# Patent

## Title
Cellulomonas 69B4 serine protease variants

## Abstract

The present invention provides novel Micrococcineae spp serine proteases having multiple substitutions. In particular, the present invention provides serine proteases having multiple substitutions, DNA encoding these proteases, vectors comprising the DNA encoding the proteases, host cells transformed with the vector DNA, and enzymes produced by the host cells. The present invention also provides cleaning compositions (e.g., detergent compositions), animal feed compositions, and textile and leather processing compositions comprising these serine protease variants. In particularly preferred embodiments, the present invention provides mutant (i.e., variant) proteases derived from the wild-type proteases described herein. These variant proteases also find use in numerous applications.

## Background
The present application is a Continuation of U.S. patent application Ser. No. 11/583,334, filed Oct. 19, 2006, now abandoned, which is a Continuation-in-Part of pending U.S. patent application Ser. No. 10/576,331 filed Jul. 18, 2007, which claims priority to PCT/US2004/039066, filed Nov. 19, 2004, which claims priority to U.S. Provisional Patent Application Ser. No. 60/523,609, filed Nov. 19, 2003.


FIELD OF THE INVENTION
The present invention provides novel Micrococcineae spp serine proteases having multiple substitutions. In particular, the present invention provides serine proteases having multiple substitutions, DNA encoding these proteases, vectors comprising the DNA encoding the proteases, host cells transformed with the vector DNA, and enzymes produced by the host cells. The present invention also provides cleaning compositions (e.g., detergent compositions), animal feed compositions, and textile and leather processing compositions comprising these serine protease variants. In particularly preferred embodiments, the present invention provides mutant (i.e., variant) proteases derived from the wild-type proteases described herein. These variant proteases also find use in numerous applications.
BACKGROUND OF THE INVENTION
Serine proteases are a subgroup of a diverse class of enzymes having a wide range of specificities and biological functions (See e.g., Stroud, Sci. Amer., 131:74-88 [1974]). Despite their functional diversity, the catalytic machinery of serine proteases is represented by at least two genetically distinct families of enzymes: 1) the subtilisins; and 2) the mammalian chymotrypsin-related and homologous bacterial serine proteases (e.g., trypsins). These two families of serine proteases show remarkably similar mechanisms of catalysis (See e.g., Kraut, Ann. Rev. Biochem., 46:331-358 [1977]). Furthermore, although the primary structure is unrelated, the tertiary structure of these two enzyme families brings together a conserved catalytic triad of amino acids consisting of serine, histidine and aspartate.
In contrast, the subtilisins and chymotrypsin-related serine proteases both have a catalytic triad comprising aspartate, histidine and serine. In the subtilisin-related proteases the relative order of these amino acids, reading from the amino to carboxy terminus, is aspartate-histidine-serine. However, in the chymotrypsin-related proteases, the relative order is histidine-aspartate-serine. Much research has been conducted on the subtilisins, due largely to their usefulness in cleaning and feed applications. Additional work has been focused on the adverse environmental conditions (e.g., exposure to oxidative agents, chelating agents, extremes of temperature and/or pH) which can adversely impact the functionality of these enzymes in various applications. Nonetheless, there remains a need in the art for enzyme systems that are able to resist these adverse conditions and retain or have improved activity over those currently known in the art.
SUMMARY OF THE INVENTION
The present invention provides novel Micrococcineae spp serine proteases having multiple substitutions. In particular, the present invention provides serine proteases having multiple substitutions, DNA encoding these proteases, vectors comprising the DNA encoding the proteases, host cells transformed with the vector DNA, and enzymes produced by the host cells. The present invention also provides cleaning compositions (e.g., detergent compositions), animal feed compositions, and textile and leather processing compositions comprising these serine protease variants. In particularly preferred embodiments, the present invention provides mutant (i.e., variant) proteases derived from the wild-type proteases described herein. These variant proteases also find use in numerous applications.
The present invention provides isolated serine protease variants having an amino acid sequence comprising at least two amino acid substitutions, wherein the substitutions are made at positions equivalent to the positions in a Cellulomonas 69B4 protease comprising the amino acid sequence set forth in SEQ ID NO:8. The present invention further provides compositions comprising the isolated serine protease variant(s) having at least two amino acid substitutions, wherein the substitutions are made at positions equivalent to positions in a Cellulomonas 69B4 protease comprising the amino acid sequence set forth in SEQ ID NO:8. In some preferred embodiments, the compositions comprise at least one variant serine protease, wherein the variant serine protease has immunological cross-reactivity with the serine protease set forth in SEQ ID NO:8. In some additional preferred embodiments, the sequence of a serine protease variant comprises substitutions at least two amino acid positions selected from positions 1, 2, 3, 4, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 18, 19, 22, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 51, 52, 54, 55, 56, 57, 59, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 96, 99, 100, 101, 103, 104, 105, 107, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 121, 123, 124, 125, 126, 127, 128, 129, 130, 132, 133, 134, 135, 136, 137, 140, 141, 142, 143, 144, 145, 146, 147, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 170, 171, 172, 175, 176, 177, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, and 189, wherein the substitutions are made at positions equivalent to the positions in a Cellulomonas 69B4 protease comprising the amino acid sequence set forth in SEQ ID NO:8.
In some preferred embodiments, the serine protease variant comprises at least two substitutions selected from G12D, R14I, R14L, R14M, R14S, R16I, R16L, R16Q, N24E, N24H, N24M, N24T, N24W, R35E, R35F, R35H, T36S, G49A, G54D, G54L, R61V, A64K, G65Q, Q71F, Y75G, S76A, S76L, S76N, S76T, S76V, R79K, R79T, Q81K, Q81P, T86K, A93G, A93H, A93S, S99A, T109M, N112E, T116E, R123F, R123L, R123Q, R123S, R127A, R127K, R127Q, R159E, R159F, R159G, R159K, R159L, R159Q, R179N, R179Q, I181K, I181Q, I181T, D184N, D184T, and S187Q, wherein the substitutions are made at positions equivalent to the positions in a Cellulomonas 69B4 protease comprising the amino acid sequence set forth in SEQ ID NO:8. In some yet additional preferred embodiments, the serine protease variant comprises multiple substitutions selected from R16Q/R35F/R159Q, R16Q/R123L, R14L/R127Q/R159Q, R14L/R179Q, R123L/R127Q/R179Q, R16Q/R79T/R127Q, R16Q/R79T, R35E/R123L/R127Q/R179Q, and G12D/R35E/G63R/R79K/T109M, wherein the substitutions are made at positions equivalent to the positions in a Cellulomonas 69B4 protease comprising the amino acid sequence set forth in SEQ ID NO:8. In some still further embodiments, the serine protease variant comprises the following substitutions R123L, R127Q, and R179Q, wherein the substitutions are made at positions equivalent to the positions in a Cellulomonas 69B4 protease comprising the amino acid sequence set forth in SEQ ID NO:8.
In some further preferred embodiments, the serine protease variant comprises at least two substitutions selected from D2G, D2Q, V3I, V3L, N7A, N7L, N7S, I11A, I11Q, R14E, N24A, N24E, N24H, N24L, N24M, N24Q, N24T, N24V, T36D, T36F, T36G, T36H, T36I, T36L, T36N, T36P, T36R, T36S, T36V, T36W, T36Y, A38D, A38F, A38H, A38L, A38N, A38R, A38S, G49F, S51A, G54A, G54D, G54H, G54K, G54L, G54M, G54R, N55F, A64H, A64N, A64R, A64W, A64Y, G65L, G65P, G65Q, G65R, G65S, G65T, G65Y, G65V, V66A, V66D, V66E, V66H, V66I, V66L, N67A, N67G, N67L, N67K, L69H, L69S, L69V, A70D, A70H, A70S, Q71A, Q71G, Q71H, Q71I, Q71K, Q71M, Q71N, N73S, N73T, N74G, Y75F, Y75G, Y75I, S76L, S76Y, S76V, S76W, G77S, G77T, G78A, G78D, G78H, G78N, G78S, G78T, R79P, V80H, V80L, Q81H, Q81K, Q81V, H85Q, H85T, V90I, V90P, V90S, S92G, W103I, W103M, H104K, T109A, T109H, T109I, S114G, T116F, P118A, P118F, P118H, P118R, E119K, E119R, N145E, N145I, N145Q, V150L, R159F, N170Y, G177M, R179A, R179D, R179E, R179I, R179K, R179L, R179M, R179N, R179T, R179Y, R179V, I181H, T183I, G186E, G186I, G186V, S187P, S187T, and S188M, wherein the substitutions are made at positions equivalent to the positions in a Cellulomonas 69B4 protease comprising the amino acid sequence set forth in SEQ ID NO:8.
In some additional embodiments, the serine protease variant comprises at least two substitutions selected from F1A, F1T, D2A, D2H, D2N, V3T, N7H, N7I, A8G, A8K, T10G, T10K, I11S, I11T, G12W, G13M, S15F, N24F, N24S, A30S, R35F, T36C, A38G, A38I, A38K, A38V, A38Y, T40S, T40V, A41N, N42H, F47I, F47M, G49A, G49K, G49L, S51F, S51Q, G54I, G54Q, N55K, N55Q, R61M, T62I, G63Q, G63V, G63W, A64F, A64I, A64K, A64L, A64M, A64Q, A64S, A64T, A64V, G65A, G65H, V66M, V66N, N67D, N67F, N67H, N67Q, N67R, N67S, N67T, N67V, N67Y, L68W, L69W, A70G, Q71D, Q71F, Q71L, Q71R, V72I, N73H, S76E, S76I, S76K, S76A, S76N, S76Q, S76R, S76T, G77N, G77Y, G78I, S78R, G78V, R79G, V80F, Q81D, Q81I, A83N, H85R, H85K, H85L, T86A, P89N, V90A, V90L, V90T, T107H, T107M, T107S, T107V, T109G, T109L, T109P, T109R, A110S, A110T, N112I, P118E, P118I, P118K, P118Q, R123E, R123I, I126L, R127F, I28L, T129S, E133Q, L142V, A143N, A143S, N145G, N145L, N145T, V150M, T151L, R159E, T163L, Q167N, N170A, N170D, N170L, 171S, G177S, I181G, I181N, T182V, T183K, T183M, D184F, D184H, D184Q, D184R, S185I, S185V, S187E, and S187L, wherein the substitutions are made at positions equivalent to the positions in a Cellulomonas 69B4 protease comprising the amino acid sequence set forth in SEQ ID NO:8.
In yet additional embodiments, the serine protease variant comprises at least two substitutions selected from D2P, A8G, T10C, T10L, I11E, I11Q, I11T, I11W, G12D, G12I, G12N, G12Q, G12S, G12V, R14A, R14C, R14E, R14D, R14G, R14I, R14N, R14Q, R14S, R14T, S15C, S15E, S15H, S15R, S15Y, R16C, R16D, R16E, R16T, R16V, A22C, A22S, N24E, R35A, R35C, R35D, R35E, R35H, R35M, R35N, R35P, R35Q, R35S, R35T, R35V, T36C, A38C, A38D, A41C, A41D, T44E, T46C, T46E, T46F, T46V, T46Y, F47R, A48E, G49A, G49C, G49E, G49H, G49L, G49N, G49Q, G49V, G54C, N55G, D56L, Y57G, F59W, R61E, R61M, R61T, R61V, G91Q, S99A, T100A, T100R, T107R, T109E, N112P, S113C, S114C, P118K, P118R, E119G, E119R, E119T, E119V, E119Y, T121E, T121F, T121L, R123C, R123D, R123E, R123F, R123H, R123N, R123Q, R123S, R123T, R123V, R123W, R123Y, G124D, L125Q, R127D, R127E, R127K, R127Q, R127S, P134R, T151C, T151L, S155C, S155I, S155W, S155Y, R159D, R159E, R159Q, R159S, R159T, R159V, T163D, F165E, F165W, Q167E, N170C, N170D, G177D, R179D, R179E, and M180L, wherein the substitutions are made at positions equivalent to the positions in a Cellulomonas 69B4 protease comprising the amino acid sequence set forth in SEQ ID NO:8. In still further additional embodiments, the serine protease variant comprises at least two substitutions selected from F1N, F1P, D2I, D2M, D2T, D2V, A8R, A8T, T10D, T10E, T10F, T10M, T10Q, T10Y, G12H, G12P, G12Y, G13D, G13E, R14H, R14L, R14M, S15F, S15G, S15N, R16I, R116Q, N24G, N24T, I28V, R35K, T36V, A41S, A41T, N42D, T44C, F47V, G49F, G49K, G49S, S511A, S511C, S511L, S115M, G54E, N55A, D56F, R61K, R61Q, A64C, G65D, V66N, A70G, A70M, A70P, R79T, R79V, Q811A, Q81G, Q811P, A83E, A83D, A83H, T86E, A87C, A87E, A88F, S92T, S99G, S99H, S99K, S99Q, T100K, T100Q, W103L, T109K, N112D, N112E, S113A, S113D, S114E, T115C, T116G, T116N, P118A, P118C, P118G, P118W, E119A, E119L, E119N, E119Q, E119S, T121A, T121D, R123A, R123G, R123I, R123K, R123M, A132S, L125M, R127A, R127C, T128A, S140P, L141M, T151V, S155E, S155F, S155T, S155V, N157D, R159A, R159C, R159K, R159M, R159N, T160D, T163C, F165H, N170L, I172A, Q174C, Q174S, Q174T, A175T, G177E, R179C, R179F, R179I, R179L, R179M, R179N, R179S, R179T, R179V, R179W, R179Y, S187E, and S188E, wherein the substitutions are made at positions equivalent to the positions in a Cellulomonas 69B4 protease comprising the amino acid sequence set forth in SEQ ID NO:8.
In some further embodiments, the present invention provides a serine protease variant, wherein the amino acid sequence of the protease comprises at least two substitutions selected from V3R, I4D, I4G, I4P, Y9E, Y9P, T10F, T10W, T10Y, G12D, S18E, A22C, A22S, A22T, N24T, G26E, G26I, G26K, G26Q, G26V, G26W, F27V, F27W, I28P, I28T, T29E, A30M, A30N, A30P, A30Y, G31H, G31M, G31N, G31V, G31Y, C33E, C33L, C33M, C33N, A38D, A38G, T39R, T40D, T40H, T40N, T40P, T40Q, R43D, P43G, P43H, P43K, P43L, P43N, G45A, G45V, T46V, T46Y, T46W, A48P, Y57M, Y57N, F59K, T62G, T62R, A70G, A70P, N73P, R79T, Q81A, Q81D, Q81F, Q81G, Q81H, Q811P, Q81S, A83H, G84C, G84P, P89W, G91L, A93S, R96C, R96E, R96F, S99A, T100A, C105E, C105G, C105K, C105M, C105N, C105P, C105S, C105W, T121E, R123F, R123N, R123W, R123Y, L125A, T128A, T128C, T128G, T128S, T128V, I28W, T129W, S137R, S140P, Q146P, A147E, S155F, S155K, S155P, S155R, S155W, S155Y, G156I, G156L, G156P, C158G, C158H, C158M, R159K, T160I, G161I, G161L, G161V, T164G, T164L, F166S, Q167L, P168Y, Y176P, G186S, and S188A, wherein the substitutions are made at positions equivalent to the positions in a Cellulomonas 69B4 protease comprising the amino acid sequence set forth in SEQ ID NO:8. In some embodiments, the amino acid sequence of the serine protease variant comprises at least two substitutions selected from A8G, T10C, T10L, G12A, G12H, S15C, S15N, S15Q, S15R, S15T, N24E, N24S, G25S, F27I, G31A, H32A, C33D, T36V, T39V, A41S, T46F, G49A, S51V, F59W, Q71A, Q71Y, N74F, R79V, Q80C, Q81E, A83E, A83F, A83M, A83R, G84M, G84V, T86I, T86M, T86S, A87E, A87S, P89A, V90A, V90M, S92T, A93D, S99G, T100Q, T101S, W103N, C105A, C105L, C105T, C105Y, T107A, T107F, T107L, T107Q, T107S, T110D, A110G, L111K, V115I, V115L, T116Q, Y117K, Y117Q, Y117R, Y117V, P118T, E119L, T121A, T121D, R123I, R123K, R123L, R123Q, R123T, L125M, R127F, R127K, R127Q, T129Y, V130T, A132C, P134W, L141C, A143H, G144A, V150N, T151C, G153K, G153V, G154L, G154R, S155T, R159Q, R159T, R159V, T160E, T160Q, G161K, G162P, T163I, F166A, F166C, P168I, N170D, N170E, G177N, R179K, M180L, T182L, T183A, T183I, T183P, S185R, G186P, S188C, S188E, S188G, S188M, S188T, S188V, and P189S, wherein the substitutions are made at positions equivalent to the positions in a Cellulomonas 69B4 protease comprising the amino acid sequence set forth in SEQ ID NO:8.
