reaction, it would be extremely difficult to test such a high number of chimeric variants for a particular activity. Moreover, a significant portion of the progeny population would have a very high number of crossover events which resulted in proteins that were less likely to have increased levels of a particular activity. By using these methods, the population of chimerics molecules can be enriched for those variants that have a particular number of crossover events. Thus, although one can still generate 1013 chimeric molecules during a reaction, each of the molecules chosen for further analysis most likely has, for example, only three crossover events. Because the resulting progeny population can be skewed to have a predetermined number of crossover events, the boundaries on the functional variety between the chimeric molecules is reduced. This provides a more manageable number of variables when calculating which oligonucleotide from the original parental polynucleotides might be responsible for affecting a particular trait.
One method for creating a chimeric progeny polynucleotide sequence is to create oligonucleotides corresponding to fragments or portions of each parental sequence. Each oligonucleotide preferably includes a unique region of overlap so that mixing the oligonucleotides together results in a new variant that has each oligonucleotide fragment assembled in the correct order. Additional information can also be found, e.g., in U.S. Ser. No. 09/332,835; U.S. Pat. No. 6,361,974.
The number of oligonucleotides generated for each parental variant bears a relationship to the total number of resulting crossovers in the chimeric molecule that is ultimately created. For example, three parental nucleotide sequence variants might be provided to undergo a ligation reaction in order to find a chimeric variant having, for example, greater activity at high temperature. As one example, a set of 50 oligonucleotide sequences can be generated corresponding to each portions of each parental variant. Accordingly, during the ligation reassembly process there could be up to 50 crossover events within each of the chimeric sequences. The probability that each of the generated chimeric polynucleotides will contain oligonucleotides from each parental variant in alternating order is very low. If each oligonucleotide fragment is present in the ligation reaction in the same molar quantity it is likely that in some positions oligonucleotides from the same parental polynucleotide will ligate next to one another and thus not result in a crossover event. If the concentration of each oligonucleotide from each parent is kept constant during any ligation step in this example, there is a 1⁄3 chance (assuming 3 parents) that an oligonucleotide from the same parental variant will ligate within the chimeric sequence and produce no crossover.
Accordingly, a probability density function (PDF) can be determined to predict the population of crossover events that are likely to occur during each step in a ligation reaction given a set number of parental variants, a number of oligonucleotides corresponding to each variant, and the concentrations of each variant during each step in the ligation reaction. The statistics and mathematics behind determining the PDF is described below. By utilizing these methods, one can calculate such a probability density function, and thus enrich the chimeric progeny population for a predetermined number of crossover events resulting from a particular ligation reaction. Moreover, a target number of crossover events can be predetermined, and the system then programmed to calculate the starting quantities of each parental oligonucleotide during each step in the ligation reaction to result in a probability density function that centers on the predetermined number of crossover events. These methods are directed to the use of repeated cycles of reductive reassortment, recombination and selection that allow for the directed molecular evolution of a nucleic acid encoding a polypeptide through recombination. This system allows generation of a large population of evolved chimeric sequences, wherein the generated population is significantly enriched for sequences that have a predetermined number of crossover events. A crossover event is a point in a chimeric sequence where a shift in sequence occurs from one parental variant to another parental variant. Such a point is normally at the juncture of where oligonucleotides from two parents are ligated together to form a single sequence. The method allows calculation of the correct concentrations of oligonucleotide sequences so that the final chimeric population of sequences is enriched for the chosen number of crossover events. This provides more control over choosing chimeric variants having a predetermined number of crossover events.
In addition, these methods provide a convenient means for exploring a tremendous amount of the possible protein variant space in comparison to other systems. By using the methods described herein, the population of chimerics molecules can be enriched for those variants that have a particular number of crossover events. Thus, although one can still generate 1013 chimeric molecules during a reaction, each of the molecules chosen for further analysis most likely has, for example, only three crossover events. Because the resulting progeny population can be skewed to have a predetermined number of crossover events, the boundaries on the functional variety between the chimeric molecules is reduced. This provides a more manageable number of variables when calculating which oligonucleotide from the original parental polynucleotides might be responsible for affecting a particular trait.
In one aspect, the method creates a chimeric progeny polynucleotide sequence by creating oligonucleotides corresponding to fragments or portions of each parental sequence. Each oligonucleotide preferably includes a unique region of overlap so that mixing the oligonucleotides together results in a new variant that has each oligonucleotide fragment assembled in the correct order. See also U.S. Ser. No. 09/332,835.
Determining Crossover Events
Aspects of the invention include a system and software that receive a desired crossover probability density function (PDF), the number of parent genes to be reassembled, and the number of fragments in the reassembly as inputs. The output of this program is a “fragment PDF” that can be used to determine a recipe for producing reassembled genes, and the estimated crossover PDF of those genes. The processing described herein is preferably performed in MATLABTM (The Mathworks, Natick, Mass.) a programming language and development environment for technical computing.
Iterative Processes
In practicing the invention, these processes can be iteratively repeated. For example, a nucleic acid (or, the nucleic acid) responsible for an altered or new transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase phenotype is identified, re-isolated, again modified, re-tested for activity. This process can be iteratively repeated until a desired phenotype is engineered. For example, an entire biochemical anabolic or catabolic pathway can be engineered into a cell, including, e.g., transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase activity.
Similarly, if it is determined that a particular oligonucleotide has no affect at all on the desired trait (e.g., a new transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase phenotype), it can be removed as a variable by synthesizing larger parental oligonucleotides that include the sequence to be removed. Since incorporating the sequence within a larger sequence prevents any crossover events, there will no longer be any variation of this sequence in the progeny polynucleotides. This iterative practice of determining which oligonucleotides are most related to the desired trait, and which are unrelated, allows more efficient exploration all of the possible protein variants that might be provide a particular trait or activity.
In Vivo Shuffling
In vivo shuffling of molecules is use in methods of the invention that provide variants of polypeptides of the invention, e.g., antibodies, transferases, e.g., transaminases, e.g., d-amino-acid transferases, and/or oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases, and the like. In vivo shuffling can be performed utilizing the natural property of cells to recombine multimers. While recombination in vivo has provided the major natural route to molecular diversity, genetic recombination remains a relatively complex process that involves 1) the recognition of homologies; 2) strand cleavage, strand invasion, and metabolic steps leading to the production of recombinant chiasma; and finally 3) the resolution of chiasma into discrete recombined molecules. The formation of the chiasma requires the recognition of homologous sequences. In another aspect, the invention includes a method for producing a hybrid polynucleotide from at least a first polynucleotide and a second polynucleotide. The invention can be used to produce a hybrid polynucleotide by introducing at least a first polynucleotide and a second polynucleotide which share at least one region of partial sequence homology into a suitable host cell. The regions of partial sequence homology promote processes which result in sequence reorganization producing a hybrid polynucleotide. The term “hybrid polynucleotide”, as used herein, is any nucleotide sequence which results from the method of the present invention and contains sequence from at least two original polynucleotide sequences. Such hybrid polynucleotides can result from intermolecular recombination events which promote sequence integration between DNA molecules. In addition, such hybrid polynucleotides can result from intramolecular reductive reassortment processes which utilize repeated sequences to alter a nucleotide sequence within a DNA molecule.
In vivo reassortment is focused on “inter-molecular” processes collectively referred to as “recombination” which in bacteria, is generally viewed as a “RecA-dependent” phenomenon. The invention can rely on recombination processes of a host cell to recombine and re-assort sequences, or the cells' ability to mediate reductive processes to decrease the complexity of quasi-repeated sequences in the cell by deletion. This process of “reductive reassortment” occurs by an “intra-molecular”, RecA-independent process.
Therefore, in another aspect of the invention, novel polynucleotides can be generated by the process of reductive reassortment. The method involves the generation of constructs containing consecutive sequences (original encoding sequences), their insertion into an appropriate vector and their subsequent introduction into an appropriate host cell. The reassortment of the individual molecular identities occurs by combinatorial processes between the consecutive sequences in the construct possessing regions of homology, or between quasi-repeated units. The reassortment process recombines and/or reduces the complexity and extent of the repeated sequences and results in the production of novel molecular species. Various treatments may be applied to enhance the rate of reassortment. These could include treatment with ultra-violet light, or DNA damaging chemicals and/or the use of host cell lines displaying enhanced levels of “genetic instability”. Thus the reassortment process may involve homologous recombination or the natural property of quasi-repeated sequences to direct their own evolution.
Repeated or “quasi-repeated” sequences play a role in genetic instability. In the present invention, “quasi-repeats” are repeats that are not restricted to their original unit structure. Quasi-repeated units can be presented as an array of sequences in a construct; consecutive units of similar sequences. Once ligated, the junctions between the consecutive sequences become essentially invisible and the quasi-repetitive nature of the resulting construct is now continuous at the molecular level. The deletion process the cell performs to reduce the complexity of the resulting construct operates between the quasi-repeated sequences. The quasi-repeated units provide a practically limitless repertoire of templates upon which slippage events can occur. The constructs containing the quasi-repeats thus effectively provide sufficient molecular elasticity that deletion (and potentially insertion) events can occur virtually anywhere within the quasi-repetitive units.
When the quasi-repeated sequences are all ligated in the same orientation, for instance head to tail or vice versa, the cell cannot distinguish individual units. Consequently, the reductive process can occur throughout the sequences. In contrast, when for example, the units are presented head to head, rather than head to tail, the inversion delineates the endpoints of the adjacent unit so that deletion formation will favor the loss of discrete units. Thus, it is preferable with the present method that the sequences are in the same orientation. Random orientation of quasi-repeated sequences will result in the loss of reassortment efficiency, while consistent orientation of the sequences will offer the highest efficiency. However, while having fewer of the contiguous sequences in the same orientation decreases the efficiency, it may still provide sufficient elasticity for the effective recovery of novel molecules. Constructs can be made with the quasi-repeated sequences in the same orientation to allow higher efficiency.
Sequences can be assembled in a head to tail orientation using any of a variety of methods, including the following:

    
    
        a) Primers that include a poly-A head and poly-T tail which when made single-stranded would provide orientation can be utilized. This is accomplished by having the first few bases of the primers made from RNA and hence easily removed RNAseH.
        b) Primers that include unique restriction cleavage sites can be utilized. Multiple sites, a battery of unique sequences and repeated synthesis and ligation steps would be required.
        c) The inner few bases of the primer could be thiolated and an exonuclease used to produce properly tailed molecules.
    
    


The recovery of the re-assorted sequences relies on the identification of cloning vectors with a reduced repetitive index (RI). The re-assorted encoding sequences can then be recovered by amplification. The products are re-cloned and expressed. The recovery of cloning vectors with reduced RI can be affected by:

    1) The use of vectors only stably maintained when the construct is reduced in complexity.
    2) The physical recovery of shortened vectors by physical procedures. In this case, the cloning vector would be recovered using standard plasmid isolation procedures and size fractionated on either an agarose gel, or column with a low molecular weight cut off utilizing standard procedures.
    3) The recovery of vectors containing interrupted genes which can be selected when insert size decreases.
    4) The use of direct selection techniques with an expression vector and the appropriate selection.