The present invention further provides a serine protease variant, wherein the amino acid sequence of the protease comprises at least two substitutions selected from F1T, T10N, R14D, R14G, R14I, R14L, R14N, R14Q, R14T, N24A, N24E, N24H, N24L, N24Q, N24T, N24V, R35A, R35E, R35F, R35L, R35Q, R35T, T36G, T36I, T36N, T36S, A38D, A38F, A38H, A38N, A38R, G49A, G49S, S51I, G54D, G54E, N55E, N55F, A64I, G65D, G65P, G65Q, G65S, G65T, G65V, N67D, L69S, N73T, N74G, Y75F, Y75G, S76D, S76E, S76I, S76L, S76N, S76T, S76V, S76Y, G77T, G78A, G78D, R79A, R79D, R79E, R79G, R79L, R79M, R79P, R79S, R79T, R79V, Q81E, A83E, H85Q, H85T, T86D, T86E, V90I, V90P, V90S, V90T, S99N, S99V, T107E, T107H, T107S, T107V, T109E, N112D, N112E, N112L, N112Q, N112V, T116E, T116Q, T121E, R123A, R123D, R123E, R123F, R123H, R123I, R123L, R123N, R123Q, R127A, R127Q, T129S, L142V, N145E, R159D, R159E, R159F, R159N, R159Q, N170D, N170Y, I172T, R179A, R179D, R179E, R179I, R179K, R179M, R179N, R179T, R179V, R179Y, I181L, and G186N, wherein the substitutions are made at positions equivalent to the positions in a Cellulomonas 69B4 protease comprising the amino acid sequence set forth in SEQ ID NO:8. In some alternative embodiments, the amino acid sequence of the protease comprises at least two substitutions selected from F1D, V3L, N7L, A8E, A8G, T10D, T10E, G12D, G13S, R14A, R14K, R14S, R14M, S15W, 119V, N24M, R35H, R35M, R35S, R35W, R35Y, T36D, T36H, A38L, A38S, A38T, A38Y, T40V, A41D, A41N, A48E, G49F, G49H, S51H, S51Q, S51T, S51V, R61E, R61H, R61M, R61S, R61T, G63D, A64F, A64H, A64L, A64M, A64N, A64P, A64Q, A64S, A64T, A64V, A64W, A64Y, G65L, G65Y, N67E, N67G, N67H, N67S, N67T, A70D, A70G, A70H, Q71D, Q71G, Q71H, Q71S, V72I, S76Q, S76W, G77S, Q81D, Q81H, Q81V, H85L, H85M, V90N, S92A, S92G, A93D, A93E, A93S, S99D, S99T, T101S, W103M, T107A, T107I, T107M, T107N, T109A, T109G, T109I, A110S, N112Y, S113T, S114A, V115A, T116F, T121D, N121I, R123G, R123S, R123T, R123V, R123Y, R127H, R127K, R127E, R127S, R127Y, N145D, N145T, R159A, R159C, R159K, R159L, R159S, R159Y, T160E, T163D, N170L, R179L, T182V, T183E, T183I, and S185N, wherein the substitutions are made at positions equivalent to the positions in a Cellulomonas 69B4 protease comprising the amino acid sequence set forth in SEQ ID NO:8. In some yet additional embodiments, the serine protease variant comprises at least two substitutions selected from D2Q, V3L, N7L, I11A, I11Q, R14I, R14M, R16L, R16Q, N24A, N24E, N24H, N24M, N24Q, N24T, N24V, R35F, R35L, T36D, T36G, T36H, T36I, T36L, T36N, T36P, T36S, T36W, T36Y, A38L, A38R, A38S, A48Q, G49A, G54D, G54I, G54Q, G54N, R61V, A64F, A64H, A64Y, G65L, G65P, G65Q, G65S, G65T, G65Y, V66H, N67A, N67G, N67L, N67S, N67V, N67Y, L69H, L69S, Q71I, N73T, N74G, Y75F, Y75G, Y75I, S76A, S76D, S76E, S76I, S76L, S76N, S76T, S76V, S76W, S76Y, G77T, G78D, R79G, R79P, Q81P, H85F, H85K, H85L, H85Q, H85R, P89D, S92A, A93T, A93S, S99A, S99D, S99N, S99T, S99W, T109E, N112E, S113A, S114G, T116F, T121D, R123F, R123I, R123L, R127A, R127F, R127G, R127H, R127K, R127L, R127Q, R127S, R127T, R127Y, A132V, P134E, A143N, N157D, R159D, R159E, R159F, R159H, R159K, R159N, R159Y, G161K, N170Y, R179V, I181Q, D184F, D184H, G186E, G186I, G186V, and S187P, wherein the substitutions are made at positions equivalent to the positions in a Cellulomonas 69B4 protease comprising the amino acid sequence set forth in SEQ ID NO:8.
In some additional embodiments, the amino acid sequence of the serine protease variant comprises at least two substitutions selected from F1T, A8D, A8G, T10E, T10L, T10Q, I11L, I11S, I11T, G12D, G12Y, R14E, R14L, R14N, R14P, S15E, R16A, R16G, R16I, R16N, N24L, N24S, V31F, R35A, A38D, A38F, A38N, A38V, A38Y, T40V, A41N, N42H, G49F, G49H, G49S, S51Q, S51T, G54A, G54L, G54M, N55F, R61H, R61K, R61M, R61S, R61T, A64N, A64S, A64T, A64V, A64W, G65R, G65V, V66D, N67F, N67K, N67M, N67Q, N67T, L69W, A70G, A70P, Q71D, Q71F, Q71H, Q71L, Q71T, G77N, G77S, G78A, G78N, R79D, V80H, V80L, H85T, H85Y, T86N, A88F, P89N, P89V, V90I, V90P, V90T S92G, A93D, A93E, S99G, L111D, L111E, N112D, N112G, N112L, N112Q, S113G, T121E, R123E, R123K, R123Q, L125V, P134G, S140A, L142V, A143S, N145D, V150L, R159A, R159C, R159L, R159V, T160E, G161E, T163D, T163I, N170D, N170L, R179D, R179E, R179K, R179N, R179T, I181H, T183I, D184R, D184L, D184Q, D184T, S185W, S185I, G186L, S187E, S187Q, and S188Q, wherein the substitutions are made at positions equivalent to the positions in a Cellulomonas 69B4 protease comprising the amino acid sequence set forth in SEQ ID NO:8. In some still further embodiments, the amino acid sequence of the serine protease variant comprises at least two substitutions selected from A8R, A8S, A8T, A8V, R14E, R14L, R14M, R16Q, N24A, N24E, N24Q, N24T, R35F, R35L, T36D, T36G, T36I, T36N, T36P, T36S, A38D, A38F, A38L, A38R, A38S, S51A, S51D, G54D, G54I, N55E, N55F, N55S, R61M, R61T, G63V, A64H, A64N, A64S, G65Q, G65P, G65R, G65S, G65T, G65Y, V66D, N67D, S76E, N67F, N67G, N67L, N67M, N67S, N67T, N67V, N67Y, L69H, L69S, L69V, L69W, N73T, N74G, Y75F, Y75G, S76C, S76D, S76I, S76L, S76N, S76W, S76Y, S76V, G77T, G78D, R79C, R79D, R79E, R79G, R79P, Q81V, A83N, T85A, H85Q, T86F, T86I, T86L, V90I, V90N, V90P, V90S, V90T, A93D, A93E, T107M, T107N, T107S, T109A, T109E, T109I, N112E, T121D, T121E, R123D, R123E, R123F, R123I, I126L, R127A, R127H, R127K, R127L, R127Q, R127S, R127Y, P134A, P134E, L142V, A143N, N145E, N145S, R150Y, R159C, R159D, R159E, R159F, R159K, R159Q, G161E, T163D, N170Y, I172V, G177M, R179A, R179D, R179E, R179I, R179K, R179L, R179M, R179N, R179T, R179V, R179Y, M180D, T182V, T183I, G186E, G186V, and S187P, wherein the substitutions are made at positions equivalent to the positions in a Cellulomonas 69B4 protease comprising the amino acid sequence set forth in SEQ ID NO:8. In some yet additional embodiments, the amino acid sequence of the serine protease variant comprises at least two substitutions selected from V3L, I4M, A8E, A8H, A8L, A8N, A8P, I11T, R14I, R14Q, R16L, N24H, N24L, N24M, N24V, R35A, R35E, T36V, T36Y, A38H, A38I, A38N, T40V, A41N, G49A, G49L, S51F, S51Q, G54A, G54E, G54M, G54Q, N55Q, N55V, R61V, T62I, G63D, G63L, G63P, G63Q, A64F, A64I, A64L, A64M, A64Q, A64R, A64T, A64V, A64W, G65A, G65D, V66E, N67A, N67C, N67Q, N67R, L69Q, A70G, A70P, A70S, Q71D, Q71M, S76A, S76Q, S76T, G77N, G77Q, R79L, Q81E, Q81H, Q81I, A83D, A83I, H85L, H85R, T86E, T86M, A88F, V90L, S92C, S92G, A93Q, R96K, T101S, W103M, W103Y, T107A, T107E, T107H, T107Q, T107V, T109G, T109H, T109L, T109N, A110S, A110T, N112D, S114G, T116F, T121L, R123A, R123H, R123K, R123L, R123P, R123Q, L125V, R127F, R127T, T129G, T129S, A132V, P134D, P134G, S140A, N145G, N145P, N145Q, N145T, Q146D, T151V, R159A, R159H, R159L, R159N, R159V, S161K, F166Y, N170C, N170D, P171M, A175T, A175V, Y176L, R179W, T182W, T183E, T183K, T183L, T183Q, G186I, G186L, G186P, G186T, S187E, S187T, and S188E, wherein the substitutions are made at positions equivalent to the positions in a Cellulomonas 69B4 protease comprising the amino acid sequence set forth in SEQ ID NO:8. In some additional embodiments, the amino acid sequence of the serine protease variant comprises at least two substitutions selected from: T10A, T10G, T10L, I11A, I11S, I11T, G12I, R14G, R14M, S15E, S15F, S15G, R16K, R16N, A22V, N24A, N24E, N24L, N24Q, N24T, N24V, G34A, T36G, T36I, T36N, T36S, A38F, A38T, G49A, G49F, S51A, G65V, L69H, L69S, Q71I, N73T, N74G, S76D, S76L, S76V, S76W, S76Y, G77T, V80A, V90I, V90P, S99N, S99V, T107K, T107R, N112S, S118A, E119R, R127F, P134D, P134E, P134H, P134L, P134R, P134V, S140A, L142V, V110L, I59F, R159K, T163I, F166Y, Q167N, N170Y, R179V, T182V, G186E, G186S, and G186V, wherein the substitutions are made at positions equivalent to the positions in a Cellulomonas 69B4 protease comprising the amino acid sequence set forth in SEQ ID NO:8.
The present invention also provides serine protease variants that have improved stability as compared to wild-type Cellulomonas 69B4 protease comprising the amino acid sequence set forth in SEQ ID NO:8. In some embodiments, the variants have improved thermostability as compared to wild-type Cellulomonas 69B4 protease comprising the amino acid sequence set forth in SEQ ID NO:8. In some particularly preferred embodiments, the variants comprise multiple substitutions selected from T121E/R123F/R159E, R79T/R127Q/R179Q, R16Q/R79T/R127Q, R16Q/R79T/R123L/R159Q/R179Q, R16Q/R79T/R123L, R16Q/R79T, R16Q/R123L/R159Q, R14Q/T121E, R14L/R79T, R123L/R159Q, R123L/R127Q/R159Q, G12D/S15E/R35D/R123F/R159E, G12D/S15E/R159E, G12D/S15E, G12D/R35H/T121E/R123Q, G12D/R35H/R123Q, G12D/R35H/R123F/R159E, G12D/R35H, G12D/R35E/R123Q, G12D/R35E, G12D/R159E, G12D/R14Q/S15E/R35D, G12D/R14Q/R35H, G12D/R14Q/R159E, G12D/R14E, G12D/R127Q/R159E, G12D/R123E/R159E, and R35E/R123L/R127Q/R175Q, wherein the substitutions are made at positions equivalent to the positions in a Cellulomonas 69B4 protease comprising the amino acid sequence set forth in SEQ ID NO:8. In some alternative embodiments, the variants have improved LAS stability as compared to wild-type Cellulomonas 69B4 protease comprising the amino acid sequence set forth in SEQ ID NO:8. In some particularly preferred embodiments, the variants comprise multiple substitutions selected from T121E/R123F/R159E, S15E/T121E/R123Q, S15E/R35H/R159E, S15E/R35E/R159E, S15E/R35E/R127Q/R159E, S15E/R35E, S15E/R35D/T121E/R123Q, S15E/R35D/R123Q, S15E/R35D/R123F/R159E, S15E/R35D, S15E/R159E, S15E/R127Q, S15E/R123Q, S15E/R123E, R79T/R127Q/R179Q, R35H/R159E, R35H/R127Q/R159E, R35H/R123D/R159E, R35F/R61S/R159Q, R35F/R159Q, R35E/F121E/R123E, R35E/R159E, R35E/R127Q, R35D/R159E, R35D/R127Q/R159E, R35D/R127Q, R35D/R123Q/R159E, R16Q/R79T/R159Q/R179Q, R16Q/R79T/R127Q, R16Q/R79T/R123L/R159Q/R179Q, R16Q/R79T/R123L/R159Q, R16Q/R79T/R123L, R16Q/R79T, R16Q/R61S/R159Q/R179Q, R16Q/R61S/R123L/R159Q, R16Q/R35F/R61S/R159Q, R16Q/R35F/R159Q, R16Q/R35F/R123L/R159Q, R16Q/R35F, R16Q/R159Q/R179Q, R16Q/R159Q, R16Q/R127Q/R179Q, R16Q/R127Q/R159Q, R16Q/R123L/R159Q, R14Q/T121E, R14Q/R35E/T121E, R14Q/R35E/R159E, R14Q/R35E, R14Q/R35D/R127Q, R14Q/R35D/R123E/R159E, R14Q/R35D/R123D/R159E, R14Q/R35D, R14Q/R123Q, R14L/R79T/R127Q/R159Q, R14L/R79T, R14L/R61S/R79T/R123L, R14L/R61S/R123L, R14L/R35F/R79T/R123L/R159Q, R14L/R35F/R61S, R14L/R127Q/R159Q/R179Q, R14L/R123L/R159Q, R14I/R35E/T121E/R159E, R14I/R35E/R127Q, R14I/R35E/R123E, R14I/R35D/R159E, R14I/R35D/R127Q/R159E, R14E/S15E/R35H, R14E/R35H/R127Q, R14D/S15E/R35E/R159E, R14D/R35H/R123Q/R159E, R127Q/R159E, R127Q/R159Q, R123Q/R159E, R123Q/R127Q/R159E, R123L/R159Q, R123L/R127Q/R159Q, R123F/R159E, R123E/R127Q/R159E, R123E/R127Q, G12D/S15E/R35H/R159E, G12D/S15E/R35H/R123F/R127Q/R159E, G12D/S15E/R35E/R159E, G12D/S15E/R35D/R127Q, G12D/S15E/R35D/R123F/R159E, G12D/S15E/R35D/R123E, G12D/S15E/R35D, G12D/S15E/R159E, G12D/S15E, G12D/R35H/T121E/R123Q, G12D/R35H/R159E, G12D/R35H/R123Q/R159E, G12D/R35H/R123Q, G12D/R35H/R123F/R159E, G12D/R35H, G12D/R35E/R159E, G12D/R35E/R123Q/R159E, G12D/R35E/R123Q, G12D/R35E, G12D/R35D/R159E, G12D/R35D/R127Q, G12D/R35D/R123Q/R159E, G12D/R35D, G12D/R159E, G12D/R14Q/S15E/R35D, G12D/R14Q/R35H, G12D/R14Q/R35E/R127Q/R159E, G12D/R14Q/R35D/R123H, G12D/R14Q/R159E, G12D/R14I/R35H, G12D/R14E, G12D/R14D/R35H/R123D/R127Q, G12D/R127Q/R159E, G12D/R123E/R159E, R127A/R159K, R14I/G65Q, R14I/G65Q/N67L/R159K, R14I/G65Q/N67L/Y75G/R127A/R159K, R14I/G65Q/R159K, R14I/G65Q/S76V/R127A/R159K, R14I/R127A, R14I/R127A/R159K, R14I/R159K, R14I/R35F, R14I/R35F/G65Q, R14I/R35F/G65Q/R127A/R159K, R14I/R35F/N67L/R127A/R159K, R14I/R35F/R127A/R159K, R14I/R35F/R159K, R14I/S76V, R14I/T36S/G65Q/R127A/R159K, R35F/R127A/R159K, R35F/S76A/R127A; 024A/G049A/A093H/S099N/R127K/A143N/R159K/I181Q, N024A/S076A/A093H/S099G/R127K/R159K, N024A/S076T/A093S/S099G/R127K/R159K, N024E/G049A/A093G/S099G/R127K/A143N/R159K/I181T, N024E/G049A/A093H/R127K/A143N/R159K/I181Q, N024E/G049A/A093H/S099A/R127K/A143N/R159K/I181T/V190I, N024E/G049A/A093S/S099D/R127K/A143N/R159K/I181Q, N024H/G049A/A093T/S099A/R127K/A143N/R159K/I181Q, N024H/S076A/A093G/S099G/R127K/R159K, N024H/S076A/A093H/S099G/R127K/R159K, N024H/S076A/A093S/S099A/R127K/R159K/G054H/L069H, N024H/S076A/A093T/S099G/R127K/R159K, N024H/S076N/A093Q/S099W/R127K/R159K, N024H/S076V/A093Q/S099G/R127K/R159K, N024L/G049A/A093H/S099A/R127K/A143N/R159K/I181Q, N024L/G049A/A093S/S099A/R127K/A143N/R159K/I181Q, N024L/S076V/A093H/S099G/R127K, N024L/S076V/A093S/S099A/R127K/R159K, N024M/G049A/A093G/S099A/R127K/A143N/R159K/I181Q, N024M/G049A/A093H/S099D/R127K/A143N/R59K/I181Q, N024M/G049A/A093S/S099A/R127K/A143N/R159K/I181Q, N024M/G049A/A093S/S099W/R127K/A143N/R159K/I181Q, N024Q/G049A/A093H/S099A/R127K/A143N/R159K/I181T, N024Q/G049A/A093S/S099A/R127K/A143N/R159K/I181Q, N024Q/G049A/A093S/S099A/R127K/A143N/R159K/I181T, N024Q/S076A/A093H/S099A/R127K/R159K/F039N, N024Q/S076A/A093H/S099W/R127K/R159K, N024Q/S076I/A093T/S099G/R159K, N024Q/S076T/A093S/R127K/R159K, N024S/S076A/A093G/S099G/R127K/R159K/G054A, N024S/S076A/A093H/S099T/R127K/R159K, N024S/S076A/A093S/S099W/R127K/R159K, N024S/S076A/A093T/S099W/R127K, N024S/S076T/A093Q/S099W/R127K/R159K, N024S/S076Y/A093T/S099A/R127K/R159K, N024T/G049A/A093G/S099A/R127K/A143N/R159K/I181Q, N024T/G049A/A093H/S099A/R127K/A143N/R159K/I181Q, N024T/G049A/A093H/S099A/R127K/A143N/R159K/I181T, N024T/G049A/A093H/S099D/R127K/A143N/R159K/I181Q, N024T/G049A/A093S/S099A/R127K/A143N/R159K/I181T, N024T/G049A/A093T/S099A/R127K/A143N/R159K/I181T, N024T/S076N/A093Q/S099T/R127K/R159K, N024T/S076T/A093T/S099A/R127K/R159K, N024V/S076A/R127K/R159K, N024V/S076V/A093Q/S099G/R127K/R159K, N024W/A093G/S099W/R127K/R159K, N024W/G049A/A093H/S099A/R127K/A143N/R159K/I181Q, N024W/G049A/A093S/S099A/R127K/A143N/R159K/I181K, N024W/G049A/A093S/S099A/R127K/A143N/R159K/I181Q, N024W/S076A/A093T/S099A/R127K/R159K, N024W/S076I/A093Q/S099G/R127K/R159K, N024W/S076N/A093T/S099G/R159K, N024W/S076T/A093H/S099A/R127K/R159K, N024W/S076T/A093H/S099W/R127K/R159K, N024W/S076V/A093H/S099A/R127K/R159K, N024W/S099W/R127K/R159K, N24A/G54E/S76D/A93G/R127K/R159K, N24E/A93G/R127K/R159K, N24E/G54L/S76E/A93G/R127K/R159K, N24E/G54Q/A93S/R127K/R159K, N24E/S76D/A93T/R127K/R159K, N24H/A93H/R127K/R159K, N24H/G54E/A93G/R127K/R159K, N24H/S76D/A93H/R127K/R159K, N24L/A93G/R127K/R159K, N24L/G54E/A93G/R127K/R159K, N24L/G54L/A93G/R127K/R159K, N24L/G54Q/S76A/A93H/R127K/R159K, N24L/S76T/A93G/R127K/R159K, N24L/S76T/A93H/R127K/R159K, N24M/A93G/R127K/R159K, N24M/A93H/R127K/R159K, N24M/A93S/R127K/R159K, N24M/A93T/R127K/R159K, N24M/G54E/A93H/R127K/R159K, N24M/G54E/S76N/A93S/R127K/R159K, N24M/G54I/A93H/R127K/R159K/S187I, N24Q/A93G/R127K/R159K, N24Q/G54D/A93H/R127K/R159K, N24Q/G54I/A93G/R127K/R159K, N24Q/G54I/S76E/A93H/R127K/R59K, N24Q/G54Q/A93G/R127K/R159K, N24Q/G54Q/S76T/A93H/R127K/R159K, N24Q/S76A/A93G/R127K/R159K, N24T/G54D/S76V/A93G/R127K/R159K, N24T/G54E/S76V/A93H/R127K/R159K, N24T/G54I/A93G/R127K/R159K, N24T/G54N/A93H/R127K/R159K, N24T/G54Q/S76N/A93G/R127K/R159K, N24T/G54Q/S76V/R127K/R159K, N24T/S76I/R127K/R159K, N24T/S76L/A93G/R127K/R159K, N24W/A93G/R127K/R159K, N24W/G54D/A93H/R127K/R159K, N24W/G54I/S76A/A93H/R127K/R159K, N24W/S76A/A93H/R127K/R159K, N24W/S76E/A93G/R127K/R159K, R014I/S076A/A093G/R127K/R159K/I181T, R014I/S076A/A093H/R127K/R159K/I181K, R014I/S076A/A093H/R127K/R159K/I181Q, R014I/S076A/A093H/R127K/R159K/I181T, R014I/S076D/A093H/R127K/R159K/I181Q, R014I/S076D/A093S/R127K/R159K/I181T, R014I/S076E/A093S/R127K/R159K/I181Q, R014I/S076E/A093T/R127K/R159K/I181K, R014I/S076I/A093S/R127K/R159K/I181Q, R014I/S076N/A093H/R127K/R159K/I181Q, R014I/S076T/A093G/R127K/R159K/I181Q, R014K/S076A/A093G/R127K/R159K/I181K, R014K/S076E/A093H/R127K/R159K/I181K, R014K/S076T/A093H/R127K/R159K/I181Q, R014L/S076A/A093H/R127K/R159K, R014L/S076A/A093H/R127K/R159K/I181Q, R014L/S076D/A093H/R127K/R159K/I181T, R014L/S076E/A093H/R127K/R159K/I181K, R014M/S076A/A093G/R127K/R159K/I181K, R014M/S076A/A093G/R127K/R159K/I181T, R014M/S076A/A093H/R127K/R159K/I181T, R014M/S076A/A093S/R127K/R159K/I181K, R014M/S076A/A093S/R127K/R159K/I181T, R014M/S076A/A093T/R127K/R159K/I181Q, R014M/S076D/A093S/R127K/R159K/I181T, R014M/S076E/A093G/R127K/R159K/I181T