Encoding sequences (for example, genes) from related organisms may demonstrate a high degree of homology and encode quite diverse protein products. These types of sequences are particularly useful in the present invention as quasi-repeats. However, while the examples illustrated below demonstrate the reassortment of nearly identical original encoding sequences (quasi-repeats), this process is not limited to such nearly identical repeats.
The following example demonstrates a method of the invention. Encoding nucleic acid sequences (quasi-repeats) derived from three (3) unique species are described. Each sequence encodes a protein with a distinct set of properties. Each of the sequences differs by a single or a few base pairs at a unique position in the sequence. The quasi-repeated sequences are separately or collectively amplified and ligated into random assemblies such that all possible permutations and combinations are available in the population of ligated molecules. The number of quasi-repeat units can be controlled by the assembly conditions. The average number of quasi-repeated units in a construct is defined as the repetitive index (RI).
Once formed, the constructs may, or may not be size fractionated on an agarose gel according to published protocols, inserted into a cloning vector and transfected into an appropriate host cell. The cells are then propagated and “reductive reassortment” is effected. The rate of the reductive reassortment process may be stimulated by the introduction of DNA damage if desired. Whether the reduction in RI is mediated by deletion formation between repeated sequences by an “intra-molecular” mechanism, or mediated by recombination-like events through “inter-molecular” mechanisms is immaterial. The end result is a reassortment of the molecules into all possible combinations.
In one aspect (optionally), the method comprises the additional step of screening the library members of the shuffled pool to identify individual shuffled library members having the ability to bind or otherwise interact, or catalyze a particular reaction (e.g., such as catalytic domain of an enzyme) with a predetermined macromolecule, such as for example a proteinaceous receptor, an oligosaccharide, virion, or other predetermined compound or structure.
The polypeptides that are identified from such libraries can be used for therapeutic, diagnostic, research and related purposes (e.g., catalysts, solutes for increasing osmolarity of an aqueous solution and the like) and/or can be subjected to one or more additional cycles of shuffling and/or selection.
In another aspect, it is envisioned that prior to or during recombination or reassortment, polynucleotides generated by the method of the invention can be subjected to agents or processes which promote the introduction of mutations into the original polynucleotides. The introduction of such mutations would increase the diversity of resulting hybrid polynucleotides and polypeptides encoded therefrom. The agents or processes which promote mutagenesis can include, but are not limited to: (+)-CC-1065, or a synthetic analog such as (+)-CC-1065-(N3-Adenine (See Sun and Hurley, (1992); an N-acetylated or deacetylated 4′-fluro-4-aminobiphenyl adduct capable of inhibiting DNA synthesis (See, for example, van de Poll et al. (1992)); or a N-acetylated or deacetylated 4-aminobiphenyl adduct capable of inhibiting DNA synthesis (See also, van de Poll et al. (1992), pp. 751-758); trivalent chromium, a trivalent chromium salt, a polycyclic aromatic hydrocarbon (PAH) DNA adduct capable of inhibiting DNA replication, such as 7-bromomethyl-benz[a]anthracene (“BMA”), tris(2,3-dibromopropyl)phosphate (“Tris-BP”), 1,2-dibromo-3-chloropropane (“DBCP”), 2-bromoacrolein (2BA), benzo[a]pyrene-7,8-dihydrodiol-9-10-epoxide (“BPDE”), a platinum(II) halogen salt, N-hydroxy-2-amino-3-methylimidazo[4,5-f]-quinoline (“N-hydroxy-IQ”) and N-hydroxy-2-amino-1-methyl-6-phenylimidazo[4,5-f]-pyridine (“N-hydroxy-PhIP”). Exemplary means for slowing or halting PCR amplification consist of UV light (+)-CC-1065 and (+)-CC-1065-(N3-Adenine). Particularly encompassed means are DNA adducts or polynucleotides comprising the DNA adducts from the polynucleotides or polynucleotides pool, which can be released or removed by a process including heating the solution comprising the polynucleotides prior to further processing.
In another aspect the invention is directed to a method of producing recombinant proteins having biological activity by treating a sample comprising double-stranded template polynucleotides encoding a wild-type protein under conditions according to the invention which provide for the production of hybrid or re-assorted polynucleotides.
Producing Sequence Variants
The invention also provides additional methods for making sequence variants of the nucleic acid (e.g., transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase) sequences of the invention. The invention also provides additional methods for isolating transferases, e.g., transaminases, e.g., d-amino-acid transferases, and/or oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases using the nucleic acids and polypeptides of the invention. In one aspect, the invention provides for variants of a transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase coding sequence (e.g., a gene, cDNA or message) of the invention, which can be altered by any means, including, e.g., random or stochastic methods, or, non-stochastic, or “directed evolution,” methods, as described above.
The isolated variants may be naturally occurring. Variant can also be created in vitro. Variants may be created using genetic engineering techniques such as site directed mutagenesis, random chemical mutagenesis, Exonuclease III deletion procedures, and standard cloning techniques. Alternatively, such variants, fragments, analogs, or derivatives may be created using chemical synthesis or modification procedures. Other methods of making variants are also familiar to those skilled in the art. These include procedures in which nucleic acid sequences obtained from natural isolates are modified to generate new nucleic acids which encode polypeptides having characteristics which enhance their value in industrial, medical, laboratory (research), pharmaceutical, food and feed and food and feed supplement processing and other applications and processes. In such procedures, a large number of variant sequences having one or more nucleotide differences with respect to the sequence obtained from the natural isolate are generated and characterized. These nucleotide differences can result in amino acid changes with respect to the polypeptides encoded by the nucleic acids from the natural isolates.
For example, variants may be created using error prone PCR. In error prone PCR, PCR is performed under conditions where the copying fidelity of the DNA polymerase is low, such that a high rate of point mutations is obtained along the entire length of the PCR product. Error prone PCR is described, e.g., in Leung, D. W., et al., Technique, 1:11-15, 1989) and Caldwell, R. C. & Joyce G. F., PCR Methods Applic., 2:28-33, 1992. Briefly, in such procedures, nucleic acids to be mutagenized are mixed with PCR primers, reaction buffer, MgCl2, MnCl2, Taq polymerase and an appropriate concentration of dNTPs for achieving a high rate of point mutation along the entire length of the PCR product. For example, the reaction may be performed using 20 fmoles of nucleic acid to be mutagenized, 30 pmole of each PCR primer, a reaction buffer comprising 50 mM KCl, 10 mM Tris HCl (pH 8.3) and 0.01% gelatin, 7 mM MgCl2, 0.5 mM MnCl2, 5 units of Taq polymerase, 0.2 mM dGTP, 0.2 mM dATP, 1 mM dCTP, and 1 mM dTTP. PCR may be performed for 30 cycles of 94° C. for 1 min, 45° C. for 1 min, and 72° C. for 1 min. However, it will be appreciated that these parameters may be varied as appropriate. The mutagenized nucleic acids are cloned into an appropriate vector and the activities of the polypeptides encoded by the mutagenized nucleic acids are evaluated.
Variants may also be created using oligonucleotide directed mutagenesis to generate site-specific mutations in any cloned DNA of interest. Oligonucleotide mutagenesis is described, e.g., in Reidhaar-Olson (1988) Science 241:53-57. Briefly, in such procedures a plurality of double stranded oligonucleotides bearing one or more mutations to be introduced into the cloned DNA are synthesized and inserted into the cloned DNA to be mutagenized. Clones containing the mutagenized DNA are recovered and the activities of the polypeptides they encode are assessed.
Another method for generating variants is assembly PCR. Assembly PCR involves the assembly of a PCR product from a mixture of small DNA fragments. A large number of different PCR reactions occur in parallel in the same vial, with the products of one reaction priming the products of another reaction. Assembly PCR is described in, e.g., U.S. Pat. No. 5,965,408.
Still another method of generating variants is sexual PCR mutagenesis. In sexual PCR mutagenesis, forced homologous recombination occurs between DNA molecules of different but highly related DNA sequence in vitro, as a result of random fragmentation of the DNA molecule based on sequence homology, followed by fixation of the crossover by primer extension in a PCR reaction. Sexual PCR mutagenesis is described, e.g., in Stemmer (1994) Proc. Natl. Acad. Sci. USA 91:10747-10751. Briefly, in such procedures a plurality of nucleic acids to be recombined are digested with DNase to generate fragments having an average size of 50-200 nucleotides. Fragments of the desired average size are purified and resuspended in a PCR mixture. PCR is conducted under conditions which facilitate recombination between the nucleic acid fragments. For example, PCR may be performed by resuspending the purified fragments at a concentration of 10-30 ng/μl in a solution of 0.2 mM of each dNTP, 2.2 mM MgCl2, 50 mM KCL, 10 mM Tris HCl, pH 9.0, and 0.1% Triton X-100. 2.5 units of Taq polymerase per 100:1 of reaction mixture is added and PCR is performed using the following regime: 94° C. for 60 seconds, 94° C. for 30 seconds, 50-55° C. for 30 seconds, 72° C. for 30 seconds (30-45 times) and 72° C. for 5 minutes. However, it will be appreciated that these parameters may be varied as appropriate. In some aspects, oligonucleotides may be included in the PCR reactions. In other aspects, the Klenow fragment of DNA polymerase I may be used in a first set of PCR reactions and Taq polymerase may be used in a subsequent set of PCR reactions. Recombinant sequences are isolated and the activities of the polypeptides they encode are assessed.
Variants may also be created by in vivo mutagenesis. In some aspects, random mutations in a sequence of interest are generated by propagating the sequence of interest in a bacterial strain, such as an E. coli strain, which carries mutations in one or more of the DNA repair pathways. Such “mutator” strains have a higher random mutation rate than that of a wild-type parent. Propagating the DNA in one of these strains will eventually generate random mutations within the DNA. Mutator strains suitable for use for in vivo mutagenesis are described in PCT Publication No. WO 91/16427, published Oct. 31, 1991, entitled “Methods for Phenotype Creation from Multiple Gene Populations”.
Variants may also be generated using cassette mutagenesis. In cassette mutagenesis a small region of a double stranded DNA molecule is replaced with a synthetic oligonucleotide “cassette” that differs from the native sequence. The oligonucleotide often contains completely and/or partially randomized native sequence.
Recursive ensemble mutagenesis may also be used to generate variants. Recursive ensemble mutagenesis is an algorithm for protein engineering (protein mutagenesis) developed to produce diverse populations of phenotypically related mutants whose members differ in amino acid sequence. This method uses a feedback mechanism to control successive rounds of combinatorial cassette mutagenesis. Recursive ensemble mutagenesis is described in Arkin, A. P. and Youvan, D. C., PNAS, USA, 89:7811-7815, 1992.
In some aspects, variants are created using exponential ensemble mutagenesis. Exponential ensemble mutagenesis is a process for generating combinatorial libraries with a high percentage of unique and functional mutants, wherein small groups of residues are randomized in parallel to identify, at each altered position, amino acids which lead to functional proteins. Exponential ensemble mutagenesis is described in Delegrave, S. and Youvan, D. C., Biotechnology Research, 11:1548-1552, 1993. Random and site-directed mutagenesis are described in Arnold, F. H., Current Opinion in Biotechnology, 4:450-455, 1993.
In some aspects, the variants are created using shuffling procedures wherein portions of a plurality of nucleic acids which encode distinct polypeptides are fused together to create chimeric nucleic acid sequences which encode chimeric polypeptides as described in U.S. Pat. No. 5,965,408, filed Jul. 9, 1996, entitled, “Method of DNA Reassembly by Interrupting Synthesis” and U.S. Pat. No. 5,939,250, filed May 22, 1996, entitled, “Production of Enzymes Having Desired Activities by Mutagenesis.
The variants of the polypeptides of the invention may be variants in which one or more of the amino acid residues of the polypeptides of the invention are substituted with a conserved or non-conserved amino acid residue (preferably a conserved amino acid residue) and such substituted amino acid residue may or may not be one encoded by the genetic code.
Conservative substitutions are those that substitute a given amino acid in a polypeptide by another amino acid of like characteristics. Typically seen as conservative substitutions are the following replacements: replacements of an aliphatic amino acid such as Alanine, Valine, Leucine and Isoleucine with another aliphatic amino acid; replacement of a Serine with a Threonine or vice versa; replacement of an acidic residue such as Aspartic acid and Glutamic acid with another acidic residue; replacement of a residue bearing an amide group, such as Asparagine and Glutamine, with another residue bearing an amide group; exchange of a basic residue such as Lysine and Arginine with another basic residue; and replacement of an aromatic residue such as Phenylalanine, Tyrosine with another aromatic residue.
Other variants are those in which one or more of the amino acid residues of the polypeptides of the invention includes a substituent group.
Still other variants are those in which the polypeptide is associated with another compound, such as a compound to increase the half-life of the polypeptide (for example, polyethylene glycol).
Additional variants are those in which additional amino acids are fused to the polypeptide, such as a leader sequence, a secretory sequence, a proprotein sequence or a sequence which facilitates purification, enrichment, or stabilization of the polypeptide.
In some aspects, the fragments, derivatives and analogs retain the same biological function or activity as the polypeptides of the invention and sequences substantially identical thereto. In other aspects, the fragment, derivative, or analog includes a proprotein, such that the fragment, derivative, or analog can be activated by cleavage of the proprotein portion to produce an active polypeptide.
Optimizing Codons to Achieve High Levels of Protein Expression in Host Cells
The invention provides methods for modifying transferase-, e.g., transaminase-, e.g., d-amino-acid transferase-, and/or oxidoreductase-, e.g., dehydrogenase-, e.g., d-amino-acid dehydrogenase-encoding nucleic acids to modify codon usage. In one aspect, the invention provides methods for modifying codons in a nucleic acid encoding a transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase to increase or decrease its expression in a host cell. The invention also provides nucleic acids encoding a transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase modified to increase its expression in a host cell, enzymes so modified, and methods of making the modified enzymes. The method comprises identifying a “non-preferred” or a “less preferred” codon in transferase-, e.g., transaminase-, e.g., d-amino-acid transferase-, and/or oxidoreductase-, e.g., dehydrogenase-, e.g., d-amino-acid dehydrogenase-encoding nucleic acid and replacing one or more of these non-preferred or less preferred codons with a “preferred codon” encoding the same amino acid as the replaced codon and at least one non-preferred or less preferred codon in the nucleic acid has been replaced by a preferred codon encoding the same amino acid. A preferred codon is a codon over-represented in coding sequences in genes in the host cell and a non-preferred or less preferred codon is a codon under-represented in coding sequences in genes in the host cell.
Host cells for expressing the nucleic acids, expression cassettes and vectors of the invention include bacteria, yeast, fungi, plant cells, insect cells and mammalian cells. Thus, the invention provides methods for optimizing codon usage in all of these cells, codon-altered nucleic acids and polypeptides made by the codon-altered nucleic acids. Exemplary host cells include gram negative bacteria, such as Escherichia coli and Pseudomonas fluorescens; gram positive bacteria, such as Lactobacillus gasseri, Lactococcus lactis, Lactococcus cremoris, Bacillus subtilis. Exemplary host cells also include eukaryotic organisms, e.g., various yeast, such as Saccharomyces sp., including Saccharomyces cerevisiae, Schizosaccharomyces pombe, Pichia pastoris, and Kluyveromyces lactis, Hansenula polymorpha, Aspergillus niger, and mammalian cells and cell lines and insect cells and cell lines. Other exemplary host cells include bacterial cells, such as E. coli, Streptomyces, Bacillus subtilis, Bacillus cereus, Salmonella typhimurium and various species within the genera Pseudomonas, Streptomyces and Staphylococcus, fungal cells, such as Aspergillus, yeast such as any species of Pichia, Saccharomyces, Schizosaccharomyces, Schwanniomyces, including Pichia pastoris, Saccharomyces cerevisiae, or Schizosaccharomyces pombe, insect cells such as Drosophila S2 and Spodoptera Sf9, animal cells such as CHO, COS or Bowes melanoma and adenoviruses. The selection of an appropriate host is within the abilities of those skilled in the art. Thus, the invention also includes nucleic acids and polypeptides optimized for expression in these organisms and species.
For example, the codons of a nucleic acid encoding a transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase isolated from a bacterial cell are modified such that the nucleic acid is optimally expressed in a bacterial cell different from the bacteria from which the transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase was derived, a yeast, a fungi, a plant cell, an insect cell or a mammalian cell. Methods for optimizing codons are well known in the art, see, e.g., U.S. Pat. No. 5,795,737; Baca (2000) Int. J. Parasitol. 30:113-118; Hale (1998) Protein Expr. Purif. 12:185-188; Narum (2001) Infect. Immun. 69:7250-7253. See also Narum (2001) Infect. Immun. 69:7250-7253, describing optimizing codons in mouse systems; Outchkourov (2002) Protein Expr. Purif. 24:18-24, describing optimizing codons in yeast; Feng (2000) Biochemistry 39:15399-15409, describing optimizing codons in E. coli; Humphreys (2000) Protein Expr. Purif. 20:252-264, describing optimizing codon usage that affects secretion in E. coli. 
Transgenic Non-Human Animals
The invention provides transgenic non-human animals comprising a nucleic acid, a polypeptide (e.g., a transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase), an expression cassette or vector or a transfected or transformed cell of the invention. The invention also provides methods of making and using these transgenic non-human animals.
The transgenic non-human animals can be, e.g., goats, rabbits, sheep, pigs, cows, rats, horses, dogs, fish and mice, comprising the nucleic acids of the invention. These animals can be used, e.g., as in vivo models to study transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase activity, or, as models to screen for agents that change the transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase activity in vivo. The coding sequences for the polypeptides to be expressed in the transgenic non-human animals can be designed to be constitutive, or, under the control of tissue-specific, developmental-specific or inducible transcriptional regulatory factors. Transgenic non-human animals can be designed and generated using any method known in the art; see, e.g., U.S. Pat. Nos. 6,211,428; 6,187,992; 6,156,952; 6,118,044; 6,111,166; 6,107,541; 5,959,171; 5,922,854; 5,892,070; 5,880,327; 5,891,698; 5,639,940; 5,573,933; 5,387,742; 5,087,571, describing making and using transformed cells and eggs and transgenic mice, rats, rabbits, sheep, pigs, chickens, goats, fish and cows. See also, e.g., Pollock (1999) J. Immunol. Methods 231:147-157, describing the production of recombinant proteins in the milk of transgenic dairy animals; Baguisi (1999) Nat. Biotechnol. 17:456-461, demonstrating the production of transgenic goats. U.S. Pat. No. 6,211,428, describes making and using transgenic non-human mammals which express in their brains a nucleic acid construct comprising a DNA sequence. U.S. Pat. No. 5,387,742, describes injecting cloned recombinant or synthetic DNA sequences into fertilized mouse eggs, implanting the injected eggs in pseudo-pregnant females, and growing to term transgenic mice whose cells express proteins related to the pathology of Alzheimer's disease. U.S. Pat. No. 6,187,992, describes making and using a transgenic mouse whose genome comprises a disruption of the gene encoding amyloid precursor protein (APP).
“Knockout animals” can also be used to practice the methods of the invention. For example, in one aspect, the transgenic or modified animals of the invention comprise a “knockout animal,” e.g., a “knockout mouse,” engineered not to express an endogenous gene, which is replaced with a gene expressing a transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase of the invention, or, a fusion protein comprising a transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase of the invention.
Transgenic Plants and Seeds
The invention provides transgenic plants and seeds comprising a nucleic acid, a polypeptide (e.g., a transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase), an expression cassette or vector or a transfected or transformed cell of the invention. The invention also provides plant products or byproducts, e.g., fruits, oils, seeds, leaves, extracts and the like, including any plant part, comprising a nucleic acid and/or a polypeptide (e.g., a transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase) of the invention, e.g., wherein the nucleic acid or polypeptide of the invention is heterologous to the plant, plant part, seed etc. The transgenic plant (which includes plant parts, fruits, seeds etc.) can be dicotyledonous (a dicot) or monocotyledonous (a monocot). The invention also provides methods of making and using these transgenic plants and seeds. The transgenic plant or plant cell expressing a polypeptide of the present invention may be constructed in accordance with any method known in the art. See, for example, U.S. Pat. No. 6,309,872.
Nucleic acids and expression constructs of the invention can be introduced into a plant cell by any means. For example, nucleic acids or expression constructs can be introduced into the genome of a desired plant host, or, the nucleic acids or expression constructs can be episomes. Introduction into the genome of a desired plant can be such that the host's transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase production is regulated by endogenous transcriptional or translational control elements. The invention also provides “knockout plants” where insertion of gene sequence by, e.g., homologous recombination, has disrupted the expression of the endogenous gene. Means to generate “knockout” plants are well-known in the art, see, e.g., Strepp (1998) Proc Natl. Acad. Sci. USA 95:4368-4373; Miao (1995) Plant J 7:359-365. See discussion on transgenic plants, below.
The nucleic acids of the invention can be used to confer desired traits on essentially any plant, e.g., on starch-producing plants, such as potato, wheat, rice, barley, and the like. Nucleic acids of the invention can be used to manipulate metabolic pathways of a plant in order to optimize or alter host's expression of a transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase. The can change transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase activity in a plant. Alternatively, a transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase of the invention can be used in production of a transgenic plant to produce a compound not naturally produced by that plant. This can lower production costs or create a novel product.
In one aspect, the first step in production of a transgenic plant involves making an expression construct for expression in a plant cell. These techniques are well known in the art. They can include selecting and cloning a promoter, a coding sequence for facilitating efficient binding of ribosomes to mRNA and selecting the appropriate gene terminator sequences. One exemplary constitutive promoter is CaMV35S, from the cauliflower mosaic virus, which generally results in a high degree of expression in plants. Other promoters are more specific and respond to cues in the plant's internal or external environment. An exemplary light-inducible promoter is the promoter from the cab gene, encoding the major chlorophyll a/b binding protein.
In one aspect, the nucleic acid is modified to achieve greater expression in a plant cell. For example, a sequence of the invention is likely to have a higher percentage of A-T nucleotide pairs compared to that seen in a plant, some of which prefer G-C nucleotide pairs. Therefore, A-T nucleotides in the coding sequence can be substituted with G-C nucleotides without significantly changing the amino acid sequence to enhance production of the gene product in plant cells.
Selectable marker gene can be added to the gene construct in order to identify plant cells or tissues that have successfully integrated the transgene. This may be necessary because achieving incorporation and expression of genes in plant cells is a rare event, occurring in just a few percent of the targeted tissues or cells. Selectable marker genes encode proteins that provide resistance to agents that are normally toxic to plants, such as antibiotics or herbicides. Only plant cells that have integrated the selectable marker gene will survive when grown on a medium containing the appropriate antibiotic or herbicide. As for other inserted genes, marker genes also require promoter and termination sequences for proper function.
In one aspect, making transgenic plants or seeds comprises incorporating sequences of the invention and, in one aspect (optionally), marker genes into a target expression construct (e.g., a plasmid), along with positioning of the promoter and the terminator sequences. This can involve transferring the modified gene into the plant through a suitable method. For example, a construct may be introduced directly into the genomic DNA of the plant cell using techniques such as electroporation and microinjection of plant cell protoplasts, or the constructs can be introduced directly to plant tissue using ballistic methods, such as DNA particle bombardment. For example, see, e.g., Christou (1997) Plant Mol. Biol. 35:197-203; Pawlowski (1996) Mol. Biotechnol. 6:17-30; Klein (1987) Nature 327:70-73; Takumi (1997) Genes Genet. Syst. 72:63-69, discussing use of particle bombardment to introduce transgenes into wheat; and Adam (1997) supra, for use of particle bombardment to introduce YACs into plant cells. For example, Rinehart (1997) supra, used particle bombardment to generate transgenic cotton plants. Apparatus for accelerating particles is described U.S. Pat. No. 5,015,580; and, the commercially available BioRad (Biolistics) PDS-2000 particle acceleration instrument; see also, John, U.S. Pat. No. 5,608,148; and Ellis, U.S. Pat. No. 5,681,730, describing particle-mediated transformation of gymnosperms.
In one aspect, protoplasts can be immobilized and injected with a nucleic acids, e.g., an expression construct. Although plant regeneration from protoplasts is not easy with cereals, plant regeneration is possible in legumes using somatic embryogenesis from protoplast derived callus. Organized tissues can be transformed with naked DNA using gene gun technique, where DNA is coated on tungsten microprojectiles, shot 1/100th the size of cells, which carry the DNA deep into cells and organelles. Transformed tissue is then induced to regenerate, usually by somatic embryogenesis. This technique has been successful in several cereal species including maize and rice.
Nucleic acids, e.g., expression constructs, can also be introduced in to plant cells using recombinant viruses. Plant cells can be transformed using viral vectors, such as, e.g., tobacco mosaic virus derived vectors (Rouwendal (1997) Plant Mol. Biol. 33:989-999), see Porta (1996) “Use of viral replicons for the expression of genes in plants,” Mol. Biotechnol. 5:209-221.
Alternatively, nucleic acids, e.g., an expression construct, can be combined with suitable T-DNA flanking regions and introduced into a conventional Agrobacterium tumefaciens host vector. The virulence functions of the Agrobacterium tumefaciens host will direct the insertion of the construct and adjacent marker into the plant cell DNA when the cell is infected by the bacteria. Agrobacterium tumefaciens-mediated transformation techniques, including disarming and use of binary vectors, are well described in the scientific literature. See, e.g., Horsch (1984) Science 233:496-498; Fraley (1983) Proc. Natl. Acad. Sci. USA 80:4803 (1983); Gene Transfer to Plants, Potrykus, ed. (Springer-Verlag, Berlin 1995). The DNA in an A. tumefaciens cell is contained in the bacterial chromosome as well as in another structure known as a Ti (tumor-inducing) plasmid. The Ti plasmid contains a stretch of DNA termed T-DNA ( ̃20 kb long) that is transferred to the plant cell in the infection process and a series of vir (virulence) genes that direct the infection process. A. tumefaciens can only infect a plant through wounds: when a plant root or stem is wounded it gives off certain chemical signals, in response to which, the vir genes of A. tumefaciens become activated and direct a series of events necessary for the transfer of the T-DNA from the Ti plasmid to the plant's chromosome. The T-DNA then enters the plant cell through the wound. One speculation is that the T-DNA waits until the plant DNA is being replicated or transcribed, then inserts itself into the exposed plant DNA. In order to use A. tumefaciens as a transgene vector, the tumor-inducing section of T-DNA have to be removed, while retaining the T-DNA border regions and the vir genes. The transgene is then inserted between the T-DNA border regions, where it is transferred to the plant cell and becomes integrated into the plant's chromosomes.
The invention provides for the transformation of monocotyledonous plants using the nucleic acids of the invention, including important cereals, see Hiei (1997) Plant Mol. Biol. 35:205-218. See also, e.g., Horsch, Science (1984) 233:496; Fraley (1983) Proc. Natl. Acad. Sci USA 80:4803; Thykjaer (1997) supra; Park (1996) Plant Mol. Biol. 32:1135-1148, discussing T-DNA integration into genomic DNA. See also D'Halluin, U.S. Pat. No. 5,712,135, describing a process for the stable integration of a DNA comprising a gene that is functional in a cell of a cereal, or other monocotyledonous plant.
In one aspect, the third step can involve selection and regeneration of whole plants capable of transmitting the incorporated target gene to the next generation. Such regeneration techniques rely on manipulation of certain phytohormones in a tissue culture growth medium, and can rely on a biocide and/or herbicide marker that has been introduced together with the desired nucleotide sequences. Plant regeneration from cultured protoplasts is described in Evans et al., Protoplasts Isolation and Culture, Handbook of Plant Cell Culture, pp. 124-176, MacMillilan Publishing Company, New York, 1983; and Binding, Regeneration of Plants, Plant Protoplasts, pp. 21-73, CRC Press, Boca Raton, 1985. Regeneration can also be obtained from plant callus, explants, organs, or parts thereof. Such regeneration techniques are described generally in Klee (1987) Ann Rev. of Plant Phys. 38:467-486. To obtain whole plants from transgenic tissues such as immature embryos, they can be grown under controlled environmental conditions in a series of media containing nutrients and hormones, a process known as tissue culture. Once whole plants are generated and produce seed, evaluation of the progeny begins.
After the expression cassette is stably incorporated in transgenic plants, it can be introduced into other plants by sexual crossing. Any of a number of standard breeding techniques can be used, depending upon the species to be crossed. Since transgenic expression of the nucleic acids of the invention leads to phenotypic changes, plants comprising the recombinant nucleic acids of the invention can be sexually crossed with a second plant to obtain a final product. Thus, the seed of the invention can be derived from a cross between two transgenic plants of the invention, or a cross between a plant of the invention and another plant. The desired effects (e.g., expression of the polypeptides of the invention to produce a plant in which flowering behavior is altered) can be enhanced when both parental plants express the polypeptides (e.g., a transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase) of the invention. The desired effects can be passed to future plant generations by standard propagation means.
The nucleic acids and polypeptides of the invention are expressed in or inserted in any plant or seed. Transgenic plants of the invention can be dicotyledonous or monocotyledonous. Examples of monocot transgenic plants of the invention are grasses, such as meadow grass (blue grass, Poa), forage grass such as festuca, lolium, temperate grass, such as Agrostis, and cereals, e.g., wheat, oats, rye, barley, rice, sorghum, and maize (corn). Examples of dicot transgenic plants of the invention are tobacco, legumes, such as lupins, potato, sugar beet, pea, bean and soybean, and cruciferous plants (family Brassicaceae), such as cauliflower, rape seed, and the closely related model organism Arabidopsis thaliana. Thus, the transgenic plants and seeds of the invention include a broad range of plants, including, but not limited to, species from the genera Anacardium, Arachis, Asparagus, Atropa, Avena, Brassica, Citrus, Citrullus, Capsicum, Carthamus, Cocos, Coffea, Cucumis, Cucurbita, Daucus, Elaeis, Fragaria, Glycine, Gossypium, Helianthus, Heterocallis, Hordeum, Hyoscyamus, Lactuca, Linum, Lolium, Lupinus, Lycopersicon, Malus, Manihot, Majorana, Medicago, Nicotiana, Olea, Oryza, Panieum, Pannisetum, Persea, Phaseolus, Pistachia, Pisum, Pyrus, Prunus, Raphanus, Ricinus, Secale, Senecio, Sinapis, Solanum, Sorghum, Theobromus, Trigonella, Triticum, Vicia, Vitis, Vigna, and Zea. Transgenic plants and seeds of the invention can be any monocot or dicot, e.g., a monocot corn, sugarcane, rice, wheat, barley, switchgrass or Miscanthus; or a dicot oilseed crop, soy, canola, rapeseed, flax, cotton, palm oil, sugar beet, peanut, tree, poplar or lupine.
In alternative embodiments, the nucleic acids of the invention are expressed in plants (and/or their seeds) which contain fiber cells, including, e.g., cotton, silk cotton tree (Kapok, Ceiba pentandra), desert willow, creosote bush, winterfat, balsa, ramie, kenaf, hemp, rosette, jute, sisal abaca and flax. In alternative embodiments, the transgenic plants of the invention can be members of the genus Gossypium, including members of any Gossypium species, such as G. arboreum; G. herbaceum, G. barbadense, and G. hirsutum. 
The invention also provides for transgenic plants (and/or their seeds) to be used for producing large amounts of the polypeptides (e.g., a transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase or antibody) of the invention. For example, see Palmgren (1997) Trends Genet. 13:348; Chong (1997) Transgenic Res. 6:289-296 (producing human milk protein beta-casein in transgenic potato plants using an auxin-inducible, bidirectional mannopine synthase (mas1′,2′) promoter with Agrobacterium tumefaciens-mediated leaf disc transformation methods).
Using known procedures, one of skill can screen for plants (and/or their seeds) of the invention by detecting the increase or decrease of transgene mRNA or protein in transgenic plants. Means for detecting and quantitation of mRNAs or proteins are well known in the art.
Polypeptides and Peptides
In one aspect, the invention provides isolated, synthetic or recombinant polypeptides and peptides having transferase activity, e.g., transaminase activity, e.g., d-amino-acid transferase activity, and/or oxidoreductase activity, e.g., dehydrogenase activity, e.g., d-amino-acid dehydrogenase activity, or polypeptides and peptides capable of generating an antibody that specifically binds to a transferase, e.g., a transaminase, e.g., a d-amino-acid transferase, and/or an oxidoreductase, e.g., a dehydrogenase, e.g., a d-amino-acid dehydrogenase, including an enzyme of this invention, including the amino acid sequences of the invention, which include those having at least 50%, 51%, 52%, 53%, 54%, 55%, 56%, 57%, 58%, 59%, 60%, 61%, 62%, 63%, 64%, 65%, 66%, 67%, 68%, 69%, 70%, 71%, 72%, 73%, 74%, 75%, 76%, 77%, 78%, 79%, 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99% or more, or 100% (complete) sequence identity to an exemplary polypeptide of the invention (as defined above, including SEQ ID NO:2, SEQ ID NO:4, SEQ ID NO:6, SEQ ID NO:8, SEQ ID NO:10, SEQ ID NO:12, SEQ ID NO:14, SEQ ID NO:16, SEQ ID NO:18, SEQ ID NO:20, SEQ ID NO:22, SEQ ID NO:24, SEQ ID NO:26, SEQ ID NO:28, SEQ ID NO:30, SEQ ID NO:32, SEQ ID NO:34, SEQ ID NO:36, SEQ ID NO:38, SEQ ID NO:40, SEQ ID NO:42, SEQ ID NO:44, SEQ ID NO:46, SEQ ID NO:48, SEQ ID NO:50, SEQ ID NO:52, SEQ ID NO:54, SEQ ID NO:56, SEQ ID NO:58, SEQ ID NO:60, SEQ ID NO:62, SEQ ID NO:64, SEQ ID NO:66, SEQ ID NO:68, SEQ ID NO:70, SEQ ID NO:72, SEQ ID NO:74, SEQ ID NO:76, SEQ ID NO:78, SEQ ID NO:80, SEQ ID NO:82, SEQ ID NO:84, SEQ ID NO:86, SEQ ID NO:88, SEQ ID NO:90, SEQ ID NO:92, SEQ ID NO:94, SEQ ID NO:96, SEQ ID NO:98, SEQ ID NO:100, SEQ ID NO:102, SEQ ID NO:104, SEQ ID NO:106, SEQ ID NO:108, SEQ ID NO:110, SEQ ID NO:112, SEQ ID NO:114, SEQ ID NO:116, SEQ ID NO:118, SEQ ID NO:120, SEQ ID NO:122, SEQ ID NO:124, SEQ ID NO:126, SEQ ID NO:128, SEQ ID NO:130, SEQ ID NO:132, SEQ ID NO:134, SEQ ID NO:136, SEQ ID NO:138, SEQ ID NO:140, SEQ ID NO:142, SEQ ID NO:143, SEQ ID NO:146, SEQ ID NO:148, SEQ ID NO:150, SEQ ID NO:152, SEQ ID NO:154, SEQ ID NO:156, SEQ ID NO:158, SEQ ID NO:160, SEQ ID NO:162, SEQ ID NO:164, SEQ ID NO:166, SEQ ID NO:168, SEQ ID NO:170, SEQ ID NO:172, SEQ ID NO:174, SEQ ID NO:176, SEQ ID NO:178, SEQ ID NO:180, SEQ ID NO:182, SEQ ID NO:184, SEQ ID NO:186, SEQ ID NO:188, SEQ ID NO:190, SEQ ID NO:192, SEQ ID NO:194, SEQ ID NO:196, SEQ ID NO:198, SEQ ID NO:200, SEQ ID NO:202, SEQ ID NO:204, SEQ ID NO:206, SEQ ID NO:208, SEQ ID NO:210, SEQ ID NO:212, SEQ ID NO:214, SEQ ID NO:216, SEQ ID NO:218, SEQ ID NO:220, SEQ ID NO:220 with one, several or all of the modifications of Table 46 or Table 55, SEQ ID NO:222, SEQ ID NO:224, SEQ ID NO:226, SEQ ID NO:228, SEQ ID NO:230, SEQ ID NO:232, SEQ ID NO:234, SEQ ID NO:236, SEQ ID NO:238, SEQ ID NO:240, SEQ ID NO:242, SEQ ID NO:244, SEQ ID NO:246, SEQ ID NO:248, SEQ ID NO:250, SEQ ID NO:252, SEQ ID NO:254, SEQ ID NO:256, SEQ ID NO:258, SEQ ID NO:260, SEQ ID NO:262, SEQ ID NO:264, SEQ ID NO:266, SEQ ID NO:268, SEQ ID NO:270, SEQ ID NO:272, SEQ ID NO:274, SEQ ID NO:276, SEQ ID NO:278, SEQ ID NO:280, SEQ ID NO:282, SEQ ID NO:284, SEQ ID NO:286, SEQ ID NO:288, SEQ ID NO:290, SEQ ID NO:292, SEQ ID NO:294, SEQ ID NO:296, SEQ ID NO:298, SEQ ID NO:300, SEQ ID NO:302, SEQ ID NO:304, SEQ ID NO:306, SEQ ID NO:308, SEQ ID NO:310, SEQ ID NO:312, SEQ ID NO:314, SEQ ID NO:316, SEQ ID NO:318, SEQ ID NO:320, SEQ ID NO:322, SEQ ID NO:324, SEQ ID NO:326, SEQ ID NO:328, SEQ ID NO:330, SEQ ID NO:332, SEQ ID NO:334, SEQ ID NO:336, SEQ ID NO:338, SEQ ID NO:340, SEQ ID NO:342, SEQ ID NO:344, SEQ ID NO:346, SEQ ID NO:348, SEQ ID NO:350, SEQ ID NO:352, SEQ ID NO:354, SEQ ID NO:356, SEQ ID NO:358, SEQ ID NO:360, SEQ ID NO:362, SEQ ID NO:364, SEQ ID NO:366, SEQ ID NO:368, SEQ ID NO:370, SEQ ID NO:372, SEQ ID NO:374, SEQ ID NO:376, SEQ ID NO:378, SEQ ID NO:380, SEQ ID NO:382, SEQ ID NO:384, SEQ ID NO:386, SEQ ID NO:388, SEQ ID NO:390, SEQ ID NO:392, SEQ ID NO:394, SEQ ID NO:396, SEQ ID NO:398, SEQ ID NO:400, SEQ ID NO:402, SEQ ID NO:404, SEQ ID NO:406, SEQ ID NO:408, SEQ ID NO:410, SEQ ID NO:412, SEQ ID NO:414, SEQ ID NO:416, SEQ ID NO:418, SEQ ID NO:420, SEQ ID NO:422, SEQ ID NO:424, SEQ ID NO:426, SEQ ID NO:428, SEQ ID NO:430, SEQ ID NO:432, SEQ ID NO:434, SEQ ID NO:436, SEQ ID NO:438, SEQ ID NO:440, SEQ ID NO:442, SEQ ID NO:444, SEQ ID NO:446, SEQ ID NO:448, SEQ ID NO:450, SEQ ID NO:452, SEQ ID NO:454, SEQ ID NO:456, SEQ ID NO:458, SEQ ID NO:460, SEQ ID NO:462, SEQ ID NO:464, SEQ ID NO:466, SEQ ID NO:468, SEQ ID NO:470, SEQ ID NO:472, SEQ ID NO:474, SEQ ID NO:476, SEQ ID NO:478, SEQ ID NO:480, SEQ ID NO:482, SEQ ID NO:484, SEQ ID NO:486, SEQ ID NO:488, SEQ ID NO:490, SEQ ID NO:492, SEQ ID NO:494, SEQ ID NO:496, SEQ ID NO:498, SEQ ID NO:500, SEQ ID NO:502, SEQ ID NO:504, SEQ ID NO:506, SEQ ID NO:508, SEQ ID NO:510, SEQ ID NO:512, SEQ ID NO:514, SEQ ID NO:516, SEQ ID NO:518, SEQ ID NO:520, SEQ ID NO:522, SEQ ID NO:524, SEQ ID NO:526, SEQ ID NO:528, SEQ ID NO:530, SEQ ID NO:532, SEQ ID NO:534, SEQ ID NO:536, SEQ ID NO:538, SEQ ID NO:540, SEQ ID NO:542, SEQ ID NO:544, SEQ ID NO:546, SEQ ID NO:548, SEQ ID NO:550, SEQ ID NO:552, SEQ ID NO:554, SEQ ID NO:556, SEQ ID NO:558, SEQ ID NO:560, SEQ ID NO:562, SEQ ID NO:564, SEQ ID NO:566, SEQ ID NO:568, SEQ ID NO:570, SEQ ID NO:572, SEQ ID NO:574, SEQ ID NO:576, SEQ ID NO:578, SEQ ID NO:580, SEQ ID NO:582, SEQ ID NO:584, SEQ ID NO:586, SEQ ID NO:588, SEQ ID NO:590, SEQ ID NO:592, SEQ ID NO:594, SEQ ID NO:596, SEQ ID NO:598, SEQ ID NO:600, SEQ ID NO:602, SEQ ID NO:604, SEQ ID NO:606, SEQ ID NO:608, SEQ ID NO:610, SEQ ID NO:612, SEQ ID NO:614, SEQ ID NO:616, SEQ ID NO:618, SEQ ID NO:620, SEQ ID NO:622, SEQ ID NO:624, SEQ ID NO:626, SEQ ID NO:628, SEQ ID NO:630, SEQ ID NO:632, SEQ ID NO:634, SEQ ID NO:636, SEQ ID NO:638, SEQ ID NO:640, SEQ ID NO:642, SEQ ID NO:644, SEQ ID NO:646, SEQ ID NO:648, SEQ ID NO:650, SEQ ID NO:652, SEQ ID NO:654, SEQ ID NO:656, SEQ ID NO:658, SEQ ID NO:660, SEQ ID NO:662, SEQ ID NO:664, SEQ ID NO:666, SEQ ID NO:668, SEQ ID NO:670, SEQ ID NO:672, SEQ ID NO:674, SEQ ID NO:676, SEQ ID NO:678, SEQ ID NO:680, SEQ ID NO:682, SEQ ID NO:684, SEQ ID NO:686, SEQ ID NO:688, SEQ ID NO:690, SEQ ID NO:692, SEQ ID NO:694, SEQ ID NO:696, SEQ ID NO:698, SEQ ID NO:700, SEQ ID NO:702, SEQ ID NO:704, SEQ ID NO:706, SEQ ID NO:708, SEQ ID NO:710, SEQ ID NO:712, SEQ ID NO:714, SEQ ID NO:716, SEQ ID NO:718, SEQ ID NO:720, SEQ ID NO:722, SEQ ID NO:724, SEQ ID NO:726, SEQ ID NO:728, SEQ ID NO:730, SEQ ID NO:732, SEQ ID NO:734, SEQ ID NO:736, SEQ ID NO:738, SEQ ID NO:740, SEQ ID NO:742, SEQ ID NO:744, SEQ ID NO:746, SEQ ID NO:748, SEQ ID NO:750, SEQ ID NO:752, SEQ ID NO:754, SEQ ID NO:756, SEQ ID NO:758, SEQ ID NO:760, SEQ ID NO:762, SEQ ID NO:764, SEQ ID NO:766, SEQ ID NO:768, SEQ ID NO:770, SEQ ID NO:772, SEQ ID NO:774, SEQ ID NO:776, SEQ ID NO:778, SEQ ID NO:780, SEQ ID NO:782, SEQ ID NO:784, SEQ ID NO:786, SEQ ID NO:788, SEQ ID NO:790, SEQ ID NO:792, SEQ ID NO:794, SEQ ID NO:796, SEQ ID NO:798, SEQ ID NO:800, SEQ ID NO:802, SEQ ID NO:804, SEQ ID NO:808, SEQ ID NO:808, SEQ ID NO:810, SEQ ID NO:812, SEQ ID NO:814, SEQ ID NO:816, SEQ ID NO:818, SEQ ID NO:820, SEQ ID NO:822, SEQ ID NO:824, SEQ ID NO:826, SEQ ID NO:828, SEQ ID NO:830, SEQ ID NO:832, SEQ ID NO:834, SEQ ID NO:836, SEQ ID NO:838, SEQ ID NO:840, SEQ ID NO:842, SEQ ID NO:844, SEQ ID NO:846, SEQ ID NO:848, SEQ ID NO:850, SEQ ID NO:852, SEQ ID NO:854, SEQ ID NO:856, SEQ ID NO:858, SEQ ID NO:860, SEQ ID NO:862, SEQ ID NO:864, SEQ ID NO:866, SEQ ID NO:868, SEQ ID NO:870, SEQ ID NO:872, SEQ ID NO:874, SEQ ID NO:876, SEQ ID NO:878, SEQ ID NO:880, SEQ ID NO:882, SEQ ID NO:884, SEQ ID NO:886, SEQ ID NO:888, SEQ ID NO:890, SEQ ID NO:892, SEQ ID NO:894, SEQ ID NO:896, SEQ ID NO:898, SEQ ID NO:900, SEQ ID NO:902, SEQ ID NO:904, SEQ ID NO:906, SEQ ID NO:908, SEQ ID NO:910, SEQ ID NO:912, SEQ ID NO:914, SEQ ID NO:916, SEQ ID NO:918, SEQ ID NO:920, SEQ ID NO:922, SEQ ID NO:924, SEQ ID NO:926, SEQ ID NO:928, SEQ ID NO:930, SEQ ID NO:932, SEQ ID NO:934, SEQ ID NO:936, SEQ ID NO:938, SEQ ID NO:940, SEQ ID NO:942, SEQ ID NO:944, SEQ ID NO:946, SEQ ID NO:948, SEQ ID NO:950, SEQ ID NO:952, SEQ ID NO:954, SEQ ID NO:956, SEQ ID NO:958, SEQ ID NO:960, SEQ ID NO:962, SEQ ID NO:964, SEQ ID NO:966, SEQ ID NO:968, SEQ ID NO:970, SEQ ID NO:972, SEQ ID NO:974 and/or SEQ ID NO:976), including the amino acid sequences described herein, including in Tables 1, 2, 3, 46, 47 and 53, and the Sequence Listing (all of these amino acid sequences are “exemplary enzymes/polypeptides of the invention”), and enzymatically active subsequences (fragments) thereof; and the nucleic acids that encode all of these amino acid sequences are nucleic acid (polynucleotide) sequences of the invention.
In one aspect, the invention provides chimeric enzymes, including a transferase, e.g., a transaminase, e.g., a d-amino-acid transferase, and/or an oxidoreductase, e.g., a dehydrogenase, e.g., a d-amino-acid dehydrogenase, having heterologous binding domains, e.g., for use in the processes of the invention and in various industrial, medical, pharmaceutical, research, food and feed and food and feed supplement processing and other applications. For example, in one aspect the invention provides enzymes, e.g., transferases, e.g., transaminases, e.g., d-amino-acid transferases, and/or oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases comprising one or more binding domain of an enzyme of the invention. In another aspect, binding domains, between different enzymes of the invention can be swapped; or, alternatively, one or more binding domains of one or more enzymes of the invention can be spliced into an enzyme, e.g., a transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase. In one aspect of the invention, the binding domains are selected from a NAD, a NAD(P), a calcium, a thiamine, a FAD, a zinc, a DNA and/or a lipoyl binding domain.
The invention further provides chimeric enzymes having heterologous, non-natural substrates; including chimeric enzymes having multiple substrates by nature of their “spliced-in” heterologous binding domains—thus giving the chimeric enzyme new specificity or enhanced binding. The heterologous binding domains of the chimeric enzymes of the invention can be designed to be modular, i.e., to be appended to a catalytic module or catalytic domain (e.g., an active site), which also can be heterologous or can be homologous to the enzyme.
Utilization of just the catalytic module of a transferase, e.g., a transaminase, e.g., a d-amino-acid transferase, and/or an oxidoreductase, e.g., a dehydrogenase, e.g., a d-amino-acid dehydrogenase (e.g., an enzyme of the invention) has been shown to be effective. Thus, the invention provides peptides and polypeptides consisting of, or comprising, modular binding domains/active site modules, which can be homologously paired or joined as chimeric (heterologous) active site-binding module pairs. Thus, these chimeric polypeptides/peptides of the invention can be used to improve or alter the performance of an individual enzyme, e.g., a transferase, e.g., a transaminase, e.g., a d-amino-acid transferase, and/or an oxidoreductase, e.g., a dehydrogenase, e.g., a d-amino-acid dehydrogenase enzyme. A chimeric catalytic module of the invention (comprising, e.g., at least one binding domain of the invention) can be designed to target the enzyme to particular regions of a substrate. For example, in one aspect, this is achieved by making fusions of the transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase and various binding domains (either a transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase of the invention with a heterologous binding domain, or, a binding domain of the invention with another enzyme, e.g., a transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase.
Thus, the invention provides chimeric transferases, e.g., transaminases, e.g., d-amino-acid transferases, and/or oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases, e.g., a fusion of a transaminase and/or a dehydrogenase with different (e.g., heterologous) binding domains. In one aspect, the chimeric transferases, e.g., transaminases, e.g., d-amino-acid transferases, and/or oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases comprise an enzyme of the invention. In one aspect, the chimeric enzyme comprises fusions of different binding domains. The invention also provides methods comprising recombining different binding domains with different transferases, e.g., transaminases, e.g., d-amino-acid transferases, and/or oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases (e.g., binding domains of the invention and/or transferases, e.g., transaminases, e.g., d-amino-acid transferases, and/or oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases of the invention) and screening the resultant chimerics to find the best combination for a particular application or substrate.
Other variations also are within the scope of this invention, e.g., where one, two, three, four or five or more residues are removed from the carboxy- or amino-terminal ends of any polypeptide of the invention. Another variation includes modifying any residue to increase or decrease pI of a polypeptide, e.g., removing or modifying (e.g., to another amino acid) a glutamate. This method was used as a general scheme for improving the enzyme's properties without creating regulatory issues since no amino acids are mutated; and this general scheme can be used with any polypeptide of the invention.
The invention provides isolated, synthetic or recombinant polypeptides having transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase activity, wherein the polypeptide has a sequence modification of any polypeptide of the invention, including any exemplary amino acid sequence of the invention, including SEQ ID NO:2, SEQ ID NO:4, SEQ ID NO:6, SEQ ID NO:8, SEQ ID NO:10, SEQ ID NO:12, SEQ ID NO:14, SEQ ID NO:16, SEQ ID NO:18, SEQ ID NO:20, SEQ ID NO:22, SEQ ID NO:24, SEQ ID NO:26, SEQ ID NO:28, SEQ ID NO:30, SEQ ID NO:32, SEQ ID NO:34, SEQ ID NO:36, SEQ ID NO:38, SEQ ID NO:40, SEQ ID NO:42, SEQ ID NO:44, SEQ ID NO:46, SEQ ID NO:48, SEQ ID NO:50, SEQ ID NO:52, SEQ ID NO:54, SEQ ID NO:56, SEQ ID NO:58, SEQ ID NO:60, SEQ ID NO:62, SEQ ID NO:64, SEQ ID NO:66, SEQ ID NO:68, SEQ ID NO:70, SEQ ID NO:72, SEQ ID NO:74, SEQ ID NO:76, SEQ ID NO:78, SEQ ID NO:80, SEQ ID NO:82, SEQ ID NO:84, SEQ ID NO:86, SEQ ID NO:88, SEQ ID NO:90, SEQ ID NO:92, SEQ ID NO:94, SEQ ID NO:96, SEQ ID NO:98, SEQ ID NO:100, SEQ ID NO:102, SEQ ID NO:104, SEQ ID NO:106, SEQ ID NO:108, SEQ ID NO:110, SEQ ID NO:112, SEQ ID NO:114, SEQ ID NO:116, SEQ ID NO:118, SEQ ID NO:120, SEQ ID NO:122, SEQ ID NO:124, SEQ ID NO:126, SEQ ID NO:128, SEQ ID NO:130, SEQ ID NO:132, SEQ ID NO:134, SEQ ID NO:136, SEQ ID NO:138, SEQ ID NO:140, SEQ ID NO:142, SEQ ID NO:143, SEQ ID NO:146, SEQ ID NO:148, SEQ ID NO:150, SEQ ID NO:152, SEQ ID NO:154, SEQ ID NO:156, SEQ ID NO:158, SEQ ID NO:160, SEQ ID NO:162, SEQ ID NO:164, SEQ ID NO:166, SEQ ID NO:168, SEQ ID NO:170, SEQ ID NO:172, SEQ ID NO:174, SEQ ID NO:176, SEQ ID NO:178, SEQ ID NO:180, SEQ ID NO:182, SEQ ID NO:184, SEQ ID NO:186, SEQ ID NO:188, SEQ ID NO:190, SEQ ID NO:192, SEQ ID NO:194, SEQ ID NO:196, SEQ ID NO:198, SEQ ID NO:200, SEQ ID NO:202, SEQ ID NO:204, SEQ ID NO:206, SEQ ID NO:208, SEQ ID NO:210, SEQ ID NO:212, SEQ ID NO:214, SEQ ID NO:216, SEQ ID NO:218, SEQ ID NO:220, SEQ ID NO:220 with one, several or all of the modifications of Table 46 or Table 55, SEQ ID NO:222, SEQ ID NO:224, SEQ ID NO:226, SEQ ID NO:228, SEQ ID NO:230, SEQ ID NO:232, SEQ ID NO:234, SEQ ID NO:236, SEQ ID NO:238, SEQ ID NO:240, SEQ ID NO:242, SEQ ID NO:244, SEQ ID NO:246, SEQ ID NO:248, SEQ ID NO:250, SEQ ID NO:252, SEQ ID NO:254, SEQ ID NO:256, SEQ ID NO:258, SEQ ID NO:260, SEQ ID NO:262, SEQ ID NO:264, SEQ ID NO:266, SEQ ID NO:268, SEQ ID NO:270, SEQ ID NO:272, SEQ ID NO:274, SEQ ID NO:276, SEQ ID NO:278, SEQ ID NO:280, SEQ ID NO:282, SEQ ID NO:284, SEQ ID NO:286, SEQ ID NO:288, SEQ ID NO:290, SEQ ID NO:292, SEQ ID NO:294, SEQ ID NO:296, SEQ ID NO:298, SEQ ID NO:300, SEQ ID NO:302, SEQ ID NO:304, SEQ ID NO:306, SEQ ID NO:308, SEQ ID NO:310, SEQ ID NO:312, SEQ ID NO:314, SEQ ID NO:316, SEQ ID NO:318, SEQ ID NO:320, SEQ ID NO:322, SEQ ID NO:324, SEQ ID NO:326, SEQ ID NO:328, SEQ ID NO:330, SEQ ID NO:332, SEQ ID NO:334, SEQ ID NO:336, SEQ ID NO:338, SEQ ID NO:340, SEQ ID NO:342, SEQ ID NO:344, SEQ ID NO:346, SEQ ID NO:348, SEQ ID NO:350, SEQ ID NO:352, SEQ ID NO:354, SEQ ID NO:356, SEQ ID NO:358, SEQ ID NO:360, SEQ ID NO:362, SEQ ID NO:364, SEQ ID NO:366, SEQ ID NO:368, SEQ ID NO:370, SEQ ID NO:372, SEQ ID NO:374, SEQ ID NO:376, SEQ ID NO:378, SEQ ID NO:380, SEQ ID NO:382, SEQ ID NO:384, SEQ ID NO:386, SEQ ID NO:388, SEQ ID NO:390, SEQ ID NO:392, SEQ ID NO:394, SEQ ID NO:396, SEQ ID NO:398, SEQ ID NO:400, SEQ ID NO:402, SEQ ID NO:404, SEQ ID NO:406, SEQ ID NO:408, SEQ ID NO:410, SEQ ID NO:412, SEQ ID NO:414, SEQ ID NO:416, SEQ ID NO:418, SEQ ID NO:420, SEQ ID NO:422, SEQ ID NO:424, SEQ ID NO:426, SEQ ID NO:428, SEQ ID NO:430, SEQ ID NO:432, SEQ ID NO:434, SEQ ID NO:436, SEQ ID NO:438, SEQ ID NO:440, SEQ ID NO:442, SEQ ID NO:444, SEQ ID NO:446, SEQ ID NO:448, SEQ ID NO:450, SEQ ID NO:452, SEQ ID NO:454, SEQ ID NO:456, SEQ ID NO:458, SEQ ID NO:460, SEQ ID NO:462, SEQ ID NO:464, SEQ ID NO:466, SEQ ID NO:468, SEQ ID NO:470, SEQ ID NO:472, SEQ ID NO:474, SEQ ID NO:476, SEQ ID NO:478, SEQ ID NO:480, SEQ ID NO:482, SEQ ID NO:484, SEQ ID NO:486, SEQ ID NO:488, SEQ ID NO:490, SEQ ID NO:492, SEQ ID NO:494, SEQ ID NO:496, SEQ ID NO:498, SEQ ID NO:500, SEQ ID NO:502, SEQ ID NO:504, SEQ ID NO:506, SEQ ID NO:508, SEQ ID NO:510, SEQ ID NO:512, SEQ ID NO:514, SEQ ID NO:516, SEQ ID NO:518, SEQ ID NO:520, SEQ ID NO:522, SEQ ID NO:524, SEQ ID NO:526, SEQ ID NO:528, SEQ ID NO:530, SEQ ID NO:532, SEQ ID NO:534, SEQ ID NO:536, SEQ ID NO:538, SEQ ID NO:540, SEQ ID NO:542, SEQ ID NO:544, SEQ ID NO:546, SEQ ID NO:548, SEQ ID NO:550, SEQ ID NO:552, SEQ ID NO:554, SEQ ID NO:556, SEQ ID NO:558, SEQ ID NO:560, SEQ ID NO:562, SEQ ID NO:564, SEQ ID NO:566, SEQ ID NO:568, SEQ ID NO:570, SEQ ID NO:572, SEQ ID NO:574, SEQ ID NO:576, SEQ ID NO:578, SEQ ID NO:580, SEQ ID NO:582, SEQ ID NO:584, SEQ ID NO:586, SEQ ID NO:588, SEQ ID NO:590, SEQ ID NO:592, SEQ ID NO:594, SEQ ID NO:596, SEQ ID NO:598, SEQ ID NO:600, SEQ ID NO:602, SEQ ID NO:604, SEQ ID NO:606, SEQ ID NO:608, SEQ ID NO:610, SEQ ID NO:612, SEQ ID NO:614, SEQ ID NO:616, SEQ ID NO:618, SEQ ID NO:620, SEQ ID NO:622, SEQ ID NO:624, SEQ ID NO:626, SEQ ID NO:628, SEQ ID NO:630, SEQ ID NO:632, SEQ ID NO:634, SEQ ID NO:636, SEQ ID NO:638, SEQ ID NO:640, SEQ ID NO:642, SEQ ID NO:644, SEQ ID NO:646, SEQ ID NO:648, SEQ ID NO:650, SEQ ID NO:652, SEQ ID NO:654, SEQ ID NO:656, SEQ ID NO:658, SEQ ID NO:660, SEQ ID NO:662, SEQ ID NO:664, SEQ ID NO:666, SEQ ID NO:668, SEQ ID NO:670, SEQ ID NO:672, SEQ ID NO:674, SEQ ID NO:676, SEQ ID NO:678, SEQ ID NO:680, SEQ ID NO:682, SEQ ID NO:684, SEQ ID NO:686, SEQ ID NO:688, SEQ ID NO:690, SEQ ID NO:692, SEQ ID NO:694, SEQ ID NO:696, SEQ ID NO:698, SEQ ID NO:700, SEQ ID NO:702, SEQ ID NO:704, SEQ ID NO:706, SEQ ID NO:708, SEQ ID NO:710, SEQ ID NO:712, SEQ ID NO:714, SEQ ID NO:716, SEQ ID NO:718, SEQ ID NO:720, SEQ ID NO:722, SEQ ID NO:724, SEQ ID NO:726, SEQ ID NO:728, SEQ ID NO:730, SEQ ID NO:732, SEQ ID NO:734, SEQ ID NO:736, SEQ ID NO:738, SEQ ID NO:740, SEQ ID NO:742, SEQ ID NO:744, SEQ ID NO:746, SEQ ID NO:748, SEQ ID NO:750, SEQ ID NO:752, SEQ ID NO:754, SEQ ID NO:756, SEQ ID NO:758, SEQ ID NO:760, SEQ ID NO:762, SEQ ID NO:764, SEQ ID NO:766, SEQ ID NO:768, SEQ ID NO:770, SEQ ID NO:772, SEQ ID NO:774, SEQ ID NO:776, SEQ ID NO:778, SEQ ID NO:780, SEQ ID NO:782, SEQ ID NO:784, SEQ ID NO:786, SEQ ID NO:788, SEQ ID NO:790, SEQ ID NO:792, SEQ ID NO:794, SEQ ID NO:796, SEQ ID NO:798, SEQ ID NO:800, SEQ ID NO:802, SEQ ID NO:804, SEQ ID NO:808, SEQ ID NO:808, SEQ ID NO:810, SEQ ID NO:812, SEQ ID NO:814, SEQ ID NO:816, SEQ ID NO:818, SEQ ID NO:820, SEQ ID NO:822, SEQ ID NO:824, SEQ ID NO:826, SEQ ID NO:828, SEQ ID NO:830, SEQ ID NO:832, SEQ ID NO:834, SEQ ID NO:836, SEQ ID NO:838, SEQ ID NO:840, SEQ ID NO:842, SEQ ID NO:844, SEQ ID NO:846, SEQ ID NO:848, SEQ ID NO:850, SEQ ID NO:852, SEQ ID NO:854, SEQ ID NO:856, SEQ ID NO:858, SEQ ID NO:860, SEQ ID NO:862, SEQ ID NO:864, SEQ ID NO:866, SEQ ID NO:868, SEQ ID NO:870, SEQ ID NO:872, SEQ ID NO:874, SEQ ID NO:876, SEQ ID NO:878, SEQ ID NO:880, SEQ ID NO:882, SEQ ID NO:884, SEQ ID NO:886, SEQ ID NO:888, SEQ ID NO:890, SEQ ID NO:892, SEQ ID NO:894, SEQ ID NO:896, SEQ ID NO:898, SEQ ID NO:900, SEQ ID NO:902, SEQ ID NO:904, SEQ ID NO:906, SEQ ID NO:908, SEQ ID NO:910, SEQ ID NO:912, SEQ ID NO:914, SEQ ID NO:916, SEQ ID NO:918, SEQ ID NO:920, SEQ ID NO:922, SEQ ID NO:924, SEQ ID NO:926, SEQ ID NO:928, SEQ ID NO:930, SEQ ID NO:932, SEQ ID NO:934, SEQ ID NO:936, SEQ ID NO:938, SEQ ID NO:940, SEQ ID NO:942, SEQ ID NO:944, SEQ ID NO:946, SEQ ID NO:948, SEQ ID NO:950, SEQ ID NO:952, SEQ ID NO:954, SEQ ID NO:956, SEQ ID NO:958, SEQ ID NO:960, SEQ ID NO:962, SEQ ID NO:964, SEQ ID NO:966, SEQ ID NO:968, SEQ ID NO:970, SEQ ID NO:972, SEQ ID NO:974 and/or SEQ ID NO:976, including the sequences described herein and in Tables 1, 2 and 3, and the Sequence Listing (all of these sequences are “exemplary enzymes/polypeptides of the invention”), and enzymatically active subsequences (fragments) thereof. The sequence change(s) can also comprise any amino acid modification to change the pI of a polypeptide, e.g., deletion or modification of a glutamate, or changing from a glutamate to another residue.
The invention further provides isolated, synthetic or recombinant polypeptides having a sequence identity (e.g., at least about 50%, 51%, 52%, 53%, 54%, 55%, 56%, 57%, 58%, 59%, 60%, 61%, 62%, 63%, 64%, 65%, 66%, 67%, 68%, 69%, 70%, 71%, 72%, 73%, 74%, 75%, 76%, 77%, 78%, 79%, 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or more, or complete (100%) sequence identity) to an exemplary sequence of the invention.
In one aspect, the polypeptide has a transferase activity, e.g., transaminase activity, e.g., d-amino-acid transferase activity, and/or oxidoreductase activity, e.g., dehydrogenase activity, e.g., d-amino-acid dehydrogenase activity, and/or catalyze the transfer of a chemical group, catalyze transamination, catalyze the reaction: D-alanine+2-oxoglutarate<=>pyruvate+D-glutamate, and/or catalyze an oxidation-reduction reaction, catalyze the removal of hydrogen atoms, and/or catalyze the reaction: D-amino acid+H2O+acceptor<=>a 2-oxo acid+NH3+reduced acceptor.
Any transferase activity, e.g., transaminase activity, e.g., d-amino-acid transferase activity, and/or oxidoreductase activity, e.g., dehydrogenase activity, e.g., d-amino-acid dehydrogenase assay known in the art can be used to determine if a polypeptide has transferase activity, e.g., transaminase activity, e.g., d-amino-acid transferase activity, and/or oxidoreductase activity, e.g., dehydrogenase activity, e.g., d-amino-acid dehydrogenase activity and is within scope of the invention. For example, Lee, et. al. (AEM. 2006 February. 72(2):1588-1594) describes calculating pyruvate formation rate using a coupling assay with lactate dehydrogenase. In another example, Mayer (Journal of Biomolecular Screening, Vol. 7, No. 2, 135-140 (2002)) describes a colorimetric assay which uses Nitroblue tetrazolium (NBT) and phenazine methosulfate (PMS) in reaction with NADPH produced by dehydrogenases to produce an insoluble blue-purple formazan.
The polypeptides of the invention include transferases, e.g., transaminases, e.g., d-amino-acid transferases, and/or oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases in an active or inactive form. For example, the polypeptides of the invention include proproteins before “maturation” or processing of prepro sequences, e.g., by a proprotein-processing enzyme, such as a proprotein convertase to generate an “active” mature protein. The polypeptides of the invention include transferases, e.g., transaminases, e.g., d-amino-acid transferases, and/or oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases inactive for other reasons, e.g., before “activation” by a post-translational processing event, e.g., an endo- or exo-peptidase or proteinase action, a phosphorylation event, an amidation, a glycosylation or a sulfation, a dimerization event, and the like. The polypeptides of the invention include all active forms, including active subsequences, e.g., catalytic domains or active sites, of the transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase.
Methods for identifying “prepro” domain sequences and signal sequences are well known in the art, see, e.g., Van de Ven (1993) Crit. Rev. Oncog. 4(2):115-136. For example, to identify a prepro sequence, the protein is purified from the extracellular space and the N-terminal protein sequence is determined and compared to the unprocessed form.
The invention includes polypeptides with or without a signal sequence and/or a prepro sequence. The invention includes polypeptides with heterologous signal sequences and/or prepro sequences. The prepro sequence (including a sequence of the invention used as a heterologous prepro domain) can be located on the amino terminal or the carboxy terminal end of the protein. The invention also includes isolated, synthetic or recombinant signal sequences, prepro sequences and catalytic domains (e.g., “active sites”) comprising sequences of the invention.
The percent sequence identity can be over the full length of the polypeptide, or, the identity can be over a region of at least about 50, 60, 70, 80, 90, 100, 150, 200, 250, 300, 350, 400, 450, 500, 550, 600, 650, 700 or more residues. Polypeptides of the invention can also be shorter than the full length of exemplary polypeptides. In alternative aspects, the invention provides polypeptides (peptides, fragments) ranging in size between about 5 and the full length of a polypeptide, e.g., an enzyme, such as a transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase; exemplary sizes being of about 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 100, 125, 150, 175, 200, 250, 300, 350, 400, 450, 500, 550, 600, 650, 700, or more residues, e.g., contiguous residues of an exemplary transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase of the invention.
Peptides of the invention (e.g., a subsequence of an exemplary polypeptide of the invention) can be useful as, e.g., labeling probes, antigens, toleragens, motifs, active sites (e.g., “catalytic domains”), signal sequences and/or prepro domains.
Polypeptides and peptides of the invention can be isolated from natural sources, be synthetic, or be recombinantly generated polypeptides. Peptides and proteins can be recombinantly expressed in vitro or in vivo. The peptides and polypeptides of the invention can be made and isolated using any method known in the art. Polypeptide and peptides of the invention can also be synthesized, whole or in part, using chemical methods well known in the art. See e.g., Caruthers (1980) Nucleic Acids Res. Symp. Ser. 215-223; Horn (1980) Nucleic Acids Res. Symp. Ser. 225-232; Banga, A. K., Therapeutic Peptides and Proteins, Formulation, Processing and Delivery Systems (1995) Technomic Publishing Co., Lancaster, Pa. For example, peptide synthesis can be performed using various solid-phase techniques (see e.g., Roberge (1995) Science 269:202; Merrifield (1997) Methods Enzymol. 289:3-13) and automated synthesis may be achieved, e.g., using the ABI 431A Peptide Synthesizer (Perkin Elmer) in accordance with the instructions provided by the manufacturer.
The peptides and polypeptides of the invention can also be glycosylated. The glycosylation can be added post-translationally either chemically or by cellular biosynthetic mechanisms, wherein the later incorporates the use of known glycosylation motifs, which can be native to the sequence or can be added as a peptide or added in the nucleic acid coding sequence. The glycosylation can be O-linked or N-linked.
“Amino acid” or “amino acid sequence” as used herein refer to an oligopeptide, peptide, polypeptide, or protein sequence, or to a fragment, portion, or subunit of any of these and to naturally occurring or synthetic molecules. “Amino acid” or “amino acid sequence” include an oligopeptide, peptide, polypeptide, or protein sequence, or to a fragment, portion, or subunit of any of these, and to naturally occurring or synthetic molecules. The term “polypeptide” as used herein, refers to amino acids joined to each other by peptide bonds or modified peptide bonds, i.e., peptide isosteres and may contain modified amino acids other than the 20 gene-encoded amino acids. The polypeptides may be modified by either natural processes, such as post-translational processing, or by chemical modification techniques that are well known in the art. Modifications can occur anywhere in the polypeptide, including the peptide backbone, the amino acid side-chains and the amino or carboxyl termini. It will be appreciated that the same type of modification may be present in the same or varying degrees at several sites in a given polypeptide. Also a given polypeptide may have many types of modifications. Modifications include acetylation, acylation, ADP-ribosylation, amidation, covalent attachment of flavin, covalent attachment of a heme moiety, covalent attachment of a nucleotide or nucleotide derivative, covalent attachment of a lipid or lipid derivative, covalent attachment of a phosphytidylinositol, cross-linking cyclization, disulfide bond formation, demethylation, formation of covalent cross-links, formation of cysteine, formation of pyroglutamate, formylation, gamma-carboxylation, glycosylation, GPI anchor formation, hydroxylation, iodination, methylation, myristolyation, oxidation, pegylation, phosphorylation, prenylation, racemization, selenoylation, sulfation and transfer-RNA mediated addition of amino acids to protein such as arginylation. (See Creighton, T. E., Proteins—Structure and Molecular Properties 2nd Ed., W.H. Freeman and Company, New York (1993); Posttranslational Covalent Modification of Proteins, B. C. Johnson, Ed., Academic Press, New York, pp. 1-12 (1983)). The peptides and polypeptides of the invention also include all “mimetic” and “peptidomimetic” forms, as described in further detail, below.
“Recombinant” polypeptides or proteins refer to polypeptides or proteins produced by recombinant DNA techniques; i.e., produced from cells transformed by an exogenous DNA construct encoding the desired polypeptide or protein. “Synthetic” nucleic acids (including oligonucleotides), polypeptides or proteins of the invention include those prepared by any chemical synthesis, e.g., as described, below. Solid-phase chemical peptide synthesis methods can also be used to synthesize the polypeptide or fragments of the invention. Such method have been known in the art since the early 1960's (Merrifield, R. B., J. Am. Chem. Soc., 85:2149-2154, 1963) (See also Stewart, J. M. and Young, J. D., Solid Phase Peptide Synthesis, 2nd Ed., Pierce Chemical Co., Rockford, Ill., pp. 11-12)) and have recently been employed in commercially available laboratory peptide design and synthesis kits (Cambridge Research Biochemicals). Such commercially available laboratory kits have generally utilized the teachings of H. M. Geysen et al, Proc. Natl. Acad. Sci., USA, 81:3998 (1984) and provide for synthesizing peptides upon the tips of a multitude of “rods” or “pins” all of which are connected to a single plate. When such a system is utilized, a plate of rods or pins is inverted and inserted into a second plate of corresponding wells or reservoirs, which contain solutions for attaching or anchoring an appropriate amino acid to the pin's or rod's tips. By repeating such a process step, i.e., inverting and inserting the rod's and pin's tips into appropriate solutions, amino acids are built into desired peptides. In addition, a number of available FMOC peptide synthesis systems are available. For example, assembly of a polypeptide or fragment can be carried out on a solid support using an Applied Biosystems, Inc. Model 431A automated peptide synthesizer. Such equipment provides ready access to the peptides of the invention, either by direct synthesis or by synthesis of a series of fragments that can be coupled using other known techniques.
“Fragments” as used herein are a portion of a naturally occurring protein which can exist in at least two different conformations. Fragments can have the same or substantially the same amino acid sequence as the naturally occurring protein. “Substantially the same” means that an amino acid sequence is largely, but not entirely, the same, but retains at least one functional activity of the sequence to which it is related. In general two amino acid sequences are “substantially the same” or “substantially homologous” if they are at least about 85% identical. Fragments which have different three dimensional structures as the naturally occurring protein are also included. An example of this, is a “pro-form” molecule, such as a low activity proprotein that can be modified by cleavage to produce a mature enzyme with significantly higher activity.
The peptides and polypeptides of the invention, as defined above, include all “mimetic” and “peptidomimetic” forms. The terms “mimetic” and “peptidomimetic” refer to a synthetic chemical compound which has substantially the same structural and/or functional characteristics of the polypeptides of the invention. The mimetic can be either entirely composed of synthetic, non-natural analogues of amino acids, or, is a chimeric molecule of partly natural peptide amino acids and partly non-natural analogs of amino acids. The mimetic can also incorporate any amount of natural amino acid conservative substitutions as long as such substitutions also do not substantially alter the mimetic's structure and/or activity. As with polypeptides of the invention which are conservative variants, routine experimentation will determine whether a mimetic is within the scope of the invention, i.e., that its structure and/or function is not substantially altered. Thus, in one aspect, a mimetic composition is within the scope of the invention if it has a transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase activity.
Polypeptide mimetic compositions of the invention can contain any combination of non-natural structural components. In alternative aspect, mimetic compositions of the invention include one or all of the following three structural groups: a) residue linkage groups other than the natural amide bond (“peptide bond”) linkages; b) non-natural residues in place of naturally occurring amino acid residues; or c) residues which induce secondary structural mimicry, i.e., to induce or stabilize a secondary structure, e.g., a beta turn, gamma turn, beta sheet, alpha helix conformation, and the like. For example, a polypeptide of the invention can be characterized as a mimetic when all or some of its residues are joined by chemical means other than natural peptide bonds. Individual peptidomimetic residues can be joined by peptide bonds, other chemical bonds or coupling means, such as, e.g., glutaraldehyde, N-hydroxysuccinimide esters, bifunctional maleimides, N,N′-dicyclohexylcarbodiimide (DCC) or N,N′-diisopropylcarbodiimide (DIC). Linking groups that can be an alternative to the traditional amide bond (“peptide bond”) linkages include, e.g., ketomethylene (e.g., —C(C═O)—CH2— for —C(═O)—NH—), aminomethylene (CH2—NH), ethylene, olefin (CH═CH), ether (CH2—O), thioether (CH2—S), tetrazole (CN4—), thiazole, retroamide, thioamide, or ester (see, e.g., Spatola (1983) in Chemistry and Biochemistry of Amino Acids, Peptides and Proteins, Vol. 7, pp 267-357, “Peptide Backbone Modifications,” Marcell Dekker, NY).
A polypeptide of the invention can also be characterized as a mimetic by containing all or some non-natural residues in place of naturally occurring amino acid residues. Non-natural residues are well described in the scientific and patent literature; a few exemplary non-natural compositions useful as mimetics of natural amino acid residues and guidelines are described below. Mimetics of aromatic amino acids can be generated by replacing by, e.g., D- or L-naphylalanine; D- or L-phenylglycine; D- or L-2 thieneylalanine; D- or L-1, -2, 3-, or 4-pyreneylalanine; D- or L-3 thieneylalanine; D- or L-(2-pyridinyl)-alanine; D- or L-(3-pyridinyl)-alanine; D- or L-(2-pyrazinyl)-alanine; D- or L-(4-isopropyl)-phenylglycine; D-(trifluoromethyl)-phenylglycine; D-(trifluoromethyl)-phenylalanine; D-p-fluoro-phenylalanine; D- or L-p-biphenylphenylalanine; D- or L-p-methoxy-biphenylphenylalanine; D- or L-2-indole(alkyl)alanines; and, D- or L-alkylainines, where alkyl can be substituted or unsubstituted methyl, ethyl, propyl, hexyl, butyl, pentyl, isopropyl, iso-butyl, sec-isotyl, iso-pentyl, or a non-acidic amino acids. Aromatic rings of a non-natural amino acid include, e.g., thiazolyl, thiophenyl, pyrazolyl, benzimidazolyl, naphthyl, furanyl, pyrrolyl, and pyridyl aromatic rings.
Mimetics of acidic amino acids can be generated by substitution by, e.g., non-carboxylate amino acids while maintaining a negative charge; (phosphono)alanine; sulfated threonine. Carboxyl side groups (e.g., aspartyl or glutamyl) can also be selectively modified by reaction with carbodiimides (R′—N—C—N—R′) such as, e.g., 1-cyclohexyl-3(2-morpholinyl-(4-ethyl) carbodiimide or 1-ethyl-3(4-azonia-4,4-dimetholpentyl) carbodiimide Aspartyl or glutamyl can also be converted to asparaginyl and glutaminyl residues by reaction with ammonium ions. Mimetics of basic amino acids can be generated by substitution with, e.g., (in addition to lysine and arginine) the amino acids ornithine, citrulline, or (guanidino)-acetic acid, or (guanidino)alkyl-acetic acid, where alkyl is defined above. Nitrile derivative (e.g., containing the CN-moiety in place of COOH) can be substituted for asparagine or glutamine. Asparaginyl and glutaminyl residues can be deaminated to the corresponding aspartyl or glutamyl residues. Arginine residue mimetics can be generated by reacting arginyl with, e.g., one or more conventional reagents, including, e.g., phenylglyoxal, 2,3-butanedione, 1,2-cyclo-hexanedione, or ninhydrin, preferably under alkaline conditions. Tyrosine residue mimetics can be generated by reacting tyrosyl with, e.g., aromatic diazonium compounds or tetranitromethane. N-acetylimidizol and tetranitromethane can be used to form 0-acetyl tyrosyl species and 3-nitro derivatives, respectively. Cysteine residue mimetics can be generated by reacting cysteinyl residues with, e.g., alpha-haloacetates such as 2-chloroacetic acid or chloroacetamide and corresponding amines; to give carboxymethyl or carboxyamidomethyl derivatives. Cysteine residue mimetics can also be generated by reacting cysteinyl residues with, e.g., bromo-trifluoroacetone, alpha-bromo-beta-(5-imidozoyl) propionic acid; chloroacetyl phosphate, N-alkylmaleimides, 3-nitro-2-pyridyl disulfide; methyl 2-pyridyl disulfide; p-chloromercuribenzoate; 2-chloromercuri-4 nitrophenol; or, chloro-7-nitrobenzo-oxa-1,3-diazole. Lysine mimetics can be generated (and amino terminal residues can be altered) by reacting lysinyl with, e.g., succinic or other carboxylic acid anhydrides. Lysine and other alpha-amino-containing residue mimetics can also be generated by reaction with imidoesters, such as methyl picolinimidate, pyridoxal phosphate, pyridoxal, chloroborohydride, trinitro-benzenesulfonic acid, O-methylisourea, 2,4, pentanedione, and transamidase-catalyzed reactions with glyoxylate. Mimetics of methionine can be generated by reaction with, e.g., methionine sulfoxide. Mimetics of proline include, e.g., pipecolic acid, thiazolidine carboxylic acid, 3- or 4-hydroxy proline, dehydroproline, 3- or 4-methylproline, or 3,3,-dimethylproline. Histidine residue mimetics can be generated by reacting histidyl with, e.g., diethylprocarbonate or para-bromophenacyl bromide. Other mimetics include, e.g., those generated by hydroxylation of proline and lysine; phosphorylation of the hydroxyl groups of seryl or threonyl residues; methylation of the alpha-amino groups of lysine, arginine and histidine; acetylation of the N-terminal amine; methylation of main chain amide residues or substitution with N-methyl amino acids; or amidation of C-terminal carboxyl groups.
A residue, e.g., an amino acid, of a polypeptide of the invention can also be replaced by an amino acid (or peptidomimetic residue) of the opposite chirality. Thus, any amino acid naturally occurring in the L-configuration (which can also be referred to as the R or S, depending upon the structure of the chemical entity) can be replaced with the amino acid of the same chemical structural type or a peptidomimetic, but of the opposite chirality, referred to as the D-amino acid, but also can be referred to as the R- or S-form.
The invention also provides methods for modifying the polypeptides of the invention by either natural processes, such as post-translational processing (e.g., phosphorylation, acylation, etc), or by chemical modification techniques, and the resulting modified polypeptides. Modifications can occur anywhere in the polypeptide, including the peptide backbone, the amino acid side-chains and the amino or carboxyl termini. It will be appreciated that the same type of modification may be present in the same or varying degrees at several sites in a given polypeptide. Also a given polypeptide may have many types of modifications. Modifications include acetylation, acylation, ADP-ribosylation, amidation, covalent attachment of flavin, covalent attachment of a heme moiety, covalent attachment of a nucleotide or nucleotide derivative, covalent attachment of a lipid or lipid derivative, covalent attachment of a phosphatidylinositol, cross-linking cyclization, disulfide bond formation, demethylation, formation of covalent cross-links, formation of cysteine, formation of pyroglutamate, formylation, gamma-carboxylation, glycosylation, GPI anchor formation, hydroxylation, iodination, methylation, myristolyation, oxidation, pegylation, proteolytic processing, phosphorylation, prenylation, racemization, selenoylation, sulfation, and transfer-RNA mediated addition of amino acids to protein such as arginylation. See, e.g., Creighton, T. E., Proteins—Structure and Molecular Properties 2nd Ed., W.H. Freeman and Company, New York (1993); Posttranslational Covalent Modification of Proteins, B. C. Johnson, Ed., Academic Press, New York, pp. 1-12 (1983).
Solid-phase chemical peptide synthesis methods can also be used to synthesize the polypeptide or fragments of the invention. Such method have been known in the art since the early 1960's (Merrifield, R. B., J. Am. Chem. Soc., 85:2149-2154, 1963) (See also Stewart, J. M. and Young, J. D., Solid Phase Peptide Synthesis, 2nd Ed., Pierce Chemical Co., Rockford, Ill., pp. 11-12)) and have recently been employed in commercially available laboratory peptide design and synthesis kits (Cambridge Research Biochemicals). Such commercially available laboratory kits have generally utilized the teachings of H. M. Geysen et al, Proc. Natl. Acad. Sci., USA, 81:3998 (1984) and provide for synthesizing peptides upon the tips of a multitude of “rods” or “pins” all of which are connected to a single plate. When such a system is utilized, a plate of rods or pins is inverted and inserted into a second plate of corresponding wells or reservoirs, which contain solutions for attaching or anchoring an appropriate amino acid to the pin's or rod's tips. By repeating such a process step, i.e., inverting and inserting the rod's and pin's tips into appropriate solutions, amino acids are built into desired peptides. In addition, a number of available FMOC peptide synthesis systems are available. For example, assembly of a polypeptide or fragment can be carried out on a solid support using an Applied Biosystems, Inc. Model 431ATM automated peptide synthesizer. Such equipment provides ready access to the peptides of the invention, either by direct synthesis or by synthesis of a series of fragments that can be coupled using other known techniques.
The invention includes transferases, e.g., transaminases, e.g., d-amino-acid transferases, and/or oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases of the invention with and without signal. The polypeptide comprising a signal sequence of the invention can be a transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase of the invention or another transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase or another enzyme or other polypeptide.
The invention includes immobilized transferases, e.g., transaminases, e.g., d-amino-acid transferases, and/or oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases and anti-transferase, e.g., anti-transaminase, e.g., anti-d-amino-acid transferase, and/or anti-oxidoreductase, e.g., anti-dehydrogenase, e.g., anti-d-amino-acid dehydrogenase antibodies and fragments thereof. The invention provides methods for inhibiting transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase activity, e.g., using dominant negative mutants or anti-transferase, e.g., anti-transaminase, e.g., anti-d-amino-acid transferase, and/or anti-oxidoreductase, e.g., anti-dehydrogenase, e.g., anti-d-amino-acid dehydrogenase antibodies of the invention. The invention includes heterocomplexes, e.g., fusion proteins, heterodimers, etc., comprising the transferases, e.g., transaminases, e.g., d-amino-acid transferases, and/or oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases of the invention.
Polypeptides of the invention can have a transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase activity under various conditions, e.g., extremes in pH and/or temperature, oxidizing agents, and the like. The invention provides methods leading to alternative transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase preparations with different catalytic efficiencies and stabilities, e.g., towards temperature, oxidizing agents and changing wash conditions. In one aspect, transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase variants can be produced using techniques of site-directed mutagenesis and/or random mutagenesis. In one aspect, directed evolution can be used to produce a great variety of transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase variants with alternative specificities and stability.
The proteins of the invention are also useful as research reagents to identify transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase modulators, e.g., activators or inhibitors of transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase activity. Briefly, test samples (compounds, broths, extracts, and the like) are added to transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase assays to determine their ability to inhibit substrate cleavage Inhibitors identified in this way can be used in industry and research to reduce or prevent undesired proteolysis Inhibitors can be combined to increase the spectrum of activity.
The enzymes of the invention are also useful as research reagents to digest proteins or in protein sequencing. For example, the transferases, e.g., transaminases, e.g., d-amino-acid transferases, and/or oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases may be used to break polypeptides into smaller fragments for sequencing using, e.g. an automated sequencer.
The invention also provides methods of discovering new transferases, e.g., transaminases, e.g., d-amino-acid transferases, and/or oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases using the nucleic acids, polypeptides and antibodies of the invention. In one aspect, phagemid libraries are screened for expression-based discovery of transferases, e.g., transaminases, e.g., d-amino-acid transferases, and/or oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases. In another aspect, lambda phage libraries are screened for expression-based discovery of transferases, e.g., transaminases, e.g., d-amino-acid transferases, and/or oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases. Screening of the phage or phagemid libraries can allow the detection of toxic clones; improved access to substrate; reduced need for engineering a host, by-passing the potential for any bias resulting from mass excision of the library; and, faster growth at low clone densities. Screening of phage or phagemid libraries can be in liquid phase or in solid phase. In one aspect, the invention provides screening in liquid phase. This gives a greater flexibility in assay conditions; additional substrate flexibility; higher sensitivity for weak clones; and ease of automation over solid phase screening.
The invention provides screening methods using the proteins and nucleic acids of the invention and robotic automation to enable the execution of many thousands of biocatalytic reactions and screening assays in a short period of time, e.g., per day, as well as ensuring a high level of accuracy and reproducibility (see discussion of arrays, below). As a result, a library of derivative compounds can be produced in a matter of weeks. For further teachings on modification of molecules, including small molecules, see PCT/US94/09174.
Another aspect of the invention is an isolated or purified polypeptide comprising the sequence of one of the invention and sequences substantially identical thereto, or fragments comprising at least about 5, 10, 15, 20, 25, 30, 35, 40, 50, 75, 100, or 150 consecutive amino acids thereof. As discussed above, such polypeptides may be obtained by inserting a nucleic acid encoding the polypeptide into a vector such that the coding sequence is operably linked to a sequence capable of driving the expression of the encoded polypeptide in a suitable host cell. For example, the expression vector may comprise a promoter, a ribosome binding site for translation initiation and a transcription terminator. The vector may also include appropriate sequences for amplifying expression.
Another aspect of the invention is polypeptides or fragments thereof which have at least about 50%, at least about 55%, at least about 60%, at least about 65%, at least about 70%, at least about 75%, at least about 80%, at least about 85%, at least about 90%, at least about 95%, or more than about 95% homology to one of the polypeptides of the invention and sequences substantially identical thereto, or a fragment comprising at least 5, 10, 15, 20, 25, 30, 35, 40, 50, 75, 100, or 150 consecutive amino acids thereof. Homology may be determined using any of the programs described above which aligns the polypeptides or fragments being compared and determines the extent of amino acid identity or similarity between them. It will be appreciated that amino acid “homology” includes conservative amino acid substitutions such as those described above.
The polypeptides or fragments having homology to one of the polypeptides of the invention, or a fragment comprising at least about 5, 10, 15, 20, 25, 30, 35, 40, 50, 75, 100, or 150 consecutive amino acids thereof may be obtained by isolating the nucleic acids encoding them using the techniques described above.
Alternatively, the homologous polypeptides or fragments may be obtained through biochemical enrichment or purification procedures. The sequence of potentially homologous polypeptides or fragments may be determined by gel electrophoresis and/or microsequencing. The sequence of the prospective homologous polypeptide or fragment can be compared to one of the polypeptides of the invention, or a fragment comprising at least about 5, 10, 15, 20, 25, 30, 35, 40, 50, 75, 100, or 150 consecutive amino acids thereof using any of the programs described above.
Another aspect of the invention is an assay for identifying fragments or variants of The invention, which retain the enzymatic function of the polypeptides of the invention. For example the fragments or variants of said polypeptides, may be used to catalyze biochemical reactions, which indicate that the fragment or variant retains the enzymatic activity of the polypeptides of the invention.
The assay for determining if fragments of variants retain the enzymatic activity of the polypeptides of the invention includes the steps of: contacting the polypeptide fragment or variant with a substrate molecule under conditions which allow the polypeptide fragment or variant to function and detecting either a decrease in the level of substrate or an increase in the level of the specific reaction product of the reaction between the polypeptide and substrate.
The present invention exploits the unique catalytic properties of enzymes. Whereas the use of biocatalysts (i.e., purified or crude enzymes, non-living or living cells) in chemical transformations normally requires the identification of a particular biocatalyst that reacts with a specific starting compound, the present invention uses selected biocatalysts and reaction conditions that are specific for functional groups that are present in many starting compounds, such as small molecules. Each biocatalyst is specific for one functional group, or several related functional groups and can react with many starting compounds containing this functional group.
The biocatalytic reactions produce a population of derivatives from a single starting compound. These derivatives can be subjected to another round of biocatalytic reactions to produce a second population of derivative compounds. Thousands of variations of the original small molecule or compound can be produced with each iteration of biocatalytic derivatization.
Enzymes react at specific sites of a starting compound without affecting the rest of the molecule, a process which is very difficult to achieve using traditional chemical methods. This high degree of biocatalytic specificity provides the means to identify a single active compound within the library. The library is characterized by the series of biocatalytic reactions used to produce it, a so called “biosynthetic history”. Screening the library for biological activities and tracing the biosynthetic history identifies the specific reaction sequence producing the active compound. The reaction sequence is repeated and the structure of the synthesized compound determined. This mode of identification, unlike other synthesis and screening approaches, does not require immobilization technologies and compounds can be synthesized and tested free in solution using virtually any type of screening assay. It is important to note, that the high degree of specificity of enzyme reactions on functional groups allows for the “tracking” of specific enzymatic reactions that make up the biocatalytically produced library.
Many of the procedural steps are performed using robotic automation enabling the execution of many thousands of biocatalytic reactions and screening assays per day as well as ensuring a high level of accuracy and reproducibility. As a result, a library of derivative compounds can be produced in a matter of weeks which would take years to produce using current chemical methods.
In a particular aspect, the invention provides a method for modifying small molecules, comprising contacting a polypeptide encoded by a polynucleotide described herein or enzymatically active fragments thereof with a small molecule to produce a modified small molecule. A library of modified small molecules is tested to determine if a modified small molecule is present within the library which exhibits a desired activity. A specific biocatalytic reaction which produces the modified small molecule of desired activity is identified by systematically eliminating each of the biocatalytic reactions used to produce a portion of the library and then testing the small molecules produced in the portion of the library for the presence or absence of the modified small molecule with the desired activity. The specific biocatalytic reactions which produce the modified small molecule of desired activity is in one aspect (optionally) repeated. The biocatalytic reactions are conducted with a group of biocatalysts that react with distinct structural moieties found within the structure of a small molecule, each biocatalyst is specific for one structural moiety or a group of related structural moieties; and each biocatalyst reacts with many different small molecules which contain the distinct structural moiety.
Transaminase and/or Oxidoreductase Signal Sequences, Prepro and Catalytic Domains
The invention provides transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase signal sequences (e.g., signal peptides (SPs)), prepro domains and catalytic domains (CDs). The SPs, prepro domains and/or CDs of the invention can be isolated, synthetic or recombinant peptides or can be part of a fusion protein, e.g., as a heterologous domain in a chimeric protein. The invention provides nucleic acids encoding these catalytic domains (CDs), prepro domains and signal sequences (SPs, e.g., a peptide having a sequence comprising/consisting of amino terminal residues of a polypeptide of the invention). In one aspect, the invention provides a signal sequence comprising a peptide comprising/consisting of a sequence as set forth in residues 1 to 12, 1 to 13, 1 to 14, 1 to 15, 1 to 16, 1 to 17, 1 to 18, 1 to 19, 1 to 20, 1 to 21, 1 to 22, 1 to 23, 1 to 24, 1 to 25, 1 to 26, 1 to 27, 1 to 28, 1 to 28, 1 to 30, 1 to 31, 1 to 32, 1 to 33, 1 to 34, 1 to 35, 1 to 36, 1 to 37, 1 to 38, 1 to 39, 1 to 40, 1 to 41, 1 to 42, 1 to 43, 1 to 44, 1 to 45, 1 to 46, 1 to 47, 1 to 48, 1 to 49 or 1 to 50, of a polypeptide of the invention.
The transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase signal sequences (SPs) and/or prepro sequences of the invention can be isolated peptides, or, sequences joined to another transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase or a non-transferase, e.g., non-transaminase, e.g., non-d-amino-acid transferase, and/or non-oxidoreductase, e.g., non-dehydrogenase, e.g., non-d-amino-acid dehydrogenase polypeptide, e.g., as a fusion (chimeric) protein. In one aspect, the invention provides polypeptides comprising transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase signal sequences of the invention. In one aspect, polypeptides comprising transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase signal sequences SPs and/or prepro of the invention comprise sequences heterologous to a transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase of the invention (e.g., a fusion protein comprising an SP and/or prepro of the invention and sequences from another transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase or a non-transferase, e.g., non-transaminase, e.g., non-d-amino-acid transferase, and/or non-oxidoreductase, e.g., non-dehydrogenase, e.g., non-d-amino-acid dehydrogenase polypeptide protein). In one aspect, the invention provides transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase of the invention with heterologous SPs and/or prepro sequences, e.g., sequences with a yeast signal sequence. A transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase of the invention can comprise a heterologous SP and/or prepro in a vector, e.g., a pPIC series vector (Invitrogen, Carlsbad, Calif.).
In one aspect, SPs and/or prepro sequences of the invention are identified following identification of novel transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase polypeptides. The pathways by which proteins are sorted and transported to their proper cellular location are often referred to as protein targeting pathways. One of the most important elements in all of these targeting systems is a short amino acid sequence at the amino terminus of a newly synthesized polypeptide called the signal sequence. This signal sequence directs a protein to its appropriate location in the cell and is removed during transport or when the protein reaches its final destination. Most lysosomal, membrane, or secreted proteins have an amino-terminal signal sequence that marks them for translocation into the lumen of the endoplasmic reticulum. More than 100 signal sequences for proteins in this group have been determined. The signal sequences can vary in length from between about 10 to 50 amino acid residues. Various methods of recognition of signal sequences are known to those of skill in the art. For example, in one aspect, novel transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase signal peptides are identified by a method referred to as SignalP. SignalP uses a combined neural network which recognizes both signal peptides and their cleavage sites; see, e.g., Nielsen (1997) “Identification of prokaryotic and eukaryotic signal peptides and prediction of their cleavage sites.” Protein Engineering 10:1-6.
It should be understood that in some aspects transferases, e.g., transaminases, e.g., d-amino-acid transferases, and/or oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases of the invention may not have SPs and/or prepro sequences, or “domains.” In one aspect, the invention provides the transferases, e.g., transaminases, e.g., d-amino-acid transferases, and/or oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases of the invention lacking all or part of an SP and/or a prepro domain. In one aspect, the invention provides a nucleic acid sequence encoding a signal sequence (SP) and/or prepro from one transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase operably linked to a nucleic acid sequence of a different transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase or, in one aspect (optionally), a signal sequence (SPs) and/or prepro domain from a non-transferase, e.g., non-transaminase, e.g., non-d-amino-acid transferase, and/or non-oxidoreductase, e.g., non-dehydrogenase, e.g., non-d-amino-acid dehydrogenase protein may be desired.
The invention also provides isolated, synthetic or recombinant polypeptides comprising signal sequences (SPs), prepro domain and/or catalytic domains (CDs) of the invention and heterologous sequences. The heterologous sequences are sequences not naturally associated (e.g., to a transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase) with an SP, prepro domain and/or CD. The sequence to which the SP, prepro domain and/or CD are not naturally associated can be on the SP's, prepro domain and/or CD's amino terminal end, carboxy terminal end, and/or on both ends of the SP and/or CD. In one aspect, the invention provides an isolated, synthetic or recombinant polypeptide comprising (or consisting of) a polypeptide comprising a signal sequence (SP), prepro domain and/or catalytic domain (CD) of the invention with the proviso that it is not associated with any sequence to which it is naturally associated (e.g., a transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase sequence). Similarly in one aspect, the invention provides isolated, synthetic or recombinant nucleic acids encoding these polypeptides. Thus, in one aspect, the isolated, synthetic or recombinant nucleic acid of the invention comprises coding sequence for a signal sequence (SP), prepro domain and/or catalytic domain (CD) of the invention and a heterologous sequence (i.e., a sequence not naturally associated with the a signal sequence (SP), prepro domain and/or catalytic domain (CD) of the invention). The heterologous sequence can be on the 3′ terminal end, 5′ terminal end, and/or on both ends of the SP, prepro domain and/or CD coding sequence.
Hybrid (Chimeric) Transferases and/or Oxidoreductases and Peptide Libraries
In one aspect, the invention provides hybrid transferases, e.g., transaminases, e.g., d-amino-acid transferases, and/or oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases and fusion proteins, including peptide libraries, comprising sequences of the invention. The peptide libraries of the invention can be used to isolate peptide modulators (e.g., activators or inhibitors) of targets, such as transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase substrates, receptors, enzymes. The peptide libraries of the invention can be used to identify formal binding partners of targets, such as ligands, e.g., cytokines, hormones and the like. In one aspect, the invention provides chimeric proteins comprising a signal sequence (SP), prepro domain and/or catalytic domain (CD) of the invention or a combination thereof and a heterologous sequence (see above).
In one aspect, the fusion proteins of the invention (e.g., the peptide moiety) are conformationally stabilized (relative to linear peptides) to allow a higher binding affinity for targets. The invention provides fusions of transferases, e.g., transaminases, e.g., d-amino-acid transferases, and/or oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases of the invention and other peptides, including known and random peptides. They can be fused in such a manner that the structure of the transferases, e.g., transaminases, e.g., d-amino-acid transferases, and/or oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases is not significantly perturbed and the peptide is metabolically or structurally conformationally stabilized. This allows the creation of a peptide library that is easily monitored both for its presence within cells and its quantity.
Amino acid sequence variants of the invention can be characterized by a predetermined nature of the variation, a feature that sets them apart from a naturally occurring form, e.g., an allelic or interspecies variation of a transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase sequence. In one aspect, the variants of the invention exhibit the same qualitative biological activity as the naturally occurring analogue. Alternatively, the variants can be selected for having modified characteristics. In one aspect, while the site or region for introducing an amino acid sequence variation is predetermined, the mutation per se need not be predetermined. For example, in order to optimize the performance of a mutation at a given site, random mutagenesis may be conducted at the target codon or region and the expressed transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase variants screened for the optimal combination of desired activity. Techniques for making substitution mutations at predetermined sites in DNA having a known sequence are well known, as discussed herein for example, M13 primer mutagenesis and PCR mutagenesis. Screening of the mutants can be done using, e.g., assays of transaminase and/or oxidoreductase activity. In alternative aspects, amino acid substitutions can be single residues; insertions can be on the order of from about 1 to 20 amino acids, although considerably larger insertions can be done. Deletions can range from about 1 to about 20, 30, 40, 50, 60, 70 residues or more. To obtain a final derivative with the optimal properties, substitutions, deletions, insertions or any combination thereof may be used. Generally, these changes are done on a few amino acids to minimize the alteration of the molecule. However, larger changes may be tolerated in certain circumstances.
The invention provides transferases, e.g., transaminases, e.g., d-amino-acid transferases, and/or oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases where the structure of the polypeptide backbone, the secondary or the tertiary structure, e.g., an alpha-helical or beta-sheet structure, has been modified. In one aspect, the charge or hydrophobicity has been modified. In one aspect, the bulk of a side chain has been modified. Substantial changes in function or immunological identity are made by selecting substitutions that are less conservative. For example, substitutions can be made which more significantly affect: the structure of the polypeptide backbone in the area of the alteration, for example a alpha-helical or a beta-sheet structure; a charge or a hydrophobic site of the molecule, which can be at an active site; or a side chain. The invention provides substitutions in polypeptide of the invention where (a) a hydrophilic residues, e.g. seryl or threonyl, is substituted for (or by) a hydrophobic residue, e.g. leucyl, isoleucyl, phenylalanyl, valyl or alanyl; (b) a cysteine or proline is substituted for (or by) any other residue; (c) a residue having an electropositive side chain, e.g. lysyl, arginyl, or histidyl, is substituted for (or by) an electronegative residue, e.g. glutamyl or aspartyl; or (d) a residue having a bulky side chain, e.g. phenylalanine, is substituted for (or by) one not having a side chain, e.g. glycine. The variants can exhibit the same qualitative biological activity (i.e. transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase activity) although variants can be selected to modify the characteristics of the transferases, e.g., transaminases, e.g., d-amino-acid transferases, and/or oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases as needed.
In one aspect, transferases, e.g., transaminases, e.g., d-amino-acid transferases, and/or oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases of the invention comprise epitopes or purification tags, signal sequences or other fusion sequences, etc. In one aspect, the transferases, e.g., transaminases, e.g., d-amino-acid transferases, and/or oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases of the invention can be fused to a random peptide to form a fusion polypeptide. By “fused” or “operably linked” herein is meant that the random peptide and the transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase are linked together, in such a manner as to minimize the disruption to the stability of the structure, e.g., it retains transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase activity. The fusion polypeptide (or fusion polynucleotide encoding the fusion polypeptide) can comprise further components as well, including multiple peptides at multiple loops.
In one aspect, the peptides and nucleic acids encoding them are randomized, either fully randomized or they are biased in their randomization, e.g. in nucleotide/residue frequency generally or per position. “Randomized” means that each nucleic acid and peptide consists of essentially random nucleotides and amino acids, respectively. In one aspect, the nucleic acids which give rise to the peptides can be chemically synthesized, and thus may incorporate any nucleotide at any position. Thus, when the nucleic acids are expressed to form peptides, any amino acid residue may be incorporated at any position. The synthetic process can be designed to generate randomized nucleic acids, to allow the formation of all or most of the possible combinations over the length of the nucleic acid, thus forming a library of randomized nucleic acids. The library can provide a sufficiently structurally diverse population of randomized expression products to affect a probabilistically sufficient range of cellular responses to provide one or more cells exhibiting a desired response. Thus, the invention provides an interaction library large enough so that at least one of its members will have a structure that gives it affinity for some molecule, protein, or other factor.
Transferases, e.g., transaminases, e.g., d-amino-acid transferases, and/or oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases are multidomain enzymes that consist in one aspect (optionally) of a signal peptide, a binding domain, a catalytic domain, a linker and/or another catalytic domain.
The invention provides a means for generating chimeric polypeptides which may encode biologically active hybrid polypeptides (e.g., hybrid transferases, e.g., transaminases, e.g., d-amino-acid transferases, and/or oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases). In one aspect, the original polynucleotides encode biologically active polypeptides. The method of the invention produces new hybrid polypeptides by utilizing cellular processes which integrate the sequence of the original polynucleotides such that the resulting hybrid polynucleotide encodes a polypeptide demonstrating activities derived from the original biologically active polypeptides. For example, the original polynucleotides may encode a particular enzyme from different microorganisms. An enzyme encoded by a first polynucleotide from one organism or variant may, for example, function effectively under a particular environmental condition, e.g. high salinity. An enzyme encoded by a second polynucleotide from a different organism or variant may function effectively under a different environmental condition, such as extremely high temperatures. A hybrid polynucleotide containing sequences from the first and second original polynucleotides may encode an enzyme which exhibits characteristics of both enzymes encoded by the original polynucleotides. Thus, the enzyme encoded by the hybrid polynucleotide may function effectively under environmental conditions shared by each of the enzymes encoded by the first and second polynucleotides, e.g., high salinity and extreme temperatures.
A hybrid polypeptide resulting from the method of the invention may exhibit specialized enzyme activity not displayed in the original enzymes. For example, following recombination and/or reductive reassortment of polynucleotides encoding transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase activities, the resulting hybrid polypeptide encoded by a hybrid polynucleotide can be screened for specialized transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase activities obtained from each of the original enzymes, i.e. the type of bond on which the transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase acts and the temperature at which the transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase functions. Thus, for example, the transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase may be screened to ascertain those chemical functionalities which distinguish the hybrid transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase from the original transferases, e.g., transaminases, e.g., d-amino-acid transferases, and/or oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases, for example, differences in activity at various temperatures, pH or salt concentration.
Sources of the original polynucleotides may be isolated from individual organisms (“isolates”), collections of organisms that have been grown in defined media (“enrichment cultures”), or, uncultivated organisms (“environmental samples”). The use of a culture-independent approach to derive polynucleotides encoding novel bioactivities from environmental samples is most preferable since it allows one to access untapped resources of biodiversity.
“Environmental libraries” are generated from environmental samples and represent the collective genomes of naturally occurring organisms archived in cloning vectors that can be propagated in suitable prokaryotic hosts. Because the cloned DNA is initially extracted directly from environmental samples, the libraries are not limited to the small fraction of prokaryotes that can be grown in pure culture. Additionally, a normalization of the environmental DNA present in these samples could allow more equal representation of the DNA from all of the species present in the original sample. This can dramatically increase the efficiency of finding interesting genes from minor constituents of the sample which may be under-represented by several orders of magnitude compared to the dominant species.
For example, gene libraries generated from one or more uncultivated microorganisms are screened for an activity of interest. Potential pathways encoding bioactive molecules of interest are first captured in prokaryotic cells in the form of gene expression libraries. Polynucleotides encoding activities of interest are isolated from such libraries and introduced into a host cell. The host cell is grown under conditions which promote recombination and/or reductive reassortment creating potentially active biomolecules with novel or enhanced activities.
Additionally, subcloning may be performed to further isolate sequences of interest. In subcloning, a portion of DNA is amplified, digested, generally by restriction enzymes, to cut out the desired sequence, the desired sequence is ligated into a recipient vector and is amplified. At each step in subcloning, the portion is examined for the activity of interest, in order to ensure that DNA that encodes the structural protein has not been excluded. The insert may be purified at any step of the subcloning, for example, by gel electrophoresis prior to ligation into a vector or where cells containing the recipient vector and cells not containing the recipient vector are placed on selective media containing, for example, an antibiotic, which will kill the cells not containing the recipient vector. Specific methods of subcloning cDNA inserts into vectors are well-known in the art (Sambrook et al., Molecular Cloning: A Laboratory Manual, 2nd Ed., Cold Spring Harbor Laboratory Press (1989)). In another aspect, the enzymes of the invention are subclones. Such subclones may differ from the parent clone by, for example, length, a mutation, a tag or a label.
The microorganisms from which the polynucleotide may be prepared include prokaryotic microorganisms, such as Eubacteria and Archaebacteria and lower eukaryotic microorganisms such as fungi, some algae and protozoa. Polynucleotides may be isolated from environmental samples in which case the nucleic acid may be recovered without culturing of an organism or recovered from one or more cultured organisms. In one aspect, such microorganisms may be extremophiles, such as hyperthermophiles, psychrophiles, psychrotrophs, halophiles, barophiles and acidophiles. Polynucleotides encoding enzymes isolated from extremophilic microorganisms can be used. Such enzymes may function at temperatures above 100° C. in terrestrial hot springs and deep sea thermal vents, at temperatures below 0° C. in arctic waters, in the saturated salt environment of the Dead Sea, at pH values around 0 in coal deposits and geothermal sulfur-rich springs, or at pH values greater than 11 in sewage sludge. For example, several esterases and lipases cloned and expressed from extremophilic organisms show high activity throughout a wide range of temperatures and pHs.
Polynucleotides selected and isolated as hereinabove described are introduced into a suitable host cell. A suitable host cell is any cell which is capable of promoting recombination and/or reductive reassortment. The selected polynucleotides are preferably already in a vector which includes appropriate control sequences. The host cell can be a higher eukaryotic cell, such as a mammalian cell, or a lower eukaryotic cell, such as a yeast cell, or preferably, the host cell can be a prokaryotic cell, such as a bacterial cell. Introduction of the construct into the host cell can be effected by calcium phosphate transfection, DEAE-Dextran mediated transfection, or electroporation (Davis et al., 1986).
As representative examples of appropriate hosts, there may be mentioned: bacterial cells, such as E. coli, Streptomyces, Salmonella typhimurium; fungal cells, such as yeast; insect cells such as Drosophila S2 and Spodoptera Sf9; animal cells such as CHO, COS or Bowes melanoma; adenoviruses; and plant cells. The selection of an appropriate host is deemed to be within the scope of those skilled in the art from the teachings herein.
With particular references to various mammalian cell culture systems that can be employed to express recombinant protein, examples of mammalian expression systems include the COS-7 lines of monkey kidney fibroblasts, described in “SV40-transformed simian cells support the replication of early SV40 mutants” (Gluzman, 1981) and other cell lines capable of expressing a compatible vector, for example, the C127, 3T3, CHO, HeLa and BHK cell lines. Mammalian expression vectors will comprise an origin of replication, a suitable promoter and enhancer and also any necessary ribosome binding sites, polyadenylation site, splice donor and acceptor sites, transcriptional termination sequences and 5′ flanking nontranscribed sequences. DNA sequences derived from the SV40 splice and polyadenylation sites may be used to provide the required nontranscribed genetic elements.
In another aspect, it is envisioned the method of the present invention can be used to generate novel polynucleotides encoding biochemical pathways from one or more operons or gene clusters or portions thereof. For example, bacteria and many eukaryotes have a coordinated mechanism for regulating genes whose products are involved in related processes. The genes are clustered, in structures referred to as “gene clusters,” on a single chromosome and are transcribed together under the control of a single regulatory sequence, including a single promoter which initiates transcription of the entire cluster. Thus, a gene cluster is a group of adjacent genes that are either identical or related, usually as to their function. An example of a biochemical pathway encoded by gene clusters are polyketides.
Gene cluster DNA can be isolated from different organisms and ligated into vectors, particularly vectors containing expression regulatory sequences which can control and regulate the production of a detectable protein or protein-related array activity from the ligated gene clusters. Use of vectors which have an exceptionally large capacity for exogenous DNA introduction are particularly appropriate for use with such gene clusters and are described by way of example herein to include the f-factor (or fertility factor) of E. coli. This f-factor of E. coli is a plasmid which affects high-frequency transfer of itself during conjugation and is ideal to achieve and stably propagate large DNA fragments, such as gene clusters from mixed microbial samples. One aspect of the invention is to use cloning vectors, referred to as “fosmids” or bacterial artificial chromosome (BAC) vectors. These are derived from E. coli f-factor which is able to stably integrate large segments of genomic DNA. When integrated with DNA from a mixed uncultured environmental sample, this makes it possible to achieve large genomic fragments in the form of a stable “environmental DNA library.” Another type of vector for use in the present invention is a cosmid vector. Cosmid vectors were originally designed to clone and propagate large segments of genomic DNA. Cloning into cosmid vectors is described in detail in Sambrook et al., Molecular Cloning: A Laboratory Manual, 2nd Ed., Cold Spring Harbor Laboratory Press (1989). Once ligated into an appropriate vector, two or more vectors containing different polyketide synthase gene clusters can be introduced into a suitable host cell. Regions of partial sequence homology shared by the gene clusters will promote processes which result in sequence reorganization resulting in a hybrid gene cluster. The novel hybrid gene cluster can then be screened for enhanced activities not found in the original gene clusters.
Therefore, in a one aspect, the invention relates to a method for producing a biologically active hybrid polypeptide and screening such a polypeptide for enhanced activity by:

    
    
        1) introducing at least a first polynucleotide in operable linkage and a second polynucleotide in operable linkage, the at least first polynucleotide and second polynucleotide sharing at least one region of partial sequence homology, into a suitable host cell;
        2) growing the host cell under conditions which promote sequence reorganization resulting in a hybrid polynucleotide in operable linkage;
        3) expressing a hybrid polypeptide encoded by the hybrid polynucleotide;
        4) screening the hybrid polypeptide under conditions which promote identification of enhanced biological activity; and
        5) isolating the a polynucleotide encoding the hybrid polypeptide.
    
    


Methods for screening for various enzyme activities are known to those of skill in the art and are discussed throughout the present specification. Such methods may be employed when isolating the polypeptides and polynucleotides of the invention.
Screening Methodologies and “On-line” Monitoring Devices
In practicing the methods of the invention, a variety of apparatus and methodologies can be used to in conjunction with the polypeptides and nucleic acids of the invention, e.g., to screen polypeptides for transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase activity, to screen compounds as potential modulators, e.g., activators or inhibitors, of a transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase activity, for antibodies that bind to a polypeptide of the invention, for nucleic acids that hybridize to a nucleic acid of the invention, to screen for cells expressing a polypeptide of the invention and the like. In addition to the array formats described in detail below for screening samples, alternative formats can also be used to practice the methods of the invention. Such formats include, for example, mass spectrometers, chromatographs, e.g., high-throughput HPLC and other forms of liquid chromatography, and smaller formats, such as 1536-well plates, 384-well plates and so on. High throughput screening apparatus can be adapted and used to practice the methods of the invention, see, e.g., U.S. Patent Application No. 20020001809.
Capillary Arrays
Nucleic acids or polypeptides of the invention can be immobilized to or applied to an array. Arrays can be used to screen for or monitor libraries of compositions (e.g., small molecules, antibodies, nucleic acids, etc.) for their ability to bind to or modulate the activity of a nucleic acid or a polypeptide of the invention. Capillary arrays, such as the GIGAMATRIXTM, Diversa Corporation, San Diego, Calif.; and arrays described in, e.g., U.S. Patent Application No. 20020080350 A1; WO 0231203 A; WO 0244336 A, provide an alternative apparatus for holding and screening samples. In one aspect, the capillary array includes a plurality of capillaries formed into an array of adjacent capillaries, wherein each capillary comprises at least one wall defining a lumen for retaining a sample. The lumen may be cylindrical, square, hexagonal or any other geometric shape so long as the walls form a lumen for retention of a liquid or sample. The capillaries of the capillary array can be held together in close proximity to form a planar structure. The capillaries can be bound together, by being fused (e.g., where the capillaries are made of glass), glued, bonded, or clamped side-by-side. Additionally, the capillary array can include interstitial material disposed between adjacent capillaries in the array, thereby forming a solid planar device containing a plurality of through-holes.
A capillary array can be formed of any number of individual capillaries, for example, a range from 100 to 4,000,000 capillaries. Further, a capillary array having about 100,000 or more individual capillaries can be formed into the standard size and shape of a Microtiter® plate for fitment into standard laboratory equipment. The lumens are filled manually or automatically using either capillary action or microinjection using a thin needle. Samples of interest may subsequently be removed from individual capillaries for further analysis or characterization. For example, a thin, needle-like probe is positioned in fluid communication with a selected capillary to either add or withdraw material from the lumen.
In a single-pot screening assay, the assay components are mixed yielding a solution of interest, prior to insertion into the capillary array. The lumen is filled by capillary action when at least a portion of the array is immersed into a solution of interest. Chemical or biological reactions and/or activity in each capillary are monitored for detectable events. A detectable event is often referred to as a “hit”, which can usually be distinguished from “non-hit” producing capillaries by optical detection. Thus, capillary arrays allow for massively parallel detection of “hits”.
In a multi-pot screening assay, a polypeptide or nucleic acid, e.g., a ligand, can be introduced into a first component, which is introduced into at least a portion of a capillary of a capillary array. An air bubble can then be introduced into the capillary behind the first component. A second component can then be introduced into the capillary, wherein the second component is separated from the first component by the air bubble. The first and second components can then be mixed by applying hydrostatic pressure to both sides of the capillary array to collapse the bubble. The capillary array is then monitored for a detectable event resulting from reaction or non-reaction of the two components.
In a binding screening assay, a sample of interest can be introduced as a first liquid labeled with a detectable particle into a capillary of a capillary array, wherein the lumen of the capillary is coated with a binding material for binding the detectable particle to the lumen. The first liquid may then be removed from the capillary tube, wherein the bound detectable particle is maintained within the capillary, and a second liquid may be introduced into the capillary tube. The capillary is then monitored for a detectable event resulting from reaction or non-reaction of the particle with the second liquid.
Arrays, or “Biochips”
Nucleic acids and/or polypeptides of the invention can be immobilized to or applied to an array, e.g., a “biochip”. Arrays can be used to screen for or monitor libraries of compositions (e.g., small molecules, antibodies, nucleic acids, etc.) for their ability to bind to or modulate the activity of a nucleic acid or a polypeptide of the invention. For example, in one aspect of the invention, a monitored parameter is transcript expression of a transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase gene. One or more, or, all the transcripts of a cell can be measured by hybridization of a sample comprising transcripts of the cell, or, nucleic acids representative of or complementary to transcripts of a cell, by hybridization to immobilized nucleic acids on an array, or “biochip.” By using an “array” of nucleic acids on a microchip, some or all of the transcripts of a cell can be simultaneously quantified. Alternatively, arrays comprising genomic nucleic acid can also be used to determine the genotype of a newly engineered strain made by the methods of the invention. Polypeptide arrays” can also be used to simultaneously quantify a plurality of proteins. The present invention can be practiced with any known “array,” also referred to as a “microarray” or “nucleic acid array” or “polypeptide array” or “antibody array” or “biochip,” or variation thereof. Arrays are generically a plurality of “spots” or “target elements,” each target element comprising a defined amount of one or more biological molecules, e.g., oligonucleotides, immobilized onto a defined area of a substrate surface for specific binding to a sample molecule, e.g., mRNA transcripts.
The terms “array” or “microarray” or “biochip” or “chip” as used herein is a plurality of target elements, each target element comprising a defined amount of one or more polypeptides (including antibodies) or nucleic acids immobilized onto a defined area of a substrate surface, as discussed in further detail, below.
In practicing the methods of the invention, any known array and/or method of making and using arrays can be incorporated in whole or in part, or variations thereof, as described, for example, in U.S. Pat. Nos. 6,277,628; 6,277,489; 6,261,776; 6,258,606; 6,054,270; 6,048,695; 6,045,996; 6,022,963; 6,013,440; 5,965,452; 5,959,098; 5,856,174; 5,830,645; 5,770,456; 5,632,957; 5,556,752; 5,143,854; 5,807,522; 5,800,992; 5,744,305; 5,700,637; 5,556,752; 5,434,049; see also, e.g., WO 99/51773; WO 99/09217; WO 97/46313; WO 96/17958; see also, e.g., Johnston (1998) Curr. Biol. 8:R171-R174; Schummer (1997) Biotechniques 23:1087-1092; Kern (1997) Biotechniques 23:120-124; Solinas-Toldo (1997) Genes, Chromosomes & Cancer 20:399-407; Bowtell (1999) Nature Genetics Supp. 21:25-32. See also published U.S. patent applications Nos. 20010018642; 20010019827; 20010016322; 20010014449; 20010014448; 20010012537; 20010008765.
Antibodies and Antibody-Based Screening Methods
The invention provides isolated, synthetic or recombinant antibodies that specifically bind to a transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase of the invention. These antibodies can be used to isolate, identify or quantify a transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase of the invention or related polypeptides. These antibodies can be used to isolate other polypeptides within the scope the invention or other related ansferases, e.g., transaminases, e.g., d-amino-acid transferases, and/or oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases. The antibodies can be designed to bind to an active site of a transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase. Thus, the invention provides methods of inhibiting transferases, e.g., transaminases, e.g., d-amino-acid transferases, and/or oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases using the antibodies of the invention (see discussion above regarding applications for anti-transferase, e.g., anti-transaminase, e.g., anti-d-amino-acid transferase, and/or anti-oxidoreductase, e.g., anti-dehydrogenase, e.g., anti-d-amino-acid dehydrogenasecompositions of the invention).
The invention provides fragments of the enzymes of the invention, including immunogenic fragments of a polypeptide of the invention. The invention provides compositions comprising a polypeptide or peptide of the invention and adjuvants or carriers and the like.
The antibodies can be used in immunoprecipitation, staining, immunoaffinity columns, and the like. If desired, nucleic acid sequences encoding for specific antigens can be generated by immunization followed by isolation of polypeptide or nucleic acid, amplification or cloning and immobilization of polypeptide onto an array of the invention. Alternatively, the methods of the invention can be used to modify the structure of an antibody produced by a cell to be modified, e.g., an antibody's affinity can be increased or decreased. Furthermore, the ability to make or modify antibodies can be a phenotype engineered into a cell by the methods of the invention.
The term “antibody” includes a peptide or polypeptide derived from, modeled after or substantially encoded by an immunoglobulin gene or immunoglobulin genes, or fragments thereof, capable of specifically binding an antigen or epitope, see, e.g. Fundamental Immunology, Third Edition, W. E. Paul, ed., Raven Press, N.Y. (1993); Wilson (1994) J. Immunol. Methods 175:267-273; Yarmush (1992) J. Biochem. Biophys. Methods 25:85-97. The term antibody includes antigen-binding portions, i.e., “antigen binding sites,” (e.g., fragments, subsequences, complementarity determining regions (CDRs)) that retain capacity to bind antigen, including (i) a Fab fragment, a monovalent fragment consisting of the VL, VH, CL and CH1 domains; (ii) a F(ab′)2 fragment, a bivalent fragment comprising two Fab fragments linked by a disulfide bridge at the hinge region; (iii) a Fd fragment consisting of the VH and CH1 domains; (iv) a Fv fragment consisting of the VL and VH domains of a single arm of an antibody, (v) a dAb fragment (Ward et al., (1989) Nature 341:544-546), which consists of a VH domain; and (vi) an isolated complementarity determining region (CDR). Single chain antibodies are also included by reference in the term “antibody.”
Methods of immunization, producing and isolating antibodies (polyclonal and monoclonal) are known to those of skill in the art and described in the scientific and patent literature, see, e.g., Coligan, CURRENT PROTOCOLS IN IMMUNOLOGY, Wiley/Greene, NY (1991); Stites (eds.) BASIC AND CLINICAL IMMUNOLOGY (7th ed.) Lange Medical Publications, Los Altos, Calif. (“Stites”); Goding, MONOCLONAL ANTIBODIES: PRINCIPLES AND PRACTICE (2d ed.) Academic Press, New York, N.Y. (1986); Kohler (1975) Nature 256:495; Harlow (1988) ANTIBODIES, A LABORATORY MANUAL, Cold Spring Harbor Publications, New York. Antibodies also can be generated in vitro, e.g., using recombinant antibody binding site expressing phage display libraries, in addition to the traditional in vivo methods using animals. See, e.g., Hoogenboom (1997) Trends Biotechnol. 15:62-70; Katz (1997) Annu. Rev. Biophys. Biomol. Struct. 26:27-45.
The polypeptides of The invention or fragments comprising at least 5, 10, 15, 20, 25, 30, 35, 40, 50, 75, 100, or 150 consecutive amino acids thereof, may also be used to generate antibodies which bind specifically to the polypeptides or fragments. The resulting antibodies may be used in immunoaffinity chromatography procedures to isolate or purify the polypeptide or to determine whether the polypeptide is present in a biological sample. In such procedures, a protein preparation, such as an extract, or a biological sample is contacted with an antibody capable of specifically binding to one of the polypeptides of The invention, or fragments comprising at least 5, 10, 15, 20, 25, 30, 35, 40, 50, 75, 100, or 150 consecutive amino acids thereof.
In immunoaffinity procedures, the antibody is attached to a solid support, such as a bead or other column matrix. The protein preparation is placed in contact with the antibody under conditions in which the antibody specifically binds to one of the polypeptides of The invention, or fragment thereof. After a wash to remove non-specifically bound proteins, the specifically bound polypeptides are eluted.
The ability of proteins in a biological sample to bind to the antibody may be determined using any of a variety of procedures familiar to those skilled in the art. For example, binding may be determined by labeling the antibody with a detectable label such as a fluorescent agent, an enzymatic label, or a radioisotope. Alternatively, binding of the antibody to the sample may be detected using a secondary antibody having such a detectable label thereon. Particular assays include ELISA assays, sandwich assays, radioimmunoassays and Western Blots.
Polyclonal antibodies generated against the polypeptides of The invention, or fragments comprising at least 5, 10, 15, 20, 25, 30, 35, 40, 50, 75, 100, or 150 or more consecutive amino acids thereof can be obtained by direct injection of the polypeptides into an animal or by administering the polypeptides to an animal, for example, a nonhuman. The antibody so obtained will then bind the polypeptide itself. In this manner, even a sequence encoding only a fragment of the polypeptide can be used to generate antibodies which may bind to the whole native polypeptide. Such antibodies can then be used to isolate the polypeptide from cells expressing that polypeptide.
For preparation of monoclonal antibodies, any technique which provides antibodies produced by continuous cell line cultures can be used. Examples include the hybridoma technique (Kohler and Milstein, Nature, 256:495-497, 1975), the trioma technique, the human B-cell hybridoma technique (Kozbor et al., Immunology Today 4:72, 1983) and the EBV-hybridoma technique (Cole, et al., 1985, in Monoclonal Antibodies and Cancer Therapy, Alan R. Liss, Inc., pp. 77-96).
Techniques described for the production of single chain antibodies (U.S. Pat. No. 4,946,778) can be adapted to produce single chain antibodies to the polypeptides of The invention, or fragments comprising at least 5, 10, 15, 20, 25, 30, 35, 40, 50, 75, 100, or 150 consecutive amino acids thereof. Alternatively, transgenic mice may be used to express humanized antibodies to these polypeptides or fragments thereof.
Antibodies generated against the polypeptides of The invention, or fragments comprising at least 5, 10, 15, 20, 25, 30, 35, 40, 50, 75, 100, or 150 consecutive amino acids thereof may be used in screening for similar polypeptides from other organisms and samples. In such techniques, polypeptides from the organism are contacted with the antibody and those polypeptides which specifically bind the antibody are detected. Any of the procedures described above may be used to detect antibody binding. One such screening assay is described in “Methods for Measuring Cellulase Activities”, Methods in Enzymology, Vol 160, pp. 87-116.
Kits
The invention provides kits comprising the compositions, e.g., nucleic acids, expression cassettes, vectors, cells, transgenic seeds or plants or plant parts, polypeptides (e.g., transferases, e.g., transaminases, e.g., d-amino-acid transferases, and/or oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases) and/or antibodies of the invention. The kits also can contain instructional material teaching the methodologies and industrial, research, medical, pharmaceutical, food and feed and food and feed supplement processing and other applications and processes of the invention, as described herein.
Whole Cell Engineering and Measuring Metabolic Parameters
The methods of the invention provide whole cell evolution, or whole cell engineering, of a cell to develop a new cell strain having a new phenotype, e.g., a new or modified transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase activity, by modifying the genetic composition of the cell. The genetic composition can be modified by addition to the cell of a nucleic acid of the invention, e.g., a coding sequence for an enzyme of the invention. See, e.g., WO0229032; WO0196551.
To detect the new phenotype, at least one metabolic parameter of a modified cell is monitored in the cell in a “real time” or “on-line” time frame. In one aspect, a plurality of cells, such as a cell culture, is monitored in “real time” or “on-line.” In one aspect, a plurality of metabolic parameters is monitored in “real time” or “on-line.” Metabolic parameters can be monitored using the transferases, e.g., transaminases, e.g., d-amino-acid transferases, and/or oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases of the invention.
Metabolic flux analysis (MFA) is based on a known biochemistry framework. A linearly independent metabolic matrix is constructed based on the law of mass conservation and on the pseudo-steady state hypothesis (PSSH) on the intracellular metabolites. In practicing the methods of the invention, metabolic networks are established, including the:

    
    
        identity of all pathway substrates, products and intermediary metabolites
        identity of all the chemical reactions interconverting the pathway metabolites, the stoichiometry of the pathway reactions,
        identity of all the enzymes catalyzing the reactions, the enzyme reaction kinetics,
        the regulatory interactions between pathway components, e.g. allosteric interactions, enzyme-enzyme interactions etc,
        intracellular compartmentalization of enzymes or any other supramolecular organization of the enzymes, and,
        the presence of any concentration gradients of metabolites, enzymes or effector molecules or diffusion barriers to their movement.
    
    


Once the metabolic network for a given strain is built, mathematic presentation by matrix notion can be introduced to estimate the intracellular metabolic fluxes if the on-line metabolome data is available. Metabolic phenotype relies on the changes of the whole metabolic network within a cell. Metabolic phenotype relies on the change of pathway utilization with respect to environmental conditions, genetic regulation, developmental state and the genotype, etc. In one aspect of the methods of the invention, after the on-line MFA calculation, the dynamic behavior of the cells, their phenotype and other properties are analyzed by investigating the pathway utilization. For example, if the glucose supply is increased and the oxygen decreased during the yeast fermentation, the utilization of respiratory pathways will be reduced and/or stopped, and the utilization of the fermentative pathways will dominate. Control of physiological state of cell cultures will become possible after the pathway analysis. The methods of the invention can help determine how to manipulate the fermentation by determining how to change the substrate supply, temperature, use of inducers, etc. to control the physiological state of cells to move along desirable direction. In practicing the methods of the invention, the MFA results can also be compared with transcriptome and proteome data to design experiments and protocols for metabolic engineering or gene shuffling, etc.
In practicing the methods of the invention, any modified or new phenotype can be conferred and detected, including new or improved characteristics in the cell. Any aspect of metabolism or growth can be monitored.
Monitoring Expression of an mRNA Transcript
In one aspect of the invention, the engineered phenotype comprises increasing or decreasing the expression of an mRNA transcript (e.g., a transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase message) or generating new (e.g., transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase) transcripts in a cell. This increased or decreased expression can be traced by testing for the presence of a transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase of the invention or by transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase activity assays. mRNA transcripts, or messages, also can be detected and quantified by any method known in the art, including, e.g., Northern blots, quantitative amplification reactions, hybridization to arrays, and the like. Quantitative amplification reactions include, e.g., quantitative PCR, including, e.g., quantitative reverse transcription polymerase chain reaction, or RT-PCR; quantitative real time RT-PCR, or “real-time kinetic RT-PCR” (see, e.g., Kreuzer (2001) Br. J. Haematol. 114:313-318; Xia (2001) Transplantation 72:907-914).
In one aspect of the invention, the engineered phenotype is generated by knocking out expression of a homologous gene. The gene's coding sequence or one or more transcriptional control elements can be knocked out, e.g., promoters or enhancers. Thus, the expression of a transcript can be completely ablated or only decreased.
In one aspect of the invention, the engineered phenotype comprises increasing the expression of a homologous gene. This can be effected by knocking out of a negative control element, including a transcriptional regulatory element acting in cis- or trans-, or, mutagenizing a positive control element. One or more, or, all the transcripts of a cell can be measured by hybridization of a sample comprising transcripts of the cell, or, nucleic acids representative of or complementary to transcripts of a cell, by hybridization to immobilized nucleic acids on an array.
Monitoring Expression of a Polypeptides, Peptides and Amino Acids
In one aspect of the invention, the engineered phenotype comprises increasing or decreasing the expression of a polypeptide (e.g., a transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase) or generating new polypeptides in a cell. This increased or decreased expression can be traced by determining the amount of transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase present or by transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase activity assays. Polypeptides, peptides and amino acids also can be detected and quantified by any method known in the art, including, e.g., nuclear magnetic resonance (NMR), spectrophotometry, radiography (protein radiolabeling), electrophoresis, capillary electrophoresis, high performance liquid chromatography (HPLC), thin layer chromatography (TLC), hyperdiffusion chromatography, various immunological methods, e g immunoprecipitation, immunodiffusion, immuno-electrophoresis, radioimmunoassays (RIAs), enzyme-linked immunosorbent assays (ELISAs), immuno-fluorescent assays, gel electrophoresis (e.g., SDS-PAGE), staining with antibodies, fluorescent activated cell sorter (FACS), pyrolysis mass spectrometry, Fourier-Transform Infrared Spectrometry, Raman spectrometry, GC-MS, and LC-Electrospray and cap-LC-tandem-electrospray mass spectrometries, and the like. Novel bioactivities can also be screened using methods, or variations thereof, described in U.S. Pat. No. 6,057,103. Furthermore, as discussed below in detail, one or more, or, all the polypeptides of a cell can be measured using a protein array.
Industrial, Energy, Pharmaceutical, Medical, Food Processing and Other Applications
Polypeptides of the invention can be used in any industrial, agricultural, food and feed and food and feed supplement processing, pharmaceutical (drug), medical, research (laboratory) or other process. The invention provides industrial processes using enzymes of the invention, e.g., in the pharmaceutical or nutrient (diet) supplement industry, the energy industry (e.g., to make “clean” biofuels), in the food and feed industries, e.g., in methods for making food and feed products and food and feed additives. In one aspect, the invention provides processes using enzymes of the invention in the medical industry, e.g., to make pharmaceuticals (drugs), pharmaceutical (drug) precusors or intermediates, or dietary aids or supplements, or food supplements and additives. In addition, the invention provides methods for using the enzymes of the invention in biofuel production, including, e.g., a bioalcohol such as bioethanol, biomethanol, biobutanol or biopropanol, thus comprising a “clean” fuel production.
The transferases of the invention, which can have any transaminase activity, e.g., d-amino-acid transferase or ω-transaminase activity, e.g., catalyzing the conversion of ω-amines to ketones. The transferases of the invention also can have oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase activity. An enzyme of the invention can be highly selective catalysts. They can catalyze reactions with exquisite stereo-, regio- and chemo-selectivities that are unparalleled in conventional synthetic chemistry. For example, an enzyme of the invention can have ω-transaminase activity that can comprise catalyzing the conversion of chiral ω-amines to ketones.
Enzymes of the invention can be remarkably versatile. For example, the transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase enzymes of the invention can be “tailored” (e.g., sequence modified, or otherwise modified, e.g., glycosylated) to function in organic solvents, operate at extreme pHs (for example, high pHs and low pHs) extreme temperatures (for example, high temperatures and low temperatures), extreme salinity levels (for example, high salinity and low salinity) and catalyze reactions with compounds that are structurally unrelated to their natural, physiological substrates.
In one aspect, the transaminase and/or aminotransferase enzymes of the invention are used in processes in organic synthesis reactions in the manufacture of medicaments, pesticides or intermediates thereof. In one embodiment, the transaminase and/or aminotransferase enzymes of the invention are used as targets for examining protein turnover in response to a pathological or biological process, e.g. liver damage/disease or myocardial infarction. In one exemplary transamination reaction using an enzyme of the invention, an alpha-amino group is transferred to an alpha-carbon atom of an alpha-ketoglutarate generating the corresponding alpha-keto acid analog of the amino acid.
Natural and Unnatural Amino Acid Synthesis
The enzymes of the invention can be used to produce all natural and various unnatural amino acid, including L- and/or D-amino acids, which can be used, e.g., in industrial or pharmaceutical (drug) products and/or pharmaceutical (drug) precursors and/or intermediates, such as sweeteners, antibiotics, peptide enzymes and peptide hormones. For example, alitame (e.g., ACLAMETM), tyrocidin A, antinomycin D, penicillin N and cephalosporin C, and cyclosporin A comprise D-alanine and D-phenylalanine, D-valine, D-alpha amino valerate, D-alpha aminoavalerate and D-alanine, respectively, are manufactured using an enzyme of the invention. In one aspect, an enzyme of the invention is used in the conversion of cephalosporin C to Glutaryl-7-aminocephalosporanic acid (GL-7ACA), which is a highly valuable pharmaceutical chemical for the synthesis of cephem antibiotics. In one exemplary method of producing Glutaryl-7-aminocephalosporanic acid from Cephalosporin C by using an aminotransferase of the invention, an enzyme of the invention is added to a substrate mixture comprising Cephalosporin C and a D-amino acceptor, e.g., a pyruvate or an alpha.-ketoglutarate, to form keto-GL-7ACA and D-Alanine or D-glutamate, respectively. The mixture is then reacted with hydrogen peroxide and the Glutaryl-7-amino-cephalosporanic acid is isolated as a product. See, e.g., U.S. Pat. No. 6,337,190.
The invention provides enzymes and processes for making natural and unnatural (non-natural) amino acids. Enzymes of this invention can be used with any natural or unnatural amino acid synthesis process known in the art; for example, in alternative embodiments, processes of the invention, using enzymes of this invention, synthesize natural or unnatural amino acids using methods as described in U.S. Pat. Nos. 6,197,558; 6,180,374; 4,518,692; and 4,826,766. For example, in one aspect the invention provides a method comprising reacting a first amino acid, a keto acid and a transaminase enzyme of this invention under conditions appropriate to produce a second amino acid and pyruvate; reacting the pyruvate with acetolactate synthase under conditions appropriate to produce a compound that does not react with the transaminase enzyme and separating the second amino acid.
In one aspect, enzymes and processes of the invention are used to make tert-leucine, which in turn can be used in drug/pharmaceutical synthetic processes, for example, L-tert-leucine-2-pyridylamide is a useful intermediate for the preparation of matrix metalloproteinase inhibitor compounds, see e.g., EP Patent EP0822186.
Enzymes and processes of the invention can be used to make “unnatural” amino acids such as:

    
    
        β-amino acids (β3 and β2)
        homo-amino acids
        cyclic amino acids
        aromatic amino acids
        N-metyl amino acids
        Pro and Pyr derivatives
        3-substituted Alanine derivatives
        Glycine derivatives
        Ring-substituted Phe and Tyr Derivatives
        Linear Core Amino Acids
        Diamino Acids (diamines)
        Ornithine
        Norleucine
        Phenylselenocysteine (see U.S. Pat. App. pub. 20070238152)
        Substituted amino acids (e.g., ortho-, para- or meta-substituted alanines, phenyl alanines, tyrosines, etc.)
        DAB (2,4-Diaminobutyric Acid)
    
    


Alicyclic Amino Acids (e.g., (cis)-3-Aminobicyclo[2.2.1]heptane-2-carboxylic acid; 1-Amino-1-cyclobutanecarboxylic acid; 1-Aminocyclohexanecarboxylic acid purum; cis-2-Amino-1-cyclopentanecarboxylic acid, and the like) Enzymes and processes of the invention can be used in conjunction with methods for in vivo incorporation of unnatural amino acids, e.g., as described in U.S. Pat. App. pubs. 20070117184; 20060234339; 20060233744; 20050272121; 20050250183; 20030082575.
Detergent, Disinfectant and Cleaning Compositions
The invention provides cleaning compositions, e.g., detergent, disinfectant or cleanser (cleaning or cleansing) compositions, e.g. for cleaning fabrics, dishwashing, laundry, oral cleaning, denture cleaning, and contact lenses, comprising one or more polypeptides (e.g., transferases, e.g., transaminases, e.g., d-amino-acid transferases, and/or oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases) of the invention, and methods of making and using these compositions. The invention incorporates all methods of making and using detergent, disinfectant or cleanser compositions, see, e.g., U.S. Pat. Nos. 6,413,928; 6,399,561; 6,365,561; 6,380,147. The detergent, disinfectant or cleanser compositions can be a one and two part aqueous composition, a non-aqueous liquid composition, a cast solid, a granular form, a particulate form, a compressed tablet, a gel and/or a paste and a slurry form. The transferases, e.g., transaminases, e.g., d-amino-acid transferases, and/or oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases of the invention can also be used as a detergent, disinfectant or cleanser additive product in a solid or a liquid form. Such additive products are intended to supplement or boost the performance of conventional detergent compositions and can be added at any stage of the cleaning process.
The actual active enzyme content depends upon the method of manufacture of a detergent, disinfectant or cleanser composition and is not critical, assuming the detergent solution has the desired enzymatic activity. In one aspect, the amount of transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase present in the final solution ranges from about 0.001 mg to 0.5 mg per gram of the detergent composition. The particular enzyme chosen for use in the process and products of this invention depends upon the conditions of final utility, including the physical product form, use pH, use temperature, and soil types to be degraded or altered. The enzyme can be chosen to provide optimum activity and stability for any given set of utility conditions. In one aspect, the transferases, e.g., transaminases, e.g., d-amino-acid transferases, and/or oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases of the present invention are active in the pH ranges of from about 4 to about 12 and in the temperature range of from about 20° C. to about 95° C. The detergents of the invention can comprise cationic, semi-polar nonionic or zwitterionic surfactants; or, mixtures thereof.
Transferases, e.g., transaminases, e.g., d-amino-acid transferases, and/or oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases of the invention can be formulated into powdered and liquid detergents, disinfectants or cleansers having pH between 4.0 and 12.0 at levels of about 0.01 to about 5% (preferably 0.1% to 0.5%) by weight. These detergent, disinfectant or cleanser compositions can also include other transferases, e.g., transaminases, e.g., d-amino-acid transferases, and/or oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases and/or other enzymes such as xylanases, cellulases, lipases, esterases, proteases, or endoglycosidases, endo-beta.-1,4-glucanases, beta-glucanases, endo-beta-1,3(4)-glucanases, cutinases, peroxidases, catalases, laccases, amylases, glucoamylases, pectinases, oxidoreductases, reductases, oxidases, epimerases, isomerases, racemases, phenoloxidases, ligninases, pullulanases, arabinanases, hemicellulases, mannanases, xyloglucanases, pectin acetyl esterases, rhamnogalacturonan acetyl esterases, polygalacturonases, rhamnogalacturonases, galactanases, pectin lyases, pectin methylesterases, cellobiohydrolases and/or transglutaminases. These detergent, disinfectant or cleanser compositions can also include dyes, colorants, odorants, bleaches, buffers, builders, enzyme “enhancing agents” (see, e.g., U.S. Patent application no. 20030096394) and stabilizers.
In one aspect, the invention provides a method for cleaning or washing an object comprising contacting the object with a polypeptide of the invention under conditions sufficient for cleaning or washing. A transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase of the invention may be included as a detergent, disinfectant or cleanser additive. A fabric softener composition can comprise a transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase of the invention.
Treating Foods and Food Processing
The transferases, e.g., transaminases, e.g., d-amino-acid transferases, and/or oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases of the invention have numerous applications in food processing industry. For example, in one aspect, the transferases, e.g., transaminases, e.g., d-amino-acid transferases, and/or oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases of the invention are used to improve the extraction of oil from oil-rich plant material, e.g., oil-rich seeds, for example, soybean oil from soybeans, olive oil from olives, rapeseed oil from rapeseed and/or sunflower oil from sunflower seeds. In another aspect, the transferases, e.g., transaminases, e.g., d-amino-acid transferases, and/or oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases of the invention can be used for separation of components of plant cell materials.
The transferases, e.g., transaminases, e.g., d-amino-acid transferases, and/or oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases of the invention can be used in the preparation of fruit or vegetable juices, syrups, extracts and the like to increase yield. The transferases, e.g., transaminases, e.g., d-amino-acid transferases, and/or oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases of the invention can be used in the enzymatic treatment of various plant cell wall-derived materials or waste materials, e.g. from cereals, grains, wine or juice production, or agricultural residues such as vegetable hulls, bean hulls, sugar beet pulp, olive pulp, potato pulp, and the like. The transferases, e.g., transaminases, e.g., d-amino-acid transferases, and/or oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases of the invention can be used to modify the consistency and appearance of processed fruit or vegetables. The transferases, e.g., transaminases, e.g., d-amino-acid transferases, and/or oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases of the invention can be used to treat plant material to facilitate processing of plant material, including foods, facilitate purification or extraction of plant components.
In one aspect, transferases, e.g., transaminases, e.g., d-amino-acid transferases, and/or oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases of the invention are used in baking applications, e.g., cookies, breads and crackers. In one aspect, transferases, e.g., transaminases, e.g., d-amino-acid transferases, and/or oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases of the invention are used as additives in dough processing. In another aspect of the invention, the transferases, e.g., transaminases, e.g., d-amino-acid transferases, and/or oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases of the invention can also be used in any food or beverage treatment or food or beverage production process. In another aspect of the invention, the transferases, e.g., transaminases, e.g., d-amino-acid transferases, and/or oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases of the invention can be included in any food or beverage composition.
Feeds and Food or Feed or Food Additives
The invention provides methods for treating feeds, foods, food or feed additives, food or feed supplements, or dietary aids, using transferases, e.g., transaminases, e.g., d-amino-acid transferases, and/or oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases of the invention, animals including mammals (e.g., humans), birds, fish and the like. The invention provides feeds, foods, food or feed additives, food or feed supplements, or dietary aids comprising transferases, e.g., transaminases, e.g., d-amino-acid transferases, and/or oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases of the invention. In one aspect, treating feeds, foods, food or feed additives, food or feed supplements, or dietary aids using transferases, e.g., transaminases, e.g., d-amino-acid transferases, and/or oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases of the invention can help in the availability of nutrients, e.g., starch, protein, sugars, and the like, in the feeds, foods, food or feed additives, food or feed supplements, or dietary aids.
The feeds, foods, food or feed additives, food or feed supplements, or dietary aids of the invention may be a granulated, pelletized or particulate form, which may be coated or uncoated. Alternatively, the feeds, foods, food or feed additives, food or feed supplements, or dietary aids of the invention may be a stabilized liquid composition. This may be an aqueous or oil-based slurry. See, e.g., U.S. Pat. No. 6,245,546.
In another aspect, transferases, e.g., transaminases, e.g., d-amino-acid transferases, and/or oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases of the invention can be supplied by expressing the enzymes directly in transgenic feed crops (as, e.g., transgenic plants, seeds and the like), such as grains, cereals, corn, soy bean, rape seed, lupin and the like. As discussed above, the invention provides transgenic plants, plant parts and plant cells comprising a nucleic acid sequence encoding a polypeptide of the invention. In one aspect, the nucleic acid is expressed such that the transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase of the invention is produced in recoverable quantities. The transferases, e.g., transaminases, e.g., d-amino-acid transferases, and/or oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases can be recovered from any plant or plant part. Alternatively, the plant or plant part containing the recombinant polypeptide can be used as such for improving the quality of a food or feed, e.g., improving nutritional value, palatability, and rheological properties, or to destroy an antinutritive factor.
A coating can be applied to the invention enzyme granules, pellets, particles for many different purposes, such as to add a flavor or nutrition supplement, to delay release nutrients and enzymes in gastric conditions, and the like. Or, the coating may be applied to achieve a functional goal, for example, whenever it is desirable to slow release of the enzyme from the matrix particles or to control the conditions under which the enzyme will be released. The composition of the coating material can be such that it is selectively broken down by an agent to which it is susceptible (such as heat, acid or base, enzymes or other chemicals). Alternatively, two or more coatings susceptible to different such breakdown agents may be consecutively applied to the matrix particles.
The invention is also directed towards a process for preparing an enzyme-releasing matrix. In accordance with the invention, the process comprises providing discrete plural particles of a grain-based substrate in a particle size suitable for use as an enzyme-releasing matrix, wherein the particles comprise a transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase enzyme encoded by an amino acid sequence of the invention or at least 30 consecutive amino acids thereof. Preferably, the process includes compacting or compressing the particles of enzyme-releasing matrix into granules, which can be accomplished by pelletizing. The mold inhibitor and cohesiveness agent, when used, can be added at any suitable time, and can be mixed with the grain-based substrate in the desired proportions prior to pelletizing of the grain-based substrate. Moisture content in the pellet mill feed can be in the ranges set forth above with respect to the moisture content in the finished product, and can be about 14-15%. In one aspect, moisture is added to the feedstock in the form of an aqueous preparation of the enzyme to bring the feedstock to this moisture content. The temperature in the pellet mill can be brought to about 82° C. with steam. The pellet mill may be operated under any conditions that impart sufficient work to the feedstock to provide pellets. The pelleting process itself is a cost-effective process for removing water from the enzyme-containing composition.
In one aspect, the pellet mill is operated with a 1⁄8 in. by 2 inch die at 100 lb./min pressure at 82° C. to provide pellets, which then are crumbled in a pellet mill crumbler to provide discrete plural particles having a particle size capable of passing through an 8 mesh screen but being retained on a 20 mesh screen.
The thermostable transferases, e.g., transaminases, e.g., d-amino-acid transferases, and/or oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases of the invention can be used in the pellets of the invention. They can have high optimum temperatures and high heat resistance such that an enzyme reaction at a temperature not hitherto carried out can be achieved. The gene encoding the transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase according to the present invention (e.g. as set forth in any of the sequences in the invention) can be used in preparation of transferases, e.g., transaminases, e.g., d-amino-acid transferases, and/or oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases (e.g. using GSSM as described herein) having characteristics different from those of the transferases, e.g., transaminases, e.g., d-amino-acid transferases, and/or oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases of the invention (in terms of optimum pH, optimum temperature, heat resistance, stability to solvents, specific activity, affinity to substrate, secretion ability, translation rate, transcription control and the like).
Waste Treatment
The transferases, e.g., transaminases, e.g., d-amino-acid transferases, and/or oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases of the invention can be used in a variety of other industrial applications, e.g., in waste treatment. For example, in one aspect, the invention provides a solid waste digestion process using transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase of the invention. The methods can comprise reducing the mass and volume of substantially untreated solid waste. Solid waste can be treated with an enzymatic digestive process in the presence of an enzymatic solution (including transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase of the invention) at a controlled temperature. This results in a reaction without appreciable bacterial fermentation from added microorganisms. The solid waste is converted into a liquefied waste and any residual solid waste. The resulting liquefied waste can be separated from said any residual solidified waste. See e.g., U.S. Pat. No. 5,709,796.
In another aspect of the invention, the transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase of the invention can also be used in any waste treatment process. In another aspect of the invention, the transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase of the invention can be included in any waste treatment composition.
Oral Care Products
The invention provides oral care products comprising transf transferases, e.g., transaminases, e.g., d-amino-acid transferases, and/or oxidoreductases, e.g., dehydrogenases, e.g., d-amino-acid dehydrogenases of the invention, including the enzyme mixtures or “cocktails” of the invention. Exemplary oral care products include toothpastes, dental creams, gels or tooth powders, odontics, mouth washes, pre- or post brushing rinse formulations, chewing gums, lozenges, or candy. See, e.g., U.S. Pat. No. 6,264,925.
Biomass Conversion and Biofuel Production
The invention provides methods and processes for biomass conversion or any organic material to a fuel, e.g., to a fuel, e.g. a biofuel, such as bioethanol, biomethanol, biopropanol and/or biobutanol and the like, using enzymes of the invention, including the enzyme mixtures or “cocktails” of the invention. Thus, the invention provides fuels, e.g., biofuels, such as bioethanols, comprising a polypeptide of the invention, including the enzyme mixtures or “cocktails” of the invention, or a polypeptide encoded by a nucleic acid of the invention. In alternative aspects, the fuel is derived from a plant material, which optionally comprises potatoes, soybean (rapeseed), barley, rye, corn, oats, wheat, beets or sugar cane, and optionally the fuel comprises a bioethanol or a gasoline-ethanol mix.
The invention provides methods for making a fuel comprising contacting a biomass composition or any organic material with a polypeptide of the invention, or a polypeptide encoded by a nucleic acid of the invention, or any one of the mixtures or “cocktails” or products of manufacture of the invention. In alternative embodiments, the biomass composition comprises a plant, plant product or plant derivative, and the plant or plant product can comprise cane sugar plants or plant products, beets or sugarbeets, wheat, corn, soybeans, potato, rice or barley. In one aspect, the fuel comprises a bioethanol or a gasoline-ethanol mix, or a biopropanol or a gasoline-propanol mix, or a biobutanol or a gasoline-butanol mix, or a biomethanol or a gasoline-methanol mix, or a biodiesel or a gasoline-biodiesel mix, or any combination thereof.
The invention provides methods for making bioethanol, biobutanol, biomethanol and/or a biopropanol comprising contacting a biomass composition or any organic material with a polypeptide of the invention, or a polypeptide encoded by a nucleic acid of the invention, or any one of the mixtures or “cocktails” or products of manufacture of the invention. In alternative embodiments, the biomass composition comprises a plant, plant product or plant derivative, and the plant or plant product can comprise cane sugar plants or plant products, beets or sugarbeets, wheat, corn, soybeans, potato, rice or barley. In alternative embodiments, the organic material or biomass is derived from an agricultural crop (e.g., wheat, barley, potatoes, switchgrass, poplar wood), is a byproduct of a food or a feed production, is a lignocellulosic waste product, or is a plant residue or a waste paper or waste paper product, and optionally the plant residue comprise stems, leaves, hulls, husks, corn or corn cobs, corn stover, corn fiber, hay, straw (e.g. rice straw or wheat straw), sugarcane bagasse, sugar beet pulp, citrus pulp, and citrus peels, wood, wood thinnings, wood chips, wood pulp, pulp waste, wood waste, wood shavings and sawdust, construction and/or demolition wastes and debris (e.g. wood, wood shavings and sawdust), and optionally the paper waste comprises discarded or used photocopy paper, computer printer paper, notebook paper, notepad paper, typewriter paper, newspapers, magazines, cardboard and paper-based packaging materials, and recycled paper materials. In addition, urban wastes, e.g. the paper fraction of municipal solid waste, municipal wood waste, and municipal green waste can be used.
The invention provides compositions (including products of manufacture, enzyme ensembles, or “cocktails”) comprising a mixture (or “cocktail”) of transferase, e.g., transaminase, e.g., d-amino-acid transferase, and/or oxidoreductase, e.g., dehydrogenase, e.g., d-amino-acid dehydrogenase enzymes.
The invention provides cells and/or organisms expressing enzymes of the invention (e.g., wherein the cells or organisms comprise as heterologous nucleic acids a sequence of this invention) for participation in chemical cycles involving natural biomass (e.g., plant) conversion. Alternatively, the polypeptide of the invention may be expressed in the biomass plant material or feedstock itself.
The methods of the invention also include taking the converted biomass (e.g., lignocellulosic) material (processed by enzymes of the invention) and making it into a fuel (e.g. a biofuel such as a bioethanol, biobutanol, biomethanol, a biopropanol, or a biodiesel) by fermentation and/or by chemical synthesis. In one aspect, the produced sugars are fermented and/or the non-fermentable products are gasified.
The methods of the invention also include converting algae, virgin vegetable oils, waste vegetable oils, animal fats and greases (e.g. tallow, lard, and yellow grease), or sewage, using enzymes of the invention, and making it into a fuel (e.g. a bioalcohol, e.g., a bioethanol, biomethanol, biobutanol or biopropanol, or biodiesel) by fermentation and/or by chemical synthesis or conversion.
The enzymes of the invention (including, for example, organisms, such as microorganisms, e.g., fungi, yeast or bacteria, and plants and plant cells and plant parts, e.g., seeds, making and in some aspects secreting recombinant enzymes of the invention) can be used in or included/integrated at any stage of any organic matter/biomass conversion process, e.g., at any one step, several steps, or included in all of the steps, or all of the following methods of biomass conversion processes, or all of these biofuel alternatives:
Direct combustion: the burning of material by direct heat and is the simplest biomass technology; can be very economical if a biomass source is nearby.