R014M/S076E/A093H/R127K/R159K/I181T, R014M/S076E/A093S/R127K/R159K/I181T, R014M/S076N/A093G/R127K/R159K/I181K, R014M/S076N/A093G/R127K/R159K/I181T, R014M/S076N/A093H/R127K/R159K/I181Q, R014M/S076N/A093H/R127K/R159K/I181T, R014M/S076N/A093S/R127K/R159K/I181T, R014M/S076N/A093T/R127K/R159K/I181T, R014M/S076T/A093E/R127K/R159K/I181K, R014M/S076V/A093G/R127K/R159K/I181Q, R014M/S076V/A093H/R127K/R159K/I181Q, G54E/R14L, G54L/R127S, N24D/G54F/R127C, N24E/R127S, N24E/R159C, N24G/G54I/R127S, N24H/R159Y/T46I, N24I/R127V/R14V, N24T/R127Q/R179F, R127A/R159V/R179F, R127C/R14W, R127S/R159N/R123L, R14A/N24F/R159L, R14A/R127L, R14A/R127Y/R159W, R14A/R159W, R14C/S114F/R159G, R14F/R127L/R159F, R14F/R127Q/R159W, R14F/R127S/R159V, R14F/R127V/R159F, R14G/N24L/R159G, R14G/N24S/R127C, R14G/R127C/G63E, R14G/R127G, R14G/R127P, R14L/N24S/R159F, R14L/N24V/R127S/R159I, R14L/R123L, R14L/R127C/R159G, R14L/R127S, R14L/R127S/R159G, R14L/R127V, R14L/R127V/R159F, R14I/R127W/R123Y, R14L/R127Y, R14L/R127Y/R159F, R14L/R159G, R14I/R159L, R14L/R159S, R14L/R159V, R14L/R159W, R14M/N24L/R159S/R123V, R14M/R159F, R14Q/R123F, R14S/N24E/R127W, R14S/N24L/R159G, R14S/R127L/R159F, R14S/R127V, R14T/R14P/R159F, R14T/N24A, R14T/N24T/R127Q, R14T/N24T/R127Y/R159W, R14T/R127Y, R14V/N24A/R127I/R159A, R14V/N24D/R127C, R14V/N24G/P189S, R14V/N24S, R14V/N24Y/R127S/R159G, R14V/R127A, R14V/R127C/R159S, R14V/R127M/R159V, R14V/R127S/R159G, R14V/R127T/R159Y, R14V/R127V, R14V/R159F, R14V/R159V, R14V/R159W, R14W/N24T/R123E, R14W/R123L, R14W/R123V, R14W/R127Q/R159W, R14W/R159V, R159V/G49D, G012D/R035E/G065E, G012D/R035E/G065E, G012D/R035E/Q081P, G012D/R035E/R016S/A064T, G012D/R035E/R159W, G012D/R035E/R179I, G012D/R035E/S092T/I181V, R14I/N24A/A64K/R123F/R159E/D184T, R14I/A64K/R123F/R159F/D184T, R14I/A64K/R123F/R159E/D184T, R14I/N24Q/R35E/A64K/R123F/D184T, R14I/N24Q/A64K/N67S/R123F/R159F/D184T, R14I/N24A/R35E/A64K/N67S/R123F/R159E/D184T, R14I/N24A/R35E/A64K/N67S/G78D/R123F/D184T, R14I/N24A/R35D/A64K/G78D/R123F/R127K/R159E/D184T, R14I/N24A/R35D/A64K/R123F/R127K/R159F/D184T, R14I/N24T/R35D/A64K/G78D/R123F/R127Q/R159F/D184T, R14I/A64K/R123F/D184T, R14I/N24A/A64K/R123F/R159N/D184T, R14I/N24Q/R35D/A64K/N67S/R123F/R159K/D184T, R14I/N24E/R35E/A64K/G78D/R123F/R127Q/R159F/D184T, R14I/N24E/A64K/R123F/R127K/R159K/D184T, R14I/N24A/A64K/R123F/D184T, R14I/A64K/R123F/R127K/R159F/D184T, R14I/A64K/R123F/R159E/D184T, R14I/A64K/R123F/R159N/D184T, R14I/A64K/R123F/R159K/D184T, R14I/A64K/R123F/R127Y/R159E/D184T, R14I/N24A/R35E/A64K/N67A/G78D/R123F/D184T, R14I/A64K/R123F/R127Y/R159K/D184T, R14I/N24Q/A64K/R123F/R127Q/R159K/D184T, R14I/A64K/R123F/R159K/D184T, R14I/N24Q/A64K/G78D/R123F/R127Q/R159N/D184T, R14I/N24E/A64K/N67I/G78D/R123F/R159K/D184T, R14I/N24A/R35E/A64K/G78D/R123F/R127K/R159E/D184T, R14I/N24Q/R35D/A64K/N67S/R123F/R159K/D184T, R14I/N24A/R35D/A64K/N67A/R123F/R159F/D184T, R14I/N24E/R35E/G54D/A64K/N67L/G78D/R123F/R127K/D184T, R14I/A64K/G78D/R123F/R127Q/R159N/D184T, R14I/N24A/R35E/A64K/G78D/R123F/R159N/D184T, R14I/A64K/R123F/R127K/R159E/D184T, R14I/N24A/R35E/A64K/N67S/G78D/R123F/R127K/R159F/D184T, R14I/A64K/G78D/R123F/R159E/D184T, R14I/N24E/R35D/A64K/N67A/G78D/R123F/R159K/D184T, N24T/R35D/G78D/R159K, N24T/R35E/N67A/G78D/R127Q, N24Q/R35E, R127K/R159N, R35D/R159E, R35E/G54D/N67S/G78D/R159K, N24Q/G54D/G78D/R159N, R127K/R159E, R127Q/R159K, N24E/R35E/G54D/N67S/R127K/R159N, R35D/G78D/R159K, N67S/R159E, G54D/R127K/R159K, G78D/R127K/R159K, G78D/R127K/R159E, N24E/R35D/G78D/R127K/R159N, R35D/G78D/R127K/R159N, N24A/R35E/G78D/R159N, N24Q/R35D/N67S/R127K/R159E, N24T/R35D/G78D/R159K, N67S/G78D/R127K/R159K, N24Q/R35D/R127K/R159K, N24E/G54D/G78D/R159K, R35D/R159K, R35E/R159K, R127K/R159K, R35E/N67S/G78D/R127Q, N24E/R35D/G78D, R35D/G78D/R127K/R159E, N24E/R35E/G54D/N67S/G78D/R127K/R159K, N24T/N67S/R159E, N24D/R35D/G78D/R159F, N24Q/R35D/N67S/G78D/R127K/R159F, R35D/G78D/R127Q/R159K, G78D/R159F, N24A/N67S/R159K, G78D/R127Q/R159K, N24T/G54D/N67S/G78D/R127Y/R159E, R14I/A63K/G78D/R123F/D184T, R14I/A63K/R123F/R159E/D184T, R14I/A63K/R123F/R159F/D184T, R14I/A63K/R123F/R159K/D184T, R14I/A63K/R123F/R159N/D184T, R14I/A63K/R123K/D184T, R14I/A63K/R123Q/D184T, R14I/A63K/R123Y/D184T, R14I/A64K/G78D/T86K/T116E/R123F, R14I/A64K/T86K/T116E/R123F/R159E, R14I/A64K/T86K/T116E/R123F/R159K, R14I/A64K/T86K/T116E/R123K, R14I/A64K/T86K/T116E/R123Q, R14I/A64K/T86K/T116E/R123Y, R14I/G54D/A63K/R123F/D184T, R14I/G54D/A64K/T86K/T116E/R123F, R14I/G54D/S76N/A93I/R127K/R159K/I181Q, R14I/G54D/S76V/A93S/R127K/R159K/I181K, R14I/N24A/A63K/R123F/D184T, R14I/N24A/A64K/T86K/T116E/R123F, R14I/N24E/A63K/R123F/D184T, R14I/N24E/A64K/T86K/T116E/R123F, R14I/N24Q/A63K/R123F/D184T, R14I/N24Q/A64K/T86K/Y116E/R123F, R14I/N24T/A63K/R123F/D184T, R14I/N24T/A64K/T86K/T116E/R123F, R14I/N24TS76N/A93H/R127K/R159K/I181Q, R14I/N24TS76V/A93S/R127K/R159K/I181K, R14I/N67AS76N/A93H/R127K/R159K/I181Q, R14I/N67LS76N/A93H/R127K/R159K/I181Q, R14I/N67SS76N/A93H/R127K/R159K/I181Q, R14I/R35D/A64K/T86K/T116E/R123F, R14I/R35D/S76N/A93H/R127K/R159K/I181Q, R14I/R35E/A63K/R123F/D184T, R14I/R35E/A64K/T86K/T116E/R123F, R14I/R35E/S76N/A93H/R127K/R159K/I181Q, R14I/R35E/S76V/A93S/R127K/R159K/I181K, R14I/R35K/A63K/R123F/D184T, R14I/S76N/A93H/R127K/R159E/I181Q, R14I/S76N/A93H/R127K/R159F/I181Q, R14I/S76N/A93H/R127K/R159N/I181Q, R14I/S76N/A93H/R127Q/R159K/I181Q, R14I/S76N/A93H/R127Y/R159K/I181Q, R14I/S76N/G78D/A93H/R127K/R159K/I181Q, R14I/S76V/A93S/R127K/R159F/I181K, R14I/S76V/A93S/R127K/R159N/I181K, R14I/S76V/A93S/R127Q/R159K/I181K, R14I/S76V/A93S/R127Y/R159K/I181K, R14M/G54D/S76N/A93G/R127K/R159K/I181K, R14M/N24A/S76N/A93G/R127K/R159K/I181K, R14M/N24E/S76N/A93G/R127K/R159K/I181K, R14M/N24Q/S76N/A93G/R127K/R159K/I181K, R14M/N24T/S76N/A93G/R127K/R159K/I181K, R14M/N67S/S76N/A93G/R127K/R159K/I181K, R14M/R35D/S76N/A93G/R127K/R159K/I181K, R14M/R35E/S76N/A93G/R127K/R159K/I181K, R14M/S76N/A93G/R127K/R159E/I181K, R14M/S76N/A93G/R127K/R159F/I181K, R14M/S76N/A93G/R127K/R159N/I181K, R14M/S76N/A93G/R127Q/R159K/I181K, R14M/S76N/A93G/R127Y/R159K/I181K, and R14M/S76N/G78D/A93G/R127K/R159K/I181K, wherein the substitutions are made at positions equivalent to the positions in a Cellulomonas 69B4 protease comprising the amino acid sequence set forth in SEQ ID NO:8.
The present invention also provides serine protease variants that have improved activity, as compared to wild-type Cellulomonas 69B4 protease comprising the amino acid sequence set forth in SEQ ID NO:8. In some preferred embodiments, the variants have improved caseinolytic activity as compared to wild-type Cellulomonas 69B4 protease comprising the amino acid sequence set forth in SEQ ID NO:8. In some particularly preferred embodiments, the variants comprise multiple substitutions selected from R14L/R79T, G12D/R35H/R159E, G12D/R35H/R123Q, G12D/R35H/R123F/R159E, G12D/R35H, G12D/R35E/R159E, G12D/R35E/R123Q/R159E, G12D/R35E/R123Q, G12D/R35E, G12D/R35D/R159E, G12D/R35D/R123Q/R159E, G12D/R35D, G12D/R159E, G12D/R14Q/R35H, G12D/R14I/R35H, 024E/G049A/A093H/R127K/A143N/R159K/I181Q, N24M/S76V/A93H/R127K/R159K, R14I/N24E/R35D/A64K/N67A/G78D/R123F/R159K/D184T R127A/R159K, R14I/G65Q, and R14V/G65Q/R159K R14I/S76V, wherein the substitutions are made at positions equivalent to the positions in a Cellulomonas 69B4 protease comprising the amino acid sequence set forth in SEQ ID NO:8. In some alternative embodiments, the variants have improved keratinolytic activity as compared to wild-type Cellulomonas 69B4 protease comprising the amino acid sequence set forth in SEQ ID NO:8. In some particularly preferred embodiments, the variants comprise multiple substitutions selected from N024E/G049A/A093H/R127K/A143N/R159K/I181Q, N024E/G049A/A093H/S099A/R127K/A143N/R159K/I181T/V090I, N024E/G049A/A093S/S099D/R127K/A143N/R159K/I181Q, N024Q/G049A/A093S/S099A/R127K/A143N/R159K/I181Q, N024Q/G049A/A093S/S099A/R127K/A143N/R159K/I181T, N024Q/G049A/A093S/S099N/R127K/A143N/R159K/I181Q, N024T/G049A/A093S/S099A/R127K/A143N/R159K/I181T, N024W/G049A/A093S/S099A/R127K/A143N/R159K/I181Q, N24A/G54E/S76D/A93G/R127K/R159K, N24E/A93G/R127K/R159K, N24E/G54L/S76E/A93G/R127K/R159K, N24E/G54Q/A93S/R127K/R159K, N24E/S76D/A93T/R127K/R159K, N24M/G54E/A93H/R127K/R159K, N24M/G54E/S76N/A93S/R127K/R159K, N24Q/A93G/R127K/R159K, N24Q/G54D/S76L/A93G/R127K/R159K, N24Q/G54I/S76E/A93H/R127K/R159K, N24T/G54D/S76V/A93G/R127K/R159K, N24T/G54E/S76V/A93H/R127K/R159K, N24W/G54D/A93H/R127K/R159K, N24W/S76E/A93G/R127K/R159K, R014I/S076A/A093G/R127K/R159K/I181T, R014I/S076A/A093H/R127K/R159K/I181Q, R014I/S076D/A093H/R127K/R159K/I181Q, R014I/S076D/A093H/R127K/R159K/I181T, R014I/S076D/A093S/R127K/R159K/I181T, R014I/S076E/A093S/R127K/R159K/I181Q, R014I/S076E/A093T/R127K/R159K/I181K, R014I/S076I/A093S/R127K/R159K/I181Q, R014I/S076N/A093H/R127K/R159K/I181Q, R014I/S076T/A093G/R127K/R159K/I181Q, R014I/S076V/A093H/R127K/R159K/I181Q, R014K/S076A/A093S/R127K/R159K/I181T, R014K/S076E/A093H/R127K/R159K/I181T, R014K/S076E/A093S/R127K/R159K/I181T, R014K/S076T/A093H/R127K/R159K/I181Q, R014I/S076A/A093H/R127K/R159K, R014L/S076A/A093H/R127K/R159K/I181Q, R014L/S076D/A093H/R127K/R159K/I181T, R014L/S076E/A093H/R127K/R159K/I181K, R014M/S076A/A093G/R127K/R159K/I181T, R014M/S076A/A093H/R127K/R159K/I181T, R014M/S076A/A093S/R127K/R159K/I181K, R014M/S076A/A093S/R127K/R159K/I181T, R014M/S076A/A093T/R127K/R159K/I181Q, R614M/S076D/A093S/R127K/R159K/I181T, R014M/S076E/A093G/R127K/R159K/I181T, R014M/S076E/A093H/R127K/R159K/I181T, R014M/S076E/A093S/R127K/R159K/I181T, R014M/S076N/A093G/R127K/R159K/I181K, R014M/S076N/A093G/R127K/R159K/I181T, R014M/S076N/A093H/R127K/R159K/I181T, R014M/S076N/A093S/R127K/R159K/I181T, R014N/S076V/A093G/R127K/R159K/I181Q, R14I/N24Q/A64K/G78D/R123F/R159K/D184T, R14I/N24A/A64K/N67S/G78D/R123F/R159K/D184T, R14I/N24Q/R35D/A64K/N67S/R123F/R159K/D184T, R14I/N24E/A64K/R123F/R127K/R159K/D184T, R14I/N24Q/A64K/R123F/R127Q/R159K/D184T, R14I/N24Q/A64K/G78D/R123F/R127Q/R159N/D184T, R14I/N24E/A64K/N67L/G78D/R123F/R159K/D184T, R14I/N24Q/R35D/A64K/N67S/R123F/R159K/D184T, R127Q/R159K, G78D/R127K/R159K, N67S/G78D/R127K/R159K, R35D/R159K, G78D/R127Q/R159K, N24A/N67A/R159K, T36S/R127Q/R159E, S15E/T121E/R123Q, S15E/R35H/R159E, S15E/R35E, S15E/R159E, S15E/R123Q, S15E/R123E, R79T/R127Q/R179Q, R35H/R159E, R35H/R127Q/R159E, R35F/R61S/R159Q, R35F/R159Q, R35E/R159E, R35E/R127Q, R35D/R159E, R35D/R127Q, R16Q/R79T/R159Q/R179Q, R16Q/R79T/R127Q, R16Q/R79T/R123L, R16Q/R79T, R16Q/R35F/R123L/R159Q, R16Q/R159Q/R179Q, R16Q/R127Q/R159Q, R16Q/R123L/R159Q, R14Q/T121E, R14Q/R35E/T121E, R14Q/R35E/R159E, R14Q/R35E, R14Q/R35D/R127Q, R14Q/R35D, R14L/R79T/R127Q/R159Q, R14L/R61S/R79T/R123L, R14L/R35F/R61S, R14L/R127Q/R159Q/R179Q, R14L/R123L/R159Q, R14I/R35E/R127Q, R14I/R35E/R123E, R14I/R35D/R159E, R14E/R35H/R127Q, R127Q/R159E, R127Q/R159Q, R123Q/R159E, R123Q/R127Q/R159E, R123L/R159Q, R123L/R127Q/R159Q, R123F/R159E, R123E/R127Q/R159E, R123E/R127Q, G12D/S15E/R35H/R159E, G12D/S15E/R35D, G12D/S15E/R159E, G12D/S15E, G12D/R35H/T121E/R123Q, G12D/R35H/R159E, G12D/R35H/R127Q/R159E, G12D/R35H/R123Q, G12D/R35H/R123F/R159E, G12D/R35H, G12D/R35E/R159E, G12D/R35E/R123Q/R159E, G12D/R35E/R123Q, G12D/R35E, G12D/R35D/R159E, G12D/R35D/R127Q, G12D/R35D, G12D/R159E, G12D/R14Q/R35H, G12D/R14Q/R35D/R123H, G12D/R14Q/R159E, G12D/R14I/R35H, G12D/R14E, G12D/R127Q/R159E, G12D/R123E/R159E, R127A/R159K, R14I/G65Q, R14I/G65Q/R127A/R159K, R14I/G65Q/R159K, R14I/R127A, R14I/R127A/R159K, R14I/R159K, R14I/R35F, R14I/R35F/G65Q, R14I/R35F/G65Q/R127A/R159K, R14I/R35F/R159K, R14I/S76V, R14I/T36S/G65Q/R127A/R159K, and R35F/R127A/R159K, wherein the substitutions are made at positions equivalent to the positions in a Cellulomonas 69B4 protease comprising the amino acid sequence set forth in SEQ ID NO:8.
The present invention also provides serine protease variants that have improved wash performance activity as compared to wild-type Cellulomonas 69B4 protease comprising the amino acid sequence set forth in SEQ ID NO:8. In some preferred embodiments, the variants comprise multiple substitutions selected from N24F/R159G, /N24F/R159L/R123V, N24I/R127S, /N24L/R159S, N24S/R159A, N24V/R159L, N24Y/R159F, R14A/N24K/R127S, R14A/R159W, R14L/N24Y, R14L/R159G, R14L/R159S, R14L/T109M, R14L/T39P, R14M/R159W, R14S/N24V, R14S/N24Y, R14T/N24A, R14V/N24G/P189S, R14V/R159W, R127A/R159K, R14I/G65Q, R14I/S76V, R14I/G65Q/N67L/R159K, R14I/G65Q/R159K, R14I/S76V, R35F/R159Q, R16Q/R79T, R16Q/R35F, R16Q/R159Q, R14L/R79T, R123L/R159Q, G12D/S15E, G12D/R35H, G12D/R35D, N024E/G049A/A093H/R127K/A143N/R159K/I181Q, N024H/S076A/A093S/S099A/R127K/R159K/G054H/L069H, N024H/S076A/A093T/S099G/R127K/R159K, N024L/S076V/A093S/S099A/R127K/R159K, N024Q/G049A/A093S/S099A/R127K/A143N/R159K/I181T, N024T/G049A/A093S/S099A/R127K/A143N/R159K/I181T, N24E/G54Q/A93S/R127K/R159K, N24H/A93H/R127K/R159K, N24H/G54L/S76V/A93H/R127K/R159K, N24L/G54Q/S76A/A93H/R127K/R159K, N24M/A93G/R127K/R159K, N24M/G54E/A93H/R127K/R159K, N24M/S76V/A93H/R127K/R159K, N24Q/G54Q/S76T/A93H/R127K/R159K, N24Q/S76A/A93G/R127K/R159K, N24T/G54Q/S76N/A93G/R127K/R159K, N24T/S76I/R127K/R159K, N24W/G54D/A93G/R127K/R159K, N24W/S76A/A93H/R127K/R159K, N24W/S76T/A93G/R127K/R159K, N24W/S76V/A93G/R127K/R159K, N24W/S76Y/A93G/R127K/R159K, R014I/S076A/A093G/R127K/R159K/I181T, R014I/S076A/A093H/R127K/R159K/I181K, R014I/S076A/A093H/R127K/R159K/I181Q, R014I/S076A/A093H/R127K/R159K/I181T, R014I/S076D/A093S/R127K/R159K/I181T, R014I/S076E/A093T/R127K/R159K/I181K, R014I/S076N/A093H/R127K/R159K/I181Q, R014I/S076V/A093H/R127K/R159K/I181Q, R014I/S076V/A093S/R127K/R159K/I181K, R014K/S076A/A093S/R127K/R159K/I181T, R014K/S076E/A093E/R127K/R159K/I181K, R014K/S076I/A093S/R127K/R159K/I181T, R014K/S076T/A093H/R127K/R159K/I181K, R014K/S076T/A093H/R127K/R159K/I181T, R014K/S076V/A093H/R127K/R159K/I181K, R014L/S076A/A093H/R127K/R159K, R014L/S076A/A093H/R127K/R159K/I181Q, R014L/S076D/A093H/R127K/R159K/I181T, R014L/S076E/A093H/R127K/R159K/I181K, R014M/S076A/A093G/R127K/R159K/I181K, R014M/S076A/A093G/R127K/R159K/I181T, R014M/S076A/A093H/R127K/R159K/I181T, R014M/S076A/A093S/R127K/R159K/I181K, R014M/S076A/A093S/R127K/R159K/I181T, R014M/S076A/A093T/R127K/R159K/I181Q, R014M/S076I/A093H/R127K/R159K/I181T, R014N/S076I/A093S/R127K/R159K/I181T, R014M/S076N/A093G/R127K/R159K/I181K, R014N/S076N/A093G/R127K/R159K/I181T, R014M/S076N/A093H/R127K/R159K/I181T, R014N/S076N/A093S/R127K/R159K/I181T, R014N/S076T/A093H/R127K/R159K/I181K, R014M/S076V/A093G/R127K/R159K/I181Q, R014M/S076W/A093H/R127K/R159K/I181K, R014M/S076Y/A093H/R127K/R159K/I181K, R014M/S076Y/A093H/R127K/R159K/I181T, G012D/R035E/D184N, G012D/R035E/N067K, R14I/A64K/R123F/R159F/D184T, R14I/A64K/R123F/R159F/D184T, R14I/N24Q/A64K/G78D/R123F/R159K/D184T, R14I/N24Q/A64K/N67S/R123F/R159F/D184T, R14I/N24Q/A64K/N67A/R123F/R159K/D184T, R14I/N24A/A64K/N67S/G78D/R123F/R159K/D184T, R14I/A64K/R123F/D184T, R14I/N24A/A64K/R123F/R159N/D184T, R14I/N24Q/R35D/A64K/N67S/R123F/R159K/D184T, R14I/N24Q/A64K/N67A/R123F/R159K/D184T, R14I/N24E/A64K/R123F/R127K/R159K/D184T, R14I/N24A/A64K/R123F/D184T, R14I/A64K/R123F/R127K/R159F/D184T, R14I/A64K/R123F/R159N/D184T, R14I/A64K/R123F/R159K/D184T, R14I/A64K/R123F/R127Y/R159K/D184T, R14I/N24Q/A64K/R123F/R127Q/R159K/D184T, R14I/A64K/R123F/R159K/D184T, R14I/N24Q/R35D/A64K/N67S/R123F/R159K/D184T, R14I/A64K/N67S/G78D/R123F/R127K/R159K/D184T, R14I/N24Q/A64K/N67A/R123F/R127K/R159K/D184T, R127K/R159K, N24A/N67S/R159K, N24A/N67A/R159K, R14I/A63K/G78D/R123F/D184T, R14I/A63K/N67A/R123F/D184T, R14I/A63K/N67L/R123F/D184T, R14I/A63K/N67S/R123F/D184T, R14I/A63K/R123F/R159F/D184T, R14I/A63K/R123F/R159K/D184T, R14I/A63K/R123F/R159N/D184T, R14I/A63K/R123K/D184T, R14I/A63K/R123Q/D184T, R14I/A63K/R123Y/D184T, R14I/A64K/G78D/T86K/T116E/R123F, R14I/A64K/N67A/T86K/T116E/R123F, R14I/A64K/N67L/T86K/T116E/R123F, R14I/A64K/T86K/T116E/R123F/R159K, R14I/A64K/T86K/T116E/R123K, R14I/G54D/A63K/R123F/D184T, R14I/G54D/A64K/T86K/T116E/R123F, R14I/N24A/A63K/R123F/D184T, R14I/N24A/A64K/T86K/T116E/R123F, R14I/N24A/S76V/A93S/R127K/R159K/I181K, R14I/N24E/A63K/R123F/D184T, R14I/N24E/A64K/T86K/T116E/R123F, R14I/N24Q/A63K/R123F/D184T, R14I/N24Q/A64K/T86K/T116E/R123F, R14I/N24Q/S76V/A93S/R127K/R159K/I181K, R14I/N24T/A63K/R123F/D184T, R14I/N24T/A64K/T86K/T116E/R123F, R14I/N24TS76V/A93S/R127K/R159K/I181K, R14I/N67SS76N/A93H/R127K/R159K/I181Q, R14I/R35E/A63K/R123F/D184T, R14I/R35K/A63K/R123F/D184T, R14I/S76V/A93S/R127K/R159F/I181K, R14I/S76V/A93S/R127K/R159N/I181K, R14I/S76V/A93S/R127Y/R159K/I181K, R14M/N24T/S76N/A93G/R127K/R159K/I181K, R14M/N67S/S76N/A93G/R127K/R159K/I181K, R14M/S76N/A93G/R127K/R159F/I181K, and