    
    
        1 Pyrolysis: is the thermal degradation of biomass by heat in the absence of oxygen. In one aspect, biomass is heated to a temperature between about 800 and 1400 degrees Fahrenheit, but no oxygen is introduced to support combustion resulting in the creation of gas, fuel oil and charcoal.
        2 Gasification: biomass can be used to produce methane through heating or anaerobic digestion. Syngas, a mixture of carbon monoxide and hydrogen, can be derived from biomass.
    
    


Landfill Gas: is generated by the decay (anaerobic digestion) of buried garbage in landfills. When the organic waste decomposes, it generates gas consisting of approximately 50% methane, the major component of natural gas.
Anaerobic digestion: converts organic matter to a mixture of methane, the major component of natural gas, and carbon dioxide. In one aspect, biomass such as waterwaste (sewage), manure, or food processing waste, is mixed with water and fed into a digester tank without air.
Fermentation

    
    
        Alcohol Fermentation: fuel alcohol is produced by converting cellulosic mass and/or starch to sugar, fermenting the sugar to alcohol, then separating the alcohol water mixture by distillation. Feedstocks such as dedicated crops (e.g., wheat, barley, potatoes, switchgrass, poplar wood), agricultural residues and wastes (e.g. rice straw, corn stover, wheat straw, sugarcane bagasse, rice hulls, corn fiber, sugar beet pulp, citrus pulp, and citrus peels), forestry wastes (e.g. hardwood and softwood thinnings, hardwood and softwood residues from timber operations, wood shavings, and sawdust), urban wastes (e.g. paper fraction of municipal solid waste, municipal wood waste, municipal green waste), wood wastes (e.g. saw mill waste, pulp mill waste, construction waste, demolition waste, wood shavings, and sawdust), and waste paper or other materials containing sugar, starch, and/or cellulose can be converted to sugars and then to alcohol by fermentation with yeast. Alternatively, materials containing sugars can be converted directly to alcohol by fermentation.
    
    


Transesterification: An exemplary reaction for converting oil to biodiesel is called transesterification. The transesterification process reacts an alcohol (like methanol) with the triglyceride oils contained in vegetable oils, animal fats, or recycled greases, forming fatty acid alkyl esters (biodiesel) and glycerin. The reaction requires heat and a strong base catalyst, such as sodium hydroxide or potassium hydroxide.
Biodiesel: Biodiesel is a mixture of fatty acid alkyl esters made from vegetable oils, animal fats or recycled greases. Biodiesel can be used as a fuel for vehicles in its pure form, but it is usually used as a petroleum diesel additive to reduce levels of particulates, carbon monoxide, hydrocarbons and air toxics from diesel-powered vehicles.
Hydrolysis: includes hydrolysis of a compound, e.g., a biomass, such as a lignocellulosic material, catalyzed using an enzyme of the instant invention.
Cogeneration: is the simultaneous production of more than one form of energy using a single fuel and facility. In one aspect, biomass cogeneration has more potential growth than biomass generation alone because cogeneration produces both heat and electricity.
Enzymes of the invention can also be used in glycerin refining. The glycerin by-product contains unreacted catalyst and soaps that are neutralized with an acid. Water and alcohol are removed to produce 50% to 80% crude glycerin. The remaining contaminants include unreacted fats and oils, which can be processes using the polypeptides of the invention. In a large biodiesel plants of the invention, the glycerin can be further purified, e.g., to 99% or higher purity, for the pharmaceutical and cosmetic industries.
Biofuels as a Liquid or a Gas Gasoline
The invention provides biofuels and synthetic fuels in the form of a gas, or gasoline, e.g., a syngas. In one aspect, methods of the invention comprising use of enzymes of the invention for chemical cycles for natural biomass conversion, e.g., for the hydrolysis of a biomass to make a biofuel, e.g., a bioethanol, biopropanol, bio-butanol or a biomethanol, or a synthetic fuel, in the form of a liquid or as a gas, such as a “syngas”.
For example, invention provides methods for making biofuel gases and synthetic gas fuels (“syngas”) comprising a bioethanol, biopropanol, bio-butanol and/or a biomethanol made using a polypeptide of the invention, or made using a method of the invention; and in one aspect this biofuel gas of the invention is mixed with a natural gas (can also be produced from biomass), e.g., a hydrogen or a hydrocarbon-based gas fuel. In one aspect, the invention provides methods for processing biomass to a synthetic fuel, e.g., a syngas, such as a syngas produced from a biomass by gasification. In one aspect, the invention provides methods for making an ethanol, propanol, butanol and/or methanol gas from a sugar cane, e.g., a bagasse. In one aspect, this fuel, or gas, is used as motor fuel, e.g., an automotive, truck, airplane, boat, small engine, etc. fuel. In one aspect, the invention provides methods for making an ethanol, propanol, butanol and/or methanol from a plant, e.g., corn, or a plant product, e.g., hay or straw (e.g., a rice straw or a wheat straw, or any the dry stalk of any cereal plant), or an agricultural waste product.
In one aspect, the ethanol, propanol, butanol and/or methanol made using a method of composition of the invention can be used as a fuel (e.g., a gasoline) additive (e.g., an oxygenator) or in a direct use as a fuel. For example, a ethanol, propanol, butanol and/or methanol, including a fuel, made by a method of the invention can be mixed with ethyl tertiary butyl ether (ETBE), or an ETBE mixture such as ETBE containing 47% ethanol as a biofuel, or with MTBE (methyl tertiary-butyl ether). In another aspect, a ethanol, propanol, butanol and/or methanol, including a fuel, made by a method of the invention can be mixed with:














IUPAC name
Common name









but-1-ene
α-butylene



cis-but-2-ene
cis-β-butylene



trans-but-2-ene
trans-β-butylene



2-methylpropene
isobutylene










A butanol and/or ethanol made by a method of the invention (e.g., using an enzyme of the invention) can be further processed using “A.B.E.” (Acetone, Butanol, Ethanol) fermentation; in one aspect, butanol being the only liquid product. In one aspect, this butanol and/or ethanol is burned “straight” in existing gasoline engines (without modification to the engine or car), produces more energy and is less corrosive and less water soluble than ethanol, and can be distributed via existing infrastructures.
In one aspect, one, several or all of these alcohols are made by a process of the invention using an enzyme of the invention, and the process can further comprise a biomass-to-liquid technology, e.g., a gasification process to produce syngas followed by catalytic synthesis, or by a bioconversion of biomass to a mixed alcohol fuel.
The invention also provides processes comprising use of an enzyme of the invention incorporating (or, incorporated into) “gas to liquid”, or GTL; or “coal to liquid”, or CTL; or “biomass to liquid” or BTL; or “oilsands to liquid”, or OTL, processes; and in one aspect these processes of the invention are used to make synthetic fuels. In one aspect, one of these processes of the invention comprises making a biofuel (e.g., a synfuel) out of a biomass using, e.g., the so-called “Fischer Tropsch” process (a catalyzed chemical reaction in which carbon monoxide and hydrogen are converted into liquid hydrocarbons of various forms; typical catalysts used are based on iron and cobalt; the principal purpose of this process is to produce a synthetic petroleum substitute for use as synthetic lubrication oil or as synthetic fuel). In one aspect, this synthetic biofuel of the invention can contain oxygen and can be used as additive in high quality diesel and petrol.
In alternative aspects, the processes of the invention use various pretreatments, which can be grouped into three categories: physical, chemical, and multiple (physical+chemical). Any chemicals can be used as a pretreatment agent, e.g., acids, alkalis, gases, cellulose solvents, alcohols, oxidizing agents and reducing agents. Among these chemicals, alkali is the most popular pretreatment agent because it is relatively inexpensive and results in less cellulose degradation. The common alkalis sodium hydroxide and lime also can be used as pretreatment agents. Although sodium hydroxide increases biomass digestibility significantly, it is difficult to recycle, is relatively expensive, and is dangerous to handle. In contrast, lime has many advantages: it is safe and very inexpensive, and can be recovered by carbonating wash water with carbon dioxide.
In one aspect, the invention provides a biofuel, e.g., a biogas, produced by the process of anaerobic digestion of organic material by anaerobes, wherein the process comprises use of an enzyme of the invention or a method of the invention. This biofuel, e.g., a biogas, can be produced either from biodegradable waste materials or by the use of energy crops fed into anaerobic digesters to supplement gas yields. The solid output, digestate, can also be used as a biofuel.
The invention provides methods for making biologically produced oils, including crude oils, and gases that can be used in diesel engines, wherein the process comprises use of an enzyme of the invention or a method of the invention. In one aspect, these methods can refine petroleum, e.g., crude oils, into kerosene, pertroleum, diesel and other fractions.
The invention provides methods (using an enzyme of the invention or a method of the invention) for making biologically produced oils from:

    
    
        Straight vegetable oil (SVO).
        Waste vegetable oil (WVO)—waste cooking oils and greases produced in quantity mostly by commercial kitchens.
        Biodiesel obtained from transesterification of animal fats and vegetable oil, directly usable in petroleum diesel engines.
        Biologically derived crude oil, together with biogas and carbon solids via the thermal depolymerization of complex organic materials including non oil based materials; for example, waste products such as old tires, offal, wood and plastic.
        Pyrolysis oil; which may be produced out of biomass, wood waste etc. using heat only in the flash pyrolysis process (the oil may have to be treated before using in conventional fuel systems or internal combustion engines).
        Wood, charcoal, and dried dung.
    
    


The invention will be further described with reference to the following examples; however, it is to be understood that the invention is not limited to such examples.
EXAMPLES
The aminotransferases and oxidoreductases described herein were obtained using a selection strategy. In this selection strategy, environmental DNA libraries were constructed in a bacterial host strain that exhibits L-tryptophan auxotrophy. Library clones were innoculated onto media containing D-tryptophan (but lacking L-tryptophan). The only clones that could grow are those that expressed a gene on one of the discrete environmental DNA fragments that encoded an enzyme active on D-tryptophan. For example, clones were identified that expressed an active tryptophan racemase and were able to convert D-tryptophan to L-tryptophan. Additionally, clones were identified that expressed an oxidoreductase (such as an amino acid oxidase or a dehydrogenase) that could convert D-tryptophan to an intermediate that the host cell could, in turn, convert to L-tryptophan. In the case of oxidoreductases such as aminoacid oxidases and dehydrogenases, one such intermediate is indole-3-pyruvate.
The Examples in Part A describe the methodologies used for initial characterization of the candidate DAT and oxidoreductase nucleic acids and the encoded polypeptides. Further characterization of particular nucleic acids and polypeptides is described in Part B.
Part A
Example 1
Growth and Assay Procedures #1
Enzyme Preparation
Glycerol stocks were used to inoculate flasks containing 50 mL of LB medium with the appropriate antibiotic. The starter cultures were grown overnight at 37° C. with shaking at 230 rpm and the OD600nm was checked. The starter culture was used to inoculate 400 mL to OD600nm of 0.05. The culture was incubated at 37° C. with shaking at 230 rpm.
Cultures were induced with 1 mM IPTG when the OD600nm was between 0.5 and 0.8 and incubated at 30° C. and 230 rpm overnight. Cultures were harvested by pelleting cells by centrifugation at 4000 rpm for 15 minutes. The supernatant was poured off and the pellet was either frozen for later use or resuspended in 20 mL of 50 mM sodium phosphate buffer (pH 7.5) supplemented with 26 U/mL of DNAse and lysed using a microfluidizer (Microfluidics Corporation, Newton, Mass.) per the manufacturer's instructions. The clarified lysate was collected and centrifuged at 11,000 rpm for 30 minutes. The supernatant was collected in a clean tube and filtered through a 0.2 μm filter. Five mL aliquots of the clarified lysate were placed in a vial and freeze-dried using a lyophilizer (Virtis Company, Gardinier, N.Y.) per the manufacturer's instructions. Approximately 1 mL of the clarified lysate was retained for protein quantitation using the Bio-Rad Protein Assay Reagent (Bio-Rad, Hercules, Calif.) and SDS-PAGE analysis. Then, the amount of protein in each lyophilized sample was calculated.
Activity Assay
Enzymes for activity assays were prepared in 50 mM sodium phosphate pH 7.5. DAT assays were usually performed using approximately 1 mg/mL total protein.
DAT Assay Using RR-Monatin Substrate
Twenty-five mM RR-monatin, 25 mM pyruvic acid sodium salt, 0.08 mM PLP, 90 mM sodium phosphate pH 8.0 and 0.8 mg/mL DAT (total protein) prepared as described above (under ‘Enzyme Preparation’ section) were combined and incubated at 30° C. at 300 rpm. At various timepoints (generally 0, 2, 4, and 24 hours), 50 μL of the reaction product was transferred to 150 μL of ice cold acetonitrile, and the sample vortexed for 30 seconds. Samples were centrifuged at 13,200 rpm for 10 minutes at 4° C., and the supernatant was passed through a 0.45 μm filter. The filtrate was diluted 10-fold in methanol, and samples were analyzed by Liquid Chromatography/Mass Spectrometry/Mass Spectrometry (LC-MS/MS) to monitor the D-alanine formed (described in this Example below under ‘IC/MS/MS method for detecting D-alanine or R,R-monatin’ section).
DAT Assay Using Tryptophan Substrate
Ten mM D-tryptophan, 25 mM pyruvic acid sodium salt, 0.08 mM PLP, 90 mM sodium phosphate pH 8.0, and 0.8 mg/mL DAT (total protein) prepared as described above (under ‘Enzyme Preparation’ section) were combined and incubated at 30° C. and 300 rpm. At timepoints (generally 0, 2, 4, and 24 hours), 50 μL of the reaction product was transferred to 150 μL of ice cold acetonitrile, vortexed for 30 seconds, and centrifuged at 13,200 rpm for 10 minutes at 4° C. The supernatant was passed through a 0.45 μm filter and the filtrate was diluted 10-fold in methanol. Samples were analyzed by LC/MS/MS to monitor the D-alanine formed (described in this Example below under ‘IC/MS/MS method for detecting D-alanine or R,R-monatin’ section).
LC/MS/MS Method for Detecting D-Alanine or R,R-Monatin
Liquid Chromatography/Mass Spectrometry/Mass Spectrometry (LC-MS/MS) screening was achieved by injecting samples from 96-well plates using a CTCPal auto-sampler (LEAP Technologies, Carrboro, N.C.) into a 30/70 H2O/Acn (0.1% formic acid) mixture provided by LC-10ADvp pumps (Shimadzu, Kyoto, Japan) at 1.0 mL/min through a Zorbax ECLIPSE XDB-C8TM (2.1×50 mm) column and into the API4000 TURBOION-SPRAYTM triple-quad mass spectrometer (Applied Biosystems, Foster City, Calif.).
Ion spray and Multiple Reaction Monitoring (MRM) were performed for the analytes of interest in the positive ion mode. alanine: parent/daughter ions: 90.12/44.25 monatin: parent/daughter ions: 293.11/130.15.
Example 2
Activity of DATs Using Assay Procedures #1
The vector pSE420-cHis is a derivative of pSE420 (Invitrogen, Carlsbad, Calif.). For pSE420-cHis, the vector was cut with NcoI and Hind III, and ligated with C-His. C-His: 5′-CCA TGG GAG GAT CCA GAT CTC ATC ACC ATC ACC ATC ACT AAG CTT (SEQ ID NO:977). The expression of the His-tag in this vector depends on the choice of host and stop codon. That is, if a TAG stop codon and a supE host are used, the His-tag is expressed; if a TAG stop codon and a non supE host are used, the His-tag is not expressed. Unless indicated otherwise, the His-tag was not expressed in these experiments.
The DAT subclones were in the pSE420-cHis vector/E. coli HMS174 host (Novagen, San Diego, Calif.) with the exception of the following subclones: SEQ ID NO:930, 932, 936 were in the pET101 D-Topo vector/BL21Star(DE3) host (Invitrogen, Carlsbad, Calif.); SEQ ID NO:934 was in the pET101 D-Topo vector/BL21 CODON PLUSRILTM host (Stratagene, La Jolla, Calif.); SEQ ID NO:938, 942, 944, 946 were in the pSE420 vector/XL1BLUETM host (Stratagene, La Jolla, Calif.); SEQ ID NO:940, 948, 950, 962 and 966 were in the pSE420-c-His vector/XL1BLUETM host (Stratagene, La Jolla, Calif.); and SEQ ID NO:928 was in the pQET1 vector/M15pREP4 host (pQET1 described in U.S. Pat. Nos. 5,814,473 and 6,074,860; M15pREP4 from Qiagen; Valencia, Calif.).
The subclones were grown, lysed and lyophilized according to the procedures described in Example 1. Samples were tested for activity on R,R-monatin as well as D-tryptophan (as described in Example 1). For the monatin DAT assay, DATs were incubated with 25 mM R,R-monatin, 25 mM pyruvic acid sodium salt, and 0.08 mM PLP (pH 8) at 30° C. For the D-tryptophan DAT assay, DATs were incubated with 10 mM D-tryptophan, 25 mM pyruvic acid soldium salt, and 0.08 mM PLP (pH 8) at 30° C. All DATs were loaded at 0.8 mg/mL total protein in both assays.
At indicated timepoints, 50 μL of the reaction product was added to 150 μL of ice-cold acetonitrile. Samples were vortexed for 30 seconds and the supernatant was then diluted ten-fold in methanol. Samples were then analyzed by LC/MS/MS (as described in Example 1) to monitor the D-alanine formed. The tables below show the D-aminotransferase activity on both substrates.







TABLE 4







Activity of D-aminotransferase subclones


on R,R-monatin and D-tryptophan











Activity on
Activity on




R,R-monatin
D-tryptophan



μg/mL
μg/mL



D-alanine formed
D-alanine formed
Relative


SEQ ID NO:
at indicated hour
at indicated hour
Expression





928
30@24 hr
NT
+


938
122@24 hr 
NT
++


940
 5@24 hr
NT
ND


942
12@24 hr
NT
ND


944
75@24 hr
NT
ND


946
39@24 hr
NT
ND


948
200@0.5 hr 
441@0.5 hr 
ND


950
 75@0.5 hr
452@0.5 hr 
ND


962
NT
NT
+


964
 7@24 hr
 ND@24 hr  
++


966
NT
NT
++


968
6.7@24 hr 
52@24 hr
+++


886
NT
NT
++


(expressed in


XL1Blue cells)


886
15.4@24 hr  
143@24 hr 
+++


(expressed in E. coli


HMS174 cells)


888
NT
NT
++


(expressed in XL1


Blue cells)


888
 7@24 hr
317@24 hr 
+++


(expressed in


HMS174 cells)


890
NT
NT
++


(expressed in XL1


Blue cells)


890
54@24 hr
278@24 hr 
+++


(expressed in


HMS174 cells)


892
NT
NT
+


(expressed in XL1


Blue cells)


892
113@24 hr 
<5@24 hr
++


(expressed in


HMS174 cells)


894
NT
NT
ND


(expressed in XL1


Blue cells)


894 (expressed in
16@24 hr
116@24 hr 
+


HMS174 cells)


866
28@24 hr
NT
+++


868
<1@24 hr
NT
+++


970
10.8@24 hr  
NT
+


870
123.5@24 hr  
NT
+++


872
62.3@24 hr  
NT
+++


874
46.5@24 hr  
NT
+++


876
44@24 hr
NT
++


878
37@24 hr
NT
+++


972
<5@24 hr
NT
+


880
72.4@24 hr  
79.6@24 hr  
+


882
158.8@24 hr  
344@2 hr 
+++


884
290@24 hr 
363@2 hr 
++


896
54@24 hr
450@2 hr 
+++


898
466@24 hr 
300@24 hr 
+


900
135@24 hr 
154@24 hr 
+


902
280@24 hr 
130@24 hr 
++


904
170@24 hr 
140@24 hr 
+


906
700@24 hr 
500@24 hr 
+++


908
55@24 hr
45@24 hr
+ insoluble


910
384@24 hr 
240@24 hr 
+++


912
NT
NT
ND


914
NT
NT
ND


916
NT
NT
ND


918
NT
NT
ND


920
NT
NT
ND


922
NT
NT
ND


924
NT
NT
ND


926
NT
NT
ND


974
NT
NT
ND


(expressed in


HMS174 cells)


974
NT
NT
ND


(expressed in


XL1 Blue cells)


930
NT
NT
ND


932
NT
NT
ND


934
NT
NT
ND


936
NT
NT
ND


976
NT
<5@24 hr
++


(expressed in


LX1 Blue cells)





NT, not tested;


ND, not detected under conditions used;


+, low expression,


++, moderate expression,


+++, high expression






It should be noted that there are only very conservative differences between the subclones listed above and their native sequences that are also in the sequence listing. For example, quite often, a start or stop codon was modified to be more efficient for expression in E. coli. It is expected that cloning of the wildtype sequences would give similar results in terms of DAT activity.

Part B
Example 3
Detection of Monatin, MP, Tryptophan, Alanine, and HMG
This example describes the analytical methodology associated with the further characterization of selected D-aminotransferase (DAT) enzymes.
LC/MS/MS Multiple Reaction Monitoring (MRM) Analysis of Monatin and Tryptophan
Analyses of mixtures for monatin and tryptophan derived from biochemical reactions were performed using a Waters/MICROMASS® liquid chromatography-tandem mass spectrometry (LC/MS/MS) instrument including a Waters 2795TM liquid chromatograph with a Waters 996 Photo-Diode Array (PDA) absorbance monitor placed in series between the chromatograph and a MICROMASS® QUATTRO ULTIMA® triple quadrupole mass spectrometer. LC separations were made using an Xterra MS C8 reversed-phase chromatography column, 2.1 mm×250 mm at 40° C. The LC mobile phase consisted of A) water containing 0.3% formic acid and 10 mM ammonium formate and B) methanol containing 0.3% formic acid and 10 mM ammonium formate.
The gradient elution was linear from 5% B to 45% B, 0-8.5 min, linear from 45% B to 90% B, 8.5-9 mM, isocratic from 90% B to 90% B, 9-12.5 min, linear from 90% B to 5% B, 12.5-13 min, with a 4 min re-equilibration period between runs. The flow rate was 0.27 mL/min, and PDA absorbance was monitored from 210 nm to 400 nm. All parameters of the ESI-MS were optimized and selected based on generation of protonated molecular ions ([M+H]+) of the analytes of interest, and production of characteristic fragment ions. The following instrumental parameters were used for LC/MS/MS Multiple Reaction Monitoring (MRM) analysis of monatin and tryptophan: Capillary: 3.5 kV; Cone: 40 V; Hex 1: 20 V; Aperture: 0 V; Hex 2: 0 V; Source temperature: 100° C.; Desolvation temperature: 350° C.; Desolvation gas: 500 L/h; Cone gas: 50 L/h; Low mass resolution (Q1): 12.0; High mass resolution (Q1): 12.0; Ion energy: 0.2; Entrance: −5 V; Collision Energy: 8; Exit: 1 V; Low mass resolution (Q2): 15; High mass resolution (Q2): 15; Ion energy (Q2): 3.5; Multiplier: 650. Four monatin-specific parent-to-daughter MRM transitions and one tryptophan specific parent-to-daughter transition are used to specifically detect monatin and tryptophan in in vitro and in vivo reactions. The transitions monitored are 293.08 to 157.94, 293.08 to 167.94, 293.08 to 130.01, and 293.08 to 256.77. Tryptophan is monitored with the MRM transition 205.0 to 146.0. For internal standard quantification of monatin and tryptophan, four calibration standards containing four different ratios of each analyte to d5-tryptophan and d5-monatin, are analyzed. These data are subjected to a linear least squares analysis to form a calibration curve for monatin and tryptophan. To each sample is added a fixed amount of d5-tryptophan and d5-monatin (d5-monatin was synthesized from d5-tryptophan according to the methods from WO 2003/091396 A2), and the response ratios (monatin/d5-monatin; tryptophan/d5-tryptophan) in conjunction with the calibration curves described above are used to calculate the amount of each analyte in the mixtures. Parent-to-daughter mass transitions monitored for d5-tryptophan and d5-monatin are 210.0 to 150.0, and 298.1 to 172.0 and 298.1 to 162.00 respectively.
Chiral LC/MS/MS (MRM) Measurement of Monatin
Determination of the stereoisomer distribution of monatin in biochemical reactions was accomplished by derivatization with 1-fluoro-2-4-dinitrophenyl-5-L-alanine amide (FDAA), followed by reversed-phase LC/MS/MS MRM measurement.
Derivatization of Monatin with FDAA
To 50 μL of sample or standard and 10 μL of internal standard was added 100 μL of a 1% solution of FDAA in acetone. Twenty μL of 1.0 M sodium bicarbonate was added, and the mixture was incubated for 1 h at 40° C. with occasional mixing. The sample was removed and cooled, and neutralized with 20 μL of 2.0 M HCl (more HCl may be required to effect neutralization of a buffered biological mixture). After degassing was complete, samples were ready for analysis by LC/MS/MS.
LC/MS/MS Multiple Reaction Monitoring for the Determination of the Stereoisomer Distribution of Monatin
Analyses were performed using the LC/MS/MS instrumentation described in the previous sections. The LC separations capable of separating all four stereoisomers of monatin (specifically FDAA-monatin) were performed on a Phenomenex Luna® 2.0×250 mm (3 μm) C18 reversed phase chromatography column at 40° C. The LC mobile phase consisted of A) water containing 0.05% (mass/volume) ammonium acetate and B) acetonitrile. The elution was isocratic at 13% B, 0-2 min, linear from 13% B to 30% B, 2-15 min, linear from 30% B to 80% B, 15-16 min, isocratic at 80% B 16-21 min, and linear from 80% B to 13% B, 21-22 min, with a 8 min re-equilibration period between runs. The flow rate was 0.23 mL/min, and PDA absorbance was monitored from 200 nm to 400 nm. All parameters of the ESI-MS were optimized and selected based on generation of deprotonated molecular ions ([M−H]) of FDAA-monatin, and production of characteristic fragment ions.
The following instrumental parameters were used for LC/MS analysis of monatin in the negative ion ESI/MS mode: Capillary: 3.0 kV; Cone: 40 V; Hex 1: 15 V; Aperture: 0.1 V; Hex 2: 0.1 V; Source temperature: 120° C.; Desolvation temperature: 350° C.; Desolvation gas: 662 L/h; Cone gas: 42 L/h; Low mass resolution (Q1): 14.0; High mass resolution (Q1): 15.0; Ion energy: 0.5; Entrance: 0 V; Collision Energy: 20; Exit: 0 V; Low mass resolution (Q2): 15; High mass resolution (Q2): 14; Ion energy (Q2): 2.0; Multiplier: 650. Three FDAA-monatin-specific parent-to-daughter transitions were used to specifically detect FDAA-monatin in in vitro and in vivo reactions. The transitions monitored for monatin were 542.97 to 267.94, 542.97 to 499.07, and 542.97 to 525.04. Monatin internal standard derivative mass transition monitored was 548.2 to 530.2. Identification of FDAA-monatin stereoisomers was based on chromatographic retention time as compared to purified monatin stereoisomers, and mass spectral data. An internal standard was used to monitor the progress of the reaction and for confirmation of retention time of the S,S stereoisomer.
Liquid Chromatography-Post Column Fluorescence Detection of Amino Acids, Including Tryptophan, Monatin, Alanine, and HMG
Procedure for Trytophan, Monatin, and Alanine
Liquid chromatography with post-column fluorescence detection for the determination of amino acids in biochemical reactions was performed on a Waters 2690 LC system or equivalent combined with a Waters 474 scanning fluorescence detector, and a Waters post-column reaction module (LC/OPA method). The LC separations were performed on an Interaction-Sodium loaded ion exchange column at 60° C. Mobile phase A was Pickering Na 328 buffer (Pickering Laboratories, Inc.; Mountain View, Calif.). Mobile phase B was Pickering Na 740 buffer. The gradient elution was from 0% B to 100% B, 0-20 min, isocratic at 100% B, 20-30 min, and linear from 100% B to 0% B, 30-31 min, with a 20 min re-equilibration period between runs. The flow rate for the mobile phase was 0.5 mL/min. The flow rate for the OPA post-column derivatization solution was 0.5 mL/min. The fluorescence detector settings were EX 338 nm and Em 425 nm. Norleucine was employed as an internal standard for the analysis. Identification of amino acids was based on chromatographic retention time data for purified standards.
Procedure for HMG
Samples from biochemical reactions were cleaned up by solid phase extraction (SPE) cartridges containing C18 as the packing material and 0.6% acetic acid as the eluent. The collected fraction from SPE was then brought up to a known volume and analyzed using HPLC post-column O-Phthaladehyde (OPA) derivatization with a florescence detector. Chromatographic separation was made possible using a Waters 2695 liquid chromatography system and two Phenomenex AquaC18 columns in series; a 2.1 mm×250 mm column with 5 μm particles, and a 2.1 mm×150 mm column with 3 μm particles. The temperature of the column was 40° C. and the column isocratic flow rate was 0.18 mL/min. The mobile phase was 0.6% acetic acid. OPA post-column derivatization and detection system consists of a Waters Reagent Manager (RMA), a reaction coil chamber, a temperature control module for the reaction coil chamber, and a Waters 2847 Florescent detector. The OPA flow rate was set at 0.16 mL/min, and the reaction coil chamber was set to 80° C. The florescence detector was set with an excitation wavelength of 348 nm and an emission wavelength of 450 nm. Other parameters controlling detector sensitivity, such as signal gain and attenuation, were set to experimental needs. Quantification of HMG was based off of the molar response of glutamic acid.
Detection of MP by LC/MS
Liquid chromatography separations were made using Waters 2690 liquid chromatography system and a 2.1 mm×50 mm. Agilent Eclipse XDB-C18 1.8 μm reversed-phase chromatography column with flow rate at 0.25 mL/min and gradient conditions as follows:












Time (min)
A %
B %

















0.00
95
5


0.2
95
5


1.2
5
95


4.5
5
95


5.0
95
5


10
95
5









The mobile phase A was 0.3% (v/v) formic acid with 10 mM ammonium formate, and mobile phase B was 0.3% formic acid w/ 10 mM ammonium formate in 50:50 methanol/acetonitrile. The column temperature was 40° C.
Parameters for the Micromass ZQ quadrupole mass spectrometer operating in negative electrospray ionization mode (−ESI) were set as follows: Capillary: 2.2 kV; Cone: 35 V; Extractor: 4 V; RF lens: 1 V; Source temperature: 120° C.; Desolvation temperature: 380° C.; Desolvation gas: 600 L/h; Cone gas: Off; Low mass resolution: 15.0; High mass resolution: 15.0; Ion energy: 0.2; Multiplier: 650. Single ion monitoring MS experiment was set up to allow detection selectively for m/z 290.3, 210.3, 184.3, and 208.4. The m/z 208.4 is the deprotonated molecular [M−H]− ion of the internal standard d5-tryptophan.
Detection of MP by LC/MS/MS
LC separations were made using Waters HPLC liquid chromatography system and a 2.1 mm×50 mm Agilent Eclipse XDB-C18 1.8 μm reversed-phase chromatography column with flow rate at 0.25 mL/min and gradient conditions are as follows:












Time (min)
A %
B %

















0.00
95
5


0.7
95
5


3.0
5
95


4.0
5
95


4.3
95
5


6.0
95
5









Mobile phase A was 0.3% (v/v) formic acid with 10 mM ammonium formate, and B was 0.3% formic acid with 10 mM ammonium formate in 50:50 methanol/acetonitrile. The column temperature was 40° C.
Parameters on Waters Premier XE triple quadrupole mass spectrometer for LC/MS/MS Multiple Reaction Monitoring (MRM) experiments operating in negative electrospray ionization mode (−ESI) were set as the following; Capillary: 3.0 kV; Cone: 25 V; Extractor: 3 V; RF lens: 0 V; Source temperature: 120° C.; Desolvation temperature: 350° C.; Desolvation gas: 650 L/hr; Cone gas: 47 L/hr; Low mass resolution (Q1): 13.5; High mass resolution (Q1): 13.5; Ion energy (Q1): 0.5 V; Entrance: 1 V; Collision Energy: 18 V; Exit 1: 19; Low mass resolution (Q2): 15; High mass resolution (Q2): 15; Ion Energy (Q2): 2.0; Multiplier: 650. Four parent-to-daughter MRM transitions were monitored to selectively detect Monatin precursor (MP) and d5-Monatin precursor (d5-MP); d5-MP was used as an internal standard (I.S.). The four MRM transitions were 290.1 to 184.1, 290.1 to 210.1, 290.1 to 228.1, and 295.1 to 189.1. Two of these transitions, 290.1 to 184.1 for MP, and 295.1 to 189.1 for d5-MP, were used for generating calibration curves and for quantification purposes. Transitions of 290.1 to 210.1 and 290.1 to 228.1 were used as qualitative secondary confirmation of MP.
Production of Monatin and MP for Standards and for Assays
Production of Monatin
A racemic mixture of R,R and S,S monatin was synthetically produced as described in U.S. Pat. No. 5,128,482. The R,R and S,S monatin were separated by a derivatization and a hydrolysis step. Briefly, the monatin racemic mixture was esterified, the free amino group was blocked with carbamazepine (CBZ), a lactone was formed, and the S,S lactone was selectively hydrolyzed using an immobilized protease enzyme. The monatin can also be separated as described in Bassoli et al., Eur. J. Org. Chem., 8:1652-1658, (2005).
MP Production
R-MP was produced by the transamination of R,R monatin using AT-103 broad range D-aminotransferase (BioCatalytics, Pasadena, Calif.) in 0.1 M potassium phosphate buffer, using sodium pyruvate as the amino acceptor. S-MP was produced by the transamination of S,S monatin using AT-102 L-aminotransferase (BioCatalytics) in 0.1 M potassium phosphate buffer, using sodium pyruvate as the amino acceptor. Both reactions were carried out at 30° C. and at a pH of approximately 8.0-8.3, for approximately 20 hours. Both compounds were purified using preparative scale HPLC with a Rohm and Haas (Philadelphia, Pa.) hydrophobic resin (XADTM 1600), eluting in water. Samples containing greater than 90% purity monatin precursor were collected and freeze-dried.
Example 4
Protein Preparation Methods
This example describes the methodology used for cloning, expression, cell extract preparation, protein purification, and protein quantification for secondary characterization of selected DATs.
Those of skill in the art would realize that the presence of activity in a polypeptide encoded from a subcloned (e.g., a fragment) or otherwise modified (e.g., tagged) nucleic acid is considered predictive of the presence of activity in the corresponding polypeptide encoded from the full-length or wild type nucleic acid.
Amplification of DAT-Encoding Genes for Cloning into Topo Plasmids
PCR reactions for Topo cloning (using either Pfu Turbo or Cloned Pfu from Stratagene) were as follows: 1× recommended buffer for the polymerase enzyme, 0.2 mM dNTPs, 0.5 μM of each primer, and 1 μl per 50 μl of reaction of the polymerase (2.5 units). The reactions contained approximately 5-100 ng of template DNA per reaction. A 94° C. hot start for 2 minutes was used for PCRs, as well as a melting temperature of 94° C. The annealing temperature was dependent on the Tm of the primers, and was either 30 or 60 seconds. The extension time (at 72° C.) was at least 2 min per kb. The reaction products were normally separated on a 1×TAE 1% agarose gel, and bands of appropriate sizes were purified with QIAquick Gel Extraction Kit as recommend by the manufacturer except an elution volume of 10 to 50 μl was used. Volumes of 1 to 4 μl of the purified PCR product were used for ligation with the pCRII-Topo Blunt plasmid (Invitrogen, Carlsbad, Calif.) as recommended by the manufacturer.
Cloning of DATs in pET30a for Untagged Expression
The DATs having the sequence shown in SEQ ID NO:945, 947, 949, 891, 893, 869, 873, 877, 881, 883, and 895 (encoding the polypeptides having the sequence of SEQ ID NO:946, 948, 950, 892, 894, 870, 874, 878, 882, 884, and 896) were amplified from plasmids or PCR products with Pfu Turbo (Stratagene, La Jolla, Calif.) and primers adding a Nde I at the 5′ end and either a Not I or BamH I restriction site at the 3′ end. The PCR fragments were cloned into pCR-Blunt II-Topo (Invitrogen, Carlsbad, Calif.) as recommended by the manufacturer. The sequence was verified by sequencing (Agencourt, Beverly, Mass.) and inserts with the correct sequences were then released from the vector using the appropriate restriction enzymes and ligated into the Nde I and Not I (or BamH I) restriction sites of pET30a. See Table 5 for specific primers.
The DAT nucleic acid having the sequence of SEQ ID NO:155 (encoding the polypeptide having SEQ ID NO:156) was amplified with Pfu Turbo (Stratagene) and primers adding a Nde I and Hind III restriction site at the 5′ and 3′ end, respectively. The PCR fragments were digested using Nde I and Hind III restriction enzymes and ligated into the Nde I and Hind III restriction sites of pET30a. See Table 5 for specific primers. It should be noted that the polypeptide having the sequence of SEQ ID NO:156 appeared to contain the following leader sequence with a probability of 0.991 (as determined by SignalP, as discussed in Nielsen, 1997, Protein Engineering, 10:1-6): KNSPIIAAYRAATPGSAAA (SEQ ID NO:1084). The nucleic acid encoding this DAT polypeptide was cloned with the apparent leader sequence.







TABLE 5 







Primers for amplification









Amplifies

SEQ


SEQ ID

ID


NO:
PCR primers
NO:












945
5′-CCGCCCCATATGAACGCACTAGGATATTACAACGGAAAATGG-3′
978



5′-GGCGGATCCTTATCCAAAGAATTCGGCACGAGCTGTC-3′
979


 


947
5′-CCGCCCCATATGCGCGAAATTGTTTTTTTGAATGGG-3′
980



5′-CGGATCCCTAAACCATCTCAAAAAACTTTTGCTGAATAAACCGTG-3′
981


 


949
5′-CCGCCCCATATGTTGGATGAACGGATGGTGTTCATTAAC-3′
982



5′-GGCGGATCCCTAGTCCACGGCATAGAGCCACTCGG-3′
983


 


891
5′-GGCCGCATATGGACGCACTGGGATATTACAACGGAAAATG-3′
984



5′-GGCCGCGGCCGCCTATGCCTTTCTCCACTCAGGCGTGTAGC-3′
985


 


893
5′-GGCCGCATATGGACGCACTGGGATATTACAACGGAAAATG-3′
986



5′-GGCCGCGGCCGCCTATACTGTGCTCCACTCAGGCGTGTAGCC-3′
987


 


869
5′-CATATGTATTCATTATGGAATGATCAAATAGTGAAGG-3′
988



5′-GCGGCCGCCTATTTATTCGTAAAAGGTGTTGGAATTTTCG-3′
989


 


873
5′-CATATGAGCACCCCGCCGACCAATC-3′
990



5′-GCGGCCGCCTAGGCCGCCTTCACTTCACGCTC-3′
991


 


877
5′-CATATGAGCACCCCGCCAACCAATTC-3′
992



5′-GCGGCCGCCTACGCGGCCTTCACTTCGCGC-3′
993


 


881
5′-TCCAGGCATATGAGCACAGTATATTTAAATGGCC-3′
994



5′-CCAGTAGCGGCCGCCTAACACTCAACACTATACTTATGC-3′
995


 


883
5′-TCTAGGCATATGGTTTATCTGAACGGGCG-3′
996



5′-ACTGTAGCGGCGGCCTATCCGAGGGACGCGTTGG-3′
997


 


895
5′-CATATGAAAGAGCTGGGCTATTACAACGGAAAAATC-3′
998



5′-GCGGCCGCCTATGACCTCCACCCCTGATTTCCAAAATAC-3′
999


 


155
5′-CTAGGATTCCATATGAAGAATTCGCCGATCATC-3′
1000



5′-CGAAGCTTCAACAGCGGCCGCTTAAAG-3′
1001









Site-Directed Mutagenesis

Site-directed mutagenesis was performed using QuikChange Multi Site-Directed Mutagenesis Kit (Stratagene, La Jolla, Calif.) according to the manufacturer's instructions. To generate the SEQ ID NO:870 T242N mutant, the pET30a untagged construct described in Example 10 was used as the template. To generate SEQ ID NO:220 G240N and SEQ ID NO:220 T241N mutants, the pET30a construct with a C-terminal his tag described in Example 10 was used as the template. The mutagenic primers used are listed below in Table 6. All the desired mutations were confirmed by DNA sequencing.







TABLE 6 







Primer sequences









Mutant




polypeptide




designation

SEQ ID


(SEQ ID NO:)
Sequence
NO:





870 T242N
5′-AATTATTTGTTTCATCAACAAATTC
1002



TGAAATTACGCCGGTTATTG-3′



 


220 G240N
5′-CTTGTGTCCAGCAGCAACACACTCG
1003



GCCTTAG-3′



 


220 T241N
5′-GTCCAGCAGCGGCAACCTCGGCCTT
1004



AGCGCC-3′









Cloning of DAT PCR Products in pET30a for the Expression as Untagged Protein

DAT nucleic acids having the sequences shown in SEQ ID NO:177, 179, 153, 165, 181, 217, 187, 189, 207, 219, 215, 195, 199, 197, 209, 201, 221, 235, 203, 237, 239, 223, 225, 227, 229, 231, 245, 213, 155, 169, 171, 167, 173, and 175 (encoding DAT polypeptides having the sequence shown in SEQ ID NO:178, 180, 154, 166, 182, 218, 188, 190, 208, 220, 216, 196, 200, 198, 210, 202, 222, 236, 204, 238, 240, 224, 226, 228, 230, 232, 246, 214, 156, 170, 172, 168, 174, and 176) were received as PCR products with Nde I and Not I compatible ends, as well as extraneous nucleotides to improve cutting efficiencies.
The DAT PCR products contained an NdeI restriction enzyme site at the 5′ end and a NotI site at the 3′ end. The PCR fragments were first cloned into pCR4 TOPO or pCR-Blunt II-TOPO vector (Invitrogen). After the DNA sequences were verified by sequencing, the DAT genes were released from the TOPO plasmids by the digestion of NdeI and NotI and ligated into the pET30a vector which had been cut using the same restriction enzymes. DAT genes containing either an NdeI or NotI site internally were amplified using primers with compatible restriction enzyme sites and cloned into pET30a. For example, the DAT nucleic acid having the SEQ ID NO:155 (encoding the polypeptide having the sequence of SEQ ID NO:156) was reamplified from the original PCR product using NdeI and HindIII restriction sites for cloning into pET30a.
Cloning of DATs in pET30a for the Expression as the C-His-Tagged Fusion Protein
Nucleic acids encoding DAT 4978 and DAT 4978 T243N (described in Example 6), SEQ ID NO:870 (expressed from plasmid pSE420-cHis), and SEQ ID NO:870 T242N, SEQ ID NO:176 and SEQ ID NO:220 (untagged versions expressed from pET30) were re-amplified with Pfu Turbo (Stratagene) and primers that placed an XhoI site immediately upstream of the stop codons. PCR fragments were cloned into pCR-Blunt II-Topo (Invitrogen, Carlsbad, Calif.) as recommended by the manufacturer or directly cloned into the Nde I and Xho I restriction sites of pET30a The sequence was verified by sequencing (Agencourt, Beverly, Mass.) and an insert with the correct sequence was then released from the vector using Nde I and Xho I restriction enzymes and the insert was ligated into the Nde I and Xho I restriction sites of pET30a. See Table 7 for specific primers and plasmids names.







TABLE 7 







Primer sequences









Polypeptide

SEQ


designation

ID


(SEQ ID NO:)
Sequence
NO





870 and
5′-CATATGTATTCATTATGGAATGATCAAA
1005


870 T242N
TAGTGAAGG-3′




5′-CTCGAGTTTATTCGTAAAAGGTGTTGGA
1006



ATTTTCGTTTC-3′



 


DAT4978 and
5′-CATATGAGTTATAGCTTATGGAATGACC
1007


DAT4978T243N
AAATTGTGAATG-3′




5′-CTCGAGTGCGCGAATACCTTTTGGGATT
1008



TTCGTATC-3′



 


220
5′-CTAGGATCTCATATGGACGCACTGGGAT
1009



ATTAC-3′




5′-GCCTCGAGTACCCTGCTCCACTCAGG-3′
1010


 


176
5′-CTAGGATTCCATATGGACGCGCTTGGCT
1011



ATTAC-3′




5′-GCCTCGAGTACCCTGCTCCACGCAG-3′
1012









Cloning of CbDAT and CaDAT

A Clostridium beijerinckii D-amino-transferase was PCR amplified using Pfu Turbo (Stratagene) and C. beijerinckii genomic DNA with PCR primers containing a 5′ NdeI and a 3′ NotI restriction site. Genomic DNA was extracted from C. beijerinckii (ATCC 51743) using the Purrgene genomic DNA purification kit (Gentra Systems, Minneapolis, Minn.) per the manufacturer's instructions.
The 824 by PCR product was gel extracted using a Qiagen Gel Extraction Kit and TOPO cloned into pCR-Blunt II-Topo (Invitrogen). After verifying the sequence, the gene was ligated to Nde I/Not I cut pET28b and pET30a vectors using a Rapid Ligation kit (Roche).
The C. acetobutylicum DAT was amplified by PCR using genomic DNA (ATCC 824) and the Stratagene Optiprime PCR Kit with PCR primers containing a 5′ NdeI and a 3′ NotI restriction site. The successful PCR reaction was cloned into the pCR4 TOPO vector and TOPO clones were sequenced. A positive TOPO clone was digested with restriction enzymes NdeI and Nod and the DAT fragment ligated into pET30a vector digested with the same restriction enzymes.







TABLE 8 







Primer sequences











SEQ


Designation
Sequence
ID NO:





CbDAT1
5′-GGTTCATATGGAGAATTTAGGT
1013



TATTA-3′




5′-GGAAGCGGCCGCATATTCTACC
1014



TCCTATTCTG-3′



 


CaDAT2
5′-GGTTCATATGAAAGATTTAGGA
1015



TATTACAATGGAGAATAC-3′




5′GGAAGCGGCCGCTTAATTTGTTT
1016



CTTCCAAAAATTCATTAAG-3′









In Vitro Synthesis of LsDAT

The Lactobacillus salivarius DAT was assembled using a revised method based on Stemmer et al., 1995, Gene, 164:49-53. Briefly, 43 oligonucleotides (primarily 40 mers) were ordered from IDT based on the gene sequence and its complementary DNA sequence, with 20 basepair overlaps between the sense and antisense strands. See Table 9 for the primer list. The primers were diluted to 250 μM in water and 5 μL of each primer was mixed together in a microfuge tube. PCR was carried out as follows: per 100 μL reaction, 1.5 μL of the primer pool, 4 μL dNTPs, 1×XL PCR buffer, 1 mM magnesium acetate, 2 μL rTth polymerase (Roche, Indianapolis, Ind.), and 0.25 μL Pfu polymerase (Stratagene, La Jolla, Calif.) were added. A 3 minute hot start was done at 94° C., followed by 15 cycles of 94° C. for 30 seconds, 42° C. for 30 seconds, and 68° C. for 15 seconds. Ten more cycles were done with an extension time of 30 seconds (at 68° C.). Ten more cycles were performed with an extension time of 75 seconds. Lastly, a chain extension step was done for seven minutes at 68° C.







TABLE 9 







Oligos used to synthesis LsDAT









Designation
Sequence (5′→3′)
SEQ ID NO:





F1:
ATGAAGCAAG TTGGATACTA CAATGGTACT ATCGCTGATT
1017


 


F2:
TAAATGAACT TAAGGTGCCT GCTACTGATC GTGCACTTTA
1018


 


F3:
TTTTGGTGAT GGTTGCTACG ATGCAACTAC ATTTAAGAAC
1019


 


F4:
AATGTTGCAT TTGCCTTAGA AGATCATCTT GATCGTTTTT
1020


 


F5:
ATAATAGTTG TCGCCTACTA GAGATCGATT TCCCTTTAAA
1021


 


F6:
TCGCGATGAA CTTAAAGAAA AGCTTTACGC TGTTATTGAT
1022


 


F7:
GCTAACGAAG TTGATACTGG TATCCTTTAT TGGCAAACTT
1023


 


F8:
CACGTGGTTC TGGTTTACGT AACCATATTT TCCCAGAAGA
1024


 


F9:
TAGCCAACCT AATTTATTAA TTTTTACTGC TCCTTATGGT
1025


 


F10:
TTAGTTCCAT TTGATACTGA ATATAAACTT ATATCTCGCG
1026


 


F11:
AAGACACTCG CTTCTTACAT TGCAATATTA AAACTTTGAA
1027


 


F12:
TTTACTTCCA AACGTTATTG CAAGTCAAAA GGCTAATGAA
1028


 


F13:
AGTCATTGCC AAGAAGTGGT CTTCCATCGC GGTGACAGAG
1029


 


F14:
TTACAGAATG TGCACACTCT AACATCTTAA TTCTAAAAGA
1030


 


F15:
TGGCGTTCTT TGCTCCCCAC CTAGAGATAA TTTAATCTTG
1031


 


F16:
CCAGGAATTA CTTTGAAACA TCTCTTGCAA TTAGCAAAAG
1032


 


F17:
AAAATAATAT TCCTACTTCC GAAGCACCAT TCACTATGGA
1033


 


F18:
TGATCTTAGA AATGCTGATG AAGTTATTGT TAGTTCTTCA
1034


 


F19:
GCTTGTCTAG GTATTCGCGC AGTCGAGCTT GATGGTCAGC
1035


 


F20:
CTGTTGGTGG AAAAGATGGA AAGACTTTAA AGATCTTGCA
1036


 


F21:
AGATGCTTAT GCTAAGAAAT ATAATGCTGA AACTGTAAGT CGTTAA
1037


 


R1:
TAGTATCCAA CTTGCTTCAT
1038


 


R2:
AGGCACCTTA AGTTCATTTA AATCAGCGAT AGTACCATTG
1039


 


R3:
CGTAGCAACC ATCACCAAAA TAAAGTGCAC GATCAGTAGC
1040


 


R4:
TCTAAGGCAA ATGCAACATT GTTCTTAAAT GTAGTTGCAT
1041


 


R5:
TAGTAGGCGA CAACTATTAT AAAAACGATC AAGATGATCT
1042


 


R6:
TTTCTTTAAG TTCATCGCGA TTTAAAGGGA AATCGATCTC
1043


 


R7:
CCAGTATCAA CTTCGTTAGC ATCAATAACA GCGTAAAGCT
1044


 


R8:
ACGTAAACCA GAACCACGTG AAGTTTGCCA ATAAAGGATA
1045


 


R9:
TTAATAAATT AGGTTGGCTA TCTTCTGGGA AAATATGGTT
1046


 


R10:
TCAGTATCAA ATGGAACTAA ACCATAAGGA GCAGTAAAAA
1047


 


R11:
ATGTAAGAAG CGAGTGTCTT CGCGAGATAT AAGTTTATAT
1048


 


R12:
CAATAACGTT TGGAAGTAAA TTCAAAGTTT TAATATTGCA
1049


 


R13:
ACCACTTCTT GGCAATGACT TTCATTAGCC TTTTGACTTG
1050


 


R14:
AGAGTGTGCA CATTCTGTAA CTCTGTCACC GCGATGGAAG
1051


 


R15:
GTGGGGAGCA AAGAACGCCA TCTTTTAGAA TTAAGATGTT
1052


 


R16:
TGTTTCAAAG TAATTCCTGG CAAGATTAAA TTATCTCTAG
1053


 


R17:
GGAAGTAGGA ATATTATTTT CTTTTGCTAA TTGCAAGAGA
1054


 


R18:
CATCAGCATT TCTAAGATCA TCCATAGTGA ATGGTGCTTC
1055


 


R19:
GCGCGAATAC CTAGACAAGC TGAAGAACTA ACAATAACTT
1056


 


R20:
TCCATCTTTT CCACCAACAG GCTGACCATC AAGCTCGACT
1057


 


R21:
ATTTCTTAGC ATAAGCATCT TGCAAGATCT TTAAAGTCTT
1058


 


R22:
TTAACGACTT ACAGTTTCAG CATTAT
1059









A secondary amplification with primers L. sal DAT R Not I and L. sal DAT F Nde I (below) resulted in a band of the correct molecular weight. See Table 10 for these secondary amplification primer sequences.







TABLE 10 







Primer sequences









Designation
Sequence (5′→3′)
SEQ ID NO:





L. sal DAT R NotI
TTGGCCAAGCGGCCGCTTA
1060



ACGACTTACAGTTT



 


L. sal DAT F NdeI
GGTTCCAAGGCATATGAAG
1061



CAAGTTGGATACTA









The secondary PCR reaction was set up the same as above with the exception that only 2 primers were added. For the PCR template, 2.5 μl of the primary PCR reaction was used. A 3 minute hot start was done at 94° C., followed by 10 cycles of 94° C. for 30 seconds, 42° C. for 30 seconds, and 68° C. for 15 seconds. Ten more cycles were done with an increased annealing temp of 48° C. for 30 seconds with an extension time of 30 seconds (at 68° C.). Lastly, a chain extension step was done for seven minutes at 68° C.
The fragment was cloned into a pCR-BluntII-TOPO vector and the TOPO clones were sequenced. A positive TOPO clone was cut with NdeI and Nod and the DAT fragment ligated into pET30a vector digested with the same restriction enzymes.
Enzyme Preparation
E. coli strain BL21(DE3) was used as the host strain for the expression of DATs from pET-derived plasmids. E. coli strain TOP10 was used in all other DAT constructs. Single colonies of desired constructs were typically innoculated into Overnight Express II medium (Novagen) containing the appropriate amount of antibiotics. Following cultivation at 30° C. overnight, the cells were harvested by centrifugation when the OD600 was greater than 10. Alternatively, overnight cultures were utilized to innoculate cultures in LB medium containing the appropriate antibiotics. The cultures were grown at 30° C. to an OD600 of 0.5 to 0.9 and protein expression was induced with 1 mM IPTG for 4 h at the same temperature.
Cell extracts were prepared by adding 5 mL per g of cell pellet or 5 mL per 50 mL of overnight culture, of BugBuster® (primary amine-free) Extraction Reagent (EMD Biosciences/Novagen catalog #70923) with 5 μL/mL of Protease Inhibitor Cocktail II (EMD Bioscience/Calbiochem catalog #539132), 1 μl/ml of Benzonase® Nuclease (EMD Biosciences/Novagen catalog #70746), and 0.033 μl/ml of r-LysozymeTM solution (EMD Biosciences/Novagen catalog #71110) to the cells. The cell resuspension was incubated at room temperature for 15 min with gentle shaking. Following centrifugation at 16,100 rcf for 20 min at 4° C., the supernatant was removed as the cell-free extract.
Prior to using the enzyme preparation for monatin reactions, detergents and low molecular weight compounds were removed from the cell-free extract by passage through a PD-10 column (GE Healthcare, Piscataway, N.J.) that was previously equilibrated with potassium phosphate buffer (100 mM, pH 7.8) or EPPS buffer (100 mM, pH 8.2) containing 0.05 mM of PLP. The protein was eluted using the equilibration buffer. Protein concentrations were typically determined using the BioRad Coomassie plate assay (also known as the Bradford assay) plate assay with BSA (Pierce) as the standard. Occasionally, the BCA (Pierce) microtiter plate assay was used for protein determination, where noted. To estimate the concentration of the D-aminotransferase in the cell-free extracts, 1 mg/mL samples were loaded on the Experion (Bio-Rad, Hercules, Ca) electrophoresis system and the Experion Software (Version 2.0.132.0) was used to calculate the percentage of the soluble DAT protein in the cell-free extract. Alternatively, SDS-PAGE analysis was done and visual estimation was used to estimate percentage of expression.
The His-tagged fusion proteins were purified using either the GE Healthcare Chelating Sepharose Fast Flow resin or Novagen His-Bind columns. The purification using the Sepharose resin involved loading the cell-free extract onto a column that was previously equilibrated with potassium phosphate buffer (100 mM, pH 7.8) containing 200 mM of sodium chloride and 0.050 mM of PLP. The column was then washed successively using 3-5 column volumes of the equilibration buffer, 3-5 column volumes of the equilibration buffer containing 25 mM of imidazole and 3-5 column volumes of the equilibration buffer containing 50-100 mM of imidazole. The His-tagged protein was eluted off the column using 3-5 column volumes of the equilibration buffer containing 500 mM of imidazole. The eluate was concentrated using the Amicon (Billerica, Mass.) Centricon-70. The imidazole and sodium chloride salts in the concentrated protein solution were removed by passage through PD-10 desalting columns that were previously equilibrated using potassium phosphate buffer (100 mM, pH 7.8) (for DAT4978 and DAT4978 T243N) or EPPS buffer (100 mM, pH 8.2) (for SEQ ID NO:870 and SEQ ID NO:870 T242N) containing 50 μM of PLP. Protein concentrations were determined using Bio-Rad Protein Assay (Bio-Rad) and Albumin (Pierce) as a standard. Aliquots (0.5-1 mL) of the purified enzyme were stored at −80° C. until use. The purification of the His-tagged protein using the His-Bind columns followed the manufacture's instruction. The eluate from the column was desalted using the PD10 column as described above.
Example 5
Assay Procedures #2 for D-Aminotransferase Activity
Monatin Production Assay (Standard)
The following components were combined: 100 mM EPPS, pH 8.2; 200 mM sodium pyruvate; 100 mM of D-tryptophan; 50 μM PLP; 1 mM MgCl2; 0.01% Tween-80; 50 μg/mL of aldolase described in Example 6 (cell-free extract was used; the aldolase concentration was estimated based on the percentage reading from Experion chip) and an appropriate amount of DAT (typically 0.1-1 mg/mL).
Except for the PLP stock solution and the protein solutions, all other reagents were made using oxygen-free deionized water and stored in the anaerobic chamber. The reactions were set up in the anaerobic chamber at room temperature with constant gentle mixing. To take a time point, formic acid was added into an aliquot of the reaction mixture to a final concentration of 2% (v/v). Following centrifugation at 16,100 RCF for 5 min using a bench-top microfuge, the supernatant was filtered through a 0.2 μm nylon membrane filter. Samples were then diluted 20- to 100-fold with water prior to analysis by LC/MS/MS.
D-Tryptophan Transamination Assay
To compare the D-tryptophan transamination activities of certain D-aminotransferases, the following assays were performed. The assay mix contained: 0.5 mg/mL of cellular extract protein containing D-AT; 40 mM potassium phosphate pH 8.0; 20 mM D-tryptophan; 100 mM sodium pyruvate; and 50 μM PLP. The assays were incubated at 37° C. for 30 minutes and then placed on ice.
The extent of reaction was followed by measuring the amount of indole-3-pyruvate formed using the following assay: to 5 μl, 10 μl and 20 μl of reaction mix, 200 μl of the following solution was added: 0.5 mM sodium arsenate; 0.5 mM EDTA; and 50 mM sodium tetraborate (pH 8.5). Absorbance of the indole-3-pyruvate enol-borate complex at 325 nm was compared to a standard curve of indole-3-pyruvate prepared in the same solution.
Alanine formation can also be used to follow the extent of the D-tryptophan transamination reactions. Alanine concentrations were determined as described in Example 3.
R, R Monatin Transamination Assay
Assay conditions (final volume 2 mL) included: 0.01% Tween; 100 mM EPPS pH 8.2; 100 mM sodium pyruvate; approximately 3 mM R,R monatin; 0.5 mg/mL DAT; and 50 μM PLP. The extent of reaction was monitored by detection of alanine or R-MP formed using the protocols described in Example 3.
Example 6
Method for Obtaining DATs and an Aldolase
This method described the cloning of the aldolase used in monatin formation reactions with the D-aminotransferases, and D-aminotransferases previously isolated that were used for comparative purposes.
Aldolase
The aldolase used in monatin production assays from D-tryptophan was isolated and subcloned into pET vectors as described in WO 2007/103389 (referred to in that application as the aldolase of SEQ ID NO:276 encoded by the nucleic acid of SEQ ID NO:275).
DAT and DAT4978 T243N
A D-aminotransferase from ATCC #4978 (DAT 4978) was cloned as described in U.S. Publication No. 2006/0252135. A T243N mutant was made using the pET30 (untagged) DAT 4978 construct.
The primer for mutagenesis was designed following the suggestions listed in the Stratagene Multi-Change kit (La Jolla, Calif.). The primer was 5′-phosphorylated. Mutagenesis was done using the Stratagene Multi-Change kit following the manufacturer's instructions. The mutagenic oliognucleotide sequence is shown in Table 11.







TABLE 11 







Mutagenic oligonucleotide sequences











Amino





acid

SEQ


Mutant name
change
Primer
ID NO:





DAT4978T243N
T243N
5′-GTGATTGTTTCATCAACG
1062




AATTCAGAAGTAACGCC-3′









E. coli XL10-Gold cells (Stratagene) were transformed and the resultant purified plasmid preparations were sequenced to verify that the correct mutations were incorporated. The plasmid containing the DAT 4978 T243N was then transformed into E. coli BL21 (DE3) expression host
B. sphaericus DAT
A D-aminotransferase from B. sphaericus (ATCC number 10208) was cloned as described in US 2006/0252135. The protein was prepared as described in the same reference.
Example 7
Analysis of DATs
DAT polypeptides having the sequence shown in SEQ ID NO:928, 930, 932, 934, 936, 938, 940, 942, 944, 946, 948, and 950 were produced by expressing the corresponding nucleic acid in the vectors and in the compatible E. coli expression hosts described in Example 2. One skilled in the art can synthesize the genes encoding these D-aminotransferases using assembly PCR techniques such as those described in Example 4. Overnight cultures in LB medium containing carbenicillin (100 μg/mL) were diluted 100× in 100 mL of the same medium and grown in a 500 mL baffled flask. The culture was grown at 30° C. to an OD600 of 0.5 to 0.9, and protein expression was induced with 1 mM IPTG for 4 h at the same temperature. Samples for total protein were taken immediately prior to harvesting. Cells were harvested by centrifugation and washed once with 10 mL of potassium phosphate buffer pH 7.8. Cells were immediately frozen at −80° C. until cell extracts were prepared.
Cell extracts were prepared and desalted as described in Example 4 using 100 mM potassium phosphate as the buffer to elute and equilibrate the PD10 column. Total protein and DAT concentrations were determined as described.
Transamination of R,R monatin with pyruvate as the amino acceptor were performed as described in Example 5 except that 10 mM R,R monatin was utilized. Initial analyses of alanine, monatin, and monatin precursor levels were not consistent with each other and results were considered qualitative. The DAT polypeptide having the sequence of SEQ ID NO:948 appeared to show monatin precursor formation.
For further confirmation of activity, a monatin formation assay was done as described in the methods with a DAT concentration of approximately 0.2 mg/mL. As a control, 0.2 mg/mL concentration of purified B. sphaericus DAT was evaluated. After 2 and 21 hr, an aliquot was taken and formic acid was added to a final concentration of 2%, and the samples were frozen. Samples were then thawed, spun and filtered. Samples were analyzed for monatin using LC/MS/MS methodology and for tryptophan and alanine using the LC/OPA post-column fluorescence methodology described in Example 3. The DAT polypeptides having the sequence of SEQ ID NO:946 and 950 were capable of R,R monatin formation under the conditions tested. The DAT polypeptide having the sequence of SEQ ID NO:948 showed a loss of tryptophan and an increase in alanine formation, demonstrating its activity as a D-tryptophan transaminase. The DAT polypeptide having the sequence of SEQ ID NO:946 expressed well as determined by the amount of total protein but was not very soluble, which explains some inconsistent results. The DAT polypeptides having the sequence shown in SEQ ID NO:930, 932, 940, 942, and 944 did not yield visible bands on analysis with SDS-PAGE and, therefore, may be active if produced under different conditions. See Table 12 for results.







TABLE 12







Activity of DATs










Monatin




[mM]
Monatin [mM]


DAT Polypeptide (SEQ ID NO:)
Time = 2 hr
Time = 21 hr





928
nd
nd


930
nd
nd


932
nd
nd


934
nd
nd


936
nd
nd


938
nd
nd


940
nd
nd


942
nd
nd


944
nd
nd


946
0.1
0.6


948
nd
nd


950
0.4
3.1


B. sphaericus control DAT
0.8
4.4





nd = not detected under conditions tested






Analysis of DAT Polypeptides in pET30a

The DAT polypeptides having the sequence of SEQ ID NO:946, 948, and 950 were subcloned into pET30a as described in Example 4. Duplicate cultures of E. coli strain BL21 DE3 containing the DATs in pET30a were grown overnight in Overnight Express II (Solution 1-6, Novagen) at both 25 and 30° C. As a control, a strain containing pET30a plasmid without an insert was also grown. Cells were collected at an OD600 of 5-10. Cells were harvested by centrifugation and washed once with 10 mL of 100 mM potassium phosphate buffer pH 7.8. Cells were frozen at −80° C. until further processed.
Cell extracts were prepared as described in Example 4 using 100 mM potassium phosphate as the buffer to elute and equilibrate the PD 10 columns Total protein and DAT protein concentrations were determined as described. The DAT polypeptide having the sequence of SEQ ID NO:946 expressed well at 30° C. in the total protein fraction, but was not soluble as viewed by SDS-PAGE. The DAT polypeptides having the sequence of SEQ ID NO:948 and 950 expressed at the higher temperature also, but were soluble.
A monatin formation assay was done as described in Example 5 except with a DAT concentration of 0.1 mg/mL for the polypeptide of SEQ ID NO:946 (0.5 mg/mL for all others). As a positive control, purified B. sphaericus DAT at a 0.5 mg/mL concentration was also assayed. After 2 and 21 hr, an aliquot was taken, formic acid was added to a final concentration of 2%, and the samples were frozen until further processed. Samples were then thawed, spun and filtered. Samples were analyzed for monatin using LC/MS/MS, and for tryptophan and alanine using LC/OPA post-column fluorescence detection methods described in Example 3. The results are shown in Table 13. D-tryptophan consumption and alanine formation were shown for all the D-aminotransferases tested indicating that they all have activity on D-tryptophan. Under these conditions, only DAT polypeptides having the sequence of SEQ ID NO:946 and 948 appeared to have activity for monatin formation. It is possible that expression or stability differences between the two host systems are the reason why activity is seen in some cases but not in others.









TABLE 13






Monatin [mM]
Monatin [mM]


DAT polypeptide (SEQ ID NO)
time = 2 hr
time = 21 hr







pET30 (negative control)
nd
nd


946
0.4
1.8


948
nd
0.2


950
nd
nd


B. sphaericus positive control
1.8
8.6





nd, not detected under conditions tested






Example 8
Analysis of DATs in pSE420-cHis
DAT polypeptides having the sequence shown in SEQ ID NOs:886, 888, 890, 892 and 894 DATs were produced from the pSE420-cHis vector in E. coli HMS 174. One skilled in the art can synthesize the genes encoding these D-aminotransferases using assembly PCR techniques such as those described in Example 4. Overnight cultures of the various DAT constructs were grown in LB medium containing ampicillin (100 μg/mL) at 30° C. Fifty mL of the same medium was inoculated the next day with 1 mL of the overnight cultures. The cultures were grown at 30° C. until the OD600 nm reached approximately 0.5 and then induced with 1 mM IPTG. The cultures were further incubated for 4 h at 30° C. and then harvested by centrifugation at 3800 rcf for 15 min. The cells were washed with 1.5 mL of 50 mM potassium phosphate, pH 7.0 and centrifuged again. The supernatant was decanted and the cell pellets were weighed.
Cell extracts were prepared as described in the methods using 100 mM potassium phosphate as the buffer to elute and equilibrate the column Total and DAT concentrations were determined as described except BCA (Pierce) was used instead of Bradford for total protein determination. Two different vector only cultures were grown in the same E. coli hosts as the cloned DATs. All of the proteins produced visible bands on SDS-PAGE gels, but to differing degrees of solubility. Polypeptides having the sequence of SEQ ID NO:892 were not very soluble.
To compare the D-tryptophan transamination activities of each of the enzymes, the D-tryptophan transamination assay and the R,R monatin transamination assay described in Example 5 were performed. The D-tryptophan aminotransferase targeted using a final concentration of 0.5 mg/mL of cellular extract containing D-aminotransferase and 0.1 mg/mL of the purified B. sphaericus DAT as a control. Quantification of the DATs in the cellular extracts was difficult due to the low levels of soluble polypeptides. The DAT polypeptides having the sequence shown in SEQ ID NO:888, 892 and 894 showed good activity with D-tryptophan as a substrate during the 30 minute reaction. DAT polypeptides having the sequence shown in SEQ ID NO:886 and 890 had measurable activity above the no-enzyme control, but exhibited little activity under the conditions tested.
Monatin transamination experiments were performed at room temperature, taking samples after 0.5, 1 and 2 hours targeting 0.5 mg/mL of each DAT, including the purified positive control from B. sphaericus. The R,R monatin transamination samples were then analyzed for monatin and alanine. The amount of monatin remaining was quantified by LC/MS/MS; alanine formation was measured using the post-column derivatization method in Example 3. Under the conditions tested, the DAT polypeptides having the sequence shown in SEQ ID NOs:892 and 894 were active. The DAT polypeptide having the sequence of SEQ ID NO:894 appeared to have the highest activity for conversion of R,R monatin to R-MP. The trends were consistent when alanine formation was assayed. The alanine production numbers (in mM) for the various timepoints are shown in Table 14.







TABLE 14







Alanine formation (mM) from R,R monatin transamination reactions












DAT polypeptide






(SEQ ID NO:)
0.5 hr
1 hr
2 hr
















vector control 1
0.139
0.185
0.215



vector control 2
0.179
0.242
0.301



886
0.128
0.203
0.242



888
0.13
0.203
0.275



890
0.112
0.153
0.176



892
1.034
1.587
2.167



894
2.2
2.52
2.663



BsphDAT (purified)
0.287
0.519
0.894



no enzyme
0.043
0.035
0.037










DAT nucleic acids having the sequence shown in SEQ ID NO:891 and 893 were subcloned into pET30 as described in Example 4. These constructs were transformed into a variety of E. coli hosts carrying the DE3 lysogen for expression from a T7 promoter, including both K-12 and B strains of E. coli, and one strain that carried the pLysS plasmid. The clones were expressed in OvernightExpress System II as described in Example 4, with and without the addition of 0.5 mM pyridoxine, and analyzed by SDS-PAGE or Experion for expression. From these experiments, it became apparent that the proteins were expressing mostly in the insoluble fraction. Pyridoxine helped improve solubility to a small degree as did lowering the temperature from 37 to 30° C. for induction. Further work was done in cloning systems designed to maximize soluble expression (see Example 16-22).
Example 9
Analysis of CaDAT, CbDAT, and LsDAT in pET30a
The amino acid sequence shown in SEQ ID NO:894 was used to search for similar proteins available in the public databases. Three DATs were found that had similarity to SEQ ID NO:894. They were from Lactobacillus salivarus (47% identical at the protein level), Clostridium beijerinckii (57% identical at the protein level), and Clostridium acetobutylicum (60% identical at the protein level). The gene and protein sequences and their accession numbers are shown at the end of this example. FIG. 5 is an alignment (a sequence comparison) showing the consensus regions of these SEQ ID NO:894-like proteins of this invention. As highlighted in the figure, one can see a high degree of consensus regions indicating structural similarities.
These nucleic acids were cloned into pET30a, and the corresponding polypeptides expressed and tested for activity as described herein.
CbDAT
The D-aminotransferase from Clostridium beijerinckii (CbDAT) was cloned into pET30a (untagged) BL21 (DE3) and expressed using OVERNIGHT EXPRESS IITM (Novagen). The cells were collected at an optical density at 600 nm of approximately 9 and centrifuged at 4000 rcf for 15 min. The cells were washed once with 100 mM potassium phosphate pH 7.8 (cold), and spun again.
Cell extracts were prepared as described herein using 100 mM EPPS pH 8.2 as the buffer to elute and equilibrate the column. Total protein and DAT protein concentrations were determined as described except the BCA method (Pierce) was used instead of the Bradford (Coomassie) assay. The CbDAT expressed well but was only partially soluble.
A monatin formation assay was done as described in Example 5 but the activity of CbDAT (0.5 mg/mL) was also studied at pH 7.4 (with potassium phosphate as a buffer). As a control, purified B. sphaericus DAT (1 mg/mL) was assayed at pH 8.2. After 1, 2, 4, 8, and 23 hrs, aliquots were taken and formic acid was added to a final concentration of 2%. Samples were frozen at −80° C. until analyzed. Samples were then thawed, spun and filtered. Samples were analyzed for monatin using the LC/MS/MS methodology described in Example 3. Results are shown in Table 15. The amount of monatin produced were slightly higher for the assays carried out at pH 8.2. Similar experiments were performed with the polypeptides expressed from pET28 with an N-terminal His-tag. The activity of the tagged version appeared to be slightly less than that of the untagged, but still easily detectable.







TABLE 15







Activity over time













Monatin
Monatin
Monatin
Monatin
Monatin



(ppm)
(ppm)
(ppm)
(ppm)
(ppm)


DAT Enzyme
1 hr
2 hr
4 hr
8 hr
23 hr















CbDAT pET30
45
126
280
428
502


(7.4 mg/mL)


CbDAT pET30
67
189
344
436
568


(8.2 mg/mL)


B. sphaericus DAT
531
968
1742
2310
3706


(1 mg/mL)









CaDAT and LsDAT

The D-aminotransferases from Lactobacillus salivarus (LsDAT) and Clostridium acetobutylicum (CaDAT) were cloned into pET30a (untagged) BL21(DE3) and expressed using Overnight Express II (Novagen). The cells were collected when the culture reached an optical density at 600 nm of approximately 9 by centrifugation at 4000 rcf for 15 minutes.
Cell extracts were prepared as described herein using 100 mM EPPS pH 8.2 as the buffer to elute and equilibrate the column. Total protein and DAT protein concentrations were determined using the BCA (Pierce) protocol. Both enzymes expressed well and were soluble.
The assay was performed at room temperature under anaerobic conditions. As a control, purified B. sphaericus D-aminotransferase was assayed. Approximately 0.5 mg/mL of each DAT was used. After 0.5, 1, 2, 4, 6, 8 and 22 hr an aliquot was taken and formic acid added to a final concentration of 2% and the samples were frozen. Samples were then thawed, spun and filtered. Samples were analyzed for monatin using the LC/MS/MS methodology described in Example 3. Results are shown in Table 16.














TABLE 16






Monatin
Monatin
Monatin
Monatin
Monatin
Monatin
Monatin



(ppm)
(ppm)
(ppm)
(ppm)
(ppm)
(ppm)
(ppm)


DAT polypeptide 
0.5 hr
1 hr
2 hr
4 hr
6 hr
8 hr
22 hr






















B. sphaericus
76.6
194.4
457.6
860.8
1186
1770
2546


LsDAT
2.8
6.4
14.6
33
52
69.8
173


CaDAT
50.2
141.2
318.6
543.4
612
1144
668









The homologs of the DAT having the sequence shown in SEQ ID NO:894 were active. Since the homologs showing the conserved sequence above were all active in monatin formation assays, it is expected that any D-aminotransferase containing the consensus sequences described herein would also be active, although their primary sequence identity is as low as 47%. There has been no evidence before this work that these unique D-aminotransferases, with low homology to the more characterized Bacillus D-aminotransferase, would have activity for monatin or would be broad specificity enzymes.
DNA Sequence CaDAT (ACCESSION AE001437 AE007513-AE007868; VERSION AE001437.1 GI:25168256; nucleotides 914049 . . . 914891)








(SEQ ID NO: 1063)










1
atgaaagatt taggatatta caatggagaa tacgacttaa ttgaaaatat gaaaatacca



 


61
atgaatgatc gtgtatgcta ttttggtgat ggtgtttatg atgctactta tagtagaaac


 


121
cataatatat ttgcactaga tgagcatatt gaccgatttt ataatagtgc cgagctttta


 


181
agaattaaaa ttccatatac aaagaaggaa atgaaagagc ttttaaagga tatggttaaa


 


241
aaggttgata gcggagaaca atttgtatat tggcaggtta ctagaggtac tggcatgcgt


 


301
aatcatgctt ttttgagtga ggatgttaag gctaatattt ggattgtttt aaagccacta


 


361
aaggtaaaag atatgtcaaa aaaattaaaa ctaataacat tagaggatac tagattttta


 


421
cattgtaaca taaaaacctt aaatttgctt cctagtgtaa ttgcagcaca aaaaactgaa


 


481
gaagcaggct gccaggaagc agtatttcat agaggagata gagttactga atgtgctcat


 


541
agtaatgttt caattataaa ggatgagatt ttaaaaactg cgccaacaga taatcttatt


 


601
ttgccgggaa tagcaagggc gcatcttata aaaatgtgca aaaaatttga gatacctgta


 


661
gatgaaactc catttacatt aaaggagtta attaatgcgg atgaagttat agttacaagt


 


721
tcagggcaat tttgtatgac tgcttgtgag atagatggaa gacctgtagg cggaaaagcg


 


781
ccagatatta ttaaaaagct tcagactgcc ttacttaatg aatttttgga agaaacaaat


 


841
taa






Protein Sequence CaDAT (ACCESSION NP_347428; VERSION NP_347428.1 GI:15894079)









(SEQ ID NO: 1064)










1
MKDLGYYNGE YDLIENMKIP MNDRVCYFGD GVYDATYSRN HNIFALDEHI DRFYNSAELL



 


61
RIKIPYTKKE MKELLKDMVK KVDSGEQFVY WQVTRGTGMR NHAFLSEDVK ANIWIVLKPL


 


121
KVKDMSKKLK LITLEDTRFL HCNIKTLNLL PSVIAAQKTE EAGCQEAVFH RGDRVTECAH


 


181
SNVSIIKDEI LKTAPTDNLI LPGIARAHLI KMCKKFEIPV DETPFTLKEL INADEVIVTS


 


241
SGQFCMTACE IDGRPVGGKA PDIIKKLQTA LLNEFLEETN 






DNA Sequence CbDAT (ACCESSION CP000721 AALO01000000 AALO01000001-AALO01000089 VERSION CP000721.1 GI:149901357; nucleotides 3213484 . . . 3212636)









(SEQ ID NO: 1065)










1
atggagaatt taggttatta taatggaaag tttggattat tagaggaaat gacagtacca



 


61
atgcttgatc gtgtttgcta ttttggagat ggagtttatg atgctactta tagcagaaat


 


121
cacaagattt ttgcattgga ggagcatatt gaaagatttt acaacagcgc tggtttatta


 


181
ggaattaaaa ttccttattc aaaggagcaa gtaaaagaaa tccttaagga gatggtatta


 


241
aaggttgatt caggagaaca atttgtatat tggcaaatta ctagaggaac tggaatgaga


 


301
aatcatgctt ttcctggaga tgaggtccct gcaaatctat ggattatgtt aaagccttta


 


361
aatattaagg atatgtcaca aaaattaaag ttaatcactt tagaagacac tagattttta


 


421
cactgtaata tcaaaacctt aaatttatta ccaagtgtaa ttgcatctca aaaaactgaa


 


481
gaggcaggat gtcaggaagc tgtatttcat agaggggata gagtaactga atgtgcacat


 


541
agcaatgtat caattattaa ggatggtata ttaaaaactg ctccaacaga caatttaatt


 


601
ttaccaggta tagcaagagc tcaccttatt aaaatgtgta aatcctttaa tattcctgta


 


661
gatgaaacag catttacctt gaaggaatta atggaggcag atgaagttat agttactagt


 


721
tcaggtcaat tttgtatggc aaccagtgaa atagatggaa tacctgtagg gggaaaagca


 


781
ccagagcttg taaagaaatt acaagatgca ttgttaaatg agttcttaga agaaacaaaa


 


841
acagaatag 






Protein Sequence CbDAT (ACCESSION YP_001309869 VERSION YP_001309869.1 GI:150017615)









(SEQ ID NO: 1066)










1
MENLGYYNGK FGLLEEMTVP MLDRVCYFGD GVYDATYSRN HKIFALEEHI ERFYNSAGLL



 


61
GIKIPYSKEQ VKEILKEMVL KVDSGEQFVY WQITRGTGMR NHAFPGDEVP ANLWIMLKPL


 


121
NIKDMSQKLK LITLEDTRFL HCNIKTLNLL PSVIASQKTE EAGCQEAVFH RGDRVTECAH


 


181
SNVSIIKDGI LKTAPTDNLI LPGIARAHLI KMCKSFNIPV DETAFTLKEL MEADEVIVTS


 


241
SGQFCMATSE IDGIPVGGKA PELVKKLQDA LLNEFLEETK TE 






DNA Sequence LsDAT (ACCESSION CP000233 VERSION CP000233.1 GI:90820184; nucleotides 1750082 . . . 1750927)









(SEQID NO: 1067)










1
atgaagcaag ttggatacta caatggtact atcgctgatt taaatgaact taaggtgcct



 


61
gctactgatc gtgcacttta ttttggtgat ggttgctacg atgcaactac atttaagaac


 


121
aatgttgcat ttgccttaga agatcatctt gatcgttttt ataatagttg tcgcctacta


 


181
gagatcgatt tccctttaaa tcgcgatgaa cttaaagaaa agctttacgc tgttattgat


 


241
gctaacgaag ttgatactgg tatcctttat tggcaaactt cacgtggttc tggtttacgt


 


301
aaccatattt tcccagaaga tagccaacct aatttattaa tttttactgc tccttatggt


 


361
ttagttccat ttgatactga atataaactt atatctcgcg aagacactcg cttcttacat


 


421
tgcaatatta aaactttgaa tttacttcca aacgttattg caagtcaaaa ggctaatgaa


 


481
agtcattgcc aagaagtggt cttccatcgc ggtgacagag ttacagaatg tgcacactct


 


541
aacatcttaa ttctaaaaga tggcgttctt tgctccccac ctagagataa tttaatcttg


 


601
ccaggaatta ctttgaaaca tctcttgcaa ttagcaaaag aaaataatat tcctacttcc


 


661
gaagcaccat tcactatgga tgatcttaga aatgctgatg aagttattgt tagttcttca


 


721
gcttgtctag gtattcgcgc agtcgagctt gatggtcagc ctgttggtgg aaaagatgga


 


781
aagactttaa agatcttgca agatgcttat gctaagaaat ataatgctga aactgtaagt


 


841
cgttaa 






Protein Sequence LsDAT (ACCESSION YP_536555 VERSION YP_536555.1 GI:90962639)









(SEQ ID NO: 1068)










1
MKQVGYYNGT IADLNELKVP ATDRALYFGD GCYDATTFKN NVAFALEDHL DRFYNSCRLL



 


61
EIDFPLNRDE LKEKLYAVID ANEVDTGILY WQTSRGSGLR NHIFPEDSQP NLLIFTAPYG


 


121
LVPFDTEYKL ISREDTRFLH CNIKTLNLLP NVIASQKANE SHCQEVVFHR GDRVTECAHS


 


181
NILILKDGVL CSPPRDNLIL PGITLKHLLQ LAKENNIPTS EAPFTMDDLR NADEVIVSSS


 


241
ACLGIRAVEL DGQPVGGKDG KTLKILQDAY AKKYNAETVS R 






Example 10
Analysis of DATs
HMS174 E. coli containing the DAT nucleic acids having the sequence of SEQ ID NO:865, 867, 869, 871, 873, 875, and 877 in vector pSE420-cHis were obtained and streaked on agar plates containing LB medium with ampicillin. One skilled in the art can synthesize the genes encoding these D-aminotransferases using assembly PCR techniques such as those described in Example 4. Single colonies were used to inoculate 3 mL of LB medium containing ampicillin (100 μg/mL). Five hundred μl of the overnight culture was used to inoculate 50 mL of the same medium in 250 mL baffled flasks. The cells were grown at 30° C. to approximately an OD600nm of 0.5. IPTG was added to a final concentration of 1 mM. Cells were induced at 30° C. for 4 hours and collected by centrifugation.
Cell extracts were prepared as described in Example 4. Total protein and DAT concentrations were determined as described in Example 4. The DATs all appeared to express well, and most of them showed a high degree of solubility.
A monatin formation assay was done as described in Example 5 except with a DAT concentration of 0.1 mg/mL and the aldolase at a concentration of 10 μg/mL. As a control, 0.1 mg/mL of purified B. sphaericus DAT was assayed. After 6 and 22 hours, an aliquot was taken and formic acid added to a final concentration of 2%, and the samples were frozen. Samples were then thawed, spun and filtered. Samples were analyzed for monatin concentrations using the LC/MS/MS methodology described in Example 3. Under the conditions tested, SEQ ID NO:870, 874 and 878 all appeared to have high activity in the 3-step monatin formation assay. DAT polypeptides having the sequences shown in SEQ ID NOs:866, 872, and 876 also had activity in the monatin formation pathway but not to the same extent as did polypeptides having the sequence shown in SEQ ID NOs:870, 874 and 878 under the conditions tested. Table 17 shows the results for monatin formation (in ppm).







TABLE 17







Monatin formation assay









DAT polypeptide (SEQ ID NO:)
6 hr
22 hr












866
17.4
76


868
nd
nd


870
132
836


872
13.8
50


874
281.6
798


876
2.4
12


878
223.4
576


B. sphaericus DAT
175.6
616





nd, not detected under conditions tested






Further Analysis of Polypeptides Having the Sequence of SEQ ID NO:870, 874 and 878 in pET30a

Cultures of E. coli BL21 DE3 transformed with pET30a plasmids containing nucleic acids encoding the above-indicated DATs were grown overnight in 50 mL of Overnight Express II (Solution 1-6, Novagen) at 30° C. As a positive control, a strain containing the DAT from ATCC #4978 in pET30a was also grown and induced (described in Example 6). Cells were collected at an OD600nm of 5-10, harvested by centrifugation and frozen at −80° C. until further processed.
Cell extracts were prepared as described in the Example 4. Total protein and DAT concentrations were determined as described in Example 4.
A monatin formation assay was done as described in Example 5 except with a DAT polypeptide concentration of 0.5 mg/mL for SEQ ID NO:870 and a concentration of 0.275 mg/mL for each of SEQ ID NO:874 and 878. As a control, DAT4978 and purified B. sphaericus DAT were assayed at 0.5 mg/mL concentration. After 0.5, 1, 2, 4, 6.5, 9, 24 and 22 hr, an aliquot was taken and formic acid added to a final concentration of 2% and the samples were frozen. Samples were then thawed, spun and filtered. Samples were analyzed for monatin using the LC/MS/MS methodology described in Example 3. The results are shown in Table 18 (in ppm of monatin formed).














TABLE 18





DAT polypeptide 









(SEQ ID NO:)
0.5 hr 
1 hr
2 hr
4 hr
6.5 hr
9 hr
24 hr






















4978 DAT
18
85.6
283.4
673.2 
890
1226
2020


870
14.4
71
279.4
736
1340
1680
3362


874
63.8
182.6 
415.6
674
888
938
1154


878
97.8 
244.4
607
912.2 
1068
1174
1356


B. sphaericus
44.6 
142.8 
375.2
813
1294
1382
2746









All three of the subcloned DATs (encoding polypeptides having the sequence of SEQ ID NO:870, 874, and 878) expressed well in the pET system and yielded soluble protein. The polypeptide having the sequence shown in SEQ ID NO:870 gave the highest amount of expression in the soluble fraction and exhibited high activity that did not appear to diminish over time in comparison to the DAT polypeptides having the sequence of SEQ ID NO:874 and 878.
Comparison Between Wild Type and Mutant DAT Polypeptides
A mutant polypeptide in which the residue of SEQ ID NO:870 was changed from a T to a N (SEQ ID NO:870 T242N) was constructed as described in Example 4 and expressed and compared to DAT4978, DAT4978 T243N (described in Example 6), B. sphaericus and wildtype SEQ ID NO:870.
Cultures of BL21 DE3 in which the wild type and mutant polypeptides having the sequence of SEQ ID NO:870, 870 T242N, DAT4978 and DAT4978 T243N were expressed from the pET30a vector, were grown in 50 mL of Overnight Express (Novagen) in a 250 mL baffled flask overnight at 30° C. and 250 rpm. The cells were collected by centrifugation when they reached an optical density at 600 nm of over 10. Cell extracts were prepared as described in Example 4, and total protein and DAT concentrations were determined as described in Example 4. All of the DATs tested were highly expressed and soluble, all near 30% as determined using the Experion software. The polypeptide having the sequence of SEQ ID NO:870 T242N had the highest expression, which was predicted to be 36.3% of the total soluble protein.
A monatin formation assay was done as described in Example 5 at a DAT polypeptide concentration of 0.5 mg/mL. As a control, 0.5 mg/mL of purified B. sphaericus DAT was assayed. After 0.5, 1 2, 4, 6.5, 9 and 23.25 hr, an aliquot was taken, formic acid added to the aliquot to a final concentration of 2% and the samples frozen. Samples were then thawed, spun and filtered. Samples were analyzed for monatin, tryptophan, alanine and 4-hydroxy-4-methyl glutamic acid (HMG) as described in Example 3.
In the last time point, an additional aliquot was taken to determine % R,R monatin by the FDAA-derivatization method described in Example 3.
Monatin formation numbers (ppm) are presented in Table 19 below. The percent R,R is given in the right-hand column, for the 23.25 hr timepoint.















TABLE 19





DAT 










polypeptide
0.5 
1 
2 
4 
6.5 
9 
23.25 
%


(SEQ ID NO:)
hr
hr
hr 
hr
hr
hr
hr
R,R























Wild type 
11
57
216
472
694
942
1616
95.0


DAT 4978










4978 T243N
74
237 
542.6
1106 
1396
1784
2202 
99.0


870
15.6 
74.4
269.6
702
1250
1522
2788
97.8


870 T242N
49.4
194
655.2
1496 
2212
2666
3670 
99.5


B. sphaericus
40.6 
144 
372
800
1090
1458
2434
97.2









The activity of the T242N mutant of the SEQ ID NO:870 polypeptide was very high, and was better than the positive controls and higher than the wildtype form of DAT polypeptides. The percentage of R,R monatin formed by this mutant was also higher than any of the other benchmark enzymes. The analysis of the amount of HMG (a by-product) formed is qualitative, but it appears that, at the 9 hour and 23.25 hour timepoints, similar amounts of HMG were formed by DAT 4978 T243N polypeptides and SEQ ID NO:870 T242N polypeptides.
The exemplary DAT polypeptide of this invention having the sequence shown in SEQ ID NO:870 is a novel protein, exhibiting 76% sequence identity to the closest known D-aminotransferase (Bacillus YM-1 D-aminotransferase) and 69% amino acid sequence identity to the B. sphaericus DAT described in Example 6. FIG. 6 shows an alignment of this novel enzyme of the invention with other published DATS, and one can see the residues are one property that makes this enzyme unique and may account for its superior activity.
The highly active DAT polypeptide having the sequence shown in SEQ ID NO:910 (more similar to B. sphaericus type DATs; see Example 12) is also shown in the alignment. As an example of the uniqueness of the SEQ ID NO:870 polypeptide, in the region surrounding amino acid residue 54-55 (B. sphaericus numbering) in the alignment of FIG. 6, it is clear that the Bacillus-like DATs have a high degree of conservation whereas SEQ ID NO:870 has the residues EC rather than AS. As another example, in the highly conserved region surrounding residue 135 of the alignment shown in FIG. 6, the SEQ ID NO:870 polypeptide has a more hydrophilic residue (T) versus predominantly valine residues. The core sequence that represents the SEQ ID NO:870 enzyme, but excludes previously known broad specificity D-aminotransferases and highly related homologs, is shown as Consensus Sequences A and B. It is expected that any polypeptide containing one of these consensus sequences would exhibit DAT activity and be active in monatin formation pathway steps.
Consensus Sequence A








(SEQ ID NO: 1069)



Y.*LWND.*IV.*EDRGYQFGDG.*YEV.*KVY.*G.*FT.*EH.*DR.*YECAEKI.*PYTK.*H.*L



 


LH.*L.*E.*N.*TG.*YFQ.*TRGVA.*RVHNFPAGN.*Q.*V.*SGT.*K*F.*R.*N.*KGVKAT.*


 


TED.*RWLRCDIKSLNLLGAVLAKQEAIEKGCYEA.*LHR.*G.*TE.*SS.*N.*GIK.*GTLYTHPA.*


 


N.*ILRGITR.*V.*TCAKEIE.*PV.*Q.*T.*K.*LEMDE.*V.*S.*SE.*TP.*I.*DG.*KI.*N


 


G.*G.*WTR.*LQ.*F.*K.*P.






Consensus Sequence B








(SEQ ID NO: 1070)



Y[ST]LWND[QK]IV.[DE].{2}[VI].[IV].{2}EDRGYQFGDG[IV]YEV[IV]KVY[ND]G.[ML]F



 


T.{2}EH[IV]DR.YECAEKI[RK][LIV].[IV]PYTK.{3}H[QK]LLH.L[VI]E.N.[LV].TG[HN]


 


[IVL]YFQ[IV]TRGVA.RVHNFPAGN[VI]Q.V[LI]SGT.K.F.R.{3}N.[EQ]KGVKAT.TED[IV]RWL


 


RCDIKSLNLLGAVLAKQEAIEKGCYEA[IV]LHR.G.[VI]TE.SS.N[VI][FY]GIK[DN]GTLYT


 


HPA[ND]N.ILRGITR.V[IV][LI]TCAKEIE[LMI]PV.[EQ]Q.{2}T.K.{2}LEMDE[LIVM].V[ST]


 


S.[TS]SE[IV]TP[VI]I[DE][IVL]DG.KI.NG.{2}G[ED]WTR[KQ]LQ.{2}F.{2}K[IL]P.






Similar to PERL regular expression convention language, “.*” indicates that any number of amino acid residues may be present from any of the 20 proteinogenic amino acids; [ ] indicates that any one of the amino acids in the brackets can be present; “.{#}” indicates that any of the 20 proteinogenic amino acids can be present as long as the number of residues matches the number {#} indicated in the brackets.
With respect to the use of “.*” in Consensus sequence A, the number of amino acids at any of the “.*” positions can vary, for example, from 0 to about 20 residues (see, for example, Consensus sequence B (SEQ ID NO:1070)) or from about 20 residues up to about 100 residues, or the number of amino acids can be much larger, for example, up to 1000 or more residues. Without limitation, an insertion at one or more of the “.*” positions can correspond to, for example, a domain such as (but not limited to) a chitinase binding domain (e.g., from Pyrococcus furiosus (Accession No. 2CZN_A) or P. burkholderia (Accession No. YP_331531) or a cellulose binding domain (e.g., from Cellulomonas fimi (Accession No. 1EXH_A) or Clostridium stercorarium (Accession No. 1UY1_A). In some embodiments (without limitation), five or less of the positions designated “.*” each contain an insertion of, for example, greater than about 20 residues (e.g., greater than about 100 residues). In other embodiments (without limitation), five or more of the positions designated “.*” each contains an insertion of less than about 100 residues (e.g., less than about 20 residues, e.g., 3, 5, 10, 20, 25, 30, 40, 50, 60, 70, 75, 80, 90 or 95 residues)). The activity of a polypeptide having a sequence that corresponds to one or more of the consensus sequences disclosed herein and containing any number of residues inserted at one or more of the “.*” positions can be evaluated using methods that are described herein.
Non-limiting representative polypeptides that contain the consensus sequence shown in SEQ ID NO:1069 include the polypeptide having the sequence shown in SEQ ID NO:870 and Consensus sequence B (SEQ ID NO:1070).
Comparison Between SEQ ID NO:870, 870 T242N, DAT 4978 and DAT 4978 T243N, Tagged and Untagged
E. coli BL21 DE3 cells expressing the polypeptides having the sequence of SEQ ID NO:870, 870 T242N, DAT 4978 and DAT 4978 T243N were grown in 50 mL of Overnight Express (Novagen) in a 250 mL baffled flask overnight at 30° C. and 250 rpm. The cells were collected by centrifugation when the optical density at 600 nm was greater than 10. Cell extracts were prepared as described in Example 4. Total protein and DAT concentrations were determined as described in Example 4.
E. coli BL21 DE3 cultures expressing C-terminal tagged SEQ ID NO:870, 870 T242N, DAT 4978 and DAT 4978 T243N polypeptides were grown in 200 mL of Overnight Express (Novagen) in a 1000 mL baffled flask overnight at 30° C. and 250 rpm. Two cultures of each clone were grown. The cells were pooled and collected by centrifugation when at an optical density at 600 nm of over 10. Cell extracts were created by the addition of 50 mL of Bug Buster Primary Amine Free (Novagen) with 50 μl of Benzonase Nuclease (Novagen), 0.75 μl of rLysozyme (Novagen), and 250 μl of Protease Inhibitor Cocktail II (Calbiochem). The cells were incubated for 15 minutes at room temperature with gentle rocking. The extracts were centrifuged at 45,000×g for 10 minutes.
The His-tagged proteins were purified as described in the methods section using GE Healthcare (Piscataway, N.J.) Chelating SepharoseTM Fast Flow resin. The purified protein was desalted using a PD10 column into 100 mM potassium phosphate, pH 7.8 (for DAT 4978 and DAT 4978 T243N polypeptides) or 100 mM EPPS pH 8.2 (for SEQ ID NO:870 and 870 T242N polypeptides), both buffers contained 50 μM PLP.
An R,R monatin formation assay was performed as described in Example 5 with a DAT concentration of 0.5 mg/mL. Aliquots were taken at 2.25, 4.5, 9 and 24 hours, pH adjusted with formic acid, and frozen. An extra aliquot was taken at the final time point without formic acid addition for determination of stereoisomeric distribution using the FDAA derivatization method described in Example 3. The samples were thawed and centrifuged for 5 minutes and the supernatant filtered with a 0.2 μm nylon membrane filter. Samples were submitted for monatin analysis using the LC/MS/MS method described in Example 3. The results are shown in Table 20, in ppm monatin formed. The far right column is the % R,R monatin formed at the end of the experiment.












TABLE 20





DAT polypeptide (SEQ ID NO:)
2.25 hr
4.5 hr
9 hr
24 hr
% R,R




















DAT 4978
330
676
1470
2384
92.3


DAT 4978 T243N
1392
2856
4068
3688
98.2


870
395
952
1896
2998
97.8


870 T242N
1416
2936
3868
3976
99.3


DAT 4978 6xHis tagged
362
887
1664
2818
96.5


DAT 4978 T243N 6xHis tagged
1364
2298
3464
4440
98.9


870 6xHis tagged
228
688
1508
3138
98.1


870 T242N 6xHis tagged
746
2020
3962
4552
99.5









The overall activity and stereospecificity of the C-terminally tagged and untagged enzymes are very similar. In addition, it is expected that the presence of activity in a polypeptide encoded from a subcloned nucleic acid is predictive of the presence of activity in the corresponding polypeptide encoded from the full-length or wild type nucleic acid.
Example 11
Analysis of DATs
E. coli HMS 174 containing DAT nucleic acids in the pSE420-cHis vector encoding the polypeptides having the sequence of SEQ ID NO:880, 882, and 884 were streaked onto agar plates containing LB medium with ampicillin One skilled in the art can synthesize the genes encoding these D-aminotransferases using assembly PCR techniques such as those described in Example 4. Single colonies were used to innoculate 3 mL of LB medium containing ampicillin (100 μg/mL). Five hundred μl was used to inoculate 50 mL of the same medium in a 250 baffled flask. The cells were grown at 30° C. to approximately an OD600nm of 0.4, and IPTG was added to a final concentration of 1 mM. Cells were grown at 30° C. for 4 hours and collected by centrifugation.
Cell extracts were prepared as described in the Example 4. Total protein and DAT polypeptide concentrations were determined as described in Example 4. SEQ ID NO:882 and 884 expressed well and were present at high levels in the soluble fraction.
An R,R monatin formation assay was performed as described in Example 5 using approximately 0.5 mg/mL of each DAT polypeptide (except that 0.35 mg/mL of the SEQ ID NO:880 polypeptide was utilized). After 2, 8, and 23 hours, an aliquot was taken, formic acid was added to a final concentration of 2%, and the samples were frozen. Samples were then thawed, spun and filtered. Samples were analyzed for monatin using the LC/MS/MS methodology described in Example 3. Results are shown in Table 21.
At the last time point, an extra aliquot was taken (without pH adjustment) to determine the stereoisomeric distribution of the monatin produced using the FDAA derivatization methodology described in Example 3. The percentage of R,R produced is shown in the right hand column of Table 18 below, the balance is predominantly S,R monatin.











TABLE 21





Polypeptide
monatin ppm
monatin ppm
monatin ppm
% R,R


(SEQ ID NO:)
(2 hr)
(8 hr)
(23 hr)
(23 hr)



















880
31.6
140
176
97.5


882
31.6
872
2790
99.3


884
79.4
644
1610
100


B. sphaericus
337
1518
2538
96.7









Polypeptides having the sequence shown in SEQ ID NO:882 and 884 exhibited good activity in the monatin formation reactions from D-tryptophan.
The stereopurity of the monatin produced was higher when using these DATs as compared to the B. sphaericus control enzyme. The DAT nucleic acids encoding DAT polypeptides having the sequence of SEQ ID NO:882 and 884 were subcloned into pET30a vectors as described in Example 4.
Analysis of DAT Polypeptides Having the Sequence of SEQ ID NO:882 and 884 Expressed from the pET30a Vector
Cultures of E. coli BL21 DE3 containing nucleic acids encoding DAT polypeptides having the sequence of SEQ ID NO:882 and 884 in the pET30a vector were grown in 50 mL of Overnight Express (Novagen) in a 250 mL baffled flask overnight at 30° C. and 250 rpm. The cells were collected by centrifugation when the optical density at 600 nm was greater than 10.
Cell extracts were prepared as described in Example 4. Total protein and DAT polypeptide concentrations were determined as described. Total and soluble protein samples were analyzed using a 4-15% gradient acrylamide gel as well as by the Experion system. Expression was predicted to be approximately 30% by the Experion software. Visible bands were seen for both the total protein and soluble protein (cell-free extract) fractions.
A monatin formation assay was performed as described in Example 5 with both 0.5 and 2 mg/mL DAT polypeptide concentrations. Purified B. sphaericus DAT was used as a control. After 2, 4.5, 9, 24, 36 and 48 hrs, an aliquot was taken, formic acid was added to a final concentration of 2%, and the samples were frozen. Samples were then thawed, spun and filtered. Samples were analyzed for monatin using the LC/MS/MS methodology described in Example 3. The samples were qualitatively analyzed for HMG levels. Additional aliquots were taken (without pH adjustment) for stereoisomeric analysis using the FDAA derivatization methodology described in Example 3. The results are shown in Tables 22 and 23.