R14M/S76N/G78D/A93G/R127K/R159K/I181K, wherein the substitutions are made at positions equivalent to the positions in a Cellulomonas 69B4 protease comprising the amino acid sequence set forth in SEQ ID NO:8. In some embodiments, the variants have improved dishwashing performance activity as compared to wild-type Cellulomonas 69B4 protease comprising the amino acid sequence set forth in SEQ ID NO:8. In some preferred embodiments, the variants comprise multiple substitutions selected from R14N/R127K/R159L, R14I/A64K/T86K/N112E/R123F/D184T, G12D/R35E/G63R/R79K/T109M, R14L, G12D/R35E, and R14M/S76D/A93H/R127K/R159K/I181K, wherein the substitutions are made at positions equivalent to the positions in a Cellulomonas 69B4 protease comprising the amino acid sequence set forth in SEQ ID NO:8. In some still further embodiments, the variants have improved stain removal activity as compared to wild-type Cellulomonas 69B4 protease comprising the amino acid sequence set forth in SEQ ID NO:8. In some preferred embodiments, the variants comprise multiple substitutions selected from: G54E/R14L, N24D/R127Y/R159V, N24E/R127S, N24E/R159C, N24F/R159G, N24F/R159G/G54E, N24F/R159L/R123V, N24G/R127Y, N24H/R159Y/T46I, N24I/R127S, N24I/R127V/R14/N24L/R159S, N24S/R159A, N24V/R127M/R159V, N24V/R127S/R159H, N24V/R159L, N24Y/G54A/N24Y/R127L, N24Y/R127S, N24Y/R127V, N24Y/R159F, R127A/R159F, R127H/R159Q, R127H/R159T/S185F, R127M/R159V, R127S/R159G, R127S/R159L, R127T/R159F, R127V/R159G, R127Y/R159L, R14A/N24K/R127S, R14A/R127Y/R159W, R14G/N24S/R127C, R14G/R127G, R14L/N24D, R14I/N24Y, R14L/R123L, R14L/R127S, R14I/R127V, R14L/R127Y, R14L/R159G, R14L/R159S, R14L/T39P, R14M/N24L/R159S/R123V, R14M/R159F, R14M/R159W, R14Q/R123F, R14S/N24E/R127W, R14S/N24V, R14S/N24Y, R14T/N24T/R127Q, R14T/R127Y, R14V/N24D/R127C, R14V/N24G/P189S, R14V/N24L/R127F, R14V/R127A, R14V/R159F, R14V/R159W, R14W/N24A, R14W/R123L, R14W/R123V, R14W/R159V, R159V/G49D, R159V/R123G, N024E/G049A/A093H/R127K/A143N/R159K/I181Q, N024E/G049A/A093S/S099D/R127K/A143N/R159K/I181Q, N024Q/G049A/A093S/S099A/R127K/A143N/R159K/I181T, N24A/G54E/S76D/A93G/R127K/R159K, N24E/A93G/R127K/R159K, N24E/G54L/S76E/A93G/R127K/R159K, N24E/G54Q/A93S/R127K/R159K, N24E/S76D/A93T/R127K/R159K, N24H/G54E/A93G/R127K/R159K, N24L/S76T/A93G/R127K/R159K, N24M/A93S/R127K/R159K, N24M/A93T/R127K/R159K, N24M/G54E/A93H/R127K/R159K, N24M/G54E/S76N/A93S/R127K/R159K, N24M/S76V/A93H/R127K/R159K, N24Q/A93G/R127K/R159K, N24Q/G54D/S76L/A93G/R127K/R159K, N24Q/G54I/S76T/A93G/R127K/R159K, N24Q/G54Q/A93G/R127K/R159K, N24Q/S76A/A93G/R127K/R159K, N24T/G54Q/S76N/A93G/R127K/R159K, N24T/G54Q/S76V/R127K/R159K, N24T/S76I/R127K/R159K, N24W/A93G/R127K/R159K, N24W/G54D/A93H/R127K/R159K, R014I/S076A/A093G/R127K/R159K/I181T, R014I/S076A/A093H/R127K/R159K/I181Q, R014I/S076D/A093H/R127K/R159K/I181Q, R014I/S076D/A093H/R127K/R159K/I181T, R014I/S076D/A093S/R127K/R159K/I181T, R014I/S076E/A093S/R127K/R159K/I181Q, R014I/S076E/A093T/R127K/R159K/I181K, R014I/S076N/A093H/R127K/R159K/I181Q, R014L/S076A/A093H/R127K/R159K, R014L/S076A/A093H/R127K/R159K/I181Q, R014L/S076D/A093H/R127K/R159K/I181T, R014M/S076A/A093G/R127K/R159K/I181T, R014M/S076A/A093S/R127K/R159K/I181K, R014M/S076A/A093S/R127K/R159K/I181T, R014M/S076A/A093T/R127K/R159K/I181Q, R014M/S076D/A093S/R127K/R159K/I181T, R014M/S076E/A093E/R127K/R159K/I181T, R014M/S076E/A093S/R127K/R159K/I181T, R014I/S076N/A093G/R127K/R159K/I181K, R014M/S076N/A093G/R127K/R159K/I181T, R014M/S076N/A093H/R127K/R159K/I181T, R014M/S076N/A093S/R127K/R159K/I181T, T36S/R127Q/R159E, S15E/R35E, S15E/R35D, S15E/R159E, S15E/R127Q, S15E/R123Q, S15E/R123E, R79T/R127Q/R179Q, R35H/R159E, R35F/R61S/R159Q, R35F/R159Q, R35D/R127Q, R16Q/R79T/R159Q/R179Q, R16Q/R79T/R123L, R16Q/R79T, R16Q/R35F, R16Q/R159Q/R179Q, R16Q/R159Q, R14Q/T121E, R14Q/R35E, R14Q/R35D, R14Q/R123Q, R14L/R79T, R127Q/R159E, R127Q/R159Q, R123Q/R159E, R123L/R159Q, R123F/R159E, G12D/S15E, G12D/R35H/R159E, G12D/R35H/R123Q, G12D/R35H, G12D/R35E, G12D/R35D, G12D/R159E, G12D/R14Q/R35H, G12D/R14I/R35H, G65Q/R127A/R159K, R127A/R159K, R14I/G65Q, R14I/G65Q/N67L/R159K, R14I/G65Q/R127A, R14I/G65Q/R127A/R159K, R14I/G65Q/R159K, R14I/R127A, R14I/R127A/R159K, R14I/R159K, R14I/R35F, R14I/R35F/G65Q, R14I/R35F/R159K, R14I/S76V, and R35F/R127A/R159K, wherein the substitutions are made at positions equivalent to the positions in a Cellulomonas 69B4 protease comprising the amino acid sequence set forth in SEQ ID NO:8.
The present invention also provides serine protease variants that have at least one altered surface property, as compared to wild-type Cellulomonas 69B4 protease comprising the amino acid sequence set forth in SEQ ID NO:8. In some preferred embodiments, the variants comprise at least two substitutions at sites selected from the group consisting of 1, 2, 4, 7, 8, 10, 11, 12, 13, 14, 15, 16, 22, 24, 25, 32, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 57, 59, 61, 62, 63, 64, 65, 66, 67, 68, 69, 71, 73, 74, 75, 76, 77, 78, 79, 80, 81, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 95, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 123, 124, 126, 127, 128, 130, 131, 132, 133, 134, 135, 137, 143, 144, 145, 146, 147, 148, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 170, 111, 173, 174, 175, 176, 177, 178, 179, 180, 181, 182, 183, and 184, wherein the substitutions are made at positions equivalent to the positions in a Cellulomonas 69B4 protease comprising the amino acid sequence set forth in SEQ ID NO:8
In some particularly preferred embodiments, the variant proteases have at least one improved property as compared to the wild-type Cellulomonas 69B4 protease comprising the amino acid sequence set forth in SEQ ID NO:8. In some particularly preferred embodiments, the at least one improved property is selected from the group consisting of acid stability, thermostability, casein hydrolysis, keratin hydrolysis, cleaning performance, and LAS stability.
The present invention also provides expression vectors comprising a polynucleotide sequence encoding the serine protease variants having an amino acid sequence comprising at least two amino acid substitutions, wherein the substitutions are made at positions equivalent to positions in a Cellulomonas 69B4 protease comprising the amino acid sequence set forth in SEQ ID NO:8. The present invention also provides host cells comprising at least one expression vector. In some preferred embodiments, the host cell is a Bacillus sp., while in some other embodiments, the host cell is a Streptomyces sp., in yet some other embodiments, the host cell is an Aspergillus sp., and in some still further embodiments, the host cell is a Trichoderma sp. The present invention also provides serine protease variants produced the host cells.
The present invention also provides compositions comprising at least a portion of the serine protease variants having an amino acid sequence comprising at least two amino acid substitutions, wherein the substitutions are made at positions equivalent to the positions in a Cellulomonas 69B4 protease comprising the amino acid sequence set forth in SEQ ID NO:8, provided herein.
The present invention also further provides polynucleotide sequences encoding the serine protease variants having amino acid sequences comprising at least two amino acid substitutions, wherein the substitutions are made at positions equivalent to positions in a Cellulomonas 69B4 protease comprising the amino acid sequence set forth in SEQ ID NO:8. The present invention further provides expression vectors comprising a polynucleotide sequence encoding the serine protease variants having an amino acid sequence comprising at least two amino acid substitutions, wherein the substitutions are made at positions equivalent to positions in a Cellulomonas 69B4 protease comprising the amino acid sequence set forth in SEQ ID NO:8. The present invention also provides host cells comprising at least one expression vector. In some preferred embodiments, the host cell is a Bacillus sp., while in some other embodiments, the host cell is a Streptomyces sp., in yet some other embodiments, the host cell is an Aspergillus sp., and in some still further embodiments, the host cell is a Trichoderma sp. The present invention also provides serine protease variants produced the host cells.
The present invention further provides cleaning compositions comprising serine protease variants having amino acid sequences comprising at least two amino acid substitutions, wherein the substitutions are made at positions equivalent to the positions in a Cellulomonas 69B4 protease comprising the amino acid sequence set forth in SEQ ID NO:8. In some preferred embodiments, the cleaning compositions comprise at least one variant serine protease, wherein the serine protease has immunological cross-reactivity with the serine protease set forth in SEQ ID NO:8. In some preferred embodiments, the substitutions are made at positions equivalent to positions 1, 2, 3, 4, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 18, 19, 22, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 51, 52, 54, 55, 56, 57, 59, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 96, 99, 100, 101, 103, 104, 105, 107, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 121, 123, 124, 125, 126, 127, 128, 129, 130, 132, 133, 134, 135, 136, 131, 140, 141, 142, 143, 144, 145, 146, 147, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 170, 171, 172, 175, 176, 177, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, and 189, in a Cellulomonas 69B4 protease comprising the amino acid sequence set forth in SEQ ID NO:8. In some preferred embodiments, the cleaning compositions further comprise one or more additional enzymes or enzyme derivatives selected from the group consisting of proteases, amylases, lipases, mannanases, pectinases, cutinases, oxidoreductases, hemicellulases, and cellulases.
The present invention also provides compositions comprising the serine protease variants having amino acid sequences comprising at least two amino acid substitutions, wherein the substitutions are made at positions equivalent to the positions in a Cellulomonas 69B4 protease comprising the amino acid sequence set forth in SEQ ID NO:8, and at least one stabilizing agent. In some preferred embodiments, the compositions are cleaning compositions. In some particularly preferred embodiments, the stabilizing agent is selected from borax, glycerol, and competitive inhibitors. In some further particularly preferred embodiments, the competitive inhibitors stabilize the serine protease variants to anionic surfactants. In some still further embodiments, the serine protease variant is an autolytically stable variant.
The present invention also provides cleaning compositions comprising at least 0.0001 weight percent of the serine protease variants having amino acid sequences comprising at least two amino acid substitutions, wherein the substitutions are made at positions equivalent to the positions in a Cellulomonas 69B4 protease comprising the amino acid sequence set forth in SEQ ID NO:8, and optionally, an adjunct ingredient. In some preferred embodiments, the compositions comprise from about 0.001 to about 0.5 weight percent of at least one serine protease variant. In some preferred embodiments, the compositions comprise from about 0.01 to about 0.1 weight percent of the serine protease. In some additional preferred embodiments, the cleaning compositions comprise an adjunct ingredient. In some still further preferred embodiments, the cleaning compositions comprise a sufficient amount of a pH modifier to provide the composition with a neat pH of from about 3 to about 5, wherein the compositions are essentially free of materials that hydrolyze at a pH of from about 3 to about 5. In some alternative preferred embodiments, the cleaning compositions comprise materials that hydrolyze comprise a surfactant material. In some particularly preferred embodiments, the surfactant material comprises a sodium alkyl sulfate surfactant that comprises an ethylene oxide moiety.
The present invention further provides cleaning compositions comprising the serine protease variants having amino acid sequences comprising at least two amino acid substitutions, wherein the substitutions are made at positions equivalent to the positions in a Cellulomonas 69B4 protease comprising the amino acid sequence set forth in SEQ ID NO:8, wherein the cleaning composition is a liquid. In some alternative embodiments, the cleaning composition is a powder, granular or tablet composition.
The present invention further provides cleaning compositions comprising the serine protease variants having amino acid sequences comprising at least two amino acid substitutions, wherein the substitutions are made at positions equivalent to the positions in a Cellulomonas 69B4 protease comprising the amino acid sequence set forth in SEQ ID NO:8, wherein the cleaning compositions further comprise a hydrogen peroxide source. In some preferred embodiments, the hydrogen peroxide source comprises at least one persalt, wherein the persalt is alkalimetal perborate, alkalimetal percarbonate, alkalimetal perphosphate, alkalimetal persulfate, or a mixture thereof. In some particularly preferred embodiments, the cleaning compositions further comprise a bleach catalyst, bleach activator and/or mixtures thereof.
The present invention also provides methods of cleaning, comprising the steps of: a) contacting a surface and/or an article comprising a fabric with at least one cleaning composition of the present invention; and b) optionally washing and/or rinsing the surface or material.
The present invention also provides animal feeds comprising serine protease variants having amino acid sequences comprising at least two amino acid substitutions, wherein the substitutions are made at positions equivalent to the positions in a Cellulomonas 69B4 protease comprising the amino acid sequence set forth in SEQ ID NO:8.
The present invention also provides textile and/or leather processing compositions comprising serine protease variants having amino acid sequences comprising at least two amino acid substitutions, wherein the substitutions are made at positions equivalent to the positions in a Cellulomonas 69B4 protease comprising the amino acid sequence set forth in SEQ ID NO:8.
The present invention also provides personal care compositions comprising serine protease variants having amino acid sequences comprising at least two amino acid substitutions, wherein the substitutions are made at positions equivalent to the positions in a Cellulomonas 69B4 protease comprising the amino acid sequence set forth in SEQ ID NO:8.