TABLE 22





DAT 
Monatin
Monatin 
Monatin
Monatin
Monatin 
Monatin


polypeptide
(ppm)
(ppm)
(ppm)
(ppm)
(ppm)
(ppm)


(SEQ ID NO:)
2 hrs
4.5 hrs 
9 hrs
24 hrs
36 hrs
48 hrs





















882 
61
274
780
1802
2172
2170


(0.5 mg/mL)








882 
985
2452
3232
3128
3082
3158


(2 mg/mL)








884 
149
362
656
1394
1756
2158


(0.5 mg/mL)








884 
811
1628
2466
2988
3178
2864


(2 mg/mL)








B. sphaericus
362
860
1268
2362
2532
2804


(0.5 mg/mL)








B. sphaericus
1335
2344
3154
3866
3842
4008


(2 mg/mL)
















TABLE 23







Stereopurities of monatin produced at selected timepoints









DAT polypeptide
24 hrs
48 hrs


(SEQ ID NO:)
(% R,R)
(% R,R)





882 (2 mg/mL)
95.4
94.1


884 (2 mg/mL)
99.6
99.4


Bs DAT (2 mg/mL)
95.8
93.3









Polypeptides having the sequence shown in SEQ ID NO:882 and 884 exhibited good monatin formation activity and stereospecifiity, and appeared to produce less HMG than the B. sphaericus control during the initial timepoints. Polypeptides having the sequence of SEQ ID NO:882 exhibited similar initial monatin formation rates but appeared to have plateaued in this experiment at a lower monatin titer.
Example 12
Analysis of DATs in pSE420-cHis, and of a DAT in pET30a
The open reading frames encoding DAT polypeptides having the sequence of SEQ ID NO:898, 900, 902, 904, 906, 910, and 896 were evaluated. One of ordinary skill in the art can synthesize the genes encoding these D-aminotransferases using assembly PCR techniques such as those described in Example 4.
A culture of E. coli BL21 DE3 containing a nucleic acid encoding a DAT polypeptide having the sequence shown in SEQ ID NO:896 in the pET30a vector (subcloned as described in Example 4) was grown in 50 mL of Overnight Express (Novagen) in a 250 mL baffled flask overnight at 30° C. and 250 rpm. The cells were collected by centrifugation when the optical density at 600 nm was greater than 10.
Top10 (Invitrogen, Carlsbad, Calif.) E. coli cells were transformed with the pSE420-cHis plasmid containing the DAT nucleic acids having the sequence shown in SEQ ID NO:897, 899, 901, 903, 905, and 909 and plated on LB medium containing ampicillin (100 μg/mL). Five hundred μl of an overnight culture was used to inoculate 50 mL of the same medium in a 250 baffled flask. The cells were grown at 30° C. to an OD600nm of approximately 0.4 and IPTG was added to a final concentration of 1 mM. Cells were grown at 30° C. for 4 hours and collected by centrifugation.
Cell extracts were prepared as described in Example 4. Soluble protein and estimated DAT concentrations were determined as described in Example 4.
An R,R monatin formation assay was performed as described in Example 5 with DAT polypeptide concentrations of 0.5 mg/mL, except that 0.3 mg/mL of the polypeptide having the sequence of SEQ ID NO:896 was used; 0.06 mg/mL of the polypeptide having the sequence of SEQ ID NO:898 was used; 0.4 mg/mL of the polypeptide having the sequence shown in SEQ ID NO:900 was used; 0.1 mg/mL of the polypeptide having the sequence of SEQ ID NO:902 was used; and 0.12 mg/mL of the polypeptide having the sequence of SEQ ID NO:904 was used. As positive controls, SEQ ID NO:870, 870 T242N, and purified B. sphaericus were tested at DAT polypeptide concentrations of 0.5 mg/mL. After 2, 6, and 24 hours, an aliquot was taken, formic acid was added to a final concentration of 2% and the samples were frozen. Samples were then thawed, spun and filtered. Samples were analyzed for monatin using the LC/MS/MS methodology described in Example 3. Additional aliquots were taken for stereoisomeric distribution analysis and were not treated with formic acid. The results for the 24 hour time point are shown in Table 24. The DAT nucleic acid encoding the DAT polypeptide having the sequence shown in SEQ ID NO:908 was not subcloned and could not be assayed.











TABLE 24





Polypeptide
monatin
monatin
monatin
24 hr


(SEQ ID NO:)
2 hrs (ppm)
6 hrs (ppm)
24 hrs (ppm)
% R,R



















B. sphaericus
261
1203
2604
95.6


870
193
1067
2490
96.8


870 T242N
813
2230
3380
98.8


896
 30
127
286
99.8


898
nd
3
15
95.7


900
 4
16
56
92.9


902
144
411
1209
96.7


904
nd
1
4
92.3


906
 14
18
25
98


910
487
1154
2770
94.5





nd = not detectable under conditions tested






DAT polypeptides having the sequence shown in SEQ ID NO:910 and 902 had high levels of activity for the monatin formation reactions, and produced fairly high levels of R,R monatin. Results indicated that the DAT polypeptide having the sequence shown in SEQ ID NO:870 exhibited comparable activity to that of the wildtype polypeptide having the sequence shown in SEQ ID NO:910 under the conditions tested; however, the T242N mutation in the SEQ ID NO:870 polypeptide makes a large improvement in activity and stereospecificity of the enzyme.
Example 13
Analysis of DATs
Plasmids (pSE420-cHis) containing the nucleic acid sequences encoding SEQ ID NO:912, 914, 916, 918, 920, 922, 924, and 926 DATs were obtained. One skilled in the art could clone the genes using any number of gene assembly protocols such as the one described in Example 4.
E. coli Top10 (Invitrogen) cells were transformed with the pSE420-cHis plasmids containing DAT polypeptides having the sequence of SEQ ID NO:912, 914, 916, 918, 920, 922, 924, and 926 and plated on LB medium containing ampicillin (100 μg/mL). Five hundred μl of the overnight culture was used to inoculate 50 mL of the same medium into 250 mL baffled flasks. Cultures were grown at 30° C. to an OD600nm of approximately 0.4. IPTG was added to a final concentration of 1 mM. Cells were grown at 30° C. for 4 hours and collected by centrifugation.
Cell extracts were prepared as described in Example 4. Total soluble protein and DAT protein concentrations were determined as described in Example 4. Most of the DAT polypeptides that were expressed were soluble except for the SEQ ID NO:916 polypeptide, which was only partially soluble.
An R,R monatin formation assay was performed as described in Example 5, with a DAT polypeptide concentration targeted to about 0.25 mg/mL; except that 0.1 mg/mL of the SEQ ID NO:922 polypeptide was used and 0.2 mg/mL of the SEQ ID NO:926 polypeptide was used. As a positive control, purified B. sphaericus DAT was tested at a 0.25 mg/mL concentration. After 2, 8 and 24 hours, an aliquot was taken and formic acid was added to a final concentration of 2%, and the samples were frozen. Samples were then thawed, spun and filtered. Samples were analyzed for monatin using the LC/MS/MS methodology described in Example 3. The results are shown in Table 25.










TABLE 25





Polypeptides
monatin (ppm)
monatin (ppm)
monatin (ppm)


(SEQ ID NO:)
2 hours
8 hours
24 hours


















B. sphaericus
179
774
1482


912
0.2
2
2


914
4
22
62


916
0.6
2
6


918
158.8
402
496


920
5
40
96


922
0.2
2
2


924
nd
nd
nd


926
1.2
12
30





nd = not detected under conditions assayed






DAT nucleic acids having the sequence shown in SEQ ID NO:169, 171, 167, 173 and 175 (encoding DAT polypeptides having the sequence shown in SEQ ID NO:170, 172, 168, 174 and 176) were obtained as PCR products and were subcloned in pET30a as described in Example 4. One of ordinary skill in the art could reconstruct the genes using any number of gene assembly methods such as the one described in Example 4.
E. coli BL21 DE3 cells containing DAT nucleic acids having the sequence of SEQ ID NO:169, 171, 167, 173 and 175 in the pET30a vector were grown in 50 mL of Overnight Express (Novagen) in a 250 mL baffled flask, overnight at 30° C. and 250 rpm. The cells were collected by centrifugation when the optical density at 600 nm was greater than 10.
Cell extracts were prepared as described in the Example 4. Total soluble protein and DAT protein concentrations were determined as described in Example 4. The polypeptide having the sequence of SEQ ID NO:170 (encoded by the DAT nucleic acid having the sequence of SEQ ID NO:169) did not appear to be soluble, which may have impeded activity assays.
An R,R monatin formation assay was performed as described in Example 5 using a DAT polypeptide concentration of 0.5 mg/mL, except that 0.25 mg/mL of the SEQ ID NO:170 polypeptide was used. As a positive control, purified B. sphaericus DAT was tested at a 0.5 mg/mL concentration. After 2, 8 and 24 hours, an aliquot was taken, formic acid was added to a final concentration of 2%, and the samples were frozen. Samples were then thawed, spun and filtered, and analyzed for monatin using the LC/MS/MS methodology described in Example 3. Results are shown in Table 26.










TABLE 26





Polypeptides
monatin (ppm)
monatin (ppm)
monatin (ppm)


(SEQ ID NO:)
2 hr
8 hr
24 hr


















B. sphaericus
456
1502
2970


170
2
8
14


172
5
20
60


168
15
68
186


174
1
4
8


176
451
1508
2744









Samples (without pH adjustment) were analyzed to determine % R,R using the FDAA derivatization protocol described in Example 3. The monatin produced by DAT polypeptide having the sequence shown in SEQ ID NO:176 was 99.6% R,R after 24 hrs compared to that produced by B. sphaericus, which was 95.2% R,R at the same timepoint. The activity and stereopurity resulting from the DAT polypeptide having the sequence of SEQ ID NO:176 were both quite high, and the corresponding nucleic acid was subcloned as a C-terminal tagged protein as described in Example 4 for more quantitative studies.
Characterization of SEQ ID NO:176 C-His-Tagged Protein
The nucleic acid having SEQ ID NO:175, which encodes the polypeptide having the sequence of SEQ ID NO:176, was cloned into pET30a without a stop codon so that it could be expressed as a fusion protein with a 6×His-tag on the C-terminus. The protein was purified using the His-bind resin described in Example 4. When the fusion protein was eluted from the PD-10 desalting column, a yellow precipitate formed in the solution. A yellow residue was also observed on the column. The yellow color usually is indicative of the presence of a PLP-binding protein. In an effort to prevent the precipitation of the PLP-binding protein at the desalting step, different buffers (100 mM phosphate and 100 mM EPPS with or without 10% glycerol) at two pH values (7.8 and 8.2) were utilized. None of the buffers tried appeared to completely prevent the precipitation.
The monatin assay was performed using a well-mixed heterogeneous protein solution and a DAT polypeptide concentration of 0.5 mg/mL. The results are shown in Table 27. The purified SEQ ID NO:176 DAT polypeptide (C-tagged) showed comparable activity to the positive control DAT polypeptide from B. sphaericus; however, the activity appeared to be lower than the activity exhibited by the mutant polypeptides having the sequence of SEQ ID NO:870 T242N or SEQ ID NO:870 T242N.







TABLE 27







Monatin Production (ppm)













Polypeptide (SEQ ID NO:)
2 hr
4 hr
8 hr
24 hr

















B. sphaericus
262
676
1044
2150



870
332
678
1346
2826



870 T242N
942
1938
2834
4004



176
208
392
732
1806










Example 14
Evaluation of DATs
The open reading frames encoding 29 DATs were obtained as PCR products. It is noted that one of ordinary skill in the art can synthesize the genes encoding the DATs using assembly techniques such as those described in Example 4. The DAT nucleic acids were subcloned into the pET30a vector and expressed as untagged proteins as described in Example 4. The desalted cell-free extracts (prepared as described in Example 4) were used in monatin formation assays. A DAT polypeptide concentration of 0.5 mg/mL was used for the monatin assay except for the following polypeptides (amounts used in parentheses): the SEQ ID NO:156 polypeptide (0.4 mg/mL), the SEQ ID NO:182 polypeptide (0.45 mg/mL), the SEQ ID NO:240 polypeptide (0.47 mg/mL), and the SEQ ID NO:204 polypeptide (0.42 mg/mL).
Most of the DAT polypeptides showed undectectable to low monatin production under the conditions assayed as compared to positive control enzymes. Most of the expressed DAT polypeptides were soluble as determined by the Experion; however, the polypeptides having SEQ ID NO:204 and 240 were expressed at very low levels and may not have been very soluble. On the other hand, the polypeptide having SEQ ID NO:220 was predicted to be 68% of the total soluble protein as judged by the Experion software.
The monatin production results are shown in Table 28 and 29. At 24 h, the DAT polypeptide having SEQ ID NO:156 and 214 produced 40-50% of monatin as compared to the positive control enzyme, the DAT from B. sphaericus. The most active DAT polypeptide was the SEQ ID NO:220 polypeptide. Approximately 4 h after the reaction was started, the monatin concentration reached a maximum. It is expected that the mature protein of SEQ ID NO:156 (without the predicted leader sequence) is the active component of the DAT polypeptide and, therefore, the protein can be produced recombinantly with the leader sequence absent.







TABLE 28







Monatin Formed (ppm)











Polypeptide (SEQ ID NO:)
2 hr
4 hr
8 hr
24 hr














178
11
24
62
194


180
nd
nd
nd
nd


154
52
103
166
178


182
nd
nd
nd
nd


218
1.6
2.8
274
12


188
2.4
5.2
10
22


190
3.8
9.4
22
42


208
1
1.2
nd
nd


220
2418
3563
3812
3882


196
1
1.8
nd
8


156
64.8
156
296
796


B. sphaericus
422
791
1302
2124





nd = not detectable under conditions assayed













TABLE 29







Monatin Formed (ppm)











Polypeptide (SEQ ID NO:)
2
4
8
24














166
nd
nd
1
nd


216
69
91
109
134


200
nd
nd
1
1


198
nd
nd
nd
nd


210
1.6
3.8
6.2
15.2


202
3.4
6.2
12.2
29.8


222
3.6
7
12.8
25.8


236
nd
nd
nd
nd


204
nd
nd
nd
3.6


238
10.4
21.8
46.4
115.6


240
3
6
12.4
32.2


224
39.8
85
171.8
268.8


226
2.6
5.8
12.4
30.6


228
4.2
9.8
21.4
66.8


230
9.2
21.8
42.2
94.4


232
3.6
9.4
21.6
57


246
nd
nd
nd
nd


214
160
327
694
1346


B. sphaericus
393
986
1624
2597





nd = not detectable under conditions assayed






The high activity of the SEQ ID NO:220 polypeptide was confirmed in another monatin formation assay where the SEQ ID NO:220 polypeptide was compared to the SEQ ID NO:870, 870 T242N, and B. sphaericus DAT polypeptides. A DAT polypeptide concentration of 0.1 mg/mL and 0.5 mg was used for each of the DAT polypeptides assayed. The results are shown in Table 30. Due to the high degree of activity of the DAT polypeptides assayed, the monatin samples had to be diluted 100-fold to be within the quantitative range of the instruments used (as opposed to a typical 10- or 20-fold dilution).







TABLE 30







Monatin Formed (ppm)











DAT Polypeptide (SEQ ID NO:)
2 hr
4 hr
8 hr
24 hr














B. sphaericus (0.1 mg/mL)
74
170
309
728


B. sphaericus (0.5 mg/mL)
510
921
1068
2704


870 (0.1 mg/mL)
28
81
179
706


870 (0.5 mg/mL)
399
847
1466
2916


870 T242N (0.1 mg/mL)
93.2
245.8
582.4
1270


870 T242N (0.5 mg/mL)
1158.8
2026
3202
4126


220 (0.1 mg/mL)
965.8
1512
2330
3788


220 (0.5 mg/mL)
2950
4302
4618
4488









The percentage of R,R formed by the DAT polypeptide having SEQ ID NO:220 in the above experiments was determined using the FDAA derivatization methodology described in Example 3. The DAT polypeptide having the sequence of SEQ ID NO:220 is highly stereospecific, producing 99.3% R,R monatin at 24 hours as compared to 92.9% R,R for B. sphaericus. In another assay, the SEQ ID NO:220 polypeptide produced 99.8% R,R-monatin.
The exemplary DAT polypeptide of this invention having the sequence of SEQ ID NO:220 is a novel protein that is 62% identical at the protein level to the C. beijerinckii DAT polypeptide shown in Example 9. The SEQ ID NO:220 polypeptide has 86%-90% primary sequence homology (sequence identity) to other highly active DAT polypeptides (e.g., those having the sequence shown in SEQ ID NO:892 and 894 (Example 8), 946 (Example 7) and 176 (Example 13)). These highly active and novel DAT polypeptides were uncharacterized prior to this work, and these enzymes exhibited higher activity and stereospecificity for R,R monatin production reactions than any of the published Bacillus-like D-aminotransferases. FIG. 7 shows an alignment of these related D-aminotransferases and the consensus sequence motifs they have in common are described below.
Consensus Sequence C








(SEQ ID NO: 1071)



M.*GYYNG.*P.*DR.*FGDG.*YDAT.*N.*FAL.*H.*RF.*NS.*LL.*I.*K.*YWQ.*RG.*G.*R.*



 


H.*F.*N.*I.*P.*KLI.*DTRF.*HCNIKTLNL.*P.*VIA.*Q.*E.*C.*E.*VFHRG.*VTECAHSN.*


 


I.*NLIL.*G.*HL.*P.*E.*F.*L.*ADE.*V.*SS.*DG.*GGK.*K.*Q.*T 






Consensus Sequence D








(SEQ ID NO: 1072)



M.{3}GYYNG.{10}P.{2}DR.{3}FGDG.YDAT.{3}N.{3}FAL.{2}H.{2}RF.NS.{2}LL.I.{9}K.



 


{17}YWQ.{2}RG.G.R.H.F.{5,7}N.{2}I.{3}P.{10}KLI.{3}DTRF.HCNIKTLNL.P.VIA.Q.{3}E.


 


{2}C.E.VFHRG.{2}VTECAHSN.{2}I.{11}DNLIL.G.{4}HL.{9}P.{2}E.{2}F.{4}L.{2}ADE.


 


{2}V.SS.{10}DG.{3}GGK.{5}K.{2}Q.{10}T 






Consensus Sequence E








(SEQ ID NO: 1073)



M.*[LV]GYYNG.*[LI].*[ML].*[VI]P.*DR.*[YF]FGDG.*YDAT.*N.*FAL[DE][ED]H[IL][DE]



 


RF.*NS.*LL.*I.*[KR].*[EQ][LMV]K[KE].*[MV].*[DE].*[VL]YWQ.*[TS]RG[TS]G.*R[NS]


 


H.*F.*N[LI].*I.*P.*[IVL].*[KE].*KLI[TS].*[ED]DTRF.*HCNIKTLNL[IL]P[NS]VIA[SA]Q[R


 


K].*E.*C.*E.*VFHRG[ED].*VTECAHSN[VI].*I[IL][KR][ND].*[TS].*DNLIL.*G.*HL[LI][Q


 


K].*[IV]P.*E.*F[TS][LM].*[ED]L.*ADE[VI][LI]V[ST]SS.*[LMI].*[IL]DG.*GGK.*[LVI]K.*


 


[IL]Q.*[EK][FY].*T 






Similar to PERL regular expression convention language (perldoc.perl.org), “.*” indicates that any number of amino acid residues may be present from any of the 20 proteinogenic amino acids; [ ] indicates that any one of the amino acids in the brackets can be present; “.{#}” indicates that any of the 20 proteinogenic amino acids can be present as long as the number of residues matches the number (#) indicated in the brackets.
With respect to the use of “.*” in Consensus sequence C, the number of amino acids at any of the “.*” positions can vary, for example, from about 0 to about 20 residues (see, for example, Consensus sequences D (SEQ ID NO:1072) and E (SEQ ID NO:1073)) or from about 20 residues up to about 100 residues, or the number of amino acids can be much larger, for example, up to 1000 or more residues. Without limitation, an insertion at one or more of the “.*” positions can correspond to, for example, a domain such as (but not limited to) a chitinase binding domain (e.g., from Pyrococcus furiosus (Accession No. 2CZN_A) or P. burkholderia (Accession No. YP_331531) or a cellulose binding domain (e.g., from Cellulomonas fimi (Accession No. 1EXH_A) or Clostridium stercorarium (Accession No. 1UY1_A). In some embodiments (without limitation), five or less of the positions designated “.*” each contain an insertion of, for example, greater than about 20 residues (e.g., greater than about 100 residues). In other embodiments (without limitation), five or more of the positions designated “.*” each contains an insertion of less than about 100 residues (e.g., less than about 20 residues, e.g., 3, 5, 10, 20, 25, 30, 40, 50, 60, 70, 75, 80, 90, or 95 residues). The activity of a polypeptide having a sequence that corresponds to one or more of the consensus sequences disclosed herein and containing any number of residues inserted at one or more of the “.*” positions can be evaluated using methods that are described herein.
Non-limiting representative polypeptides that contain the consensus sequence shown in SEQ ID NO:1071 include SEQ ID NO:220, 892, 894, 176 and 946 and Consensus sequences D (SEQ ID NO:1072) and E (SEQ ID NO:1073)). It is expected that any D-aminotransferase exhibiting any of consensus sequences C, D, or E would be active in monatin formation pathway steps.
Characterization of a c-His-Tagged Polypeptide Having the Sequence of SEQ ID NO:220
The DAT nucleic acid having the sequence of SEQ ID NO:219 (encoding the polypeptide of SEQ ID NO:220) was cloned into pET30a without a stop codon such that it was expressed as a fusion protein with a 6×His-tag on the C-terminus (as described in Example 4). The fusion protein was purified using the His-Bind column (Novagen) described in Example 4. The eluate from the PD-10 desalting column formed a yellow precipitate. Yellow residue was also observed on the column. Monatin assays were done using a well-mixed heterogenous protein solution. Amounts of DAT polypeptide used are indicated in parentheses in the far left column. The notation w/ Trp indicates that the enzyme was incubated with 10 mM D-tryptophan overnight on ice. Results are shown in Table 31.







TABLE 31







Monatin formed (ppm)











Polypeptide (SEQ ID NO:)
2 hr
4 hr
8 hr
24 hr














B. sphaericus (0.5 mg/mL)
382
660
1021
1986


870 T242N (0.1 mg/mL)
69
205
412
1074


870 T242N w/Trp (0.1 mg/mL)
63
163
383
978


870 T242N (0.5 mg/mL)
919
1698
2356
3130


870 T242N w/ Trp (0.5 mg/mL)
772
1519
2294
3023


220 (0.1 mg/mL)
847
1462
2202
3004


220 (0.1 mg/mL)
811
1522
2202
2887


220 w/ Trp (0.1 mg/mL)
537
1080
1590
2401


220 (0.5 mg/mL)
2885
3446
3813
4066


220 w/ Trp (0.5 mg/mL)
1933
3223
3939
3911









The reaction containing 0.1 mg/mL of the SEQ ID NO:220 polypeptide showed a similar monatin formation time course as the reaction containing 0.5 mg/mL of the SEQ ID NO:870 T242N polypeptide. Addition of D-tryptophan (10 mM) to the solution containing the purified protein eliminated the precipitation. Activity loss was observed for the sample in which SEQ ID NO:220 was incubated with D-tryptophan (10 mM) overnight on ice, but no negative effect was observed when the SEQ ID NO:870 T242N polypeptide was treated with D-tryptophan (10 mM). The presence of HMG was also analyzed qualitatively for reactions catalyzed by the SEQ ID NO:220 polypeptide by comparing peak areas. When both DAT polypeptides were utilized at a concentration of 0.5 mg/mL, the reaction catalyzed by the SEQ ID NO:220 polypeptide formed around 40% of the HMG compared to the reaction containing the SEQ ID NO:870 T242N polypeptide. Earlier time points show an even more pronounced difference between the two enzymes.
In an attempt to prevent the protein precipitation during the purification of the SEQ ID NO:220 polypeptide, DTT (5 mM) was included in all the buffers including the Bugbuster reagent, the buffers for His-Bind column and the buffer for PD-10 column. No precipitation was observed after the desalting column, and no negative effect was observed on the activity of the SEQ ID NO:220 polypeptide when DTT was included during purification or added into purified protein solution at a concentration of 2 mM. Data for monatin formation assays are shown in Table 32. The amount of DAT polypeptide used is indicated in the left column in parentheses. “added DTT” indicates that 2 mM DTT was added to resolubilize the protein after purification; and “purified w/ DTT” indicates that 5 mM DTT was present throughout the purification.







TABLE 32







Monatin Formed (ppm)












Polypeptide (SEQ ID NO:)
2 hr
4 hr
24 hr
















B. sphaericus (0.5 mg/mL)
426
965
2638



870 T242N (0.5 mg/mL)
977
1916
4227



220 (0.1 mg/mL)
1214
2163
3964



220 (0.5 mg/mL)
3534
4246
4415



220 added DTT (0.1 mg/mL)
1287
2202
3566



220 added DTT (0.4 mg/mL)
3495
4833
5082



220 purified w/ DTT (0.1 mg/mL)
1204
2169
3997



220 purified w/ DTT (0.5 mg/mL)
3562
4110
4353










The highly desirable properties of the SEQ ID NO:220 polypeptide make it an excellent candidate for further mutagenesis or directed evolution experiments.
Site-Directed Mutagenesis of the SEQ ID NO:220 Polypeptide
A loop region of the DAT polypeptide related to the Bacillus DAT polypeptide was identified as being important for the substrate specificity and stereospecificity of the enzymes (Ro et al., 1996, FEBS Lett, 398:141-145; Sugio et al., 1995, Biochemistry 34:9661-9669; and EP 1 580 268). One key residue in this region is a T at residue 242 (in the DAT polypeptide from ATCC #4978, this position corresponds to a T at residue 243). A T242N mutant of the SEQ ID NO:870 polypeptide showed improvement in both activity and stereospecificity, as did the T243N mutant of DAT 4978 (see Example 10). Primary sequence alignment of the SEQ ID NO:220 polypeptide with the SEQ ID NO:870 polypeptide showed only 35% amino acid sequence identity and 65% homology. The T242 residue in SEQ ID NO:870 aligned with a G240 residue in SEQ ID NO:220, which is followed by a T241 residue. Using Accelrys DS Modeler software for both proteins (with Bacillus YM-1 structures as templates), it was difficult to overlap the loop region of the SEQ ID NO:870 polypeptide with the SEQ ID NO:220 polypeptide. Therefore, both amino acids were chosen as targets for site-directed mutagenesis.
A mutant polypeptide designated SEQ ID NO:220 G240N and SEQ ID NO:220 T241N were generated by site-directed mutagenesis of the corresponding nucleic acid (SEQ ID NO:219) as described in Example 4. The two mutant polypeptides were expressed and purified as 6×His-tagged fusion proteins that were used in the monatin formation assay. Yellow precipitation was observed at the desalting step for both of the mutant SEQ ID NO:220 polypeptides. Results are shown in Tables 33 and 34 for monatin formation assays. The amount of D-aminotransferase used is indicated in the left-hand column in parentheses. Different preparations of the SEQ ID NO:220 polypeptide were utilized in the assay. “ferm” indicates that the SEQ ID NO:220 polypeptide used was produced in a fermentor as described in Example 15.







TABLE 33







Monatin Produced (ppm)











Polypeptide (SEQ ID NO:)
2 hrs
4 hrs
8 hrs
24 hrs














B. sphaericus (0.5 mg/mL)
440
777
1510
2621


870 T242N (0.5 mg/mL)
961
1913
2793
3904


ferm 220 (0.1 mg/mL)
1396
2379
3217
3770


ferm 220 (0.2 mg/mL)
2301
3277
3789
4328


ferm 220 w/ DTT (0.1 mg/mL)
1434
2384
3109
3730


ferm 220 w/ DTT (0.2 mg/mL)
2423
3568
3859
4755


220 (0.1 mg/mL)
1109
1912
2809
3713


220 T241N (0.1 mg/mL)
554
856
1084
1986
















TABLE 34







Monatin Formed (ppm)













Polypeptide (SEQ ID NO:)
2 hr
4 hr
8 hr
24 hr

















B. sphaericus (0.5 mg/mL)
634
938
1651
2754



870 T242N (0.5 mg/mL)
1422
1922
3211
3793



ferm 220 (0.1 mg/mL)
1976
2505
3442
4211



ferm 220 (0.2 mg/mL)
3198
3430
4452
4639



220 G240N (0.1 mg/mL)
3
5
14
42



220 G240N (0.2 mg/mL)
9
17
46
94










A very small amount of monatin (95.7% R,R monatin) was formed in the reaction catalyzed by the mutant SEQ ID NO:220 G240N polypeptide. The mutant SEQ ID NO:220 T241N polypeptide lost about 50% of the activity, but still maintained the stereospecificity (99.7% R,R monatin produced). These results, together with the homology (sequence identity) modeling and alignments, suggest that, in the region surrounding residues 242-243 (and potentially beyond), the structure of the SEQ ID NO:220 polypeptide is not similar to the structure of the SEQ ID NO:870 polypeptide or the structure of the Bacillus-like DAT polypeptide in the literature. Since there is no x-ray crystal structure, random mutagenesis, combinatorial approaches and other directed evolution approaches of the SEQ ID NO:220 polypeptide and related DAT polypeptides are expected to be highly productive in further improving the enzyme's activity.
Example 15
Production of a DAT in a Fermentor
Bacterial growth media components were from Difco, Fisher Scientific, or VWR; other reagents were of analytical grade or the highest grade commercially available. The fermentation was run in a New Brunswick Scientific (Edison, N.J.) BioFlo 3000® fermenter. Centrifugation was carried out using a Beckman (Fullerton, Calif.) Avanti® J-25I centrifuge with a JLA-16.250 or JA-25.50 rotor.
The DAT nucleic acid encoding the polypeptide having the sequence in SEQ ID NO:220 with a C-terminal His-tag was cloned using Nde I/Xho I restriction sites into the pMet1a vector described in Example 16. The antibiotic marker (bla gene) can further be removed using Psi I restriction enzyme digestion, gel purification of the vector band, self-ligation of the vector ends, transformation into the E. coli host, and selection on minimal medium plates that do not contain methionine. Typically, Neidhardt's medium with 15 amino acids is used. The cloning sites were NdeI/XhoI to insert the SEQ ID NO:220 nucleic acid sequence into pMET1a (see Example 16).
The SEQ ID NO:220 DAT polypeptide carrying a C-terminal His-purification tag was produced in a fermentor at the 2.5-L scale, in a fed-batch process that achieves high cell densities and high levels of expression of the desired protein. The protocol and results for growth of E. coli strain B834(DE3)::SEQ ID NO:220cHIS pMET1 are described as follows: Starting from a fresh culture plate (Neidhardt's+15 amino acids, no methionine), the cells were grown in 5 mL of Neidhardt's medium supplemented with 15 amino acids, at 30° C. and 225 rpm for 6-8 h. One mL of the culture was transferred to each of 2 125-mL aliquots of the production medium supplemented with 5 g/L of glucose. The flasks were grown at 30° C. and 225 rpm overnight (16-18 h). A fermentor was charged with 2.5 liters of the production medium, containing (per liter): 2.0 g/L (NH4)2SO4; 8.0 g/L K2HPO4; 2.0 g/L NaCl; 1.0 g/L Na3Citrate2H2O; 1.0 g/L MgSO4.7H2O; 0.025 g/L CaCl2.2H2O; 0.05 g/L FeSO4.7H2O; 0.4 mL/L Neidhardt micronutrients, and 2.0 g/L glucose. The fermenter was inoculated with 10% v/v of the overnight culture. Three hours after inoculation, an exponential glucose feed was set up using a 60% w/v glucose solution. The feed was supplied at the required rate to support microbial growth at an exponential rate of 0.15 h−1. When the carbon dioxide evolution rate (CER) had reached a value of 100 mmoles/L/h (approximately 21 hours after inoculation; corresponding to a cell biomass of 15-16 g DCW/L), gene expression was induced with a bolus addition of 2 g/L lactose (fed as a 20% solution). The feed was changed from 60% w/v glucose to 50% w/v glucose+10% w/v lactose while the feed rate was fixed to the rate at time of induction. The “50% w/v glucose+10% w/v lactose” feed was maintained for 6 hours. At the end of the fermentation, the cells were harvested by centrifugation at 5000-7000×g for 10 min and frozen as a wet cell paste at −80° C. Cell paste (318 grams) was harvested from 2.8 L of cell broth.
To prepare cell free extract containing the SEQ ID NO:220 polypeptide, 50 g of wet cell paste was suspended in 150 mL of 50 mM EPPS buffer (pH 8.4) containing 50 μM pyridoxal phosphate (PLP) and then disrupted using a Microfluidics homogenizer (Microfluidics, Newton, Mass.) (3 passes at 18,000 psi), maintaining the temperature of the suspension at less than 15° C. The cell debris was removed by centrifugation (20,000×g for 30 minutes). Two mM DTT was added to the clarified cell extract.
To prepare purified SEQ ID NO:220, 2×25 mL aliquots of clarified cell extract were loaded each onto a 45 mL Chelating SepharoseTM Fast Flow resin (nickel(II) form) column that had been previously equilibrated with 50 mM EPPS (pH 8.4) containing 0.05 mM PLP and 200 mM sodium chloride. After loading the sample, the column was washed/eluted successively with 3-5 volumes of the equilibration buffer, 3-5 volumes of the equilibration buffer containing 25 mM imidazole, 3-5 volumes of the equilibration buffer containing 100 mM imidazole and 3-5 volumes of the equilibration buffer containing 500 mM imidazole. The 500 mM imidazole eluent was concentrated 10× with an Amicon (Billerica, Mass.) Centricon-70 centrifugal filter device (MWCO 10 kDa). The imidazole and sodium chloride were removed by passage through disposable GE Healthcare PD10 desalting columns previously equilibrated with 50 mM EPPS (pH 8.4) containing 0.05 mM PLP. The protein concentration of the desalted solution was determined using the Pierce BCA assay kit (Rockford, Ill.). The purity of each fraction and the level of expression in the cell free extract fraction were determined by SDS-PAGE with 4-15% gradient gels. Approximately 450 mg of protein that was  ̃90% pure was recovered from the 50 mL of clarified cell extract. Two mM DTT was added to 10 mL of the purified protein. The purified protein was dispensed into aliquots (0.5-5 mL) and stored at −80° C.
Bench scale reactions (250 mL) were carried out in 0.7 L Sixfors agitated fermenters (Infors AG, Bottmingen, Switzerland) under a nitrogen headspace. The reaction mix contained 10 mM potassium phosphate, 1 mM MgCl2, 0.05 mM PLP, 200 mM sodium pyruvate and 100 mM D-tryptophan. The reaction mix was adjusted to the appropriate temperature, and adjusted to the appropriate pH with potassium hydroxide. The aldolase described in Example 6 was added as a clarified cell extract at 0.02 mg/mL of target protein. The SEQ ID NO:220 DAT polypeptide was added (either as purified enzyme or as a clarified cell extract) at 0.25 mg/mL of target protein.
The progress of the reactions was followed by measuring monatin concentration using the LC/MS/MS methodology described in Example 3.
Starting with D-tryptophan and under the conditions tested, the pH optimum of the monatin formation reactions using the SEQ ID NO:220 polypeptide was found to be approximately pH 8.0 and the temperature optimum of the monatin formation reactions utilizing the SEQ ID NO:220 polypeptide was found to be approximately 25° C. These reactions have complex dynamics and the optimum reaction conditions for the full monatin production reaction may not be the same as the optimal conditions for individual reactions catalyzed by the DAT polypeptide.
Example 16
The Co-Expression of Chaperones to Increase the Soluble Expression of a DAT Polypeptide
Because the soluble expression of the SEQ ID NO:894 DAT polypeptide was low using the standard expression protocols (either 1 mM IPTG in LB or Novagen Overnight Express Autoinduction System2, see Example 8), co-expression of the SEQ ID NO:894 polypeptide and a variety of commercially available chaperones was examined.
Chaperones:
The TaKaRa Chaperone Set (TAKARA BIO catalog #3340) consists of five different sets of chaperones developed by HSP Research Institute, Inc. They are designed to enable efficient expression of multiple moleculear chaperones known to work in cooperation in the folding process. The set contained the following:


















Resistance


Plasmid
Chaperone
Promoter
Inducer
Marker







pG-
dnaK-dnaJ-grpE;
araB;
L-Arabinose;
chloramphenicol


KJE8
groES-groEL
Pzt1
tetracycline


pGro7
groES-groEL
araB
L-Arabinose
chloramphenicol


pKJE7
dnaK-dnaJ-grpE
araB
L-Arabinose
chloramphenicol


pG-Tf2
groES-groEL-tig
Pzt1
Tetracycline
chloramphenicol


pTf16
tig
araB
L-Arabinose
chloramphenicol









Transformation Protocol

Chemically competent BL21(DE3) cells (EMD Biosciences/Novagen catalog #69450) were transformed with 20 ng of one of the TaKaRa chaperone plasmids and 20 ng of SEQ ID NO:893/pET30a (encoding the SEQ ID NO:894 polypeptide; see Example C2 for the plasmid construction) by heat shock for 30 seconds at 42° C. The transformed cells were recovered in 0.5 mL of SOC medium for 1 hr at 37° C. and plated on LB plates containing 50 mg/L kanamycin and 25 mg/L chloramphenicol. The plates were incubated overnight at 37° C. Colonies were picked from the overnight plates and used to inoculate 5 mL of 2×YT medium containing 50 mg/L kanamycin and 25 mg/L chloramphenicol. After overnight incubation at 37° C., the plasmids were isolated from the cell pellets using a QUIAprep Spin Miniprep Kit (Qiagen catalog #27104). The plasmids were analyzed by restriction digestion with one-cutter enzymes from New England Biolabs (Beverly, Mass.) for both the chaperone plasmid and the SEQ ID NO:893/pET30a plasmid following the manufacture's recommended protocol.














Plasmid
Restriction Enzyme









pG-KJE8
XhoI



pGro7
XbaI



pKJE7
NheI



pG-Tf2
XhoI



pTf16
XbaI










The isolated DNA containing both SEQ ID NO:893/pET30a and pKJE7 was digested with NheI and XbaI.
Expression Studies
Flasks of Novagen Overnight ExpressTM AutoinductionSystem 2 (EMD Biosciences/Novagen catalog #71366) containing solutions 1-6, 50 mg/L kanamycin and 25 mg/L chloramphenicol (25 mL in each flask) were inoculated from fresh plates of the cells co-transformed with a chaperone plasmid and SEQ ID NO:893/pET30. At inoculation the inducers required for the chaperone plasmids were also added.














Plasmid
Inducer concentration









pG-KJE8
 2 mg/mL L-arabinose; 10 ng/mL tetracycline



pGro7
 2 mg/mL L-arabinose



pKJE7
 2 mg/mL L-arabinose



pG-Tf2
10 ng/mL tetracycline



pTf16
 2 mg/mL L-arabinose










The cells were incubated at 30° C. overnight and harvested by centrifugation when the OD at 600 nm reached 6 or greater. The cells were washed with cold 50 mM EPPS buffer (pH 8.4), centrifuged again, and either used immediately or frozen at −80° C.
Cell extracts were prepared by adding 5 mL per g of cell pellet of BugBuster® (primary amine-free) Extraction Reagent (EMD Biosciences/Novagen catalog #70923) with 5 μL/mL of Protease Inhibitor Cocktail II (EMD Bioscience/Calbiochem catalog #539132), 1 μl/mL of Benzonase® Nuclease (EMD Biosciences/Novagen catalog #70746), and 0.033 μl/mL of r-Lysozyme solution (EMD Biosciences/Novagen catalog #71110) to the cells. The cell suspensions were incubated at room temperature with gentle mixing for 15 min; spun at 14,000 rpm for 20 min (4° C.) and the supernatants carefully removed. Total protein concentrations were determined using the Pierce BCA protein assay kit (Pierce catalog #23225) with bovine serum albumin as the standard and a microtiter plate format. The expression of the D-aminotransferase was analyzed by SDS-PAGE using Bio-Rad Ready Gel® Precast 4-15% polyacrylamide gradient gels (Bio-Rad Laboratories catalog #161-1104). BioRad SDS-PAGE low range standards (catalog #161-0304) were run as standards on each gel. Aliquots of the cell extracts (15 μg protein) were mixed with protein loading buffer containing 2% SDS, 10% glycerol, 12.5% 2-mercaptoethanol, 0.1% bromophenol blue and 62.5 mM Tris-HCl (pH 8), incubated at 95° C. for 5 min, cooled and then loaded on the gel. In addition, the combined soluble and insoluble protein expression (total protein) was analyzed for each transformant. A 10 μl aliquot of each cell suspension before centrifugation was diluted in 90 μL protein loading buffer, incubated at 95° C. for 10 min, and cooled. Ten μL of each cooled solution was loaded on the gel.
The soluble protein gel showed that the best soluble expression of the polypeptide having the sequence of SEQ ID NO:894 occurred when chaperones GroEL-GroES (pGro7) were co-expressed.
The expression of the SEQ ID NO:894 polypeptide using an alternative plasmid in the presence of the GroEL-GroES chaperones was also examined. The SEQ ID NO:893 nucleic acid was subcloned into the pMET1a plasmid using the restriction enzymes NdeI and XhoI from New England Biolabs. This plasmid is a derivative of pET23a (EMD Biosciences/Novagen catalog #69745-3) and carries the metE gene (inserted at the NgoMIV site of the plasmid) and can complement the methionine auxotrophy of E. coli strains B834(DE3) and E. coli BW30384(DE3) ompTmetE (“EE2D”). The construction of the “EE2D” strain is described in WO 2006/066072. The construction of an analogous plasmid to pMET1a that is a derivative of pET23d is described in the same PCT application.
The SEQ ID NO:893/pMET1a plasmid (25 ng) was transformed into “EE2D” electrocompetent cells singly or was co-transformed with pGro7 (20 ng) using the standard Bio-Rad electroporation protocol for E. coli cells with a Bio-Rad Gene Pulser II system (catalog #165-2111). The transformed cells were recovered in 0.5 mL of SOC medium for 1 h at 37° C. and plated on LB plates containing 100 mg/L ampicillin or on plates containing 100 mg/L ampicillin and 25 mg/L chloramphenicol (double plasmid transformants). The plates were incubated overnight at 37° C. One colony from each plate set was used to inoculate 50 mL of Novagen Overnight ExpressTM AutoinductionSystem 2 containing solutions 1-6, 100 mg/L ampicillin and 2 mg/mL L-arabinose. The culture inoculated with cells containing the pGro7 plasmid also contained 25 mg/L chloramphenicol. The cells were incubated at 30° C. overnight and harvested by centrifugation when the OD600 reached 6 or greater. The cell pellets were washed with cold 50 mM EPPS buffer (pH 8.4), centrifuged again, and either used immediately or frozen at −80° C. Cell extracts were prepared as described above using the Novagen BugBuster® (primary amine-free) Extraction Reagent. The expression of soluble and total D-aminotransferase was analyzed by SDS-PAGE as described above.
The gel showed that expression of soluble SEQ ID NO:894 polypeptide was greater when the GroEL-GroES proteins were co-expressed. However, the soluble expression was not as high as with the pET30a construct described above.
The effect of incubation temperature during expression was also examined. A 5 mL culture of LB containing 100 mg/L ampicillin and 25 mg/L chloramphenicol was inoculated from a fresh plate of EE2D::SEQ ID NO:894PMET1a+pGro7. The culture was incubated overnight at 30° C. and then used to inoculate 3 flasks, each containing 50 mL of Novagen Overnight ExpressTM Autoinduction System 2 containing solutions 1-6, 100 mg/mL ampicillin, 25 mg/L chloramphenicol, and 2 mg/mL L-arabinose. One flask was incubated at 20° C., the second at 25° C. and the third at 30° C. The cells were harvested when the OD600 reached 6 or greater. The cells were harvested and cell extracts were prepared as described above. Total protein concentrations were determined using the Pierce BCA protein assay kit (Pierce catalog #23225) with bovine serum albumin as the standard and a microtiter plate format. The expression of the D-aminotransferase was analyzed using the Bio-Rad Experion Pro260 Automated Electrophoresis Station following the manufacturer's protocol with the cell extract solutions diluted to 1 mg/mL. The results are shown in Table 35. It appears that the lowest temperature gave the maximum amount of expression of the SEQ ID NO:894 polypeptide.










TABLE 35








Estimated DAT


Lane
Sample
Temp
Expression







1
Pro260 Ladder




2
EE2D::23463pMET1 + pGRO7 cell
20° C.
23%



extract


3
EE2D::23463pMET1 + pGRO7 cell
25° C.
21%



extract


4
EE2D::23463pMET1 + pGRO7 cell
30° C.
19%



extract









Activity Assay Protocol

The enzymatic activity of the SEQ ID NO:894 DAT co-expressed with the GroEL-GroES chaperones was tested following the standard monatin reaction protocol. Briefly, each assay tube contained the following (in a total of 2 mL): 0.050 mg/mL aldolase in cell extract (assuming 20% soluble expression); 1.0 mg/mL D-aminotransferase in cell extract (assuming 20% soluble expression for an extract containing the SEQ ID NO:894 polypeptide) or purified B. sphaericus D-aminotransferase; 0.01% Tween-80; 200 mM sodium pyruvate; 100 mM D-tryptophan; 100 mM EPPS (pH 8.2); 1 mM MgCl2; 0.05 mM PLP; and 10 mM potassium phosphate.
The reactions were incubated at room temperature in a Coy Laboratory Products, Inc. anaerobic chamber to minimize exposure to oxygen. All components except the enzymes were mixed together (the tryptophan did not completely dissolve until at least 1 h after the addition of the enzymes). The reactions were initiated by the addition of the enzymes. Samples were withdrawn at 1, 4, 8 and 22 h. A control reaction using 1 mg/mL purified B. sphaericus DAT was also run. The construction, expression and purification of this DAT are described in Example 6. The concentrations of the substrates and products were measured as described in Example 3.
The results are shown in Table 36. At 22 h, the concentration of monatin was 9.2 mM when the SEQ ID NO:894 polypeptide was present and 12.4 mM when the B. sphaericus enzyme was used. The concentration of the co-product HMG was significantly less when the SEQ ID NO:894 polypeptide was in the assay mixture (<1⁄3 the concentration when compared to the assay sample containing B. sphaericus enzyme). The HMG concentrations were evaluated by comparing the peak areas of the OPA derivatized samples.







TABLE 36







Monatin Formation (mM)













Polypeptide (SEQ ID NO:)
1 h
4 h
8 h
22 h

















894 DAT + GroEL-ES
1.3
4.5
6.8
9.2



B. sphaericus DAT
1.6
5.7
8.3
12.4










Example 17
Use of ArcticExpressTM System to Increase Soluble DAT Polypeptide Expression
Because the soluble expression of the SEQ ID NO:894 polypeptide was low using the standard expression protocols (either 1 mM IPTG in LB or Novagen Overnight ExpressTM AutoinductionSystem 2—see Example 8), expression of the SEQ ID NO:893/pMET1a plasmid in the Stratagene ArcticExpressTM system was examined.
The Stratagene ArcticExpressTM system contains E. coli competent cells that carry the psychrophilic chaperones Cpn10 and Cpn60. These are chaperones isolated from the psychrophilic organism Oleispira antarctica. Cpn10 and Cpn60 show high sequence similarity to the E. coli chaperones GroEL and GroES, respectively, and have high protein folding activities at 4-12° C. The ArcticExpressTM host cells are derived from the E. coli BL21strain. Not only do these cells lack the Lon protease, but they have been engineered to be deficient in OmpT protease as well.
Transformation Protocol
The plasmid SEQ ID NO:893/pMET1a (described in Example 16) was transformed into chemically competent ArcticExpressTM (DE3) cells (catalog #230192) following the manufacturer's protocol. The transformed cells were recovered in 0.5 mL of SOC medium for 1 h at 37° C. and plated on LB plates containing 100 mg/L ampicillin. The plates were incubated overnight at 37° C. and then stored at 4° C.
Expression Protocol
Colonies from the transformation plates were used to inoculate 5 mL of 2×YT medium containing 100 mg/L ampicillin and 10 mg/L gentamycin and incubated overnight at 30° C. Flasks of Novagen Overnight ExpressTM AutoinductionSystem 2 (EMD Biosciences/Novagen catalog #71366) containing solutions 1-6, with 100 mg/L ampicillin and 12 mg/L gentamycin were inoculated using the overnight cultures. After incubation at 30° C. for 6 h and the Overnight ExpressTM cultures were moved to either 15° C. or 20° C. or 25° C. incubators. The incubations were continued until the OD at 600 nm of the cultures reached 6 or greater. The cells were harvested by centrifugation, washed with cold 50 mM EPPS, pH 8.4, and the cell pellets were frozen at −80° C.
Cell extracts were prepared by adding 5 mL per g of cell pellet of BugBuster® (primary amine-free) Extraction Reagent (EMD Biosciences/Novagen catalog #70923) with 5 μL/mL of Protease Inhibitor Cocktail II (EMD Bioscience/Calbiochem catalog #539132), 1 μl/mL of Benzonase Nuclease (EMD Biosciences/Novagen catalog #70746), and 0.033 μl/mL of r-LysozymeTM solution (EMD Biosciences/Novagen catalog #71110) to the cells. The cell suspensions were incubated at room temperature with gentle mixing for 15 min; spun at 14,000 rpm for 20 min (4° C.) and the supernatants were carefully removed. Total protein concentrations were determined using the Pierce BCA protein assay kit (Pierce catalog #23225) with bovine serum albumin as the standard and a microtiter plate format. The expression of the D-aminotransferase was analyzed using the Bio-Rad Experion Pro260 Automated Electrophoresis Station following the manufacturer's protocol with the cell extracts solutions diluted to 1 mg/mL.
The electrophoresis results show that the ArcticExpressTM system significantly increased the soluble expression of the SEQ ID NO:894 polypeptide when compared to the expression without chaperones or when co-expressed with the E. coli GroEL-GroES chaperones described in Example 16. The soluble expression was higher at lower temperatures, but still very high at 25° C.















Incubation
Estimated DAT


Lane
Sample
Temperature
Expression







1
Pro260 Ladder




2
ArcticExpress(DE3)::894pMET1
15° C.
58%



cell extract


3
ArcticExpress(DE3)::894pMET1
20° C.
46%



cell extract


4
ArcticExpress(DE3)::894pMET1
25° C.
47%



cell extract









Activity Assay Protocol:

The enzymatic activity of the SEQ ID NO:894 polypeptide expressed in the ArcticExpressTM system was tested by following monatin formation in the presence of the aldolase described in Example 6. Each assay tube contained the following (in a total of 2 mL): 0.010 mg/mL aldolase in cell extract (assuming 20% soluble expression); 1.0 or 2.0 mg/mL of the SEQ ID NO:894 polypeptide in cell extract (assuming 50% soluble expression for the extract containing the SEQ ID NO:894 polypeptide) or purified B. sphaericus D-aminotransferase; 0.01% Tween-80; 200 mM sodium pyruvate; 100 mM D-tryptophan; 100 mM EPPS, pH 8.2; 1 mM MgCl2; 0.05 mM PLP; and 10 mM potassium phosphate.
The reactions were incubated at room temperature in a Coy Laboratory Products, Inc. anaerobic chamber to minimize exposure to oxygen. All components except the enzymes were mixed together (the tryptophan did not completely dissolve until at least 1 h after the addition of the enzymes). The reactions were initiated by the addition of the enzymes. Samples were withdrawn at 1, 4, 7 and 22 h. Control reactions using 1 or 2 mg/mL purified B. sphaericus D-aminotransferase were also run. The concentrations of the substrates and products were measured as described in Example 3. The results are shown in Table 37. At 22 h, the concentration of monatin was 8.2 mM when the SEQ ID NO:894 polypeptide was present at 1 mg/mL and 10.5 mM at 2 mg/mL DAT polypeptide. When the B. sphaericus enzyme was added at 1 mg/mL, the concentration of monatin at 22 h was 10.7 mg/mL; at 2 mg/mL, the monatin concentration was 14.5 mM. The stereopurity (as determined by the FDAA derivatization protocol in Example 3) of the product was >98% R,R with both enzymes and enzyme concentrations. The concentration of the co-product HMG was significantly less when the SEQ ID NO:894 polypeptide was used ( ̃1⁄3 the concentration when compared to the assay samples containing B. sphaericus enzyme at either enzyme concentration). The HMG concentrations were evaluated by comparing the peak areas of the OPA derivatized samples.