DESCRIPTION OF THE FIGURES
FIG. 1 provides a map of the plasmid pHPLT-ASP-C1-2.
FIG. 2 provides a map of the plasmid pXX-KpnI.
FIG. 3 provides a map of the plasmid pHPLT.
FIG. 4 provides a map of the plasmid pUC18.
FIG. 5 provides a map of the plasmid pUC18-ASP
FIG. 6 provides a table showing the results from tergotometer tests performed in the absence of HEPES Buffer (enzyme dosage was 0.55 ppm).
FIG. 7 provides a table showing the results from tergotometer tests performed in the presence of HEPES buffer (enzyme dosage was 0.55 ppm).



DESCRIPTION OF THE INVENTION
The present invention provides novel-Micrococcineae spp serine proteases having multiple substitutions. In particular, the present invention provides serine proteases having multiple substitutions, DNA encoding these proteases, vectors comprising the DNA encoding the proteases, host cells transformed with the vector DNA, and enzymes produced by the host cells. The present invention also provides cleaning compositions (e.g., detergent compositions), animal feed compositions, and textile and leather processing compositions comprising these serine protease variants. In particularly preferred embodiments, the present invention provides mutant (i.e., variant) proteases derived from the wild-type proteases described herein. These variant proteases also find use in numerous applications.
The present invention provides variant protease enzymes having multiple substitutions. Importantly, these variant enzymes have good stability and proteolytic activity. These variant enzymes find use in various applications including but not limited to cleaning compositions, animal feed, textile processing and etc. The present invention also provides means to produce these enzymes. In some preferred embodiments, the variant proteases of the present invention are in pure or relatively pure form.
The present invention also provides nucleotide sequences which are suitable to produce the variant proteases of the present invention in recombinant organisms. In some embodiments, recombinant production provides means to produce the variant proteases in quantities that are commercially viable.
Unless otherwise indicated, the practice of the present invention involves conventional techniques commonly used in molecular biology, microbiology, and recombinant DNA, which are within the skill of the art. Such techniques are known to those of skill in the art and are described in numerous texts and reference works (See e.g., Sambrook et al., “Molecular Cloning: A Laboratory Manual”, Second Edition (Cold Spring Harbor), [1989]); and Ausubel et al., “Current Protocols in Molecular Biology” [1987]). All patents, patent applications, articles and publications mentioned herein, both supra and infra, are hereby expressly incorporated herein by reference.
Unless defined otherwise herein, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. For example, Singleton and Sainsbury, Dictionary of Microbiology and Molecular Biology, 2d Ed., John Wiley and Sons, NY (1994); and Hale and Marham, The Harper Collins Dictionary of Biology, Harper Perennial, N.Y. (1991) provide those of skill in the art with a general dictionaries of many of the terms used in the invention. Although any methods and materials similar or equivalent to those described herein find use in the practice of the present invention, the preferred methods and materials are described herein. Accordingly, the terms defined immediately below are more fully described by reference to the Specification as a whole. Also, as used herein, the singular “a”, “an” and “the” includes the plural reference unless the context clearly indicates otherwise. Numeric ranges are inclusive of the numbers defining the range. Unless otherwise indicated, nucleic acids are written left to right in 5′ to 3′ orientation; amino acid sequences are written left to right in amino to carboxy orientation, respectively. It is to be understood that this invention is not limited to the particular methodology, protocols, and reagents described, as these may vary, depending upon the context they are used by those of skill in the art.
The practice of the present invention employs, unless otherwise indicated, conventional techniques of protein purification, molecular biology, microbiology, recombinant DNA techniques and protein sequencing, all of which are within the skill of those in the art.
Furthermore, the headings provided herein are not limitations of the various aspects or embodiments of the invention which can be had by reference to the specification as a whole. Accordingly, the terms defined immediately below are more fully defined by reference to the specification as a whole. Nonetheless, in order to facilitate understanding of the invention, a number of terms are defined below. Additional definitions are provided in U.S. patent application Ser. No. 10/576,331, which is incorporated by reference in its entirety.
I. Definitions
As used herein, the terms “protease,” and “proteolytic activity” refer to a protein or peptide exhibiting the ability to hydrolyze peptides or substrates having peptide linkages. Many well known procedures exist for measuring proteolytic activity (Kalisz, “Microbial Proteinases,” In: Fiechter (ed.), Advances in Biochemical Engineering/Biotechnology, [1988]). For example, proteolytic activity may be ascertained by comparative assays which analyze the respective protease's ability to hydrolyze a commercial substrate. Exemplary substrates useful in the analysis of protease or protelytic activity, include, but are not limited to di-methyl casein (Sigma C-9801), bovine collagen (Sigma C-9879), bovine-elastin (Sigma E-1625), and bovine keratin (ICN Biomedical 902111). Colorimetric assays utilizing these substrates are well known in the art (See e.g., WO 99/34011; and U.S. Pat. No. 6,376,450, both of which are incorporated herein by reference). The pNA assay (See e.g., Del Mar et al., Anal. Biochem., 99:316-320 [1979]) also finds use in determining the active enzyme concentration for fractions collected during gradient elution. This assay measures the rate at which p-nitroaniline is released as the enzyme hydrolyzes the soluble synthetic substrate, succinyl-alanine-alanine-proline-phenylalanine-p-nitroanilide (sAAPF-pNA). The rate of production of yellow color from the hydrolysis reaction is measured at 410 nm on a spectrophotometer and is proportional to the active enzyme concentration. In addition, absorbance measurements at 280 nm can be used to determine the total protein concentration. The active enzyme/total-protein ratio gives the enzyme purity.
As used herein, the terms “ASP protease,” “Asp protease,” and “Asp,” refer to the serine proteases described herein. In some preferred embodiments, the Asp protease is the protease designed herein as 69B4 protease obtained from Cellulomonas strain 69B4. Thus, in preferred embodiments, the term “69B4 protease” refers to a naturally occurring mature protease derived from Cellulomonas strain 69B4 (DSM 16035) having substantially identical amino acid sequences as provided in SEQ ID NO:8. In alternative embodiments, the present invention provides portions of the ASP protease.
The term “Cellulomonas protease homologues” refers to naturally occurring proteases having substantially identical amino acid sequences to the mature protease derived from Cellulomonas strain 69B4 or polynucleotide sequences which encode for such naturally occurring proteases, and which proteases retain the functional characteristics of a serine protease encoded by such nucleic acids. In some embodiments, these protease homologues are referred to as “cellulomonadins.”
As used herein, the terms “protease variant,” “ASP variant,” “ASP protease variant,” and “69B protease variant” are used in reference to proteases that are similar to the wild-type ASP, particularly in their function, but have mutations (e.g., substitutions) in their amino acid sequence that make them different in sequence from the wild-type protease. Some of the amino acid residues identified for substitution are conserved residues whereas others are not. In some embodiments, the protease variants of the present invention include the mature forms of protease variants, while in other embodiments, the present invention provides the pro- and prepro-forms of such protease variants.
As used herein, “Cellulomonas ssp.” refers to all of the species within the genus “Cellulomonas,” which are Gram-positive bacteria classified as members of the Family Cellulomon adaceae, Suborder Micrococcineae, Order Actinomycetales, Class Actinobacteria. It is recognized that the genus Cellulomonas continues to undergo taxonomical reorganization. Thus, it is intended that the genus include species that have been reclassified.
As used herein, “Streptomyces ssp.” refers to all of the species within the genus “Streptomyces,” which are Gram-positive bacteria classified as members of the Family Streptomycetaceae, Suborder Streptomycineae, Order Actinomycetales, class Actinobacteria. It is recognized that the genus Streptomyces continues to undergo taxonomical reorganization. Thus, it is intended that the genus include species that have been reclassified.
As used herein, “the genus Bacillus” includes all species within the genus “Bacillus,” as known to those of skill in the art, including but not limited to B. subtilis, B. licheniformis, B. lentus, B. brevis, B. stearothermophilus, B. alkalophilus, B. amyloliquefaciens, B. clausii, B. halodurans, B. megaterium, B. coagulans, B. circulans, B. lautus, and B. thuringiensis. It is recognized that the genus Bacillus continues to undergo taxonomical reorganization. Thus, it is intended that the genus include species that have been reclassified, including but not limited to such organisms as B. stearothermophilus, which is now named “Geobacillus stearothermophilus.” The production of resistant endospores in the presence of oxygen is considered the defining feature of the genus Bacillus, although this characteristic also applies to the recently named Alicyclobacillus, Amphibacillus, Aneurinibacillus, Anoxybacillus, Brevibacillus, Filobacillus, Gracilibacillus, Halobacillus, Paenibacillus, Salibacillus, Thermobacillus, Ureibacillus, and Virgibacillus. 
The terms “polynucleotide” and “nucleic acid,” used interchangeably herein, refer to a polymeric form of nucleotides of any length, either ribonucleotides or deoxyribonucleotides. These terms include, but are not limited to, a single-, double- or triple-stranded DNA, genomic DNA, cDNA, RNA, DNA-RNA hybrid, or a polymer comprising purine and pyrimidine bases, or other natural, chemically, biochemically modified, non-natural or derivatized nucleotide bases. The following are non-limiting examples of polynucleotides: genes, gene fragments, chromosomal fragments, ESTs, exons, introns, mRNA, tRNA, rRNA, ribozymes, cDNA, recombinant polynucleotides, branched polynucleotides, plasmids, vectors, isolated DNA of any sequence, isolated RNA of any sequence, nucleic acid probes, and primers. In some embodiments, polynucleotides comprise modified nucleotides, such as methylated nucleotides and nucleotide analogs, uracyl, other sugars and linking groups such as fluororibose and thioate, and nucleotide branches. In alternative embodiments, the sequence of nucleotides is interrupted by non-nucleotide components.
As used herein the term “gene” refers to a polynucleotide (e.g., a DNA segment), that encodes a polypeptide and includes regions preceding and following the coding regions as well as intervening sequences (introns) between individual coding segments (exons).
As used herein, “homologous genes” refers to a pair of genes from different, but usually related species, which correspond to each other and which are identical or very similar to each other. The term encompasses genes that are separated by speciation (i.e., the development of new species) (e.g., orthologous genes), as well as genes that have been separated by genetic duplication (e.g., paralogous genes).
As used herein, “homology” refers to sequence similarity or identity, with identity being preferred. This homology is determined using standard techniques known in the art (See e.g., Smith and Waterman, Adv. Appl. Math., 2:482 [1981]; Needleman and Wunsch, J. Mol. Biol., 48:443 [1970]; Pearson and Lipman, Proc. Natl. Acad. Sci. USA 85:2444 [1988]; programs such as GAP, BESTFIT, FASTA, and TFASTA in the Wisconsin Genetics Software Package (Genetics Computer Group, Madison, Wis.); and Devereux et al., Nucl. Acid Res., 12:387-395 [1984]).
As used herein, an “analogous sequence” is one wherein the function of the gene is essentially the same as the gene based on the Cellulomonas strain 69B4 protease. Additionally, analogous genes include at least 45%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, 95%, 97%, 98%, 99% or 100% sequence identity with the sequence of the Cellulomonas strain 69B4 protease. Alternately, analogous sequences have an alignment of between 70 to 100% of the genes found in the Cellulomonas strain 69B4 protease region and/or have at least between 5-10 genes found in the region aligned with the genes in the Cellulomonas strain 69B4 chromosome. In additional embodiments more than one of the above properties applies to the sequence. Analogous sequences are determined by known methods of sequence alignment. A commonly used alignment method is BLAST, although as indicated above and below, there are other methods that also find use in aligning sequences.
As used herein, “recombinant” includes reference to a cell or vector, that has been modified by the introduction of a heterologous nucleic acid sequence or that the cell is derived from a cell so modified. Thus, for example, recombinant cells express genes that are not found in identical form within the native (non-recombinant) form of the cell or express native genes that are otherwise abnormally expressed, under expressed or not expressed at all as a result of deliberate human intervention. “Recombination,” “recombining,” and generating a “recombined” nucleic acid are generally the assembly of two or more nucleic acid fragments wherein the assembly gives rise to a chimeric gene.
In a preferred embodiment, mutant DNA sequences are generated with site saturation mutagenesis in at least one codon. In another preferred embodiment, site saturation mutagenesis is performed for two or more codons. In a further embodiment, mutant DNA sequences have more than 50%, more than 55%, more than 60%, more than 65%, more than 70%, more than 75%, more than 80%, more than 85%, more than 90%, more than 95%, or more than 98% homology with the wild-type sequence. In alternative embodiments, mutant DNA is generated in vivo using any known mutagenic procedure such as, for example, radiation, nitrosoguanidine and the like. The desired DNA sequence is then isolated and used in the methods provided herein.
As used herein “amino acid” refers to peptide or protein sequences or portions thereof.
As used herein, “protein of interest” and “polypeptide of interest” refer to a protein/polypeptide that is desired and/or being assessed. In some embodiments, the protein of interest is expressed intracellularly, while in other embodiments, it is a secreted polypeptide. In particularly preferred embodiments, these enzyme include the serine proteases of the present invention. In some embodiments, the protein of interest is a secreted polypeptide which is fused to a signal peptide (i.e., an amino-terminal extension on a protein to be secreted). Nearly all secreted proteins use an amino-terminal protein extension which plays a crucial role in the targeting to and translocation of precursor proteins across the membrane. This extension is proteolytically removed by a signal peptidase during or immediately following membrane transfer.
As used herein, the term “heterologous protein” refers to a protein or polypeptide that does not naturally occur in the host cell. Examples of heterologous proteins include enzymes such as hydrolases including proteases. In some embodiments, the gene encoding the proteins are naturally occurring genes, while in other embodiments, mutated and/or synthetic genes are used.
As used herein, “homologous protein” refers to a protein or polypeptide native or naturally occurring in a cell. In preferred embodiments, the cell is a Gram-positive cell, while in particularly preferred embodiments, the cell is a Bacillus host cell. In alternative embodiments, the homologous protein is a native protein produced by other organisms, including but not limited to E. coli, Streptomyces, Trichoderma, and Aspergillus. The invention encompasses host cells producing the homologous protein via recombinant DNA technology.
The terms “protein” and “polypeptide” are used interchangeability herein. The 3-letter code for amino acids as defined in conformity with the IUPAC-IUB Joint Commission on Biochemical Nomenclature (JCBN) is used through out this disclosure. It is also understood that a polypeptide may be coded for by more than one nucleotide sequence due to the degeneracy of the genetic code.
“Naturally occurring enzyme” refers to an enzyme having the unmodified amino acid sequence identical to that found in nature. Naturally occurring enzymes include native enzymes, those enzymes naturally expressed or found in the particular microorganism.
The terms “derived from” and “obtained from” refer to not only a protease produced or producible by a strain of the organism in question, but also a protease encoded by a DNA sequence isolated from such strain and produced in a host organism containing such DNA sequence. Additionally, the term refers to a protease which is encoded by a DNA sequence of synthetic and/or cDNA origin and which has the identifying characteristics of the protease in question To exemplify, “proteases derived from Cellulomonas” refers to those enzymes having proteolytic activity which are naturally-produced by Cellulomonas, as well as to serine proteases like those produced by Cellulomonas sources but which through the use of genetic engineering techniques are produced by non-Cellulomonas organisms transformed with a nucleic acid encoding the serine proteases.
A “derivative” within the scope of this definition generally retains the characteristic proteolytic activity observed in the wild-type, native or parent form to the extent that the derivative is useful for similar purposes as the wild-type, native or parent form. Functional derivatives of serine protease encompass naturally occurring, synthetically or recombinantly produced peptides or peptide fragments which have the general characteristics of the serine protease of the present invention.
The term “functional derivative” refers to a derivative of a nucleic acid which has the functional characteristics of a nucleic acid which encodes serine protease. Functional derivatives of a nucleic acid which encode serine protease of the present invention encompass naturally occurring, synthetically or recombinantly produced nucleic acids or fragments and encode serine protease characteristic of the present invention. Wild type nucleic acid encoding serine proteases according to the invention include naturally occurring alleles and homologues based on the degeneracy of the genetic code known in the art.
The term “identical” in the context of two nucleic acids or polypeptide sequences refers to the residues in the two sequences that are the same when aligned for maximum correspondence, as measured using one of the following sequence comparison or analysis algorithms.
The term “optimal alignment” refers to the alignment giving the highest percent identity score.
“Percent sequence identity,” “percent amino acid sequence identity,” “percent gene sequence identity,” and/or “percent nucleic acid/polynucleotide sequence identity,” with respect to two amino acid, polynucleotide and/or gene sequences (as appropriate), refer to the percentage of residues that are identical in the two sequences when the sequences are optimally aligned. Thus, 80% amino acid sequence identity means that 80% of the amino acids in two optimally aligned polypeptide sequences are identical.
The phrase “substantially identical” in the context of two nucleic acids or polypeptides thus refers to a polynucleotide or polypeptide that comprising at least 70% sequence identity, preferably at least 75%, preferably at least 80%, preferably at least 85%, preferably at least 90%, preferably at least 95%, preferably at least 97%, preferably at least 98% and preferably at least 99% sequence identity as compared to a reference sequence using the programs or algorithms (e.g., BLAST, ALIGN, CLUSTAL) using standard parameters. One indication that two polypeptides are substantially identical is that the first polypeptide is immunologically cross-reactive with the second polypeptide. Typically, polypeptides that differ by conservative amino acid substitutions are immunologically cross-reactive. Thus, a polypeptide is substantially identical to a second polypeptide, for example, where the two peptides differ only by a conservative substitution. Another indication that two nucleic acid sequences are substantially identical is that the two molecules hybridize to each other under stringent conditions (e.g., within a range of medium to high stringency).
The phrase “equivalent,” in this context, refers to serine proteases enzymes that are encoded by a polynucleotide capable of hybridizing to the polynucleotide having the sequence as shown in SEQ ID NO:1, under conditions of medium to maximal stringency. For example, being equivalent means that an equivalent mature serine protease comprises at least 70%, at least 75%, at least 80%, at least 85%, at least 90%, at least 91%, at least 92%, at least 93%, at least 94%, at least 95%, at least 96%, at least 97%, at least 98% and/or at least 99% sequence identity to the mature Cellulomonas serine protease having the amino acid sequence of SEQ ID NO:8.
The term “isolated” or “purified” refers to a material that is removed from its original environment (e.g., the natural environment, if it is naturally occurring). For example, the material is said to be “purified” when it is present in a particular composition in a higher concentration than exists in a naturally occurring or wild type organism or in combination with components not normally present upon expression from a naturally occurring or wild type organism. 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 preferred embodiments, a nucleic acid or protein is said to be purified, for example, if it gives rise to essentially one band in an electrophoretic gel or blot.
The term “isolated,” when used in reference to a DNA sequence, refers to a DNA sequence that has been removed from its natural genetic milieu and is thus free of other extraneous or unwanted coding sequences, and is in a form suitable for use within genetically engineered protein production systems. Such isolated molecules are those that are separated from their natural environment and include cDNA and genomic clones. Isolated DNA molecules of the present invention are free of other genes with which they are ordinarily associated, but may include naturally occurring 5′ and 3′ untranslated regions such as promoters and terminators. The identification of associated regions will be evident to one of ordinary skill in the art (See e.g., Dynan and Tijan, Nature 316:774-78 [1985]). The term “an isolated DNA sequence” is alternatively referred to as “a cloned DNA sequence”.
The term “isolated,” when used in reference to a protein, refers to a protein that is found in a condition other than its native environment. In a preferred form, the isolated protein is substantially free of other proteins, particularly other homologous proteins. An isolated protein is more than 10% pure, preferably more than 20% pure, and even more preferably more than 30% pure, as determined by SDS-PAGE. Further aspects of the invention encompass the protein in a highly purified form (i.e., more than 40% pure, more than 60% pure, more than 80% pure, more than 90% pure, more than 95% pure, more than 97% pure, and even more than 99% pure), as determined by SDS-PAGE.
As used herein, the term “combinatorial mutagenesis” refers to methods in which libraries of variants of a starting sequence are generated. In these libraries, the variants contain one or several mutations (e.g., substitutions) chosen from a predefined set of mutations. In addition, the methods provide means to introduce random mutations which were not members of the predefined set of mutations (e.g., substitutions). In some embodiments, the methods include those set forth in U.S. patent application Ser. No. 09/699,250, filed Oct. 26, 2000, hereby incorporated by reference. In alternative embodiments, combinatorial mutagenesis methods encompass commercially available kits (e.g., QuikChange® Multisite, Stratagene, San Diego, Calif.).
As used herein, the term “library of mutants” refers to a population of cells which are identical in most of their genome but include different homologues of one or more genes. Such libraries can be used, for example, to identify genes or operons with improved traits.
As used herein, the term “starting gene” refers to a gene of interest that encodes a protein of interest that is to be improved and/or changed using the present invention.
As used herein, the term “multiple sequence alignment” (“MSA”) refers to the sequences of multiple homologs of a starting gene that are aligned using an algorithm (e.g., Clustal W).
As used herein, the terms “consensus sequence” and “canonical sequence” refer to an archetypical amino acid sequence against which all variants of a particular protein or sequence of interest are compared. The terms also refer to a sequence that sets forth the nucleotides that are most often present in a DNA sequence of interest. For each position of a gene, the consensus sequence gives the amino acid that is most abundant in that position in the MSA.
As used herein, the term “consensus mutation” refers to a difference in the sequence of a starting gene and a consensus sequence. Consensus mutations are identified by comparing the sequences of the starting gene and the consensus sequence resulting from an MSA. In some embodiments, consensus mutations are introduced into the starting gene such that it becomes more similar to the consensus sequence. Consensus mutations also include amino acid changes that change an amino acid in a starting gene to an amino-acid that is more frequently found in an MSA at that position relative to the frequency of that amino acid in the starting gene. Thus, the term consensus mutation comprises all single amino acid changes that replace an amino acid of the starting gene with an amino acid that is more abundant than the amino acid in the MSA.
As used herein, the term “initial hit” refers to a variant that was identified by screening a combinatorial consensus mutagenesis library. In preferred embodiments, initial hits have improved performance characteristics, as compared to the starting gene.
As used herein, the term “improved hit” refers to a variant that was identified by screening an enhanced combinatorial consensus mutagenesis library.
As used herein, the terms “improving mutation” and “performance-enhancing mutation” (“improving substitution” and “performance-enhancing substitution”) refer to a mutation (e.g., substitution) that leads to improved performance when it is introduced into the starting gene. In some preferred embodiments, these mutations (e.g., substitutions) are identified by sequencing hits that were identified during the screening step of the method. In most embodiments, mutations (e.g., substitutions) that are more frequently found in hits are likely to be improving mutations (e.g., substitutions) as compared to an unscreened combinatorial consensus mutagenesis library.
As used herein, the term “enhanced combinatorial consensus mutagenesis library” refers to a CCM library that is designed and constructed based on screening and/or sequencing results from an earlier round of CCM mutagenesis and screening. In some embodiments, the enhanced CCM library is based on the sequence of an initial hit resulting from an earlier round of CCM. In additional embodiments, the enhanced CCM is designed such that mutations that were frequently observed in initial hits from earlier rounds of mutagenesis and screening are favored. In some preferred embodiments, this is accomplished by omitting primers that encode performance-reducing mutations or by increasing the concentration of primers that encode performance-enhancing mutations relative to other primers that were used in earlier CCM libraries.
As used herein, the term “performance-reducing mutations” refer to mutations in the combinatorial consensus mutagenesis library that are less frequently found in hits resulting from screening as compared to an unscreened combinatorial consensus mutagenesis library. In preferred embodiments, the screening process removes and/or reduces the abundance of variants that contain “performance-reducing mutations.”
As used herein, the term “functional assay” refers to an assay that provides an indication of a protein's activity. In particularly preferred embodiments, the term refers to assay systems in which a protein is analyzed for its ability to function in its usual capacity. For example, in the case of enzymes, a functional assay involves determining the effectiveness of the enzyme in catalyzing a reaction.
As used herein, the term “target property” refers to the property of the starting gene that is to be altered. It is not intended that the present invention be limited to any particular target property. However, in some preferred embodiments, the target property is the stability of a gene product (e.g., resistance to denaturation, proteolysis or other degradative factors), while in other embodiments, the level of production in a production host is altered. Indeed, it is contemplated that any property of a starting gene will find use in the present invention.
The term “property” or grammatical equivalents thereof in the context of a nucleic acid, as used herein, refer to any characteristic or attribute of a nucleic acid that can be selected or detected. These properties include, but are not limited to, a property affecting binding to a polypeptide, a property conferred on a cell comprising a particular nucleic acid, a property affecting gene transcription (e.g., promoter strength, promoter recognition, promoter regulation, enhancer function), a property affecting RNA processing (e.g., RNA splicing, RNA stability, RNA conformation, and post-transcriptional modification), a property affecting translation (e.g., level, regulation, binding of mRNA to ribosomal proteins, post-translational modification). For example, a binding site for a transcription factor, polymerase, regulatory factor, etc., of a nucleic acid may be altered to produce desired characteristics or to identify undesirable characteristics.
The term “property” or grammatical equivalents thereof in the context of a polypeptide, as used herein, refer to any characteristic or attribute of a polypeptide that can be selected or detected. These properties include, but are not limited to oxidative stability, substrate specificity, catalytic activity, thermal stability, alkaline stability, pH activity profile, resistance to proteolytic degradation, KM, kcat, kcat/kM ratio, protein folding, inducing an immune response, ability to bind to a ligand; ability to bind to a receptor, ability to be secreted, ability to be displayed on the surface of a cell, ability to oligomerize, ability to signal, ability to stimulate cell proliferation, ability to inhibit cell proliferation, ability to induce apoptosis, ability to be modified by phosphorylation or glycosylation, ability to treat disease.
As used herein, the term “screening” has its usual meaning in the art and is, in general a multi-step process. In the first step, a mutant nucleic acid or variant polypeptide therefrom is provided. In the second step, a property of the mutant nucleic acid or variant polypeptide is determined. In the third step, the determined property is compared to a property of the corresponding precursor nucleic acid, to the property of the corresponding naturally occurring polypeptide or to the property of the starting material (e.g., the initial sequence) for the generation of the mutant nucleic acid.
It will be apparent to the skilled artisan that the screening procedure for obtaining a nucleic acid or protein with an altered property depends upon the property of the starting material the modification of which the generation of the mutant nucleic acid is intended to facilitate. The skilled artisan will therefore appreciate that the invention is not limited to any specific property to be screened for and that the following description of properties lists illustrative examples only. Methods for screening for any particular property are generally described in the art. For example, one can measure binding, pH, specificity, etc., before and after mutation, wherein a change indicates an alteration. Preferably, the screens are performed in a high-throughput manner, including multiple samples being screened simultaneously, including, but not limited to assays utilizing chips, phage display, and multiple substrates and/or indicators.
As used herein, in some embodiments, screens encompass selection steps in which variants of interest are enriched from a population of variants. Examples of these embodiments include the selection of variants that confer a growth advantage to the host organism, as well as phage display or any other method of display, where variants can be captured from a population of variants based on their binding or catalytic properties. In a preferred embodiment, a library of variants is exposed to stress (e.g., heat, protease, denaturation, etc.) and subsequently variants that are still intact are identified in a screen or enriched by selection. It is intended that the term encompass any suitable means for selection. Indeed, it is not intended that the present invention be limited to any particular method of screening.
As used herein, the term “targeted randomization” refers to a process that produces a plurality of sequences where one or several positions have been randomized. In some embodiments, randomization is complete (i.e., all four nucleotides, A, T, G, and C can occur at a randomized position). In alternative embodiments, randomization of a nucleotide is limited to a subset of the four nucleotides. Targeted randomization can be applied to one or several codons of a sequence, coding for one or several proteins of interest. When expressed, the resulting libraries produce protein populations in which one or more amino acid positions can contain a mixture of all 20 amino acids or a subset of amino acids, as determined by the randomization scheme of the randomized codon. In some embodiments, the individual members of a population resulting from targeted randomization differ in the number of amino acids, due to targeted or random insertion or deletion of codons. In further embodiments, synthetic amino acids are included in the protein populations produced. In some preferred embodiments, the majority of members of a population resulting from targeted randomization show greater sequence homology to the consensus sequence than the starting gene. In some embodiments, the sequence encodes one or more proteins of interest. In alternative embodiments, the proteins have differing biological functions. In some preferred embodiments, the incoming sequence comprises at least one selectable marker.
The terms “modified sequence” and “modified genes” are used interchangeably herein to refer to a sequence that includes a deletion, insertion or interruption of naturally occurring nucleic acid sequence. In some preferred embodiments, the expression product of the modified sequence is a truncated protein (e.g., if the modification is a deletion or interruption of the sequence). In some particularly preferred embodiments, the truncated protein retains biological activity. In alternative embodiments, the expression product of the modified sequence is an elongated protein (e.g., modifications comprising an insertion into the nucleic acid sequence). In some embodiments, an insertion leads to a truncated protein (e.g., when the insertion results in the formation of a stop codon). Thus, an insertion may result in either a truncated protein or an elongated protein as an expression product.
As used herein, the term “substutition” encompasses the replacement of one amino acid in an amino acid sequence with another amino acid at that position in the amino acid sequence. Thus, the term encompasses situations in which insertion and/or deletion of another amino acid in an amino acid sequence changes the relative positions of the amino acids in the sequence. Thus, while an amino acid may not be specifically targeted for substitution (e.g., using the methods described herein), that amino acid may be “substituted” by another amino acid in the sequence due to a change in its relative position in the sequence. For example, by inserting an amino acid between the amino acids at positions 1 and 2 of SEQ ID NO:8, the resulting sequence will be shifted by one amino acid (i.e., the amino acid originally in position 2 is now in position 3, etc.). It is intended that the term encompass multiple, as well as single changes in the amino acid sequence (i.e., single or multiple substitutions). It is also noted that as used herein, amino acid substitutions are indicated by the naturally occurring amino acid, followed by the position, followed by the substituted amino acid. Thus, N024E (also indicated as N24E) indicates that the asparagine at position 24 of SEQ ID NO:8 has been substituted with glutamic acid. As indicated herein, multiple substitutions are indicated by either “/” or “-”. Thus, “R127A-G65Q” and “R127A/G65Q” both indicate that the amino acids at positions 127 and 65 have been substituted (i.e., the arginine at position 127 has been substituted with an alanine and the glycine at position 65 has been substituted with a glutamine).
As used herein, the terms “mutant sequence” and “mutant gene” are used interchangeably and refer to a sequence that has an alteration in at least one codon occurring in a host cell's wild-type sequence. The expression product of the mutant sequence is a protein with an altered amino acid sequence relative to the wild-type. The expression product may have an altered functional capacity (e.g., enhanced enzymatic activity).
As used herein, the term “up mutation” refers to mutations for which ΔΔ G values for a property are better than the parent protein (ΔΔ G values, <0).
As used herein, the term “down mutation” refers to mutations for which ΔΔ G values for a property are worse than the parent protein (ΔΔ G values, >0).
As used herein, the term “productive site” refers to positions which have at least one up mutation for a given property.
As used herein, the term “unproductive site” refers to positions which have no up mutations for a given property.
The terms “mutagenic primer” or “mutagenic oligonucleotide” (used interchangeably herein) are intended to refer to oligonucleotide compositions which correspond to a portion of the template sequence and which are capable of hybridizing thereto. With respect to mutagenic primers, the primer will not precisely match the template nucleic acid, the mismatch or mismatches in the primer being used to introduce the desired mutation into the nucleic acid library. As used herein, “non-mutagenic primer” or “non-mutagenic oligonucleotide” refers to oligonucleotide compositions which will match precisely to the template nucleic acid. In one embodiment of the invention, only mutagenic primers are used. In another preferred embodiment of the invention, the primers are designed so that for at least one region at which a mutagenic primer has been included, there is also non-mutagenic primer included in the oligonucleotide mixture. By adding a mixture of mutagenic primers and non-mutagenic primers corresponding to at least one of the mutagenic primers, it is possible to produce a resulting nucleic acid library in which a variety of combinatorial mutational patterns are presented. For example, if it is desired that some of the members of the mutant nucleic acid library retain their precursor sequence at certain positions while other members are mutant at such sites, the non-mutagenic primers provide the ability to obtain a specific level of non-mutant members within the nucleic acid library for a given residue. The methods of the invention employ mutagenic and non-mutagenic oligonucleotides which are generally between 10-50 bases in length, more preferably about 1545 bases in length. However, it may be necessary to use primers that are either shorter than 10 bases or longer than 50 bases to obtain the mutagenesis result desired. With respect to corresponding mutagenic and non-mutagenic primers, it is not necessary that the corresponding oligonucleotides be of identical length, but only that there is overlap in the region corresponding to the mutation to be added.
Primers may be added in a pre-defined ratio according to the present invention. For example, if it is desired that the resulting library have a significant level of a certain specific mutation and a lesser amount of a different mutation at the same or different site, by adjusting the amount of primer added, it is possible to produce the desired biased library. Alternatively, by adding lesser or greater amounts of non-mutagenic primers, it is possible to adjust the frequency with which the corresponding mutation(s) are produced in the mutant nucleic acid library.
As used herein, the phrase “contiguous mutations” refers to mutations which are presented within the same oligonucleotide primer. For example, contiguous mutations may be adjacent or nearby each other, however, they will be introduced into the resulting mutant template nucleic acids by the same primer.
As used herein, the phrase “discontiguous mutations” refers to mutations which are presented in separate oligonucleotide primers. For example, discontiguous mutations will be introduced into the resulting mutant template nucleic acids by separately prepared oligonucleotide primers.
The terms “wild-type sequence,” or “wild-type gene” are used interchangeably herein, to refer to a sequence that is native or naturally occurring in a host cell. In some embodiments, the wild-type sequence refers to a sequence of interest that is the starting point of a protein engineering project. The wild-type sequence may encode either a homologous or heterologous protein. A homologous protein is one the host cell would produce without intervention. A heterologous protein is one that the host cell would not produce but for the intervention.
As used herein, the term “antibodies” refers to immunoglobulins. Antibodies include but are not limited to immunoglobulins obtained directly from any species from which it is desirable to produce antibodies. In addition, the present invention encompasses modified antibodies. The term also refers to antibody fragments that retain the ability to bind to the epitope that the intact antibody binds and include polyclonal antibodies, monoclonal antibodies, chimeric antibodies, anti-idiotype (anti-ID) antibodies. Antibody fragments include, but are not limited to the complementarity-determining regions (CDRs), single-chain fragment variable regions (scFv), heavy chain variable region (VH), light chain variable region (VL). Polyclonal and monoclonal antibodies are also encompassed by the present invention. Preferably, the antibodies are monoclonal antibodies.
The term “oxidation stable” refers to proteases of the present invention that retain a specified amount of enzymatic activity over a given period of time under conditions prevailing during the proteolytic, hydrolyzing, cleaning or other process of the invention, for example while exposed to or contacted with bleaching agents or oxidizing agents. In some embodiments, the proteases retain at least 50%, 60%, 70%, 75%, 80%, 85%, 90%, 92%, 95%, 96%, 97%, 98% or 99% proteolytic activity after contact with a bleaching or oxidizing agent over a given time period, for example, at least 1 minute, 3 minutes, 5 minutes, 8 minutes, 12 minutes, 16 minutes, 20 minutes, etc. In some embodiments, the stability is measured as described in the Examples.
The term “chelator stable” refers to proteases of the present invention that retain a specified amount of enzymatic activity over a given period of time under conditions prevailing during the proteolytic, hydrolyzing, cleaning or other process of the invention, for example while exposed to or contacted with chelating agents. In some embodiments, the proteases retain at least 50%, 60%, 70%, 75%, 80%, 85%, 90%, 92%, 95%, 96%, 97%, 98% or 99% proteolytic activity after contact with a chelating agent over a given time period, for example, at least 10 minutes, 20 minutes, 40 minutes, 60 minutes, 100 minutes, etc. In some embodiments, the chelator stability is measured as described in the Examples.
The terms “thermally stable” and “thermostable” refer to proteases of the present invention that retain a specified amount of enzymatic activity after exposure to identified temperatures over a given period of time under conditions prevailing during the proteolytic, hydrolyzing, cleaning or other process of the invention, for example while exposed altered temperatures. Altered temperatures includes increased or decreased temperatures. In some embodiments, the proteases retain at least 50%, 60%, 70%, 75%, 80%, 85%, 90%, 92%, 95%, 96%, 97%, 98% or 99% proteolytic activity after exposure to altered temperatures over a given time period, for example, at least 60 minutes, 120 minutes, 180 minutes, 240 minutes, 300 minutes, etc. In some embodiments, the thermostability is determined as described in the Examples.
The term “enhanced stability” in the context of an oxidation, chelator, thermal and/or pH stable protease refers to a higher retained proteolytic activity over time as compared to other serine proteases (e.g., subtilisin proteases) and/or wild-type enzymes.
The term “diminished stability” in the context of an oxidation, chelator, thermal and/or pH stable protease refers to a lower retained proteolytic activity over time as compared to other serine proteases (e.g., subtilisin proteases) and/or wild-type enzymes.
The term “cleaning activity” refers to the cleaning performance achieved by the protease under conditions prevailing during the proteolytic, hydrolyzing, cleaning or other process of the invention. In some embodiments, cleaning performance is determined by the application of various cleaning assays concerning enzyme sensitive stains, for example grass, blood, milk, or egg protein as determined by various chromatographic, spectrophotometric or other quantitative methodologies after subjection of the stains to standard wash conditions. Exemplary assays include, but are not limited to those described in WO 99/34011, and U.S. Pat. No. 6,605,458 (both of which are herein incorporated by reference), as well as those methods included in the Examples.
The term “cleaning effective amount” of a protease refers to the quantity of protease described hereinbefore that achieves a desired level of enzymatic activity in a specific cleaning composition. Such effective amounts are readily ascertained by one of ordinary skill in the art and are based on many factors, such as the particular protease used, the cleaning application, the specific composition of the cleaning composition, and whether a liquid or dry (e.g., granular, bar) composition is required, etc.
The term “cleaning adjunct materials,” as used herein, means any liquid, solid or gaseous material selected for the particular type of cleaning composition desired and the form of the product (e.g., liquid, granule, powder, bar, paste, spray, tablet, gel; or foam composition), which materials are also preferably compatible with the protease enzyme used in the composition. In some embodiments, granular compositions are in “compact” form, while in other embodiments, the liquid compositions are in a “concentrated” form.
The term “enhanced performance” in the context of cleaning activity refers to an increased or greater cleaning activity of certain enzyme sensitive stains such as egg, milk, grass or blood, as determined by usual evaluation after a standard wash cycle and/or multiple wash cycles.
The term “diminished performance” in the context of cleaning activity refers to an decreased or lesser cleaning activity of certain enzyme sensitive stains such as egg, milk, grass or blood, as determined by usual evaluation after a standard wash cycle.
The term “comparative performance” in the context of cleaning activity refers to at least 60%, at least 70%, at least 80% at least 90% at least 95% of the cleaning activity of a comparative subtilisin protease (e.g., commercially available proteases), including but not limited to OPTIMASETM protease (Genencor), PURAFECTTM protease products (Genencor), SAVINASETM protease (Novozymes), BPN′-variants (See e.g., U.S. Pat. No. Re 34, 606), RELASETM, DURAZYMETM, EVERLASETM, KANNASETM protease (Novozymes), MAXACALTM, MAXAPEMTM, PROPERASETM proteases (Genencor; See also, U.S. Pat. No. Re 34, 606, and U.S. Pat. Nos. 5,700,676; 5,955,340; 6,312,936; and 6,482,628), and B. lentus variant protease products (e.g., those described in WO 92/21760, WO 95/23221 and/or WO 97/07770). Exemplary subtilisin protease variants include, but are not limited to those having substitutions or deletions at residue positions equivalent to positions 76, 101, 103, 104, 120, 159, 167, 170, 194, 195, 217, 232, 235, 236, 245, 248, and/or 252 of BPN′. Cleaning performance can be determined by comparing the proteases of the present invention with those subtilisin proteases in various cleaning assays concerning enzyme sensitive stains such as grass, blood or milk as determined by usual spectrophotometric or analytical methodologies after standard wash cycle conditions.
As used herein, a “low detergent concentration” system includes detergents where less than about 800 ppm of detergent components are present in the wash water. Japanese detergents are typically considered low detergent concentration systems, as they have usually have approximately 667 ppm of detergent components present in the wash water.
As used herein, a “medium detergent concentration” systems includes detergents wherein between about 800 ppm and about 2000 ppm of detergent components are present in the wash water. North American detergents are generally considered to be medium detergent concentration systems as they have usually approximately 975 ppm of detergent components present in the wash water. Brazilian detergents typically have approximately 1500 ppm of detergent components present in the wash water.
As used herein, “high detergent concentration” systems includes detergents wherein greater than about 2000 ppm of detergent components are present in the wash water. European detergents are generally considered to be high detergent concentration systems as they have approximately 3000-8000 ppm of detergent components in the wash water.
As used herein, “fabric cleaning compositions” include hand and machine laundry detergent compositions including laundry additive compositions and compositions suitable for use in the soaking and/or pretreatment of stained fabrics (e.g., clothes, linens, and other textile materials).
As used herein, “non-fabric cleaning compositions” include non-textile (i.e., fabric) surface cleaning compositions, including but not limited to dishwashing detergent compositions, oral cleaning compositions, denture cleaning compositions, and personal cleansing compositions.
The “compact” form of the cleaning compositions herein is best reflected by density and, in terms of composition, by the amount of inorganic filler salt. Inorganic filler salts are conventional ingredients of detergent compositions in powder form. In conventional detergent compositions, the filler salts are present in substantial amounts, typically 17-35% by weight of the total composition. In contrast, in compact compositions, the filler salt is present in amounts not exceeding 15% of the total composition. In some embodiments, the filler salt is present in amounts that do not exceed 10%, or more preferably, 5%, by weight of the composition. In some embodiments, the inorganic filler salts are selected from the alkali and alkaline-earth-metal salts of sulfates and chlorides. A preferred filler salt is sodium sulfate.
II. Serine Protease Enzymes of the Present Invention and Sequences Therefor
The present invention provides isolated polynucleotides encoding amino acid sequences which encode variant proteases. U.S. patent application Ser. No. 10/576,331, incorporated by reference in its entirety provides various proteases, including the wild-type Cellulomonas serine protease, as well as numerous variant proteases, signal peptide coding sequences, and amino acid sequences. In some preferred embodiments of the present invention, the Cellulomonas spp. is Cellulomonas strain 69B4 (DSM16035), as described in U.S. patent application Ser. No. 10/576,331.
A. Serine Proteases
Although there may be variations in the sequence of a naturally occurring enzyme within a given species of organism, enzymes of a specific type produced by organisms of the same species generally are substantially identical with respect to substrate specificity and/or proteolytic activity levels under given conditions (e.g., temperature, pH, water hardness, oxidative conditions, chelating conditions, and concentration), etc. Thus, for the purposes of the present invention, it is contemplated that other strains and species of Cellulomonas also produce the Cellulomonas protease of the present invention and thus provide useful sources for the proteases of the present invention. Indeed, as presented herein, it is contemplated that other members of the Micrococcineae will find use in the present invention.
In some embodiments, the proteolytic polypeptides of this invention are characterized physicochemically, while in other embodiments, they are characterized based on their functionally, while in further embodiments, they are characterized using both sets of properties. Physicochemical characterization takes advantages of well-known techniques such as SDS-electrophoresis, gel filtration, amino acid composition, mass spectrometry (e.g., MALDI-TOF-MS, LC-ES-MS/MS, etc.), and sedimentation to determine the molecular weight of proteins, isoelectric focusing to determine the pI of proteins, amino acid sequencing to determine the amino acid sequences of protein, crystallography studies to determine the tertiary structures of proteins, and antibody binding to determine antigenic epitopes present in proteins.
In some embodiments, functional characteristics are determined by techniques well known to the practitioner in the protease field and include, but are not limited to, hydrolysis of various commercial substrates, such as di-methyl casein (“DMC”) and/or AAPF-pNA. This preferred technique for functional characterization is described in greater detail in the Examples provided herein.
The mature protease also displays proteolytic activity (e.g., hydrolytic activity on a substrate having peptide linkages) such as DMC. In further embodiments, proteases of the present invention provide enhanced wash performance under identified conditions. Although the present invention encompasses the protease 69B as described herein, in some embodiments, the proteases of the present invention exhibit at least 50%, 60%, 70%, 75%, 80%, 85%, 90%, 92%, 95%, 96%, 97%, 98% or 99% proteolytic activity as compared to the proteolytic activity of 69B4. In some embodiments, the proteases display at least 50%, 60%, 70%, 75%, 80%, 85%, 90%, 92%, 95%, 96%, 97%, 98% or 99% proteolytic activity as compared to the proteolytic activity of proteases sold under the tradenames SAVINASE® (Novzymes) or PURAFECT® (Genencor) under the same conditions. In some embodiments, the proteases of the present invention display comparative or enhanced wash performance under identified conditions as compared to 69B4 under the same conditions. In some preferred embodiments, the proteases of the present invention display comparative or enhanced wash performance under identified conditions, as compared to proteases sold under the tradenames SAVINASE® (Novozymes) or PURAFECT® (Genencor) under the same conditions.
In yet further embodiments, the proteases and/or polynucleotides encoding the proteases of the present invention are provided in purified form (i.e., present in a particular composition in a higher or lower concentration than exists in a naturally occurring or wild type organism), or in combination with components not normally present upon expression from a naturally occurring or wild-type organism. However, it is not intended that the present invention be limited to proteases of any specific purity level, as ranges of protease purity find use in various applications in which the proteases of the present invention are suitable.
B. Nucleic and Amino Acid Sequences of Serine Proteases
The DNA sequence of the asp gene (SEQ ID NO: 1) derived from Cellulomonas strain 69B4 (DSM 16035) is provided below. The initiating polynucleotide encoding the signal peptide of the Cellulomonas strain 69B4 protease is in bold (ATG). This sequence also includes the signal peptide and precursor serine protease.
The following DNA sequence (SEQ ID NO:2) encodes the signal peptide (SEQ ID NO:9) that is operatively linked to the precursor protease (SEQ ID NO:7) derived from Cellulomonas strain 69B4 (DSM 16035). The initiating polynucleotide encoding the signal peptide of the Cellulomonas strain 69B4 protease is in bold (ATG). The termination codon (TGA) begins with residue 1486. Residues 85, 595, and 1162, relate to the initial residues of the N terminal prosequence, mature sequence and Carboxyl terminal prosequence, respectively, are bolded and underlined.