TABLE 37







Monatin Formation (mM)













Polypeptide (SEQ ID NO:)
1 h
4 h
7 h
22 h

















894 DAT (1 mg/mL)
0.9
2.3
3.6
8.3



894 DAT (2 mg/mL)
1.4
3.7
6.3
10.5



B. sphaericus DAT (1 mg/
1.0
4.2
6.1
10.7



lmL)



B. sphaericus DAT (2 mg/
1.5
6.7
8.2
14.5



lmL)










Example 18
Use of Stratagene ArcticExpressTM System to Increase Soluble DAT Expression
Transformation Protocol:
The plasmids SEQ ID NO:891/pET30a (encoding the SEQ ID NO:892 polypeptide), SEQ ID NO:873/pET30a (encoding the SEQ ID NO:874 polypeptide) and the Clostridium beijerinckii DAT (CbDAT) in pET30a were transformed into chemically competent Stratagene ArcticExpressTM (DE3) cells (catalog #230192) following the manufacturer's protocol. The cloning of these genes is described in Example 4 and assay results are in Example 9. The transformed cells were recovered in 0.5 mL of SOC medium for 1 h at 37° C. and plated on LB plates containing 100 mg/L ampicillin and 13 mg/L gentamycin. The plates were incubated at room temperature for 2 days and then stored at 4° C.
Expression Protocol:
Colonies from the transformation recovery plates were used to inoculate 5 mL of 2×YT medium containing 50 mg/L kanamycin and 13 mg/L gentamycin; the liquid cultures were incubated for 6 h at 30° C. Flasks of Novagen Overnight ExpressTM AutoinductionSystem 2 (EMD Biosciences/Novagen catalog #71366) containing solutions 1-6, with 100 mg/L ampicillin and 13 mg/L gentamycin were inoculated from the 5 mL cultures. After incubation at 30° C. for 5-6 h, the cultures were moved to a 15° C. incubator. The 15° C. incubations were continued until the OD600 of the cultures reached 6 or greater. The cells were harvested by centrifugation, washed with cold 50 mM EPPS, pH 8.4, and then the cell pellets were frozen at −80° C.
Cell extracts were prepared by adding 5 mL per g of cell pellet of BugBuster (primary amine-free) Extraction Reagent (EMD Biosciences/Novagen catalog #70923) with 5 μL/mL of Protease Inhibitor Cocktail II (EMD Bioscience/Calbiochem catalog #539132), 1 μl/mL of Benzonase Nuclease (EMD Biosciences/Novagen catalog #70746), and 0.033 μl/mL of r-LysozymeTM solution (EMD Biosciences/Novagen catalog #71110) to the cells. The cell suspensions were incubated at room temperature with gentle mixing for 15 min; spun at 14,000 rpm for 20 min (4° C.) and the supernatants were carefully removed. Total protein concentrations were determined using the Pierce BCA protein assay kit (Pierce catalog #23225) with bovine serum albumin as the standard and a microtiter plate format. The expression of the DAT was analyzed using the Bio-Rad Experion Pro260 Automated Electrophoresis Station following the manufacturer's protocol with the cell extracts solutions diluted to 1 mg/mL. The results are shown in Tables 38 and 39.
The electrophoresis results show that the SEQ ID NO:874 polypeptide expressed in a soluble form slightly better than the SEQ ID NO:892 polypeptide using the ArcticExpressTM system. The soluble expression of the Cb DAT varied depending on the colony picked in the transformation plate. None of these DAT polypeptides expressed in a soluble form using the ArcticExpressTM system as well as the SEQ ID NO:894 polypeptide described in Example 16 was expressed.










TABLE 38








Estimated




Incubation
DAT


Lane
Sample
Temperature
Expression


















1
Pro260 Ladder




2
ArcticExpress(DE3)::891/pET30a cell
15° C.
11%



extract (colony #1)


3
ArcticExpress(DE3)::891/pET30a cell
15° C.
9%



extract (colony #2)


4
ArcticExpress(DE3)::873/pET30a cell
15° C.
15%



extract (colony #1)


5
ArcticExpress(DE3)::873/pET30a cell
15° C.
10%



extract (colony #2)


6
ArcticExpress(DE3)::891/pET30a cell
15° C.
9%



extract (colony #1)


7
ArcticExpress(DE3)::891/pET30a cell
15° C.
8%



extract (colony #2)


9
ArcticExpress(DE3)::873/pET30a cell
15° C.
15%



extract (colony #1)


10
ArcticExpress(DE3)::873/pET30a cell
15° C.
11%



extract (colony #2)



















TABLE 39







Incubation
Estimated DAT


Lane
Sample
Temperature
Expression


















1
Pro260 Ladder




2
ArcticExpress(DE3)::CbDAT
15° C.
9%



in pET30a cell



extract (colony #1)


3
ArcticExpress(DE3)::CbDAT
15° C.
19%



in pET30a cell



extract (colony #2)


4
ArcticExpress(DE3)::CbDAT
15° C.
13%



in pET30a cell



extract (colony #3)


5
ArcticExpress(DE3)::CbDAT
15° C.
4%



in pET30a cell



extract (colony #4)









Activity Assay Protocol

The enzymatic activity of the DAT polypeptides expressed in the ArcticExpressTM system were tested by following monatin formation in the presence of the aldolase described in Example 6. Each assay tube contained the following (in a total of 3 mL): 0.050 mg/mL aldolase in cell extract (estimating 20% soluble expression); 0.5 mg/mL DAT polypeptide in cell extract (estimating the soluble expression from the Experion data) or purified B. sphaericus DAT; 0.01% Tween-80; 200 mM sodium pyruvate; 100 mM D-tryptophan; 50 mM EPPS, pH 8.2; 1 mM MgCl2; 0.05 mM PLP; and 10 mM potassium phosphate.
The reactions were incubated at room temperature in a Coy Laboratory Products, Inc. anaerobic chamber to minimize exposure to oxygen All components except the enzymes were mixed together (the tryptophan did not completely dissolve until at least 1 h after the addition of the enzymes). The reactions were initiated by the addition of the enzymes. Samples were withdrawn at 2, 4.5, 9 and 24 h. Control reactions with purified B. sphaericus D-aminotransferase were also run. The concentrations of the substrates and products were measured as described in Example 3. At 24 h, the assays containing the SEQ ID NO:892 or 894 polypeptide had produced approximately the same titer of monatin as the control B. sphaericus DAT reaction. The C. beijerinckii DAT reaction produced less than one-eighth of the monatin product, while the SEQ ID NO:874 polypeptide produced about half. The stereopurity of the product at 24 h (as determined by the FDAA derivatization protocol in Example 3) was 96% R,R monatin or greater for the SEQ ID NO:892 polypeptide. The concentration of the by-product HMG (4-hydroxy-4-methyl glutamic acid) was measured for the reactions with the SEQ ID NO:892, the SEQ ID NO:894 and the B. sphaericus DAT polypeptides. The assay with polypeptides having the sequence shown in SEQ ID NO:894 produced far less of the HMG by-product than the other two (about 20% of that produced by the assay containing the B. sphaericus DAT and about 40% of that produced by the assay with the SEQ ID NO:892 polypeptide). The HMG concentrations were estimated by comparing the peak areas of the OPA post-column derivatized samples.







TABLE 40







Monatin Formation (mM)













Polypeptide (SEQ ID NO:)
2 h
4.5 h
9 h
24 h







C. beijerinckii DAT
0.3
0.7
0.8
0.9



874 DAT
1.8
3.2
4.1
4.4



892 DAT
1.6
3.7
5.4
8.4



894 DAT
1.4
2.8
4.5
8.4



B. sphaericus DAT
1.2
2.9
4.3
8.1










These results indicate that when expressed under the appropriate conditions, the polypeptides having the sequence of SEQ ID NO:892 and 894 can be utilized in reactions to produce highly pure R,R monatin at a titer as high as the positive control enzyme.
Example 19
Evaluation of Alternative Expression Hosts to Increase the Soluble Expression of a DAT
Because the soluble expression of the SEQ ID NO:894 polypeptide was low when the nucleic acid was expressed in BL21(DE3) (see Example 8), alternative expression hosts were evaluated for improving soluble expression. The OverExpressTM C41(DE3) and C43(DE3) hosts contain genetic mutations phenotypically selected for conferring toxicity tolerance and express some toxic proteins at higher titers than other E. coli hosts.
Transformation Protocol
The plasmid SEQ ID NO:893/pET30a was transformed into electrocompetent cells of the OverExpressTM C41(DE3) and C43(DE3) (Lucigen catalog #60341 and 60345, respectively) using a Bio-Rad Gene Pulsar II system following the manufacturer's protocol. The transformation mixtures were recovered in 1 mL SOC medium for 1 hr at 37° C. and plated on LB plates containing 50 mg/L kanamycin. The plates were incubated overnight at 37° C. Multiple colonies were patched onto fresh plates and analyzed for the appropriate insert size using colony PCR. A small aliquot of cells was suspended in 0.025 mL H2O and incubated at 95° C. for 10 min. After cooling, 2 μL of each of the suspensions were used as the template in 0.025 mL reactions, each also containing 0.5 A T7 promoter primer (0.1 mM), 0.5 A T7 terminator primer (0.1 mM), 0.5 A PCR Nucleotide Mix (Roche #12526720; 10 mM each nucleotide), 2.5 μL Roche Expand DNA polymerase buffer #2, and 0.5 A Expand DNA polymerase (Roche Expand High Fidelity PCR System catalog #1732650). The 3-step thermocycler program was run for 25-30 cycles: 1 min at 94° C.; 1 min at 54° C., 1.3 min at 72° C. with a final polishing step of 7 min at 72° C.
Expression Studies
Flasks of Novagen Overnight ExpressTM AutoinductionSystem 2 (EMD Biosciences/Novagen catalog #71366) containing solutions 1-6 and 50 mg/L kanamycin (40 mL in each flask) were inoculated from the patch plates of the transformed C41(DE3) and C43(DE3) cells (2 patches for each of the transformations). The cells were incubated at 30° C. overnight and harvested by centrifugation when the OD600 reached 6 or greater. The cells were washed with cold buffer, were centrifuged again, and either used immediately or frozen at −80° C.
Cell extracts were prepared by adding 5 mL per g of cell pellet of BugBuster® (primary amine-free) Extraction Reagent (EMD Biosciences/Novagen catalog #70923) with 5 μL/mL of Protease Inhibitor Cocktail II (EMD Bioscience/Calbiochem catalog #539132), 1 μl/mL of Benzonase® Nuclease (EMD Biosciences/Novagen catalog #70746), and 0.033 μl/mL of r-LysozymeTM solution (EMD Biosciences/Novagen catalog #71110) to the cells. The cell suspensions were incubated at room temperature with gentle mixing for 15 min; spun at 14,000 rpm for 20 min (4° C.) and the supernatants carefully removed. Total protein concentrations were determined using the Pierce BCA protein assay kit (Pierce catalog #23225) with bovine serum albumin as the standard and a microtiter plate format. The expression of the DAT polypeptide was analyzed by SDS-PAGE using Bio-Rad Ready Gel® Precast 4-15% polyacrylamide gradient gels (Bio-Rad Laboratories catalog #161-1104). BioRad SDS-PAGE low range standards (catalog #161-0304) were run as standards on each gel. Aliquots of the cell extracts (15 μg protein) were mixed with protein loading buffer containing 2% SDS, 10% glycerol, 12.5% 2-mercaptoethanol, 0.1% bromophenol blue and 62.5 mM Tris-HCl (pH 8), incubated at 95° C. for 5 min, cooled and then loaded on the gel. In addition, the combined soluble and insoluble protein expression (total protein) was analyzed for the transformants. A 10 μl aliquot of each cell suspension before centrifugation was diluted in 90 μL protein loading buffer, incubated at 95° C. for 10 min, and cooled. Ten μL of each cooled solution was loaded on the gel.
The electrophoresis gel shows that the protein expressed better in the C41(DE3) host than in the C43(DE3) host, however the apparent soluble expression was not higher than when BL21(DE3) cells were used.
Example 20
Evaluation of Low Temperature Expression to Increase Soluble DAT Expression
Because the soluble expression of SEQ ID NO:894 D-aminotransferase was low when the gene was expressed in the E. coli strain BL21(DE3) (see Example 8), the gene was inserted in vectors with cold shock Protein A promoters to evaluate low temperature expression.
The Takara pCold Expression Vectors are four different vectors that utilize the cold shock Protein A (cspA) promoter for expression of high purity, high yield recombinant protein in E. coli. These vectors selectively induce target protein synthesis at low temperatures (15° C.) where the synthesis of other proteins is suppressed and protease activity is decreased. In addition to the cspA promoter, all four vectors contain a lac operator (for control of expression), ampicillin resistance gene (ampr), ColE1 origin of replication, M13 IG fragment, and multiple cloning site (MCS). Three of the vectors also contain a translation enhancing element (TEE), a His-Tag sequence, and/or Factor Xa cleavage site.
Cloning Protocol
The SEQ ID NO:894 DAT nucleic acid from plasmid SEQ ID NO:894pET30a was subcloned into the Takara pCold vectors at the NdeI and XhoI sites of the pCOLDII (contains a TEE and a His-tag sequence), pCOLDIII (contains a TEE) and pCOLDIV vectors. The digested vector and insert bands were gel purified using a QIAquick Gel Extraction Kit (Qiagen catalog #28704) and ligated using a Roche Rapid DNA Ligation Kit (catalog #1635379) following the manufacturer's protocol. The ligation mixtures were transformed into Invitrogen OneShot TOP10 chemically competent cells (catalog # C404003) by heat shock at 42° C. After recovery in 500 μL SOC medium for 1 h at 37° C., the transformation mixtures were plated on LB plates containing 100 mg/L ampicillin and incubated at 37° C. overnight. Colonies were picked from the transformation plates and used to inoculate 5 mL cultures of LB containing 100 mg/mL ampicillin that were incubated overnight at 37° C. Plasmid DNA was purified from the 5 mL cultures using a QIAprep® Spin Miniprep Kit (Qiagen catalog #27104). The inserts were verified restriction digestion with NdeI and XhoI by sequencing (Agencourt Bioscience Corp, Beverly, Mass.).
The SEQ ID NO:894dat pCOLD plasmids were transformed into chemically competent Stratagene ArcticExpressTM (DE3) cells and Novagen BL21(DE3) cells following the manufacturers' protocols. The transformation mixtures were recovered in 0.5-1 mL SOC medium for 1 h at 37° C. and plated on LB plates containing 100 mg/mL ampicillin and 13 mg/L gentamycin (ArcticExpressTM (DE3)) or 100 mg/mL ampicillin (BL21(DE3)). The plates were incubated overnight at 37° C.
Expression Studies
Flasks of Novagen Overnight ExpressTM AutoinductionSystem 2 (EMD Biosciences/Novagen catalog #71366) containing solutions 1-6 and 100 mg/L ampicillin and 13 mg/L gentamycin (ArcticExpressTM (DE3)) or 100 mg/mL ampicillin (BL21(DE3) were inoculated from the patch plates of the transformed cells (2 patches for each of the SEQ ID NO:893/pCOLDII, SEQ ID NO:893/pCOLDIII and SEQ ID NO:893/pCOLDIV transformations).
After incubation at 30° C. for 3-5 hr the cultures were moved to a 15° C. incubator. The 15° C. incubations were continued until the OD at 600 nm of the cultures reached 6 or greater. The cells were harvested by centrifugation, washed with cold buffer, and then the cell pellets were frozen at −80° C.
Cell extracts were prepared by adding 5 mL per g of cell pellet of BugBuster® (primary amine-free) Extraction Reagent (EMD Biosciences/Novagen catalog #70923) with 5 μL/mL of Protease Inhibitor Cocktail II (EMD Bioscience/Calbiochem catalog #539132), 1 μl/mL of Benzonase® Nuclease (EMD Biosciences/Novagen catalog #70746), and 0.033 μl/mL of r-LysozymeTM solution (EMD Biosciences/Novagen catalog #71110) to the cells. The cell suspensions were incubated at room temperature with gentle mixing for 15 min; spun at 14,000 rpm for 20 min (4° C.) and the supernatants were carefully removed. Total protein concentrations were determined using the Pierce BCA protein assay kit (Pierce catalog #23225) with bovine serum albumin as the standard and a microtiter plate format. The expression of the D-aminotransferase was analyzed using the Bio-Rad ExperionTM Pro260 Automated Electrophoresis Station following the manufacturer's protocol with the cell extract solutions diluted to 1 mg/mL. The results are shown in Tables 41 and 42.









TABLE 41







Estimated % DAT


Lane
Sample
Expression







L
Pro260 Ladder



1
BL21(DE3)::SEQ ID NO: 893/pCOLDII#1
8.7


2
BL21(DE3):: SEQ ID NO: 893/pCOLDII#2
8.5


3
ArcticExpress TM(DE3):: SEQ ID NO: 893/
9.8



pCOLDII#1


4
ArcticExpress TM(DE3):: SEQ ID NO: 893/
6.4



pCOLDII#2


















TABLE 42







Estimated %


Lane
Sample
DAT Expression

















L
Pro260 Ladder



1
BL21(DE3):: SEQ ID NO: 893/pCOLDIII#1
4.3


2
BL21(DE3):: SEQ ID NO: 893/pCOLDIII#2
2.3


3
BL21(DE3):: SEQ ID NO: 893/pCOLDIV#1
14.6


4
BL21(DE3):: SEQ ID NO: 893/pCOLDIV#2
14.2


5
BL21(DE3):: SEQ ID NO: 893/pCOLDIII#1
4.4


6
BL21(DE3):: SEQ ID NO: 893/pCOLDIII#2
5.2


7
BL21(DE3):: SEQ ID NO: 893/pCOLDIV#1
13.8


8
BL21(DE3):: SEQ ID NO: 893/pCOLDIV#2
16.1


9
BL21(DE3):: SEQ ID NO: 893/pCOLDIV#1
16.2


10
BL21(DE3):: SEQ ID NO: 893/pCOLDIV#2
16.8









The Experion Pro260 results show that the SEQ ID NO:894 DAT protein expressed better when the nucleic acid was incorporated in the pCOLDIV vector than in either the pCOLDII or pCOLDIII vector. From the experiments shown above, the average expression level for SEQ ID NO:893/pCOLDII was about 8%, regardless of expression host used; the average expression level for SEQ ID NO:893/pCOLDIII was about 4%, while the average expression level for SEQ ID NO:893/pCOLDIV was  ̃15%. These expression levels are significantly less than those described in Examples 16 when the SEQ ID NO:893 nucleic acid was co-expressed with the GroEL-GroES chaperones and in Example 17 when the nucleic acid was expressed in the Stratagene ArcticExpressTM system.
Example 21
Codon Modification of a DAT
An attempt to improve the solubility of the SEQ ID NO:894 polypeptide expressed in E. coli was undertaken with the presumption that, slowing the rate of translation in E. coli would allow more time for proper folding of the SEQ ID NO:894 polypeptide, thereby giving a higher expression of soluble protein. A BLAST search (NCBI) of the SEQ ID NO:894 polypeptide sequence revealed that some of the most closely related public sequences were from Clostridium species, specifically Clostridium beijerinckii. Example 9 describes the results from cloning, expressing, and assaying the CbDAT and its use in monatin formation reactions. Specifically, expression was high in the total protein fraction but very low in the soluble protein fraction.
The codon usage tables of C. beijerinckii and E. coli K12 were compared. Several rarely used codons in C. beijerinckii were found to be highly abundant in E. coli K12 (Table 43). It is possible that these rare codons cause translational pauses in C. beijerinckii., whereas in an E. coli K12 host, there may not be a pause. In the SEQ ID NO:894 sequence, 4 doublets were identified in which tandem rare codons for C. beijerinckii had become “non-rare” (i.e. abundant) in E. coli K12. The goal was to change these codons into rare codons for expression in E. coli K12 host using the E. coli K12 codon usage table. Primers were designed to change these doublets. SEQ ID NO:893/pET30a (described in Example 4) was used as a template and mutation was carried out according to the Stratagene QuickChange kit instructions. The primers utilized to modify the SEQ ID NO:893 nucleic acid sequence are shown below, along with the native gene (the targeted doublet sequences are underlined).











TABLE 43









Codon Usage





(per thousand)
Altered
Codon Usage











Original Codons
C. beijerinckii
E. coli
Codons
E. coli














GCC
3.7
25.6
GCT
15.3


CTG
1.4
52.9
CTA
3.9


ACC
2.5
23.5
ACA
7.0


CGC
0.8
22.0
CGA
3.5


GCG
2.9
33.8
GCT
15.3


CCG
1.1
23.3
CCC
5.4

















>native sequence



SEQ ID NO: 893 



ATGGACGCACTGGGATATTACAACGGAAAATGGGGGCCTCTGGACGAGATGACCGTGCCGATGAACGACAG



 


GGGTTGTTTCTTTGGGGACGGAGTGTACGACGCTACCATCGCCGCTAACGGAGTGATCTTTGCCCTGGACGAGCACA


 


TTGACCGGTTTTTAAACAGCGCAAAGCTCCTGGAAATAGAAATCGGTTTTACAAAAGAGGAATTAAAAAAAACTTTT


 


TTTGAAATGCACTCCAAAGTGGATAAAGGGGTGTACATGGTTTATTGGCAGGCGACTCGCGGAACAGGCCGTCGAAG


 


CCATGTATTTCCGGCAGGTCCCTCAAATCTCTGGATTATGATTAAGCCCAATCACGTCGACGATCTTTATAGAAAAA


 


TCAAGCTCATTACCATGGAAGATACCCGCTTCCTCCACTGCAACATCAAGACCCTTAACCTTATTCCCAATGTCATT


 


GCCTCCCAGCGGGCGCTGGAAGCGGGCTGCCACGAGGCGGTCTTTCACCGGGGTGAAACAGTAACCGAGTGCGCCCA


 


CAGCAATGTCCACATCATTAAAAACGGCAGGTTTATCACCCACCAGGCGGACAACCTAATCCTTCGGGGCATAGCCC


 


GTAGCCATTTATTGCAAGCCTGTATCAGGCTGAACATTCCATTTGACGAACGGGAATTTACCCTTTCGGAATTATTT


 


GACGCGGATGAGATTCTTGTGTCCAGCAGCGGCACACTCGGCCTTAGCGCCAATACAATTGATGGAAAAAACGTGGG


 


GGGAAAAGCGCCGGAACTGCTAAAAAAAATTCAGGGCGAAGTGTTGAGGGAATTTATCGAAGCGACAGGCTACACGC


 


CTGAGTGGAGCACAGTATAG


 


Primers for Doublet 1 mutant


(SEQ ID NO: 1074)



CTAACGGAGTGATCTTTGCTCTAGACGAGCACATTGAC 



 


(SEQ ID NO: 1075)



GTCAATGTGCTCGTCTAGAGCAAAGATCACTCCGTTAG 



 


Primers for Doublet 2 mutant


(SEQ ID NO: 1076)



CATGGAAGATACACGATTCCTCCACTGCAACATCAAGAC



 


(SEQ ID NO: 1077)



GTCTTGATGTTGCAGTGGAGGAATCGTGTATCTTCCATG



 


Primers for Doublet 3 mutant


(SEQ ID NO: 1078)



ATTGCCTCCCAGCGGGCTCTAGAAGCGGGCTGCCACG



 


(SEQ ID NO: 1079)



CGTGGCAGCCCGCTTCTAGAGCCCGCTGGGAGGCAAT



 


Primers for Doublet 4 mutant


(SEQ ID NO: 1080)



GGGGGGAAAAGCTCCCGAACTGCTAAAAAAAATTCAGG



 


(SEQ ID NO: 1081)



CCTGAATTTTTTTTAGCAGGTCGGGAGCTTTTCCCCCC







Clones with the correctly altered sequence were transformed into BL21(DE3) host for enzyme expression assays. Enzyme expression was determined by growing the cells overnight in Overnight Express II and lysing the cells with BugBuster reagent followed by SDS PAGE analyses of crude cell extract and soluble protein.
It appeared that there was a slight improvement in soluble protein expression with codon changes to doublets 1, 2 and 3. Codon changes at doublet 4 were not beneficial for soluble protein expression. Codon changes for doublets 1, 2 and 3 were combined in pairs using the Stratagene QuickChange kit and the primers designed for the initial codon changes. Clones with the correctly altered sequence were transformed into BL21(DE3) host for enzyme expression assays. Enzyme expression was determined by growing the cells overnight in Overnight Express II and lysing the cells with BugBuster reagent followed by SDS PAGE analyses of crude cell extract and soluble protein. The combinations of mutations to doublets 1 and 2, 2 and 3 and 1 and 3 yielded soluble protein bands visible on an SDS-PAGE gel. However, there still appeared to be more protein in the total protein fractions.
Example 22
The Evaluation of Periplasmic Expression of a DAT Polypeptide
Because the soluble expression of the SEQ ID NO:894 polypeptide was low when the gene product was expressed as a cytoplasmic protein in the E. coli host BL21(DE3) (see Example 8), the gene was cloned into vectors to generate fusion proteins that should be exported into the periplasmic space. The periplasm provides conditions that promote proper folding and disulfide bond formation and may enhance the solubility and activity of certain target proteins.
Cloning into EMD Biosciences/Novagen pET26b allows production of the target protein with a periplasmic signal sequence. The signal sequence is cleaved by signal peptidase concomitant with export. The EMD Biosciences/Novagen pET39b and pET40b are designed for cloning and expression of target proteins fused with a 208 amino acid DsbA-TagTM or 236 amino acid DsbC-TagTM. DsbA and DsbC are periplasmic enzymes that catalyze the formation and isomerization of disulfide bonds, respectively. The fusion proteins are typically localized in the periplasm.
Cloning Protocol
The SEQ ID NO:893 nucleic acid from plasmid SEQ ID NO:893/pET30a (described in Example 4) was cloned into the EMD Biosciences/Novagen pET26b (catalog #69862-3), pET39b (catalog #70090-3), and pET40b (catalog #70091-3) vectors at the EcoRI and NotI sites of the vectors. The DATs nucleic acid with a 5′ EcoRI site and a 3′ NotI site was generated using the amplification protocol described in Example 4 and the following primers:









(SEQ ID NO: 1082)



5′-CGCA CGGACGCACTGGGATATTACAAC-3′



 



(SEQ ID NO: 1083)



5′-GTTA TATACTGTGCTCCACTCAG-3′






The restriction sites are in italics in the primer sequences. The resulting DNA product and the pET26b, pET39b and pET40b vectors were digested with EcoR1 and NotI (New England Biolabs) following the suggested manufacturer's protocol. The vector reaction mixtures were subsequently treated with Shrimp Alkaline Phosphatase (Roche catalog #1758250). The digested vector and insert bands were gel purified from a 1% agarose gel using a Qiagen QIAquick® Gel Extraction Kit (catalog #28704) and ligated using a Roche Rapid Ligation Kit (catalog #1635379) following the manufacturer's protocol. The ligation mixtures were transformed into Invitrogen OneShot® TOP10 chemically competent cells (catalog # C404003) by heat shock at 42° C. After recovery in 500 μL SOC medium for 1 h at 37° C., the transformation mixtures were plated on LB plates containing 50 mg/L kanamycin and incubated at 37° C. overnight. Colonies were picked from the transformation plates and used to inoculate 5 mL cultures of LB containing 50 mg/mL kanamycin that were incubated overnight at 37° C. Plasmid DNA was purified from the 5 mL cultures using a Qiagen QIAprep spin miniprep kit (catalog #27104). The nucleic acid sequences were verified by sequencing (Agencourt Bioscience Corp, Beverly, Mass.). Plasmids with the correct insert sequences were transformed into EMD Biosciences/Novagen BL21(DE3) chemically competent cells (catalog #69450) by heat shock as described above.
Expression Studies
Flasks of Novagen Overnight ExpressTM AutoinductionSystem 2 (EMD Biosciences/Novagen catalog #71366) containing solutions 1-6 and 50 mg/L kanamycin (50 mL in each flask) were inoculated from fresh plates of BL21(DE3) cells carrying the SEQ ID NO:893 DAT nucleic acid (encoding the polypeptide of SEQ ID NO:894) in either pET26b, pET39b or pET40b. The cells were incubated at 30° C. overnight and harvested by centrifugation when the OD600 reached 6 or greater. The cells were washed with cold buffer, were centrifuged again, and used immediately or the cell pellets were frozen at −80° C. Before harvesting, 2 mL culture aliquots were withdrawn from each flask for soluble and total protein (soluble and insoluble) expression analyses. Cell extracts were prepared as described in Example 16. Total protein samples were prepared by suspending a small amount of cell pellet in protein loading buffer containing 2% SDS, 10% glycerol, 12.5% 2-mercaptoethanol, 0.1% bromophenol blue and 62.5 mM Tris-HCl, pH 8, and incubating at 95° C. for 10 min
The periplasmic cellular fractions were prepared from the remainder of the cells from each culture following the protocol described in the EMD Biosciences/Novagen pET System Manual. The resulting fractions were concentrated 30-fold using Amicon Ultracel 10k centrifugal filter devices (Millipore catalog #UFC901024). Total protein concentrations of the cell extracts and the periplasmid fractions were determined using the Pierce BCA protein assay kit (Pierce catalog #23225) with Bovine Serum Albumin as the standard and a microtiter plate format. Fifteen μg protein samples of the cell extracts and 10 μg protein samples of the periplasmic fractions were analyzed by SDS-PAGE using Bio-Rad Ready Gel® Precast 4-15% polyacrylamide gradient gels (Bio-Rad Laboratories catalog #161-1104). In addition, the total protein samples were analyzed by SDS-PAGE. BioRad SDS-PAGE low range standards (catalog #161-0304) were run as standards on each gel.
Analysis of the total protein SDS-PAGE gel shows that proteins with the predicted molecular weights expressed using the Overnight ExpressTM AutoinductionSystem 2. However, analysis of the SDS-PAGE gel loaded with the cell extract fractions or with the periplasmic fractions suggests that these proteins did not express solubly nor were they exported into the periplasm.
Example 23
Production of Monatin from indole-3-pyruvate
The maximum concentration of monatin obtained when D-tryptophan and pyruvic acid are the starting raw materials in the monatin formation assay described in Example 5 is limited by the solubility of tryptophan. In order to explore the potential of using an aldolase and the SEQ ID NO:220 DAT polypeptide (described in Example 14) in reaching higher monatin concentrations, the reaction starting with indole-3-pyruvatr (I3P) and pyruvate acid as raw materials were analyzed. In this case, it was also necessary to provide an amino donor such as D-alanine or both D-alanine and D-tryptophan.
The test was conducted using purified SEQ ID NO:220 DAT polypeptide (production and purification described in Example 15) and an aldolase (described in Example 6). The reaction was set up as follows (in a total of 1 mL): 200 mM Indole-3-pyruvate (I3P); 200 mM sodium pyruvate; 400 mM D-alanine; 100 mM EPPS, pH 8.0; 1 mM MgCl2; 0.05 mM PLP; and 10 mM potassium phosphate.
Both enzymes were added in excess to facilitate conversion to monatin to minimize compeption from non-enzymatic degradation reactions. The reactions were incubated at room temperature in a Coy Laboratory Products, Inc. anaerobic chamber to minimize exposure to oxygen All components except the enzymes were mixed together and the pH was adjusted to 8.0. The reactions were initiated by the addition of the enzymes (0.04 mg/mL aldolase as cell extract (assuming 20% expression) and 0.40 mg/mL purified SEQ ID NO:220 DAT polypeptide).
In some tests as indicated in the table below, D-tryptophan was also added at either 50 or 100 mM in addition to the D-alanine to act as amino donor and also to limit the amount of indole-3-pyruvate consumed in the formation of D-tryptophan. The monatin formation was measured after 18 hours using the LC/MS/MS methodology described in Example 3, and the results are presented in Table 44 below.







TABLE 44







Monatin Formation from I3P (mM)











Monatin concentration



Reactant initial concentrations (mM)
(mM)







200 I3P; 200 pyr: 400 D-ala
44.9



200 I3P; 200 pyr: 400 D-ala, 50 D-trp
47.8



200 I3P; 200 pyr: 400 D-ala, 100 D-
61.0



trp










As shown above, the aminotransferase and aldolase enzymes were active at the higher reactant concentrations and a much higher monatin concentration was achieved.
At 18 h, while using 200 mM indole-3-pyruvate, 200 mM sodium pyruvate and 100 mM D-tryptophan, the concentration of monatin was 61 mM. A small increase in monatin production (47.8 mM) was observed under the conditions of the assay, with the addition of 50 mM D-tryptophan vs. just using 400 mM D-alanine.
Example 24
Homology Table
Table 45 shows some of the most active DAT polypeptides and the corresponding closest homologs from the published databases or literature.









TABLE 45





DAT

%


polypeptide

Sequence


(SEQ ID NO:)
Closest Hit from Database
Identity







896
Bacillus sp. YM-1
76


874
Serine glyoxylate transaminase from Acidiphilium
51



cryptum JF-5 (NR Accession No: 148260372)


878
Putative glutamate-1-semialdehyde 2,1-aminomutase
43



from Planctomyces maris DSM 8797 (NR Accession



No. 149173540)


882
D-alanine transaminase from Oceanobacter sp. RED65
57



(NR Accession No: 94500389)


910
DAT from B. macerans
91


176
D-amino acid aminotransferase from Clostridium
62



beijerincki (NCIMB 8052)


220
D-amino acid aminotransferase from Clostridium
62



beijerincki (NCIMB 8052)


156
Aminotransferase class-III (leadered) from
46



Chloroflexus aggregans DSM 9485 (NR Accession No:



118045454)


214
D-amino acid aminotransferase from Clostridium
61



beijerincki (NCIMB 8052)


918
Aminotransferase class IV from Robiginitalea
57



biformata HTCC2501 (NR Accession No: 88806011)


902
Putative glutamate-1-semialdehyde 2; 1-aminomutase
46



from Planctomyces maris DSM 8797 (same protein as



above)


884
D-alanine transaminase from Thiobacillus denitrificans
40



ATCC 25259 (NR Accession No: 74316285)


866
D-alanine aminotransferase from Lactobacillus
49



salivarius subsp. salivarius UCC118


946
D-amino acid aminotransferase from Clostridium
63



beijerincki (NCIMB 8052)









As shown in Example 9, homologs of the polypeptides having the sequence shown in SEQ ID NO:866, 946, 220, and 176 were cloned and also had activity in the production of R,R monatin, despite a sequence identity among those polypeptides of between 49% and 63%. Similarly, the predicted D-alanine transaminase from Oceanobacter species and the Robinginitalea biformata aminotransferase are expected to have broad D-amino acid aminotransferase activity like the DAT polypeptides having the sequence of SEQ ID NO:882 and 918.
Example 25
Construction and Testing of GSSMSM Mutants
This example describes the construction of exemplary nucleic acids and polypeptides, and describes their enzymatic activity. The nucleotide sequence (SEQ ID NO:219) was subcloned into pSE420-C-His vector and expressed in E. coli XL1-BLUE host (Stratagene, La Jolla, Calif.) to produce the exemplary D-aminotransferase (DAT) enzyme having the amino acid sequence shown in SEQ ID NO:220. The pSE420-C-His vector was created by adding a C-terminal His-tag to the pSE420 vector from Invitrogen (Carlsbad, Calif.). Construct SEQ ID NO:220 (in E. coli XL1-BLUE), was used as a starting sequence into which modifications were introduced and is referred to herein as the wild type (WT) sequence. A first round of modification (i.e., single-residue mutations) was performed using Gene Site Saturated MutagenesisSM (GSSMSM) technology (see, for example, U.S. Pat. No. 6,171,820). The mutants made using GSSMSM technology were expressed in the pSE420-C-His vector in E. coli host XL1-BLUE, arrayed into 384-well plates and grown at 37° C. overnight. Samples were subcultured and grown at 30° C. for two nights (36-48 hours). Cultures were frozen at −20° C. until cell lysates could be prepared.
Cells were lysed by addition of 10 μL of BPER II (Thermo Scientific, Rockford, Ill.) to each well. Samples were mixed three times and lysed on ice for one hour. Crude lysates were then assayed in the primary screen. 25 μL of crude lysate was assayed with 1 mM R,R-monatin, 25 mM pyruvic acid sodium salt, 0.08 mM PLP in 50 mM sodium phosphate (pH 8) at room temperature. After three hours, an aliquot was taken and formic acid was added to a final concentration of 2%. Samples were diluted with water to be within the range of the standard curve. Samples were analyzed for monatin consumption and alanine formation using the LC/MS/MS methods described in Example 1 (LC/MS/MS Method for Detecting D-alanine or R,R-monatin). Sample performance was compared to the performance of the wild type control (i.e., SEQ ID NO:220).
Mutants that outperformed the wild type control were selected as hits from the GSSMSM primary screen. Glycerol stocks of the primary hits were used to inoculate new 384-well plates. The hits were arrayed in quadruplicate, grown and lysed as indicated for the primary screen. The primary hits were then tested in a secondary screen. The secondary screen method was the same as for the primary screen except the mutants were tested with 1 mM and 15 mM R,R-monatin substrate. Samples were analyzed for monatin consumption and alanine formation using LC/MS/MS. Sample performance was compared to the performance of the wild type control.
Sample performance was evaluated using a scoring system based on alanine production and monatin consumption. The maximum score for a single sample was six. A maximum of three points were assigned for alanine production and a maximum of three points were assigned for monatin consumption. The scoring criteria were as follows: 1 point assigned for a value between average and one standard deviation of the positive control; 2 points assigned for a value between one and two standard deviations of the positive control; and 3 points assigned for a value beyond two standard deviations of the positive control.
The highest potential total score for a mutant was 48 (since the samples were screened in quadruplicate at 1 and 15 mM monatin). In general, mutants scoring 20 points or more were selected as secondary hits. However, some exceptions were made for samples scoring less than 20 points. Samples with alanine formation and monatin consumption values on the verge of the threshold requirements were also selected as hits. This prevented the premature elimination of hits and allowed for further testing and characterization in the tertiary screen.
Samples identified as secondary screen hits, using the criteria above, are listed in Table 46. Secondary hits were streaked from glycerol stocks onto LB agar plates containing 100 μg/mL carbenicillin and grown overnight at 37° C. Single colonies were used to inoculate 1 mL LB containing carbenicillin (100 μg/mL). Cultures were grown overnight at 37° C. DNA was isolated from the cultures, and then prepared and sequenced using 3730XL automated sequencers (Applied Biosystems, Foster City, Calif.).
Mutations and the amino acid position of the mutation for secondary hits are listed below in Table 46. Numbering of the amino acid positions starts with the N-terminal methionine. For example, the first mutation listed “Y6L” refers to changing the tyrosine in amino acid position 6 of the wild type enzyme (SEQ ID NO:220) to leucine. At the nucleic acid level, any codon which codes for the desired (mutated) amino acid can be used.
All of the amino acid sequences described in Tables 46, 47 and 53, below, are exemplary polypeptides; also provided are nucleic acid sequences that encode such polypeptides.
Example 26
List of GSSMSM Mutations







TABLE 46







GSSMSM Mutants Identified as Secondary Screen Hits








Mutant



name
Mutation





 1
Y6L


 2
Y6C; SILENT MUTATION



AT AA31 (GGC → GGT)


 3
Y6F


 4
Y6L


 5
Y6H


 6
Y6L


 7
Y6M


 8
N10S


 9
N10W


 10
N10T


 11
N10R


 12
N10T


 13
L14V


 14
L14L


 15
G41G


 16
T18W


 17
N40N


 18
V19T


 19
V42V


 20
I62C


 21
V82A


 22
A57M


 23
V42M


 24
G41Y


 25
A45L


 26
V93Y


 27
V93G


 28
L46A


 29
L46H


 30
G98A


 31
P20S


 32
V93A


 33
V103T


 34
P108F


 35
V93L


 36
S101S


 37
A106G


 38
S101Q


 39
P108T


 40
N118G


 41
P108C


 42
I120L


 43
A106W


 44
N118R


 45
N110A; N118G


 46
N118A


 47
N118R


 48
P117W; N118K


 49
D133N


 50
K126Q


 51
K126R


 52
K128S


 53
I127M


 54
T131T


 55
D133L


 56
M132A


 57
D133E


 58
L129V


 59
K126K


 60
I130M


 61
M132Y


 62
K128R


 63
M132R


 64
L129I


 65
K128L; D2D (GAC → GAT)


 66
F137W


 67
I152V


 68
N55L


 69
N150S


 70
L138L


 71
P149P


 72
G161G


 73
A165T


 74
H163R


 75
H163K


 76
H168A


 77
E171S


 78
E171R


 79
E171R


 80
T172I


 81
C176G


 82
A177S


 83
A177S


 84
S80L; R156W


 85
H182G


 86
N186S


 87
K185R


 88
K185T


 89
D2H


 90
D2T; E260G


 91
D2Y


 92
D2G


 93
D2Q


 94
D2F


 95
D2A


 96
D2T


 97
D2N


 98
D2R


 99
D2I


100
D2V; G9A


101
G12A


102
D47W


103
S56S


104
I64H


105
L66L


106
I64C


107
L66G


108
E69Y


109
T74L


110
K73L


111
T74V


112
T74M


113
T74R


114
T74A


115
N76C


116
E77R


117
R156A


118
K72M


119
S205A


120
Q209S


121
V212E


122
R213W


123
I216T


124
P217H


125
P217V


126
D219F


127
E220V


128
R221E


129
F223C


130
S226P


131
L228F


132
V234A


133
S238S


134
V236T


135
V236T


136
T241R


137
L242F


138
T241R


139
T241C


140
E248F


141
D250E


142
K257V


143
G256K


144
E260G


145
L262R


146
K263M


147
D267G


148
D267R


149
I265L


150
E268S


151
L270S


152
L270G


153
L270W


154
R271S


155
I274W


156
G278S


157
Y279C


158
S284R


159
E282G


160
T280N


161
V286G


162
R285F


163
V286R


164
G240G


165
E61R


166
E61D


167
E61Y


168
G85G


169
G85D


170
S80R


171
Y79R


172
Y79V


173
W283V


174
W283E


175
W283A


176
W283S


177
W283G


178
W283A


179
W283R


180
W283T


181
P281W


 182*
V236T; T241R





*Mutant 182 was created using site-directed mutagenesis, using Mutant 136 DNA as a template and then introducing the V236T mutation. One skilled in the art can synthesize this gene using site-directed mutagenesis techniques.






Samples listed in Table 46 were then prepared for the tertiary screen. Glycerol stocks were used to inoculate 5 mL of LB containing 100 μg/mL carbenicillin. Cultures were grown overnight at 37° C. The overnight cultures were then used to inoculate 50 mL cultures of LB containing 100 μg/mL carbenicillin in 250 mL baffled flasks to OD600nm of 0.05. IPTG was added to a final concentration of 1 mM when the OD600nm reached 0.4-0.8. Cultures were induced overnight at 30° C. Cell pellets were harvested by centrifugation at 6,000 rpm for 20 minutes. Cell pellets were frozen at −20° C. until cell lysates could be prepared. Cells were lysed with BPER II (Thermo Scientific, Rockford, Ill.) on ice for 1 hour. Clarified lysates were prepared by centrifugation at 12,000 rpm for 30 minutes.
Protein was quantified by Bio-Rad Bradford Protein Assay (Bio-Rad, Hercules, Calif.) per the manufacturer's instructions. SDS-PAGE analysis and densitometry were used to determine the amount of expressed D-aminotransferase. Samples were normalized for expressed D-aminotransferase. 0.02 mg/mL D-aminotransferase was tested in the tertiary screen. The tertiary screening method was the same as the secondary screening method except that samples were taken at 0, 5, 10, 15, 30, 60, 120 and 210 minutes to develop a timecourse. Alanine production and monatin consumption values were measured by LC/MS/MS analysis and compared to a standard curve. Samples were compared to the wild type control.
Samples with higher final titers or faster initial rates than the wild type control were identified as hits and are referred to as upmutants. The GSSMSM upmutants identified in the tertiary screen are listed in Table 47. These upmutants are further described in Example 27 below.
Example 27
Enzymatic Activity of Polypeptides Upmutants
This example describes data demonstrating the enzymatic activity of exemplary upmutant polypeptides disclosed herein, e.g., the polypeptides having amino acid sequences described in Table 47. Table 47 shows the activity of the upmutants relative to the wild type control at the 15 minute time point in reactions using 1 mM and 15 mM R,R-Monatin substrate. Relative activity is the amount of alanine produced by the sample divided by the amount of alanine produced by the wild type control.







TABLE 47







Activity of GSSM Upmutants in Tertiary Screen









Activity relative to wild type control



(SEQ ID NO: 220)












Reaction with 1 mM
Reaction with 15 mM


Mutant
Mutation
monatin substrate
monatin substrate













23
V42M
1.28
1.04


24
G41Y
1.37
1.31


27
V93G
1.73
1.98


31
P20S
1.29
1.60


35
V93L
1.14
0.96


40
N118G
2.61
1.52


44
N118R
1.55
0.47


45
N110A; N118G
2.50
2.02


46
N118A
2.28
0.69


48
P117W; N118K
2.54
1.12


58
L129V
1.04
0.85


66
F137W
1.25
1.44


67
I152V
1.19
1.24


81
C176G
1.11
1.27


82
A177S
1.24
1.02


104
I64H
1.37
1.07


109
T74L
1.37
1.31


110
K73L
2.83
3.75


111
T74V
1.99
2.19


112
T74M
1.78
2.01


135
V236T
3.44
2.88


136
T241R
2.64
1.79


152
L270G
1.24
0.89


153
L270W
2.00
1.54


174
W283E
1.23
0.84


175
W283A
1.61
1.09


177
W283G
1.71
1.06


6
Y6L
2.52
2.21


88
K185T
1.04
0.95


107
L66G
1.08
1.02









Several samples were identified that outperformed the wild type control under the conditions tested. Potential Km and Vmax upmutants were identified. These results indicate that the wild type control (SEQ ID NO:220) is further evolvable for increased specific D-aminotransferase activity on monatin.
Example 28
Activity of GSSMSM Mutants in Monatin Process
Analysis of GSSM DATs in pSE420-C-His
This example describes data demonstrating the enzymatic activity of exemplary polypeptides disclosed herein. Mutant 27, Mutant 44, Mutant 58, Mutant 119, Mutant 135, Mutant 136, Mutant 152, Mutant 154 and the wild type control (in vector pSE420-C-His in E. coli XL1-Blue, as described in Examples 25 and 26) were streaked onto agar plates containing LB medium with ampicillin (100 μg/mL). Single colonies were used to inoculate 5 mL of LB medium containing ampicillin (100 μg/mL). Five hundred μl were used to inoculate 50 mL of the same medium in a 250 mL baffled flask. The cells were grown at 30° C. to approximately an OD600nm of 0.4. IPTG was added to a final concentration of 1 mM. Cells were grown at 30° C. for 4 hours and collected by centrifugation. Cells were immediately frozen at −80° C. until cell extracts were prepared.
Cell extracts were prepared as described in Example 4. Protein concentrations were determined using the BCA (Pierce, Rockford, Ill.) microtiter plate assay with BSA (Pierce Rockford, Ill.) as the standard, per the manufacturer's instructions. To estimate the concentration of the D-aminotransferase in the cell-free extracts, SDS-PAGE analysis was done and visual estimation was used to estimate percentage of expression. The DAT proteins were soluble in the range of 10-25% expression as percentage of total protein and this was used to calculate the dosage of the assays.
An R,R monatin formation assay was performed containing 100 mM EPPS buffer pH 7.8, 1 mM MgCl2, 0.05 mM PLP, 200 mM sodium pyruvate, 10 mM potassium phosphate, 0.01% Tween-80 with 0.1 mg/mL aldolase and 0.2 mg/mL of DAT in a 4 mL reaction at room temperature. Mutant 27 used 0.15 mg/mL of DAT enzyme instead of 0.2 mg/mL. After 0.5, 1, 2, 4 and 23 hours, an aliquot was taken, formic acid was added to a final concentration of 2%, and the samples spun and filtered. Samples were analyzed for monatin using the LC/MS/MS methodology described in Example 36. Results are shown in Table 48.







TABLE 48







Activity of DATs (cloned into pSE420-C-His)












Monatin
Monatin





(mM)
(mM)
Monatin (mM)
Monatin (mM)


DAT polypeptide
0.5 hr
1 hr
2 hr
4 hr














wild type control
2.12
5.26
9.34
13.05


Mutant 27
4.74
9.55
14.72
18.06


Mutant 44
3.73
6.61
10.38
13.23


Mutant 58
3.61
7.51
11.85
14.56


Mutant 135
3.50
7.72
12.50
16.17


Mutant 136
1.40
4.63
6.59
—


Mutant 152
4.79
9.19
13.08
14.85


Mutant 154
3.76
7.66
11.85
14.38









As can be seen from the data shown in Table 48, a number of DAT mutants obtained through GS SMSM evolution showed improved initial rates of monatin formation over the wild type control under the conditions of the assay.
Analysis of GSSMSM DATs in pMet1a
This example describes data demonstrating the enzymatic activity of exemplary polypeptides disclosed herein. Mutant 2, Mutant 6, Mutant 11, Mutant 27, Mutant 40, Mutant 44, Mutant 45, Mutant 58, Mutant 110, Mutant 135, and Mutant 136 were recreated by site directed mutagenesis using QuikChange Multi Site-Directed Mutagenesis Kit (Stratagene, La Jolla, Calif.) according to the manufacturer's instructions. To generate the mutants, the pMET1a tagged construct described in Example 16 (pMET1a:SEQ ID NO:220(WT)) was used as the template. The mutagenic primers used are listed below in Table 49. The PCR fragments were digested with Dpn1 (Invitrogen, Carlsbad, Calif.) for 1 hour and transformed into E. coli Top10 cells (Invitrogen, Carlsbad, Calif.). The resultant purified plasmid preparations were sequenced (Agencourt, Beverly, Mass.) to verify that the correct mutations were incorporated. The plasmids were then transformed into E. coli B834(DE3) expression host (Novagen, San Diego, Calif.).







TABLE 49 







Primers for Mutagenesis








Mutant










produced
PCR primers
Template





Mutant 2
5′-ATG GAC GCA CTG GGA TGT TAC AAC GGA AAT TGG-3′
SEQ ID



(SEQ ID NO: 1084)
NO: 220



5′-CCA ATT TCC GTT GTA ACA TCC CAG TGC GTC CAT-3′




(SEQ ID NO: 1085)



 


Mutant 6
5′-ATG GAC GCA CTG GGA CTT TAC AAC GGA AAT TGG
SEQ ID



GGG-3′ (SEQ ID NO: 1086)
NO: 220



5′-CCC CCA ATT TCC GTT GTA AAG TCC CAG TGC GTC




CAT-3′ (SEQ ID NO: 1087)



 


Mutant
5′-TAC CTG GTT TAT TGG CAG GGT ACT CGC GGA ACA
SEQ ID


27
GGC CGG-3′ (SEQ ID NO: 1088)
NO: 220



5′-CCG GCC TGT TCC GCG AGT ACC CTG CCA ATA AAC




CAG GTA-3′ (SEQ ID NO: 1089)



 


Mutant
5′-CTC TGG ATT ATA ATT AAG CCC GGC CAC ATC GAC
SEQ ID


40
AAT CTT TAT AG-3′ (SEQ ID NO: 1090)
NO: 220



5′-CTA TAA AGA TTG TCG ATG TGG CCG GGC TTA ATT




ATA ATC CAG AG-3′ (SEQ ID NO: 1091)



 


Mutant
5′-CTC TGG ATT ATA ATT AAG CCC AGG CAC ATC GAC
SEQ ID


44
AAT CTT TAT AG-3′ (SEQ ID NO: 1092)
NO: 220



5′-CTA TAA AGA TTG TCG ATG TGC CTG GGC TTA ATT




ATA ATC CAG AG-3′ (SEQ ID NO: 1093)



 


Mutant
5′-GTA TTT CCG GCA GGC CCT TCA GCG CTC TGG ATT ATA
Mutant


45
ATT AAG CC-3′ (SEQ ID NO: 1094)
40



5′-GGC TTA ATT ATA ATC CAG AGC GCT GAA GGG CCT




GCC GGA AAT AC-3′ (SEQ ID NO: 1095)



 


Mutant
5′-CAA TCT TTA TAG AAA AAT CAA GGT TAT TAC CAT
SEQ ID


58
GGA TGA TAC CCG C 3′ (SEQ ID NO: 1096)
NO: 220



5′-GCG GGT ATG ATC CAT GGT AAT AAC CTT GAT TTT TCT




ATA AAG ATT G-3′ (SEQ ID NO: 1097)



 


Mutant
5′-CTT AAC AAA AGA GGA ATT GAA ACT GAC TTT AAA
SEQ ID


110
TGA AAT GTA CTC C-3′ (SEQ ID NO: 1098)
NO: 220



5′-GGA GTA CAT TTC ATT TAA AGT CAG TTT CAA TTC CTC




TTT TGT TAA G-3′ (SEQ ID NO: 1099)



 


Mutant
5′-TTC GAC GCG GAC GAG GTG CTT ACT TCC AGC AGC
SEQ ID


135
GGC ACA CTC G-3′ (SEQ ID NO: 1100)
NO: 220



5′-CGA GTG TGC CGC TGC TGG AAG TAA GCA CCT CGT




CCG CGT CGA A-3′ (SEQ ID NO: 1101)



 


Mutant
5′-TGC TTG TGT CCA GCA GCG GCC GGC TCG GCC TTA
SEQ ID


136
GCG CCG-3′ (SEQ ID NO: 1102)
NO: 220



5′-CGG CGC TAA GGC CGA GCC GGC CGC TGC TGG ACA




CAA GCA-3′ (SEQ ID NO: 1103)









Mutant 2, Mutant 6, Mutant 27, Mutant 40, Mutant 45, Mutant 58, Mutant 110, Mutant 119, Mutant 131, Mutant 135, Mutant 136, Mutant 152, Mutant 154 were generated in the pMET1a vector and transformed into the compatible E. coli expression host B834(DE3) (Novagen, San Diego, Ca) described in Example 2. Overnight cultures in LB medium containing carbenicillin (100 μg/mL) were diluted 1:100 in 100 mL of the same medium and grown in a 500 mL baffled flask. The culture was grown at 30° C. overnight to an OD600nm of 10 in Overnight Express II medium (Solution 1-6, Novagen). Samples for total protein were taken immediately prior to harvesting. Cells were harvested by centrifugation and washed once with 10 mL of potassium phosphate buffer pH 7.8. Cells were immediately frozen at −80° C. until cell extracts were prepared. It is noted that, in addition to site-directed mutagenesis, one skilled in the art can synthesize the genes encoding these D-aminotransferases using multi-change mutagenesis PCR techniques such as those described in Example 25.
Cell extracts were prepared and desalted as described in Example 4 using 100 mM potassium phosphate as the buffer to elute and equilibrate the PD10 column. Total protein and DAT concentrations were determined as described.
Transamination of R,R monatin with pyruvate as the amino acceptor were performed as described in Example 5 except that 15 mM R,R monatin was utilized. Initial analyses of alanine, monatin, and monatin precursor levels identified Mutant 40, Mutant 135 and Mutant 136 as superior mutants resulting in the highest levels of alanine production as shown in Table 50. DAT Mutant 136 appeared to have the highest activity for conversion of R,R monatin to R-MP. The alanine production numbers (in mM) for the various time points are shown in Table 50.