(SEQ ID NO: 2)










ATGACACCAC GCACAGTCAC GCGGGCCCTG GCCGTGGCCA CCGCAGCCGC CACACTCCTG
60



 


GCAGGCGGCA TGGCCGCCCA GGCCAACGAG CCCGCACCAC CCGGGAGCGC GAGCGCACCG
120


 


CCACGCCTGG CCGAGAAGCT CGACCCCGAC CTCCTCGAGG CCATGGAGCG CGACCTGGGC
180


 


CTCGACGCGG AGGAAGCCGC CGCCACCCTG GCGTTCCAGC ACGACGCAGC CGAGACCGGC
240


 


GAGGCCCTCG CCGAAGAGCT CGACGAGGAC TTCGCCGGCA CCTGGGTCGA GGACGACGTC
300


 


CTGTACGTCG CCACCACCGA CGAGGACGCC GTCGAGGAGG TCGAGGGCGA AGGCGCCACG
360


 


GCCGTCACCG TCGAGCACTC CCTGGCCGAC CTCGAGGCCT GGAAGACCGT CCTCGACGCC
420


 


GCCCTCGAGG GCCACGACGA CGTGCCCACC TGGTACGTCG ACGTCCCGAC CAACAGCGTC
480


 


GTCGTCGCCG TCAAGGCCGG AGCCCAGGAC GTCGCCGCCG GCCTCGTCGA AGGTGCCGAC
540


 


GTCCCGTCCG ACGCCGTGAC CTTCGTCGAG ACCGACGAGA CCCCGCGGAC CATGTTCGAC
600


 


GTGATCGGCG GCAACGCCTA CACCATCGGG GGGCGCAGCC GCTGCTCGAT CGGGTTCGCG
660


 


GTCAACGGCG GGTTCATCAC CGCCGGCCAC TGCGGCCGCA CCGGCGCCAC CACCGCCAAC
720


 


CCCACCGGGA CCTTCGCCGG GTCCAGCTTC CCGGGCAACG ACTACGCGTT CGTCCGTACC
780


 


GGGGCCGGCG TGAACCTGCT GGCCCAGGTC AACAACTACT CCGGTGGCCG CGTCCAGGTC
840


 


GCCGGGCACA CCGCGGCCCC CGTCGGCTCG GCCGTGTGCC GGTCCGGGTC GACCACCGGG
900


 


TGGCACTGCG GCACCATCAC TGCGCTCAAC TCCTCGGTCA CCTACCCCGA GGGCACCGTC
960


 


CGCGGCCTGA TCCGCACCAC CGTCTGCGCC GAGCCCGGCG ACTCCGGTGG CTCGCTGCTC 
1020


 


GCCGGCAACC AGGCCCAGGG CGTCACGTCC GGCGGCTCCG GCAACTGCCG CACCGGTGGC
1080


 


ACCACGTTCT TCCAGCCGGT CAACCCCATC CTCCAGGCGT ACGGCCTGAG GATGATCACC
1140


 


ACGGACTCGG GCAGCAGCCC GGCCCCTGCA CCGACCTCCT GCACCGGCTA CGCCCGCACC
1200


 


TTCACCGGGA CCCTCGCGGC CGGCCGGGCC GCCGCCCAGC CCAACGGGTC CTACGTGCAG
1260


 


GTCAACCGGT CCGGGACCCA CAGCGTGTGC CTCAACGGGC CCTCCGGTGC GGACTTCGAC
1320


 


CTCTACGTGC AGCGCTGGAA CGGCAGCTCC TGGGTGACCG TCGCCCAGAG CACCTCCCCC
1380


 


GGCTCCAACG AGACCATCAC CTACCGCGGC AACGCCGGCT ACTACCGCTA CGTGGTCAAC
1440


 


GCCGCGTCCG GCTCCGGTGC CTACACCATG GGGCTCACCC TCCCCTGA
1488






The following DNA sequence (SEQ ID NO:3) encodes the precursor protease derived from Cellulomonas strain 69B4 (DSM 16035).








(SEQ ID NO: 3)










1
AACGAGCCCG CACCACCCGG GAGCGCGAGC GCACCGCCAC GCCTGGCCGA GAAGCTCGAC




TTGCTCGGGC GTGGTGGGCC CTCGCGCTCG CGTGGCGGTG CGGACCGGCT CTTCGAGCTG


 


61
CCCGACCTCC TCGAGGCCAT GGAGCGCGAC CTGGGCCTCG ACGCGGAGGA AGCCGCCGCC



GGGCTGGAGG AGCTCCGGTA CCTCGCGCTG GACCCGGAGC TGCGCCTCCT TCGGCGGCGG


 


121
ACCCTGGCGT TCCAGCACGA CGCAGCCGAG ACCGGCGAGG CCCTCGCCGA AGAGCTCGAC



TGGGACCGCA AGGTCGTGCT GCGTCGGCTC TGGCCGCTCC GGGAGCGGCT TCTCGAGCTG


181
GAGGACTTCG CCGGCACCTG GGTCGAGGAC GACGTCCTGT ACGTCGCCAC CACCGACGAG 



CTCCTGAAGC GGCCGTGGAC CCAGCTCCTG CTGCAGGACA TGCAGCGGTG GTGGCTGCTC


 


241
GACGCCGTCG AGGAGGTCGA GGGCGAAGGC GCCACGGCCG TCACCGTCGA GCACTCCCTG



CTGCGGCAGC TCCTCCAGCT CCCGCTTCCG CGGTGCCGGC AGTGGCAGCT CGTGAGGGAC


 


301
GCCGACCTCG AGGCCTGGAA GACCGTCCTC GACGCCGCCC TCGAGGGCCA CGACGACGTG



CGGCTGGAGC TCCGGACCTT CTGGCAGGAG CTGCGGCGGG AGCTCCCGGT GCTGCTGCAC


 


361
CCCACCTGGT ACGTCGACGT CCCGACCAAC AGCGTCGTCG TCGCCGTCAA GGCCGGAGCC



GGGTGGACCA TGCAGCTGCA GGGCTGGTTG TCGCAGCAGC AGCGGCAGTT CCGGCCTCGG


 


421
CAGGACGTCG CCGCCGGCCT CGTCGAAGGT GCCGACGTCC CGTCCGACGC CGTGACCTTC



GTCCTGCAGC GCCGGCCGGA GCAGCTTCCA CGGCTGCAGG GCAGGCTGCG GCACTGGAAG


 


481
GTCGAGACCG ACGAGACCCC GCGGACCATG TTCGACGTGA TCGGCGGCAA CGCCTACACC 



CAGCTCTGGC TGCTCTGGGG CGCCTGGTAC AAGCTGCACT AGCCGCCGTT GCGGATGTGG


 


541
ATCGGGGGGC GCAGCCGCTG CTCGATCGGG TTCGCGGTCA ACGGCGGGTT CATCACCGCC



TAGCCCCCCG CGTCGGCGAC GAGCTAGCCC AAGCGCCAGT TGCCGCCCAA GTAGTGGCGG


 


601
GGCCACTGCG GCCGCACCGG CGCCACCACC GCCAACCCCA CCGGGACCTT CGCCGGGTCC



CCGGTGACGC CGGCGTGGCC GCGGTGGTGG CGGTTGGGGT GGCCCTGGAA GCGGCCCAGG


 


661
AGCTTCCCGG GCAACGACTA CGCGTTCGTC CGTACCGGGG CCGGCGTGAA CCTGCTGGCC



TCGAAGGGCC CGTTGCTGAT GCGCAAGCAG GCATGGCCCC GGCCGCACTT GGACGACCGG


 


721
CAGGTCAACA ACTACTCCGG TGGCCGCGTC CAGGTCGCCG GGCACACCGC GGCCCCCGTC



GTCCAGTTGT TGATGAGGCC ACCGGCGCAG GTCCAGCGGC CCGTGTGGCG CCGGGGGCAG


 


781
GGCTCGGCCG TGTGCCGGTC CGGGTCGACC ACCGGGTGGC ACTGCGGCAC CATCACTGCG



CCGAGCCGGC ACACGGCCAG GCCCAGCTGG TGGCCCACCG TGACGCCGTG GTAGTGACGC


 


841
CTCAACTCCT CGGTCACCTA CCCCGAGGGC ACCGTCCGCG GCCTGATCCG CACCACCGTC



GAGTTGAGGA GCCAGTGGAT GGGGCTCCCG TGGCAGGCGC CGGACTAGGC GTGGTGGCAG


 


901
TGCGCCGAGC CCGGCGACTC CGGTGGCTCG CTGCTCGCCG GCAACCAGGC CCAGGGCGTC



ACGCGGCTCG GGCCGCTGAG GCCACCGAGC GACGAGCGGC CGTTGGTCCG GGTCCCGCAG


 


961
ACGTCCGGCG GCTCCGGCAA CTGCCGCACC GGTGGCACCA CGTTCTTCCA GCCGGTCAAC



TGCAGGCCGC CGAGGCCGTT GACGGCGTGG CCACCGTGGT GCAAGAAGGT CGGCCAGTTG


 


1021
CCCATCCTCC AGGCGTACGG CCTGAGGATG ATCACCACGG ACTCGGGCAG CAGCCCGGCC



GGGTAGGAGG TCCGCATGCC GGACTCCTAC TAGTGGTGCC TGAGCCCGTC GTCGGGCCGG


 


1081
CCTGCACCGA CCTCCTGCAC CGGCTACGCC CGCACCTTCA CCGGGACCCT CGCGGCCGGC



GGACGTGGCT GGAGGACGTG GCCGATGCGG GCGTGGAAGT GGCCCTGGGA GCGCCGGCCG


 


1141
CGGGCCGCCG CCCAGCCCAA CGGGTCCTAC GTGCAGGTCA ACCGGTCCGG GACCCACAGC



GCCCGGCGGC GGGTCGGGTT GCCCAGGATG CACGTCCAGT TGGCCAGGCC CTGGGTGTCG


 


1201
GTGTGCCTCA ACGGGCCCTC CGGTGCGGAC TTCGACCTCT ACGTGCAGCG CTGGAACGGC



CACACGGAGT TGCCCGGGAG GCCACGCCTG AAGCTGGAGA TGCACGTCGC GACCTTGCCG


 


1261
AGCTCCTGGG TGACCGTCGC CCAGAGCACC TCCCCCGGCT CCAACGAGAC CATCACCTAC



TCGAGGACCC ACTGGCAGCG GGTCTCGTGG AGGGGGCCGA GGTTGCTCTG GTAGTGGATG


 


1321
CGCGGCAACG CCGGCTACTA CCGCTACGTG GTCAACGCCG CGTCCGGCTC CGGTGCCTAC



GCGCCGTTGC GGCCGATGAT GGCGATGCAC CAGTTGCGGC GCAGGCCGAG GCCACGGATG


 


1381
ACCATGGGGC TCACCCTCCC CTGA 



TGGTACCCCG AGTGGGAGGG GACT






The following DNA sequence (SEQ ID NO:4) encodes the mature protease derived from Cellulomonas strain 69B4 (DSM 16035).








(SEQ ID NO: 4)










1
TTCGACGTGA TCGGCGGCAA CGCCTACACC ATCGGGGGGC GCAGCCGCTG CTCGATCGGG




AAGCTGCACT AGCCGCCGTT GCGGATGTGG TAGCCCCCCG CGTCGGCGAC GAGCTAGCCC


 


61
TTCGCGGTCA ACGGCGGGTT CATCACCGCC GGCCACTGCG GCCGCACCGG CGCCACCACC



AAGCGCCAGT TGCCGCCCAA GTAGTGGCGG CCGGTGACGC CGGCGTGGCC GCGGTGGTGG


 


121
GCCAACCCCA CCGGGACCTT CGCCGGGTCC AGCTTCCCGG GCAACGACTA CGCGTTCGTC



CGGTTGGGGT GGCCCTGGAA GCGGCCCAGG TCGAAGGGCC CGTTGCTGAT GCGCAAGCAG


181
CGTACCGGGG CCGGCGTGAA CCTGCTGGCC CAGGTCAACA ACTACTCCGG TGGCCGCGTC



GCATGGCCCC GGCCGCACTT GGACGACCGG GTCCAGTTGT TGATGAGGCC ACCGGCGCAG


 


241
CAGGTCGCCG GGCACACCGC GGCCCCCGTC GGCTCGGCCG TGTGCCGGTC CGGGTCGACC



GTCCAGCGGC CCGTGTGGCG CCGGGGGCAG CCGAGCCGGC ACACGGCCAG GCCCAGCTGG


 


301
ACCGGGTGGC ACTGCGGCAC CATCACTGCG CTCAACTCCT CGGTCACCTA CCCCGAGGGC



TGGCCCACCG TGACGCCGTG GTAGTGACGC GAGTTGAGGA GCCAGTGGAT GGGGCTCCCG


 


361
ACCGTCCGCG GCCTGATCCG CACCACCGTC TGCGCCGAGC CCGGCGACTC CGGTGGCTCG



TGGCAGGCGC CGGACTAGGC GTGGTGGCAG ACGCGGCTCG GGCCGCTGAG GCCACCGAGC


 


421
CTGCTCGCCG GCAACCAGGC CCAGGGCGTC ACGTCCGGCG GCTCCGGCAA CTGCCGCACC



GACGAGCGGC CGTTGGTCCG GGTCCCGCAG TGCAGGCCGC CGAGGCCGTT GACGGCGTGG


 


481
GGTGGCACCA CGTTCTTCCA GCCGGTCAAC CCCATCCTCC AGGCGTACGG CCTGAGGATG



CCACCGTGGT GCAAGAAGGT CGGCCAGTTG GGGTAGGAGG TCCGCATGCC GGACTCCTAC


 


561
ATCACCACGG ACTCGGGCAG CAGCCCG 



TAGTGGTGCC TGAGCCCGTC GTCGGGC






The following DNA sequence (SEQ ID NO:5) encodes the signal peptide derived from Cellulomonas strain 69B4 (DSM 16035).








(SEQ ID NO: 5)










1
ATGACACCAC CACAGTCAC GCGGGCCCTG GCCGTGGCCA CCGCAGCCGC CACACTCCTG




TACTGTGGTG CGTGTCAGTG CGCCCGGGAC CGGCACCGGT GGCGTCGGCG GTGTGAGGAC


 









61
GCAGGCGGCA TGGCCGCCCA GGCC 




CGTCCGCCGT ACCGGCGGGT CCGG






The following sequence is the amino acid sequence (SEQ ID NO:6) of the signal sequence and precursor protease derived from Cellulomonas strain 69B4 (DSM 16035), including the signal sequence [segments 1a-c] (residues 1-28 [−198 to −171]), an N-terminal prosequence [segments 2a-r] (residues 29-198 [−170 to −1]), a mature protease [segments 3a-t] (residues 199-387 [1-189]), and a C-terminal prosequence [segments 4a-1] (residues 388-495 [190-398]) encoded by the DNA sequences set forth in SEQ ID NOS:1, 2, 3 and 4. The N-terminal sequence of the mature protease amino acid sequence is in bold.