TABLE 50







Alanine formation (mM) from R,R monatin transamination reactions


from DATs cloned into pMET1a













Alanine
Alanine
Alanine


DAT
Alanine (mM)
(mM)
(mM)
(mM)


polypeptide
15 minutes
30 minutes
60 minutes
120 minutes














wild type
3.08
5.47
8.19
10.07


control


Mutant 2
3.38
5.74
8.85
10.52


Mutant 6
3.51
5.97
8.99
10.81


Mutant 27
4.36
8.00
10.72
10.52


Mutant 40
7.89
10.37
11.79
12.50


Mutant 44
2.65
4.58
7.18
—


Mutant 58
3.90
6.95
9.93
10.52


Mutant 110
3.50
6.17
9.53
10.52


Mutant 135
5.35
8.64
10.82
10.91


Mutant 136
6.24
9.46
11.24
11.15


Mutant 152
4.26
7.12
9.83
10.32


Mutant 154
4.16
7.13
10.07
10.76





—: not determined under present conditions






To further assess activity, a monatin formation assay was done as described in Example 1 with a DAT concentration of approximately 0.2 mg/mL. As a control, 0.2 mg/mL concentration of purified wild type DAT was evaluated. After 0.5, 1, 2, and 4 hrs, an aliquot was taken and formic acid was added to a final concentration of 2%, and the samples were spun and filtered. Samples were analyzed for monatin using the LC/MS/MS methodology described herein and for tryptophan and alanine using the LC/OPA post-column fluorescence methodology described in Example 36.







TABLE 51







Activity of DATs in pMET1a












Monatin

Monatin




(mM)
Monatin (mM)
(mM)
Monatin (mM)


DAT polypeptide
0.50 hr
1.00 hr
2.00 hr
4.00 hr














wild type control
3.96
7.83
9.70
11.18


Mutant 2
1.56
3.78
8.77
12.68


Mutant 27
4.70
9.70
n.d.
13.80


Mutant 44
3.03
5.61
8.50
12.28


Mutant 45
1.40
4.00
7.70
11.50


Mutant 58
3.83
7.23
11.33
14.12


Mutant 110
2.60
5.90
9.90
12.70


Mutant 119
4.12
7.87
11.37
13.50


Mutant 131
3.75
7.41
11.40
13.90


Mutant 135
6.39
10.65
13.49
13.15


Mutant 136
3.36
8.02
12.86
13.16


Mutant 154
3.00
6.06
10.67
13.17









All the DATs shown in Table 51 produced monatin. DAT mutants Mutant 58, Mutant 135 and Mutant 136 had faster initial rates than the wild type control. Mutant 136 was slower for reaction one (conversion of D-Trp to I3P) but had better overall monatin production than the wild type control.
For the final time point, an additional aliquot was taken (without the addition of formic acid) to determine the stereoisomeric distribution of the monatin produced using the FDAA derivatization methodology described in Example 36. For the select mutants tested, there was little to no impact on stereopurity. In all cases, the mutants produced over 98.8% R,R under the assay conditions tested. These results are shown in Table 52.







TABLE 52







Stereopurities of Monatin Produced by Select Mutants at 4 hours













DAT polypeptide
% SS
% RS
% RR
% SR







wild type (pMet1a)
0.00
0.40
99.30
0.20



control



Mutant 6
0.00
0.40
99.50
0.10



Mutant 27
0.00
0.80
98.80
0.30



Mutant 40
0.00
0.20
99.80
0.00



Mutant 45
0.00
0.50
99.40
0.10



Mutant 110
0.10
0.40
99.30
0.10



Mutant 135
0.00
0.40
99.50
0.10



Mutant 136
0.02
1.00
99.00
0.03










Example 29
Construction and Testing of Tailored Multi-Site Combinatorial Assembly (TMCASM) Mutants
This example describes the construction of exemplary nucleic acids and polypeptides, and describes their enzymatic activity. A subset of GSSM mutations were selected for combination using Tailored Multi-Site Combinatorial AssemblySM (TMCASM) technology. The top ten performers from the GSSM evolution in either the 1 or 15 mM monatin reactions were selected for TMCASM evolution. The wild-type sequence (SEQ ID NO:220) was threaded onto a model of 3DAA-D-amino acid aminotransferase (FIG. 8). The model in FIG. 8 is shown with pyridoxyl-5′-phosphate D-alanine, with the numbered residues indicating those sites selected for TMCASM evolution. Table 53 also lists the mutations that were selected for inclusion in the TMCA library. TMCA evolution was performed on wild type (SEQ ID NO:220) and Mutant 45 using the methods described in PCT Application No. PCT/US08/071771.
TMCA evolution is described in PCT Application Number PCT/US08/071771 and comprises a method for producing a plurality of progeny polynucleotides having different combinations of various mutations at multiple sites. The method can be performed, in part, by a combination of at least one or more of the following steps:
Obtaining Sequence Information of a (“First” or “Template”) Polynucleotide.
For example, the first or template sequence can be a wild type (e.g. SEQ ID NO:220) or mutated (e.g. Mutant 45) sequence. The sequence information can be of the complete polynucleotide (e.g., a gene or an open reading frame) or of partial regions of interest, such as a sequence encoding a site for binding, binding-specificity, catalysis, or substrate-specificity.
Identifying Three or More Mutations of Interest Along the First or Template Polynucleotide Sequence.
For example, mutations can be at 3, 4, 5, 6, 8, 10, 12, 20 or more positions within the first or template sequence. The positions can be predetermined by absolute position or by the context of surrounding residues or homology. For TMCA of DAT polypeptides, the top 10 codon changes that resulted in improved enzyme performance were included as mutations of interest. The sequences flanking the mutation positions on either side can be known. Each mutation position may contain two or more mutations, such as for different amino acids. Such mutations can be identified by using Gene Site Saturation MutagenesisSM (GSSM SM) technology, as described herein and in U.S. Pat. Nos. 6,171,820; 6,562,594; and 6,764,835.
Providing Primers (e.g., Synthetic Oligonucleotides) Comprising the Mutations of Interest.
In one embodiment, a primer is provided for each mutation of interest. Thus, a first or template polynucleotide having 3 mutations of interest can use 3 primers at that position. The primer also can be provided as a pool of primers containing a degenerate position so that the mutation of interest is the range of any nucleotide or naturally occurring amino acid, or a subset of that range. For example, a pool of primers can be provided that favor mutations for aliphatic amino acid residues.
The primers can be prepared as forward or reverse primers, or the primers can be prepared as at least one forward primer and at least one reverse primer. When mutations are positioned closely together, it can be convenient to use primers that contain mutations for more than one position or different combinations of mutations at multiple positions.
Providing a Polynucleotide Containing the Template Sequence.
The first or template polynucleotide can be circular, or can be supercoiled, such as a plasmid or vector for cloning, sequencing or expression. The polynucleotide may be single-stranded (“ssDNA”), or can be double-stranded (“dsDNA”). For example, the TCMA method subjects the supercoiled (“sc”) dsDNA template to a heating step at 95° C. for 1 min (see Levy, Nucleic Acid Res., 28(12):e57(i-vii) (2000)).
Adding the Primers to the Template Polynucleotide in a Reaction Mixture.
The primers and the template polynucleotide are combined under conditions that allow the primers to anneal to the template polynucleotide. In one embodiment of the TMCA protocol, the primers are added to the polynucleotide in a single reaction mixture, but can be added in multiple reactions.
Performing a Polymerase Extension Reactions.
The extension products (e.g., as a “progeny” or “modified extended polynucleotide”) may be amplified by conventional means. The products may be analyzed for length, sequence, desired nucleic acid properties, or expressed as polypeptides. Other analysis methods include in-situ hybridization, sequence screening or expression screening. The analysis can include one or more rounds of screening and selecting for a desired property.
The products can also be transformed into a cell or other expression system, such as a cell-free system. The cell-free system may contain enzymes related to DNA replication, repair, recombination, transcription, or for translation. Exemplary hosts include bacterial, yeast, plant and animal cells and cell lines, and include E. coli, Pseudomonas fluorescens, Pichia pastoris and Aspergillus niger. For example, XL1-Blue or Stb12 strains of E. coli can be used as hosts.
The method of the invention may be used with the same or different primers under different reaction conditions to promote products having different combinations or numbers of mutations.
By performing the exemplary method described above, this protocol also provides one or more polynucleotides produced by this TMCA evolution method, which then can be screened or selected for a desired property. One or more of the progeny polynucleotides can be expressed as polypeptides, and optionally screened or selected for a desired property. Thus, this embodiment of the TMCA evolution protocol provides polynucleotides and the encoded polypeptides, as well as libraries of such polynucleotides encoding such polypeptides. This embodiment of the TMCA evolution protocol further provides for screening the libraries by screening or selecting the library to obtain one or more polynucleotides encoding one or more polypeptides having the desired activity.
Another embodiment of the TMCA evolution protocol described in PCT/US08/071771 comprises a method of producing a plurality of modified polynucleotides. Such methods generally include (a) adding at least three primers to a double stranded template polynucleotide in a single reaction mixture, wherein the at least three primers are not overlapping, and wherein each of the at least three primers comprise at least one mutation different from the other primers, wherein at least one primer is a forward primer that can anneal to a minus strand of the template and at least one primer is a reverse primer that can anneal to a plus strand of the template, and (b) subjecting the reaction mixture to a polymerase extension reaction to yield a plurality of extended modified polynucleotides from the at least three primers.
Another embodiment of the TMCA evolution protocol described in PCT/US08/071771 comprises a method wherein a cell is transformed with the plurality of extended products that have not been treated with a ligase. In another embodiment of the invention, the plurality of extended modified polynucleotides is recovered from the cell. In another embodiment, the recovered plurality of extended modified polynucleotides is analyzed, for example, by expressing at least one of the plurality of extended modified polynucleotides and analyzing the polypeptide expressed therefrom. In another embodiment, the plurality of extended modified polynucleotides comprising the mutations of interest is selected.
In another embodiment of the TMCA evolution protocol, sequence information regarding the template polynucleotide is obtained, and three or more mutations of interest along the template polynucleotide can be identified. In another embodiment, products obtained by the polymerase extension can be analyzed before transforming the plurality of extended modified products into a cell.
In one embodiment of the TMCA evolution protocol, products obtained by the polymerase extension are treated with an enzyme, e.g., a restriction enzyme, such as a DpnI restriction enzyme, thereby destroying the template polynucleotide sequence. The treated products can be transformed into a cell, e.g., an E. coli cell.
In one embodiment of the TMCA evolution protocol, at least two, or at least three, or at least four, or at least five, or at least six, or at least seven, or at least eight, or at least nine, or at least ten, or at least eleven, or at least twelve, or more primers can be used. In one embodiment, each primer comprises a single point mutation. In another embodiment, two forward or two reverse primers comprise a different change in the same position on the template polynucleotide. In another embodiment, at least one primer comprises at least two changes in different positions on the template polynucleotide. In yet another embodiment, at least one primer comprises at least two changes in different positions and at least two forward or two reverse primers comprise a different change in the same position on the template polynucleotide.
In one embodiment of the TMCA evolution protocol, the forward primers are grouped into a forward group and the reverse primers are grouped into a reverse group, and the primers in the forward group and the primers in the reverse group, independent of one another, are normalized to be equal concentration in the corresponding group regardless of positions on the template polynucleotide, and wherein after the normalization an equal amount of the forward and reverse primers is added to the reaction. In this normalization method, a combination of some positions may be biased. The bias can be due to, for example, a relatively low primer concentration at one position containing a single primer compared to a position containing multiple primers. “Positional bias” refers to resulting polynucleotides which show a strong preference for the incorporation of primers at a single position relative to the other positions within its forward or reverse primer group. This results in a combination of modified polynucleotides which may have a high percentage of mutations within a single primer position but a low percentage of mutations at another position within its forward or reverse primer group. This bias is unfavorable when the goal of the TMCA is to generate progeny polynucleotides comprising all possible combinations of changes to the template. The bias can be corrected, for example, by normalizing the primers as a pool at each position to be equal.
In one embodiment of the TMCA evolution protocol, the primer normalization is performed by organizing the primers into multiple groups depending on their location on the template polynucleotide, wherein the primers covering the same selected region on the template are in one group; normalizing the grouped primers within each group to be equal concentration; pooling the forward primers within one group into a forward group and normalizing concentration between each group of the forward primers to be equal; pooling the reverse primers within one group into a reverse group and normalizing concentration between each group of the reverse primers to be equal; and adding an equal amount of the pooled forward and reversed primers into the reaction. No bias has been observed for position combinations.
In one embodiment of the TMCA evolution protocol, a set of degenerate primers each comprising a degenerate position is provided, wherein the mutation of interest is a range of different nucleotides at the degenerate position. In another embodiment, a set of degenerate primers is provided comprising at least one degenerate codon corresponding to at least one codon of the template polynucleotide and at least one adjacent sequence that is homologous to a sequence adjacent to the codon of the template polynucleotide sequence. In another embodiment, the degenerated codon is N,N,N and encodes any of 20 naturally occurring amino acids. In another embodiment, the degenerated codon encodes less than 20 naturally occurring amino acids.
Another embodiment of the TMCA evolution protocol described in PCT/US08/071771 comprises a method of producing a plurality of modified polynucleotides comprising the mutations of interest. Such methods generally include (a) adding at least two primers to a double stranded template polynucleotide in a single reaction mixture, wherein the at least two primers are not overlapping, and wherein each of the at least two primers comprise at least one mutation different from the other primer(s), wherein at least one primer is a forward primer that can anneal to a minus strand of the template and at least one primer is a reverse primer that can anneal to a plus strand of the template, (b) subjecting the reaction mixture to a polymerase extension reaction to yield a plurality of extended modified polynucleotides from the at least two primers, (c) treating the plurality of extended modified polynucleotides with an enzyme, thereby destroying the template polynucleotide, (d) transforming the treated extended modified polynucleotides that have not been treated with a ligase into a cell, (e) recovering the plurality of extended modified polynucleotides from the cell, and (f) selecting the plurality of extended modified polynucleotides comprising the mutations of interest.







TABLE 53







List of Sites for TMCA evolution










Mutation
New Codon







P20S
AGT



K73L
TTG



T74V
GTG



V93G
GGT



N110A
GCT



P117W
TGG



N118G
GGG



N118A
GCG



V236T
ACT



T241R
CGG



L270W
TGG










TMCA mutants were grown, arrayed, assayed and sequenced using the same method as described for the GSSM evolution in Example 25. Sample performance was compared to the performance of the top candidate from GSSM evolution—Mutant 135—using the same scoring system as described in Example 25. Table 55 lists the TMCA secondary screen hits with unique DNA sequences (TMCA mutants are designated with alphabetic characters to distinguish them from GSSM mutants, which are designated numerically).







TABLE 55







TMCA Mutants Identified as Secondary Screen Hits










Mutant




name
Mutation







A
P20S-N118G



B
T74V-V93G-L270W



C
P20S-T74V-L270W



D
T74V-L270W



E
P20S-K73L-T241R-L270W



F
K73L-V93G-V236T-T241R



G
P20S-T74V-V236T



H
P20S-K73L-V93G



I
K73L-V236T



J
P20S-L270W



K
2N-P20S-K73L-V93G-N118G



L
P20S-T74V-N118A



M
P20S-V236T



N
P20S-T241R-L270W



O
P20S-T241R



P
T74V-V93G-V236T-T241R



Q
P20S-K73L-T74V-L270W



R
P20S-V93G-V236T



S
P20S-K73L-T74V-T241R-L270W



T
P20S-K73L-L270W



U
T74V-V93G-N118G-V236T-T241R



V
P20S-K73L-210A (SILENT-GCC




→ GCT)-V236T



W
N118A-L270W



X
P20S-58K (SILENT AAG →




AAA)-L270W



Y
P20S-V93G-N118G



Z
P20S-V236T-T241R



AA
P20S-P117W-N118A-V236T-




L270W



BB
V93G-V236T



CC
V236T-L270W



DD
P20S-N118G-L270W



EE
P20S-N110A-N118G



FF
N110A-N118G-T241R-L270W



GG
P20S-T74V-V93G-N110A-N118G-




V236T-L270W



HH
V93G-N110A-N118G-V236T



II
P20S-T74V-N110A-N118G



JJ
N110A-N118G



KK
P20S-V93G-N110A-N118G-T241R



LL
N110A-N118A-L270W



MM
P20S-N110A-N118G-L270W



NN
N110A-N118A-V236T-T241R



OO
N110A-N118G-L270W



PP
V93G-N110A-N118G-T241R



QQ
P20S-V93G-N110A-N118G



RR
V93G-N110A



SS
P20S-N110A-N118G-V236T



TT
T74V-N110A-N118A-V236T



UU
P20S-K73L-T74V-N110A-N118G-




V236T-T241R



VV
86E (SILENT GAG → GAA)-




N110A-N118A-V236T



WW
T74V-N118G



XX
P20S-T241R-L270W-277T




(SILENT ACA → ACG)



YY
T74V-N118A-L270W



ZZ
P20S-K73L-N118A-L270W



AAA
P20S-V93G-T241R



BBB
T74V-V93G-N110A-T241R



CCC
V93G-N110A-N118A



DDD
P20S-T74V-V93G-N110A-N118G-




T241R



EEE
T74V-N110A-N118G-L270W



FFF
P20S-231A (SILENT GCG →




GCA)-V236T



GGG
V93G-V236T-T241R










The samples identified in Table 55 were grown, normalized and assayed in the tertiary screen using the same method as described for the GSSM evolution in Example 26. Monatin and alanine values were determined by LC/MS/MS and compared to a standard curve. Sample performance was compared to the activity of Mutant 135 (the top performer from GSSM evolution). TMCA upmutants identified in the tertiary screen are listed in Table 56.
Example 31
Activity of TMCA Hits
This example describes data demonstrating the enzymatic activity of exemplary polypeptides. Table 56 below shows the activity of the upmutants relative to Mutant 135 at the 15 minute time point in reactions using 1 mM and 15 mM R,R-monatin substrate. Relative activity is the amount of alanine produced by the sample divided by the amount of alanine produced by Mutant 135.







TABLE 56







Activity of TMCA Upmutants in Tertiary Screen









Activity relative to GSSM



Mutant 135












Reactions
Reactions




with 1 mM
with 15 mM




monatin
monatin


Mutant
Mutation
substrate
substrate





C
P20S-T74V-L270W
1.02
0.93


E
P20S-K73L-T241R-L270W
1.32
1.31


F
K73L-V93G-V236T-T241R
1.29
0.64


G
P20S-T74V-V236T
1.28
1.30


I
K73L-V236T
1.24
1.29


J
P20S-L270W
0.79
1.01


L
P20S-T74V-N118A
1.62
0.83


M
P20S-V236T
1.27
1.46


O
P20S-T241R
1.33
1.71


R
P20S-V93G-V236T
1.22
1.02


S
P20S-K73L-T74V-T241R-L270W
1.16
1.18


V
P20S-K73L-210A (SILENT-
1.03
1.00



GCC → GCT)-V236T


Z
P20S-V236T-T241R
1.02
0.89


BB
V93G-V236T
1.55
1.98


CC
V236T-L270W
1.24
1.40


DD
P20S-N118G-L270W
1.54
1.78


PP
V93G-N110A-N118G-T241R
1.40
1.53


TT
T74V-N110A-N118A-V236T
1.10
0.42


VV
86E (SILENT GAG → GAA)-
1.31
0.52



N110A-N118A-V236T


WW
T74V-N118G
1.23
1.49


YY
T74V-N118A-L270W
1.97
1.30


ZZ
P20S-K73L-N118A-L270W
1.01
0.44


AAA
P20S-V93G-T241R
1.86
3.49


CCC
V93G-N110A-N118A
1.26
0.56









Several samples were identified that outperformed Mutant 135 under the conditions tested. Potential Km and Vmax upmutants were identified. The results of the GSSM and TMCA evolutions indicate that wild type SEQ ID NO:220 is further evolvable for increased specific activity on monatin.
Example 32
Evaluation of TMCA Mutant DATs in pMET1a
This example describes data demonstrating the enzymatic activity of exemplary polypeptides disclosed herein. Mutant E, Mutant G, Mutant I, Mutant M, Mutant O, Mutant P, Mutant BB, Mutant PP, Mutant WW, and Mutant AAA (DATs created using TMCA technology, see Examples 29 and 30) were recreated by site-directed mutagenesis using QuikChange Multi Site-Directed Mutagenesis Kit (Stratagene, La Jolla, Calif.) according to the manufacturer's instructions. To generate the mutants, pMET1a tagged constructs described in Example 16 and Example 28 were used as templates. The mutagenic primers used are listed below in Table 57. The PCR fragments were digested with Dpn1 (Invitrogen, Carlsbad, Calif.) for 1 hour and transformed into E. coli XL10-Gold cells (Stratagene, La Jolla, Calif.). The resultant purified plasmid preparations were sequenced (Agencourt, Beverly, Mass.) to verify that the correct mutations were incorporated. The plasmids were then transformed into E. coli B834(DE3) expression host (Novagen, San Diego, Calif.).







TABLE 57 







Primers for Mutants in pMET1a Vector









TMCA




mutant




polypeptide




produced
PCR primers
Template












Mutant E
5′-CTG GAC GAG ATG ACT GTG AGT ATG AAC GAC AGG
Mutant



GGC TGC TAC-3′ (SEQ ID NO: 1104)
110



5′-TGC TTG TGT CCA GCA GCG GCC GGC TCG GCC TTA




GCG CCG-3′ (SEQ ID NO: 1105)




5′CTA AAA AAA ATC CAG GAT GAA GTG TGG AGG GAA




TTT ATC GAA GCG ACA GG3′ (SEQ ID NO: 1106)



 


Mutant G
5′-CAA AAG AGG AAT TGA AAA AAG TGT TAA ATG AAA
Mutant



TGT ACT CC-3′ (SEQ ID NO: 1107)
M



5′-GGA GTA CAT TTC ATT TAA CAC TTT TTT CAA TTC




CTC TTT TG-3′ (SEQ ID NO: 1108)



 


Mutant I
5′-CTT AAC AAA AGA GGA ATT GAA ACT GAC TTT AAA
Mutant



TGA AAT GTA CTC C-3′ (SEQ ID NO: 1109)
135



5′-GGA GTA CAT TTC ATT TAA AGT CAG TTT CAA TTC




CTC TTT TGT TAA G-3′ (SEQ ID NO: 1110)



 


Mutant M
5′-CTG GAC GAG ATG ACT GTG AGT ATG AAC GAC AGG
Mutant



GGC TGC TAC-3′ (SEQ ID NO: 1111)
135



5′-GTA GCA GCC CCT GTC GTT CAT ACT CAC AGT CAT




CTC GTC CAG-3′ (SEQ ID NO: 1112)



 


Mutant O
5′-CTG GAC GAG ATG ACT GTG AGT ATG AAC GAC AGG
Mutant



GGC TGC TAC-3′ (SEQ ID NO: 1113)
136



5′-GTA GCA GCC CCT GTC GTT CAT ACT CAC AGT CAT




CTC GTC CAG-3′ (SEQ ID NO: 1114)




5′-CAA AAG AGG AAT TGA AAA AAG TGT TAA ATG AAA




TGT ACT CC-3′ (SEQ ID NO: 1115)



 


Mutant P
5′-TTC GAC GCG GAC GAG GTG CTT ACT TCC AGC AGC
Mutant



GGC ACA CTC G-3′ (SEQ ID NO: 1116)
27



5′-TGC TTG TGT CCA GCA GCG GCC GGC TCG GCC TTA




GCG CCG-3′ (SEQ ID NO: 1117)



 


Mutant BB
5′-TAC CTG GTT TAT TGG CAG GGT ACT CGC GGA ACA
Mutant



GGC CGG-3′ (SEQ ID NO: 1118)
135



5′-CCG GCC TGT TCC GCG AGT ACC CTG CCA ATA AAC




CAG GTA-3′ (SEQ ID NO: 1119)



 


Mutant PP
5′-TAC CTG GTT TAT TGG CAG GGT ACT CGC GGA ACA
Mutant



GGC CGG-3′ (SEQ ID NO: 1120)
45



5′-TGC TTG TGT CCA GCA GCG GCC GGC TCG GCC TTA




GCG CCG-3′ (SEQ ID NO: 1121)



 


Mutant WW
5′-CAA AAG AGG AAT TGA AAA AAG TGT TAA ATG AAA
Mutant



TGT ACT CC-3′ (SEQ ID NO: 1122)
M



5′-GGA GTA CAT TTC ATT TAA CAC TTT TTT CAA TTC




CTC TTT TG-3′ (SEQ ID NO: 1123)



 


Mutant AAA
5′-CTG GAC GAG ATG ACT GTG AGT ATG AAC GAC AGG
Mutant



GGC TGC TAC-3′ (SEQ ID NO: 1124)
27



5′-TGC TTG TGT CCA GCA GCG GCC GGC TCG GCC TTA




GCG CCG-3′ (SEQ ID NO: 1125)









E. coli B834(DE3) (Novagen, San Diego, Calif.) cultures expressing carboxy-terminal His-tagged Mutant 110, Mutant 135, Mutant 136, Mutant E, Mutant G, Mutant I, Mutant M, Mutant O, Mutant P, Mutant BB, Mutant PP, Mutant WW, Mutant AAA and wild type (SEQ ID NO:220) proteins were grown in 200 mL of Overnight Express II medium (Solution 1-6, Novagen) in a 500 mL baffled flask overnight at 30° C. to an OD600 of 10. Samples for total protein were taken immediately prior to harvesting. Cells were harvested by centrifugation and immediately frozen at −80° C. until cell extracts were prepared as described in Example 4.
Cell extracts were created by the addition of 50 mL of Bug Buster Primary Amine Free (Novagen, San Diego, Calif.) with 50 μl of Benzonase Nuclease (Novagen, San Diego, Calif.), 0.75 μl of rLysozyme (Novagen, San Diego, Calif.), and 250 μl of Protease Inhibitor Cocktail II (Calbiochem, San Diego, Calif.). The cells were incubated for 15 minutes at room temperature with gentle rocking. The extracts were centrifuged at 45,000×g for 10 minutes.
His-tagged proteins were purified as described in Example 4 using GE Healthcare (Piscataway, N.J.) Chelating SepharoseTM Fast Flow resin. The exception was Mutant 182, which was analyzed as CFE as described in Example 4. Purified protein was desalted using a PD10 column into 100 mM potassium phosphate, pH 7.8 with 0.050 mM PLP. Total protein and DAT concentrations were determined as described in Example 4.
A 3-step monatin formation assay was done as described in Example 5 with a DAT concentration of approximately 0.2 mg/mL and the aldolase at a concentration of 0.1 mg/mL. As a control, 0.2 mg/mL concentration of purified wild type DAT (SEQ ID NO:220) was evaluated. After 0.5, 1, 2, 4 and 24 hours, an aliquot was taken, formic acid was added to a final concentration of 2% and the samples were spun and filtered. Samples were analyzed for monatin using LC/MS/MS methodology and for tryptophan and alanine using the LC/OPA post-column fluorescence methodology described in Example 36. At the last time point, an additional aliquot was taken (without pH adjustment) to determine % R,R monatin by the FDAA-derivatization method described in Example 36. The amount of monatin (mM) produced at various time points can be found in Table 58. Stereopurity was also determined and the percent of the R,R stereoisomer can be found in the far right hand column. The stereoisomer R,S made up the majority of the balance.







TABLE 58







Activity of Select DAT Mutants













Monatin
Monatin
Monatin
Monatin



DAT
(mM)
(mM)
(mM)
(mM)


polypeptide
0.25 hr
0.5 hr
1 hr
4 hr
% RR





Wild type
1.60 (±0.42)
2.95 (±0.64)
 5.00 (±0.85)
11.40 (±0.42)
99.50 (±0.08)


control (SEQ


ID NO: 220)


Mutant 110
1.70 (±0.00)
3.20 (±0.85)
 5.75 (±0.21)
12.60 (±0.14)
99.48 (±0.32)


Mutant 135
3.65 (±0.35)
6.17 (±0.65)
10.33 (±0.32)
13.20 (±0.56)
99.42 (±0.11)


Mutant 136
2.60
5.00
 8.10
12.90
98.98


Mutant 182
—
3.20
 6.80
14.30
99.50


Mutant E
1.80
3.80
 8.60
18.60
99.45


Mutant G
3.10
6.50
 9.90
12.90
99.05


Mutant I
2.90
5.30
 8.50
12.90
99.46


Mutant M
4.20
8.10
11.20
13.80
98.96


Mutant O
2.60
5.70
 9.50
14.00
98.59


Mutant BB
4.20
8.20
11.40
13.70
98.97


Mutant PP
2.40
3.20
 6.20
17.40
97.25


Mutant AAA
2.80
6.80
11.80
14.80
97.98





— = not determined under conditions tested






The relative rates of monatin production under the conditions tested indicate the greatest improvement in initial activity from Mutant 135, Mutant 136, Mutant E, Mutant G, Mutant M, Mutant O, Mutant BB, and Mutant AAA as determined by comparing the rate of monatin formation with purified protein over the first hour between the mutants and the wild type control (SEQ ID NO:220) DAT. DATs Mutant E and Mutant AAA had high activity but were not well expressed (less than 5% of the total protein) nor very soluble under the conditions tested.
The assay samples were also analyzed for intermediates such as monatin precursor, I3P, and byproduct 4-hydroxy-4-methyl glutmatic acid (HMG) as described in Example 36. The analysis of the amount of HMG formed was determined for the mutants Mutant E, Mutant G, Mutant I, Mutant M, Mutant O, Mutant BB, Mutant PP, Mutant AAA and Mutant 110, Mutant 135, and Mutant 136. It appears that at the 4 hour time point, more HMG were formed by the mutants Mutant 135, Mutant G, Mutant I, Mutant M and Mutant BB. These mutants all contained the change V236T. HMG was also present above the levels of the wild type control (SEQ ID NO:220) with mutants Mutant E, Mutant G, Mutant M and Mutant AAA likely due to the change in residue P20S.







TABLE 59







HMG Formation by DAT Mutants after 4 hours











HMG (mM)



DAT polypeptide
4 hr







Wild type control
nd



(SEQ ID NO: 220)



Mutant 110
nd



Mutant 135
1.0



Mutant 136
nd



Mutant E
0.2



Mutant G
1.6



Mutant I
0.8



Mutant M
1.6



Mutant O
nd



Mutant BB
1.5



Mutant AAA
0.6







nd = not detected






DAT Assay Monitoring I3P Formation

The formation of I3P from tryptophan was detected and monitored at a wavelength of 340 nm. Reactions were carried out in 1 mL reaction volume containing 900 μL of a 25 mM D-tryptophan, 25 mM pyruvic acid sodium salt, 0.05 mM PLP, 100 mM potassium phosphate (pH 7.8) solution combined with 100 μL dilutions of DAT (total protein) prepared as described above. Enzymes were diluted 1:100 and 1:200 with cold 50 mM potassium phosphate (pH 7.8) and 50 μM PLP prior to addition to the assay. Enzyme was added to the reaction mixture 1:100 and monitored in increments of 15 seconds for 3 minutes. The formation of indole-3-pyruvate (I3P) was monitored at a wavelength of 340 nm for 3 minutes on a BioRad Spectrophotometer (GE Healthscience, Piscataway, N.J.) and rates were measured within the dynamic range of a standard curve. The standard curve was generated with purified wild type (SEQ ID NO:220) DAT protein and the concentration of DAT in cell extract was determined based on the equation of the line for the standard curve. The effective concentration of DAT with respect to the wild type DAT for the first reaction is reported in Table 60.







TABLE 60







Activity of DAT (Conversion of Tryptophan to I3P)












Concentration of




Rate of 13P
DAT



formation
(determined by
Activity relative to


DAT
(Δ Abs340 nm/
activity)
wild type for first


Polypeptide
minute)
mg/mL
reaction





Wild type
0.058
0.065
1.0


control (SEQ


ID NO: 220)


Mutant 135
0.067
0.075
1.2


Mutant 136
0.017
0.019
0.3


Mutant E
0.000
0.002
0.1


Mutant G
0.027
0.030
0.5


Mutant M
0.050
0.055
0.9


Mutant O
0.031
0.033
0.8


Mutant BB
0.045
0.050
0.8


Mutant AAA
0.002
0.004
0.2









The wild type DAT (SEQ ID NO:220) and mutants 136, E, G, M, O, BB and AAA can facilitate the conversion of both tryptophan to I3P and of monatin precursor to monatin. Table 60 shows that these mutants had lower activity for the conversion of tryptophan to I3P relative to the wild type DAT (SEQ ID NO:220). Yet, according to Table 58, the same mutants produced more total monatin from tryptophan than did the wild type DAT (SEQ ID NO:220). Thus, under the conditions of the assay described herein, there appears to be a beneficial effect on monatin production through controlling the conversion of tryptophan to I3P in the monatin biosynthetic pathway. For example, although Mutant E showed the lowest relative activity for conversion of tryptophan to I3P (see Table 60), it also produced the highest amount of monatin at 4 hours (see Table 58). Without being bound by theory, the beneficial effects of controlling the first step in the reaction could be attributed to a reduction of I3P buildup and subsequent potential I3P degradation to products other than monatin. Generally, it also appears that controlling the rate of one or more of the reactions involved in the production of monatin from tryptophan, using, for example, one or more mutant DATs, can have a beneficial effect on the total amount of monatin produced.
Example 33
Evaluation of Mutant DATs at 35° C.
This example describes data demonstrating the enzymatic activity of exemplary polypeptides disclosed herein. Starter cultures were grown overnight at 37° C. with shaking at 250 rpm until the OD600nm reached 0.05. 200 mL of Overnight Express II medium (Novagen, San Diego, Calif.) was inoculated and grown as described in Example 3. Cultures were grown in duplicate and the cell pellets were combined. The pellets were resuspended in 40 mL of 50 mM sodium phosphate buffer (pH 7.8) with 0.05 mM PLP and lysed using a French Press (Sim Aminco, Rochester, N.Y.) per the manufacturer's instructions. The supernatant was collected in a clean tube and stored at −80° C. until used.
A 3-step monatin formation assay was performed as described in the methods with a DAT concentration of approximately 0.2 mg/mL and the aldolase at a concentration of 0.1 mg/mL in glass vials. Duplicate samples were incubated at either 25° C. or 35° C. and after 1, 3, and 4 hours, an aliquot was taken and formic acid was added to a final concentration of 2%, and the samples were spun and filtered. Samples were analyzed for monatin using LC/MS/MS methodology and for tryptophan and alanine using the LC/OPA post-column fluorescence methodology described in Example 36. Samples were also analyzed for intermediates such as monatin precursor, I3P, and 4-hydroxy-4-methyl glutmatic acid (HMG) as described in Example 36. The amount of monatin (mM) produced at various time points is shown in Table 61.
The monatin formation assay was repeated for the wild type control (SEQ ID NO:220), Mutant 135 and Mutant M under similar conditions except the reactions were carried out in plastic vials. Monatin production at various time points can be found in Table 61.







TABLE 61







Monatin Formation at 25° C. and 35° C.











Monatin

Monatin



(mM)
Monatin (mM)
(mM)


DAT polypeptide
1 hr
3 hr
4 hr













25° C.





wild type control (pMet1a)
2.0
6.8
8.4


Mutant 135 (V236T)
10.0
14.4
14.2


Mutant 136 (241R)
4.0
10.8
12.4


Mutant E (20S, 73L, 241R, 270W)
0.8
4.2
5.6


Mutant M (20S, 236T)
10.0
13.4
14.2


Mutant O (20S, 241R)
8.0
13.8
13.6


Mutant BB (93G, 236T)
4.0
11.4
12.4


Mutant AAA (20S, 93G, 241R)
0.2
1.0
1.6


35° C.


wild type control (pMet1a)
2.2
5.4
6.2


Mutant 135 (V236T)
9.4
9.2
9.8


Mutant 136 (241R)
4.8
9.4
10.4


Mutant E (20S, 73L, 241R, 270W)
0.6
3.4
4.2


Mutant M (20S, 236T)
9.2
13.6
14.6


Mutant O (20S, 241R)
9.6
10.6
10.8


Mutant BB (93G, 236T)
4.6
9.0
9.2


Mutant AAA (20S, 93G, 241R)
0.2
1.6
2.2









Lower monatin titers were observed using the DAT enzymes described here at 35° C. under the conditions of the assay. However, select mutants Mutant 135, Mutant 136, Mutant M, Mutant 0 and Mutant BB showed increased initial monatin production rates and greater 4 hour monatin titers than the wild type control (SEQ ID N0:220) at 35° C. under the assay conditions.
Example 34
Evaluation of Mutant DATs in BioReactors
This example describes data demonstrating the enzymatic activity of exemplary polypeptides disclosed herein in bioreactors. Glycerol stocks of the wild type control (SEQ ID NO:220), Mutant 135, Mutant 136, Mutant M, Mutant O, and Mutant BB were used to streak plates for single colonies. Single colonies were used to inoculate flasks containing 5 mL of LB medium with the appropriate antibiotic. The starter cultures were grown overnight at 37° C. with shaking at 250 rpm and the OD600nm was checked. When the OD600nm reached 0.05, the 5 mL culture was inoculated into a 200 mL of Overnight Express II medium (Novagen, San Diego, Calif.) and then incubated at 30° C. with shaking at 250 rpm. Each culture was grown in duplicate and the cell pellets were combined. Cultures were harvested by pelleting cells by centrifugation at 4000 rpm for 15 minutes. The supernatant was poured off and the pellet was either frozen for later use or resuspended in 40 mL of 50 mM sodium phosphate buffer (pH 7.8) and lysed using a French Press (Sim Aminco, Rochester, N.Y.) or a microfluidizer (Microfluidics Corporation, Newton, Mass.) per the manufacturer's instructions. The supernatant was collected in a clean tube and stored at −80° C. until used. Approximately 1 mL of the clarified lysate was retained for protein quantitation using the BCA assay (Pierce, Rockford, Ill.) and SDS-PAGE analysis.
Bench scale reactions (250 mL) were carried out in 0.7 L Sixfors agitated fermentors (Infors AG, Bottmingen, Switzerland) under a nitrogen headspace as described in Example 15. The reaction mix contained 10 mM potassium phosphate, 1 mM MgCl2, 0.05 mM PLP, 200 mM sodium pyruvate and 130 mM D-tryptophan. The reaction mix was adjusted to 25° C. and adjusted to pH 7.8 with potassium hydroxide. The aldolase described in Example 6 was added as a clarified cell extract at 0.02 mg/mL of target protein. Wild type control (SEQ ID NO:220), Mutant 135, Mutant 136, Mutant M, Mutant O, and Mutant BB DATs have soluble protein expressions ranging from 15-35% based on visual estimation. The clarified cell extracts were added at 0.20 mg/mL of target protein.
The progress of the reactions was followed by measuring monatin production at 1, 2, 4 and 24 hours using the LC/MS/MS methodology described in Example 36. The results are shown in Table 62.







TABLE 62







Monatin Production in Fermentors














Monatin
Monatin
Monatin
Monatin



Protein
(mM)
(mM)
(mM)
(mM)


DAT polypeptide
Expression
1 hr
2 hr
4 hr
24 hr















wild type control
25%
0.90
2.80
12.40
12.80


Mutant 135
30%
0.50
8.80
12.40
12.40


Mutant 136
35%
3.80
7.80
11.60
12.80


Mutant M
15%
3.40
6.80
12.10
12.20


Mutant O
15%
5.20
8.60
10.90
9.80


Mutant BB
15%
3.40
6.20
10.50
12.60









The initial rate of monatin production observed with mutants Mutant 136, Mutant M, Mutant O, and Mutant BB was faster than the rate with the wild type control (SEQ ID NO:220). All the mutants showed improved monatin formation at 2 hours under the conditions tested. The lower than expected monatin titer at 1 hour for Mutant 135 was attributed to the inadvertent exposure to oxygen during the first hour. After 4 hours, the monatin titer was comparable between the mutants and the control under the conditions tested.
Example 35
Evaluation of the Impact of Temperature on Mutant DATs in BioReactors
This example describes data demonstrating the enzymatic activity of exemplary polypeptides disclosed herein under different temperature conditions. The wild type control (SEQ ID NO:220), Mutant 135 and Mutant M were produced in a fermentor at the 2.5 L scale as described in Example 15. At the end of fermentation, the cells were harvested by centrifugation at 5000-7000×g for 10 minutes and frozen as a wet cell paste at −80° C.
To prepare cell free extract containing the wild type control, Mutant 135 and Mutant M D-aminotransferases, 50 g of wet cell paste was suspended in 150 mL of 50 mM potassium phosphate buffer (pH 7.8) containing 0.05 mM pyridoxal phosphate (PLP) and then disrupted using a Microfluidics homogenizer (Microfluidics, Newton, Mass.) (3 passes at 18,000 psi), maintaining the temperature of the suspension at less than 15° C. Cellular debris was removed by centrifugation (20,000×g for 30 minutes).
The rate of formation of I3P from tryptophan was monitored at 340 nm for three minutes as described in Example 32. The concentration of the wild type control was determined to be 6.8 mg/mL, the concentration of Mutant 135 was determined to be 7.0 mg/mL and Mutant M was determined to be 5.6 mg/mL based on a standard curve generated with purified DAT wild type control. The DAT concentrations determined by I3P formation were used to dose the Infors to 0.2 mg/mL DAT. The aldolase was added as a cell free extract at 0.02 mg/mL aldolase. The reaction mix contained 10 mM potassium phosphate, 1 mM MgCl2, 0.05 mM PLP, 200 mM sodium pyruvate and 130 mM D-tryptophan under a nitrogen headspace. Each of the DATs was evaluated for monatin production in a bioreactor at 35° C. and at 25° C.
Samples were taken at 0.5, 1, 3, 4 and 24 hours and analyzed using the LC/MS/MS methodology described in Example 36. The results are shown in Table 63.







TABLE 63







Fermenters at 25° and 35° C.













Monatin
Monatin
Monatin
Monatin
Monatin


DAT
(mM)
(mM)
(mM)
(mM)
(mM)


polypeptide
0.5 hr
1 hr
3 hr
4 hr
24 hr















25° C.







Wild type
0.9
2.4
5.6
7.9
19.1


control (SEQ


ID NO: 220)


Mutant 135
1.6
4.4
10.9
12.1
18.6


Mutant M
2.1
4.5
9.4
12.4
17.4


35° C.


Wild type
2.3
3.9
6.5
7.9
10.7


control (SEQ


ID NO: 220)


Mutant 135
4.1
6.1
9.8
11.5
14.9


Mutant M
4.1
6.3
9.9
11.3
14.9









As seen in Example 34, select mutant DATs yielded higher monatin titers at 35° C. compared to the wild type control DAT (SEQ ID NO:220). The wild type control DAT had a slower initial rate of monatin production but a higher final titer at 25° C. under the conditions tested. Both mutants Mutant 135 and Mutant M showed improved activity over the wild type control at 25° C. and 35° C. Mutants Mutant 135 and Mutant M had both a higher initial rate of monatin production and a higher final titer at 35° C. compared to the control under the conditions tested. The selected mutants were more stable than the wild type control at the higher temperatures. This indicates the advantages of GSSM and TMCA technologies in producing mutants with greater thermostability than the wild type control. One skilled in the arts could screen these GSSM or TMCA libraries for mutants with, for example, increased temperature tolerance.
Example 36
Detection of Monatin, MP, Tryptophan, Alanine, and HMG
This example describes the analytical methodology associated with the further characterization of exemplary D-aminotransferase (DAT) enzymes disclosed herein.
UPLC/UV Analysis of Monatin and Tryptophan
Analyses of mixtures for monatin and tryptophan derived from biochemical reactions were performed using a Waters Acquity UPLC instrument including a Waters Acquity Photo-Diode Array (PDA) absorbance monitor. UPLC separations were made using an Agilent XDB C8 1.8 μm 2.1×100 mm column (part #928700-906) (Milford, Mass.) at 23° C. The UPLC mobile phase consisted of A) water containing 0.1% formic acid B) acetonitrile containing 0.1% formic acid.
The gradient elution was linear from 5% B to 40% B, 0-4 minutes, linear from 40% B, to 90% B, 4-4.2 minutes, isocratic from 90% B to 90% B, 4.2-5.2 minutes, linear from 90% B to 5% B, 5.2-5.3 minutes, with a 1.2 minute re-equilibration period between runs. The flow rate was 0.5 mL/min, and PDA absorbance was monitored at 280 nm.
Sample concentrations are calculated from a linear least squares calibration of peak area at 280 nm to known concentration, with a minimum coefficient of determination of 99.9%.
Derivatization of Monatin Intermediates (Indole-3-Pyruvic Acid (I3P), Hydroxymethyloxyglutaric Acid, Monatin Precursor, and Pyruvate) with O-(4-Nitrobenzyl)Hydroxylamine Hydrochloride (NBHA)
In the process of monatin production, various intermediate compounds are formed and utilized. These compounds include: Indole-3-Pyruvic Acid (I3P), Hydroxymethyloxyglutaric Acid, Monatin Precursor, and Pyruvate. The ketone functional group on these compounds can be derivatized with O-(4-Nitrobenzyl)hydroxylamine hydrochloride (NBHA).
To 20 μL of sample or standard, 140 μL of NBHA (40 mg/mL in pyridine) was added in an amber vial. Samples were sonicated for 15 min in the presence of heat with occasional mixing. A 1:3 dilution in 35% Acetonitrile in water was performed.
UPLC/UV Analysis of Monatin Intermediates (Indole-3-Pyruvic Acid, Hydroxymethyloxyglutaric Acid, Monatin Precursor, and Pyruvate)
A Waters Acquity UPLC instrument including a Waters Acquity Photo-Diode Array (PDA) absorbance monitor (Waters, Milford, Mass.) was used for the analysis of the intermediate compounds. UPLC separations were made using a Waters Acquity HSS T3 1.8 mm×150 mm column (Waters, Milford, Mass.) at 50° C. The UPLC mobile phase consisted of A) water containing 0.3% formic acid and 10 mM ammonium formate and B) 50/50 acetonitrile/methanol containing 0.3% formic acid and 10 mM ammonium formate.
The gradient elution was linear from 5% B to 40% B, 0-1.5 minutes, linear from 40% B, to 50% B, 1.5-4.5 minutes, linear from 50% B to 90% B, 4.5-7.5 minutes, linear from 90% B to 95% B, 7.5-10.5 minutes, with a 3 minute re-equilibration period between runs. The flow rate was 0.15 mL/min from 0-7.5 minutes, 0.18 mL/min from 7.5-10.5 minutes, 0.19 mL/min from 10.5-11 minutes, and 0.15 mL/min from 11-13.5 minutes. PDA absorbance was monitored at 270 nm.
Sample concentrations were calculated from a linear least squares calibration of peak area at 270 nm to known concentration, with a minimum coefficient of determination of 99.9%.
Chiral LC/MS/MS (MRM) Measurement of Monatin
Determination of the stereoisomer distribution of monatin in biochemical reactions was accomplished by derivatization with 1-fluoro-2-4-dinitrophenyl-5-L-alanine amide 30 (FDAA), followed by reversed-phase LC/MS/MS MRM measurement.
Derivatization of Monatin with FDAA
100 μL of a 1% solution of FDAA in acetone was added to 50 μL of sample or standard. Twenty μL of 1.0 M sodium bicarbonate was added, and the mixture was incubated for 1 hour at 40° C. with occasional mixing. The sample was removed and cooled, and neutralized with 20 μL of 2.0 M HCl (more HCl may be required to effect neutralization of a buffered biological mixture). Samples were analyzed by LC/MS/MS.
LC/MS/MS Multiple Reaction Monitoring for the Determination of the Stereoisomer Distribution of Monatin
Analyses were performed using the Waters/Micromass® liquid chromatography-tandem mass spectrometry (LC/MS/MS) instrument including a Waters 2795 liquid chromatograph with a Waters 996 Photo-Diode Array (PDA) absorbance monitor (Waters, Milford, Mass.) placed in series between the chromatograph and a Micromass® Quattro Ultima® triple quadrupole mass spectrometer. The LC separations capable of separating all four stereoisomers of monatin (specifically FDAA-monatin) were performed on a Phenomenex Luna® 2.0×250 mm (3 μm) C18 reversed phase chromatography column at 40° C. The LC mobile phase consisted of A) water containing 0.05% (mass/volume) ammonium acetate and B) acetonitrile. The elution was isocratic at 13% B, 0-2 minutes, linear from 13% B to 30% B, 2-15 minutes, linear from 30% B to 80% B, 15-16 minutes, isocratic at 80% B 16-21 minutes, and linear from 80% B to 13% B, 21-22 minutes, with a 8 minute re-equilibration period between runs. The flow rate was 0.23 mL/min, and PDA absorbance was monitored from 200 nm to 400 nm. All parameters of the ESI-MS were optimized and selected based on generation of deprotonated 20 molecular ions ([M−H]−) of FDAA-monatin, and production of characteristic fragment ions. The following instrumental parameters were used for LC/MS analysis of monatin in the negative ion ESI/MS mode: Capillary: 3.0 kV; Cone: 40 V; Hex 1: 15 V; Aperture: 0.1 V; Hex 2: 0.1 V; Source temperature: 120° C.; Desolvation temperature: 350° C.; Desolvation gas: 662 L/h; Cone gas: 42 L/h; Low mass resolution (Q1): 14.0; High mass resolution (Q1): 15.0; Ion energy: 0.5; Entrance: 0 V; Collision Energy: 20; Exit: 0 V; Low mass resolution (Q2): 15; High mass resolution (Q2): 14; Ion energy (Q2): 2.0; Multiplier: 650. Three FDAA-monatin-specific parent-to-daughter transitions were used to specifically detect FDAA-monatin in in vitro and in vivo reactions. The transitions monitored for monatin were 542.97 to 267.94, 542.97 to 499.07, and 542.97 to 525.04. Identification of FDAA-monatin stereoisomers was based on chromatographic retention time as compared to purified monatin stereoisomers, and mass spectral data.
Liquid Chromatography-Post Column Derivatization with OPA, Fluorescence Detection of Amino Acids, Including: Hydroxymethyl Glutamate (HMG) and Alanine
Analyses of mixtures for HMG and alanine derived from biochemical reactions were performed using a Waters Alliance 2695 and a Waters 600 configured instrument with a Waters 2487 Dual Wavelengths Absorbance Detector and Waters 2475 Fluorescence Detector as a detection system (Waters, Milford, Mass.). HPLC separations were made using two Phenomenex Aqua C18 125A, 150 mm×2.1 mm, 3μ, Cat #00E-4311B0 columns in series as the analytical columns, and a Phenomenex Aqua C18 125A, 30 mm×2.1 mm, 3μ, Cat #00A-4311B0 as an on-line solid phase extraction (SPE) column. Temperature for the two analytical columns was set at 55° C., and the on-line SPE column was at room temperature. The HPLC mobile phase consisted of A) 0.6% acetic acid with 1% methanol. The flow rate was (100% A) 0.2 mL/min from 0-3.5 minutes, 0.24 mL/min from 3.5-6.5 minutes, 0.26 mL/min from 6.5-10.4 minutes, and 0.2 mL/min from 10.4-11 minutes. UV-VIS absorbance detector was set to monitor at 336 nm wavelength. Fluorescence detector was set at 348 nm and 450 nm to monitor the excitation and Emission Wavelengths Respectively.
Other Embodiments
It is to be understood that while the invention has been described in conjunction with the detailed description thereof, the foregoing description is intended to illustrate and not limit the scope of the invention, which is defined by the scope of the appended claims. Other aspects, advantages, and modifications are within the scope of the following claims.

## Claims

1. An isolated, synthetic, or a recombinant nucleic acid encoding a polypeptide having a d-amino-acid transferase activity, wherein the polynucleotide is selected from the group consisting of:
(a) a variant nucleic acid sequence having 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% sequence identity over the full length of a cDNA, transcript (mRNA) or gene to the nucleic acid sequence of SEQ ID NO: 869; and
(b) a nucleic acid encoding the polypeptide having d-amino-acid transferase activity, wherein the polypeptide comprises the amino acid sequence having at least 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% sequence identity to the polypeptide of SEQ ID NO:870.

2. An expression cassette, a vector, or a cloning vehicle comprising the nucleic acid sequence of claim 1, wherein optionally the cloning vehicle comprises a viral vector, a plasmid, a phage, a phagemid, a cosmid, a fosmid, a bacteriophage or an artificial chromosome.

3. The cloning vehicle of claim 2, wherein the viral vector comprises an adenovirus vector, a retroviral vector or an adeno-associated viral vector, or, the artificial chromosome comprises a bacterial artificial chromosome (BAC), a bacteriophage Pl-derived vector (PAC), a yeast artificial chromosome (YAC), or a mammalian artificial chromosome (MAC).

4. A transformed cell comprising the expression cassette, vector or cloning vehicle of claim 2, wherein the transformed cell is a bacterial cell, a mammalian cell, a fungal cell, a yeast cell, an insect cell, or a plant cell.

5. The polynucleotide of claim 1, encoding a variant polypeptide having at least one conservative amino acid substitution and retaining d-amino-acid transferase activity; wherein the at least one conservative amino acid substitution comprises substituting an amino acid with another amino acid of like characteristics; replacement of an aliphatic amino acid with another aliphatic amino acid; replacement of a Serine with a Threonine, or vice versa; replacement of an acidic residue with another acidic residue; replacement of a residue bearing an amide group with another residue bearing an amide group; exchange of a basic residue with another basic residue; or replacement of an aromatic residue with another aromatic residue.

6. The polynucleotide of claim 1, encoding the polypeptide having d-amino-acid transferase activity but lacking a signal sequence, a prepro domain, a binding domain.

7. The polynucleotide of claim 6, wherein the binding domain consists of: a NAD, a NAD(P), a calcium, a thiamine, a FAD, a zinc, a DNA and a lipoyl binding domain.

8. The polynucleotide of claim 1, encoding the polypeptide having d-amino-acid transferase and further comprising a heterologous sequence.

9. The polynucleotide of claim 8, wherein the heterologous sequence consists of: a heterologous signal sequence, a heterologous domain, a heterologous binding domain, a heterologous dockerin domain, a heterologous catalytic domain (CD), or a combination thereof.

10. A nucleic acid sequence fully complementary to the nucleic acid sequence of claim 1.