(SEQ ID NO: 6)










1
MTPRTVTRAL AVATAAATLL AGGMAAQA NE PAPPGSASAP PRLAEKLDPD




1a       1b         1c      2a 2b         2c


 


51
LLEAMERDLG LDAEEAAATL AFQHDAAETG EALAEELDED FAGTWVEDDV



    2d         2e         2f         2g        2h


 


101
LYVATTDEDA VEEVEGEGAT AVTVEHSLAD LEAWKTVLDA ALEGHDDVPT



    2i         2j         2k         2l        2m


 


151
WYVDVPTNSV WAVKAGAQD VAAGLVEGAD VPSDAVTFVE TDETPRTM FD



    2n         2o        2p         2q        2r    3a


 


201
VIGGNAYTIG GRSRCSIGFA VNGGFITAGH CGRTGATTAN PTGTFAGSSF



    3b         3c         3d         3e        3f


 


251
PGNDYAFVRT GAGVNLLAQV NNYSGGRVQV AGHTAAPVGS AVCRSGSTTG



    3g         3h         3i         3j        3k


 


301
WHCGTITALN SSVTYPEGTV RGLIRTTVCA EPGDSGGSLL AGNQAQGVTS



    3l         3m         3n         3o        3p


 


351
GGSGNCRTGG TTFFQPVNPI LQAYGLRMIT TDSGSSP APA PTSCTGYART



    3q         3r         3s         3t      4a 4b


 


401
FTGTLAAGRA AAQPNGSYVQ VNRSGTHSVC LNGPSGADFD LYVQRWNGSS



    4c         4d         4e         4f        4g


 


451
WVTVAQSTSP GSNETITYRG NAGYYRYVVN AASGSGAYTM GLTLP



    4h         4i         4j         4k       4l






The following sequence (SEQ ID NO:7) is the amino acid sequence of the precursor protease derived from Cellulomonas strain 69B4 (DSM 16035) (SEQ ID NO:7).








(SEQ ID NO: 7)










1
NEPAPPGSAS APPRLAEKLD PDLLEAMERD.LGLDAEEAAA.TLAFQHDAAE



 


51
TGEALAEELD EDFAGTWVED DVLYVATTDE DAVEEVEGEG ATAVTVEHSL


 


101
ADLEAWKTVL DAALEGHDDV PTWYVDVPTN SVVVAVKAGA QDVAAGLVEG


 


151
ADVPSDAVTF VETDETPRTM FDVIGGNAYT IGGRSRCSIG FAVNGGFITA


 


201
GHCGRTGATT ANPTGTFAGS SFPGNDYAFV RTGAGVNLLA QVNNYSGGRV


 


251
QVAGHTAAPV GSAVCRSGST TGWHCGTITA LNSSVTYPEG TVRGLIRTTV


 


301
CAEPGDSGGS LLAGNQAQGV TSGGSGNCRT GGTTFFQPVN PILQAYGLRM


 


351
ITTDSGSSPA PAPTSCTGYA RTFTGTLAAG RAAAQPNGSY VQVNRSGTHS


 


401
VCLNGPSGAD FDLYVQRWNG SSWVTVAQST SPGSNETITY RGNAGYYRYV


 


451
VNAASGSGAY TMGLTLP






The following sequence (SEQ ID NO:8) is the amino acid sequence of the mature protease derived from Cellulomonas strain 69B4 (DSM 16035). The catalytic triad residues H32, D56 and S132 are bolded and underlined.








(SEQ ID NO: 8)










1
FDVIGGNAYT IGGRSRCSIG FAVNGGFITA GHCGRTGATT ANPTGTFAGS



 


51
SFPGNDYAFV RTGAGVNLLA QVNNYSGGRV QVAGHTAAPV GSAVCRSGST


 


101
TGWHCGTITA LNSSVTYPEG TVRGLIRTTV CAEPGDSGGS LLAGNQAQGV


 


151
TSGGSGNCRT GGTTFFQPVN PILQAYGLRM ITTDSGSSP






The following sequence (SEQ ID NO:9) is the amino acid sequence of the signal peptide of the protease derived from Cellulomonas strain 69B4 (DSM 16035).









1
MTPRTVTRAL AVATAAATLL AGGMAAQA
(SEQ ID NO: 9)






In some embodiments, the present invention encompasses variants that comprise at least a portion of the approximately 1621 base pairs in length polynucleotide set forth in SEQ. ID NO:1. In some particularly preferred embodiments, the present invention provides variants that have multiple mutations as compared to the wild-type (e.g., “parent”) serine protease. In some of these more particularly preferred embodiments, these multiply mutated variants exhibit improved performance, as compared to the wild-type (e.g., “parent”) serine protease.
As will be understood by the skilled artisan, due to the degeneracy of the genetic code, a variety of polynucleotides can encode the signal peptide, precursor protease and/or mature protease provided herein and/or in U.S. patent application Ser. No. 10/576,331, incorporated by reference in its entirety (e.g., SEQ ID NOS:6, 7, and/or 8 of U.S. patent application Ser. No. 10/576,331) or a protease having the % sequence identity described above. Another embodiment of the present invention encompasses a polynucleotide comprising a nucleotide sequence having at least 70% sequence identity, at least 75% sequence identity, at least 80% sequence identity, at least 85% sequence identity, at least 90% sequence identity, at least 92% sequence identity, at least 95% sequence identity, at least 97% sequence identity, at least 98% sequence identity and at least 99% sequence identity to the polynucleotide sequence of SEQ ID NOS, 2, 3, and/or 4, respectively, encoding the signal peptide and precursor protease, the precursor protease and/or the mature protease, respectively.
In additional embodiments, the present invention provides fragments or portions of DNA that encodes proteases, so long as the encoded fragment retains proteolytic activity. Another embodiment of the present invention encompasses polynucleotides having at least 20% of the sequence length, at least 30% of the sequence length, at least 40% of the sequence length, at least 50% of the sequence length, at least 60% of the sequence length, 70% of the sequence length, at least 75% of the sequence length, at least 80% of the sequence length, at least 85% of the sequence length, at least 90% of the sequence length, at least 92% of the sequence length, at least 95% of the sequence length, at least 97% of the sequence length, at least 98% of the sequence length and at least 99% of the sequence of the polynucleotide sequence of SEQ ID NO:1, encoding the precursor protease. In alternative embodiments, these fragments or portions of the sequence length are contiguous portions of the sequence length, useful for shuffling of the DNA sequence in recombinant DNA sequences (See e.g., U.S. Pat. No. 6,132,970)
Another embodiment of the invention includes fragments of the DNA described herein that find use according to art recognized techniques in obtaining partial length DNA fragments capable of being used to isolate or identify polynucleotides encoding mature protease enzyme described herein from Cellulomonas 69B4, or a segment thereof having proteolytic activity. Moreover, the DNA provided in SEQ ID NO:1 finds use in identifying homologous fragments of DNA from other species, and particularly from Cellulomonas spp. which encode a protease or portion thereof having proteolytic activity.
In addition, the present invention encompasses using primer or probe sequences constructed from SEQ ID NO:1, or a suitable portion or fragment thereof (e.g., at least about 5-20 or 10-15 contiguous nucleotides), as a probe or primer for screening nucleic acid of either genomic or cDNA origin. In some embodiments, the present invention provides DNA probes of the desired length (i.e., generally between 100 and 1000 bases in length), based on the sequences in SEQ ID NO:1.
In some embodiments, the DNA fragments are electrophoretically isolated, cut from the gel, and recovered from the agar matrix of the gel. In preferred embodiments, this purified fragment of DNA is then labeled (using, for example, the Megaprime labeling system according to the instructions of the manufacturer) to incorporate P32 in the DNA. The labeled probe is denatured by heating to 95° C. for a given period of time (e.g., 5 minutes), and immediately added to the membrane and prehybridization solution. The hybridization reaction proceeds for an appropriate time and under appropriate conditions (e.g., 18 hours at 37° C.), with gentle shaking or rotation. The membrane is rinsed (e.g., twice in SSC/0.3% SDS) and then washed in an appropriate wash solution with gentle agitation. The stringency desired is a reflection of the conditions under which the membrane (filter) is washed. In some embodiments herein, “low-stringency” conditions involve washing with a solution of 0.2×SSC/0.1% SDS at 20° C. for 15 minutes, while in other embodiments, “medium-stringency” conditions, involve a further washing step comprising washing with a solution of 0.2×SSC/0.1% SDS at 37° C. for 30 minutes, while in other embodiments, “high-stringency” conditions involve a further washing step comprising washing with a solution of 0.2×SSC/0.1% SDS at 37° C. for 45 minutes, and in further embodiments, “maximum-stringency” conditions involve a further washing step comprising washing with a solution of 0.2×SSC/0.1% SDS at 37° C. for 60 minutes. Thus, various embodiments of the present invention provide polynucleotides capable of hybridizing to a probed derived from the nucleotide sequence provided in SEQ ID NOS:1 or 2, under conditions of medium, high and/or maximum stringency.
After washing, the membrane is dried and the bound probe detected. If P32 or another radioisotope is used as the labeling agent, the bound probe is detected by autoradiography. Other techniques for the visualization of other probes are well-known to those of skill in the art. The detection of a bound probe indicates a nucleic acid sequence has the desired homology, and therefore identity, to any sequence of interest provided herein is encompassed by the present invention. Accordingly, the present invention provides methods for the detection of nucleic acid encoding a protease encompassed by the present invention which comprises hybridizing part or all of a nucleic acid sequence of SEQ ID NO:1 with other nucleic acid of either genomic or cDNA origin.
As indicated above, in other embodiments, hybridization conditions are based on the melting temperature (Tm) of the nucleic acid binding complex, to confer a defined “stringency” as explained below. “Maximum stringency” typically occurs at about Tm-5° C. (5° C. below the Tm of the probe); “high stringency” at about 5° C. to 10° C. below Tm; “intermediate stringency” at about 10° C. to 20° C. below Tm; and “low stringency” at about 20° C. to 25° C. below Tm. As known to those of skill in the art, medium, high and/or maximum stringency hybridization are chosen such that conditions are optimized to identify or detect polynucleotide sequence homologues or equivalent polynucleotide sequences.
In yet additional embodiments, the present invention provides nucleic acid constructs (i.e., expression vectors) comprising the polynucleotides encoding the proteases of the present invention. In further embodiments, the present invention provides host cells transformed with at least one of these vectors.
In further embodiments, the present invention provides polynucleotide sequences further encoding a signal sequence, as described in U.S. patent application Ser. No. 10/576,331, incorporated by reference in its entirety. In some of these embodiments, the present invention provides a sequence with a putative signal sequence, and polynucleotides being capable of hybridizing to a probe derived from the nucleotide sequence disclosed in SEQ ID NO:1 under conditions of medium, high and/or maximal stringency, wherein the signal sequences have substantially the same signal activity as the signal sequence encoded by the polynucleotide of the present invention.
In some embodiments, the signal activity is indicated by substantially the same level of secretion of the protease into the fermentation medium, as the starting material, as described in U.S. patent application Ser. No. 10/576,331. Additional means for determining the levels of secretion of a heterologous or homologous protein in a Gram-positive host cell and detecting secreted proteins include using either polyclonal or monoclonal antibodies specific for the protein. Examples include enzyme-linked immunosorbent assay (ELISA), radioimmunoassay (RIA) and fluorescent activated cell sorting (FACS), as well-known to those in the art.
Further aspects of the present invention encompass polypeptides having proteolytic activity comprising 65% amino acid sequence identity, at least 70% sequence identity, at least 75% amino acid sequence identity, at least 80% amino acid sequence identity, at least 85% amino acid sequence identity, at least 90% amino acid sequence identity, at least 92% amino acid sequence identity, at least 95% amino acid sequence identity, at least 97% amino acid sequence identity, at least 98% amino acid sequence identity and at least 99% amino acid sequence identity to the amino acid sequence of SEQ ID NOS:7 or 8, and as described herein and in U.S. patent application Ser. No. 10/576,331. The proteolytic activity of these polypeptides is determined using methods known in the art and include such methods as those used to assess detergent function. In further embodiments, the polypeptides are isolated.
III. Obtaining Polynucleotides Encoding Micrococcineae (e.g., Cellulomonas) Proteases of the Present Invention
In some embodiments, nucleic acid encoding a protease of the present invention is obtained by standard procedures known in the art from, for example, cloned DNA (e.g., a DNA “library”), chemical synthesis, cDNA cloning, PCR, cloning of genomic DNA or fragments thereof, or purified from a desired cell, such as a bacterial or fungal species (See, for example, Sambrook et al., supra [1989]; and Glover and Hames (eds.), DNA Cloning: A Practical Approach, Vols. 1 and 2, Second Edition). Synthesis of polynucleotide sequences is well known in the art (See e.g., Beaucage and Caruthers, Tetrahedron Lett., 22:1859-1862 [1981]), including the use of automated synthesizers (See e.g., Needham-VanDevanter et al., Nucl. Acids Res., 12:6159-6168 [1984]). DNA sequences can also be custom made and ordered from a variety of commercial sources. As described in greater detail herein, in some embodiments, nucleic acid sequences derived from genomic DNA contain regulatory regions in addition to coding regions.
In some embodiments involving the molecular cloning of the gene from genomic DNA, DNA fragments are generated, some of which comprise at least a portion of the desired gene. In some embodiments, the DNA is cleaved at specific sites using various restriction enzymes. In some alternative embodiments, DNAse is used in the presence of manganese to fragment the DNA, or the DNA is physically sheared (e.g., by sonication). The linear DNA fragments created are then be separated according to size and amplified by standard techniques, including but not limited to, agarose and polyacrylamide gel electrophoresis, PCR and column chromatography.
Once nucleic acid fragments are generated, identification of the specific DNA fragment encoding a protease may be accomplished in a number of ways. For example, in some embodiments, a proteolytic hydrolyzing enzyme encoding the asp gene or its specific RNA, or a fragment thereof, such as a probe or primer, is isolated, labeled, and then used in hybridization assays well known to those in the art, to detect a generated gene (See e.g., Benton and Davis, Science 196:180 [1977]; and Grunstein and Hogness, Proc. Natl. Acad. Sci. USA 72:3961 [1975]). In preferred embodiments, DNA fragments sharing substantial sequence similarity to the probe hybridize under medium to high stringency.
In some preferred embodiments, amplification is accomplished using PCR, as known in the art. In some preferred embodiments, a nucleic acid sequence of at least about 4 nucleotides and as many as about 60 nucleotides from SEQ ID NOS:1-5, (i.e., fragments), preferably about 12 to 30 nucleotides, and more preferably about 25 nucleotides are used in any suitable combinations as PCR primer. These same fragments also find use as probes in hybridization and product detection methods.
In some embodiments, isolation of nucleic acid constructs of the invention from a cDNA or genomic library utilizes PCR with using degenerate oligonucleotide primers prepared on the basis of the amino acid sequence of the protein., The primers can be of any segment length, for example at least 4, at least 5, at least 8, at least 15, at least 20, nucleotides in length.
In view of the above, it will be appreciated that the polynucleotide sequences provided herein and based on the polynucleotide sequences provided in SEQ ID NOS:1-5 are useful for obtaining identical or homologous fragments of polynucleotides from other species, and particularly from bacteria that encode enzymes having the serine protease activity expressed by protease 69B4. Additional sequences are provided in U.S. patent application Ser. No. 10/576,331.
IV. Multiple Mutation Variants of Serine Proteases of the Present Invention
As indicated herein, in particularly preferred embodiments, the present invention provides multiple mutation variants of serine protease. In some most particularly preferred embodiments, these variants exhibit improved performance as compared to the parent (e.g., wild-type) protease. In some of these most particularly preferred embodiments, the variants have improved wash performance, LAS stability, and/or proteolytic activity. Thus, these variants find use in numerous applications, including but not limited to dishwashing detergents, laundry detergents, and surface cleaning detergents.
V. Expression and Recovery of Serine Proteases of the Present Invention
Any suitable means for expression and recovery of the serine proteases of the present invention find use herein. Indeed, those of skill in the art know many methods suitable for cloning a Cellulomonas-derived polypeptide having proteolytic activity, as well as an additional enzyme (e.g., a second peptide having proteolytic activity, such as a protease, cellulase, mannanase, or amylase, etc.). Numerous methods are also known in the art for introducing at least one (e.g., multiple) copies of the polynucleotide(s) encoding the enzyme(s) of the present invention in conjunction with any additional sequences desired, into the genes or genome of host cells.
In general, standard procedures for cloning of genes and introducing exogenous proteases encoding regions (including multiple copies of the exogenous encoding regions) into said genes find use in obtaining a Cellulomonas 69B4 protease derivative or homologue thereof. Indeed, the present Specification, including the Examples provides such teaching. However, additional methods known in the art are also suitable (See e.g., Sambrook et al. supra (1989); Ausubel et al., supra [1995]; and Harwood and Cutting, (eds.) Molecular Biological Methods for Bacillus,” John Wiley and Sons, [1990]; and WO 96/34946).
In some preferred embodiments, the polynucleotide sequences of the present invention are expressed by operatively linking them to an expression control sequence in an appropriate expression vector and employed by that expression vector to transform an appropriate host according to techniques well established in the art. In some embodiments, the polypeptides produced on expression of the DNA sequences of this invention are isolated from the fermentation of cell cultures and purified in a variety of ways according to well-established techniques in the art. Those of skill in the art are capable of selecting the most appropriate isolation and purification techniques.
More particularly, the present invention provides constructs, vectors comprising polynucleotides described herein, host cells transformed with such vectors, proteases expressed by such host cells, expression methods and systems for the production of serine protease enzymes derived from microorganisms, in particular, members of the Micrococcineae, including but not limited to Cellulomonas species. In some embodiments, the polynucleotide(s) encoding serine protease(s) are used to produce recombinant host cells suitable for the expression of the serine protease(s). In some preferred embodiments, the expression hosts are capable of producing the protease(s) in commercially viable quantities. Additional details are provided in U.S. patent application Ser. No. 10/576,331.
VI. Recombinant Vectors and Host Cells
As indicated above, in some embodiments, the present invention provides vectors comprising the aforementioned polynucleotides. In some embodiments, the vectors (i.e., constructs) of the invention encoding the protease are of genomic origin (e.g., prepared though use of a genomic library and screening for DNA sequences coding for all or part of the protease by hybridization using synthetic oligonucleotide probes in accordance with standard techniques). These vectors are described in greater detail in U.S. patent application Ser. No. 10/576,331.
As indicated above, in some embodiments, the present invention also provides host cells transformed with the vectors described above. Additional host cells are described in greater detail in U.S. patent application Ser. No. 10/576,331.
VII. Applications for Serine Protease Enzymes
As described in greater detail herein, the proteases of the present invention have important characteristics that make them very suitable for certain applications. For example, the proteases of the present invention have enhanced thermal stability. In some embodiments, the enzymes also exhibit enhanced oxidative stability, and enhanced chelator stability, as compared to some currently used proteases. Thus, these proteases find use in cleaning compositions. Indeed, under certain wash conditions, the present proteases exhibit comparative or enhanced wash performance as compared with currently used subtilisin proteases. Thus, it is contemplated that the cleaning and/or enzyme compositions of the present invention will be provided in a variety of cleaning compositions. In some embodiments, the proteases of the present invention are utilized in the same manner as subtilisin proteases (i.e., proteases currently in use). Thus, the present proteases find use in various cleaning compositions, as well as animal feed applications, leather processing (e.g., bating), protein hydrolysis, and in textile uses. The identified proteases also find use in personal care applications.
Thus, the proteases of the present invention find use in a number of industrial applications, in particular within the cleaning, disinfecting, animal feed, and textile/leather industries. In some embodiments, the protease(s) of the present invention are combined with detergents, builders, bleaching agents and other conventional ingredients to produce a variety of novel cleaning compositions useful in the laundry and other cleaning arts such as, for example, laundry detergents (both powdered and liquid), laundry pre-soaks, all fabric bleaches, automatic dishwashing detergents (both liquid and powdered), household cleaners, particularly bar and liquid soap applications, and drain openers. In addition, the proteases find use in the cleaning of contact lenses, as well as other items, by contacting such materials with an aqueous solution of the cleaning composition. In addition these naturally occurring proteases can be used, for example in peptide hydrolysis, waste treatment, textile applications, medical device cleaning, biofilm removal and as fusion-cleavage enzymes in protein production, etc. The composition of these products is not critical to the present invention, as long as the protease(s) maintain their function in the setting used. In some embodiments, the compositions are readily prepared by combining a cleaning effective amount of the protease or an enzyme composition comprising the protease enzyme preparation with the conventional components of such compositions in their art recognized amounts.
The proteases of the present invention find particular use in the cleaning industry, including, but not limited to laundry and dish detergents. These applications place enzymes under various environmental stresses. The proteases of the present invention provide advantages over many currently used enzymes, due to their stability under various conditions.
Indeed, there are a variety of wash conditions including varying detergent formulations, wash water volumes, wash water temperatures, and lengths of wash time, to which proteases involved in washing are exposed. In addition, detergent formulations used in different geographical areas have different concentrations of their relevant components present in the wash water. For example, a European detergent typically has about 4500-5000 ppm of detergent components in the wash water, while a Japanese detergent typically has approximately 667 ppm of detergent components in the wash water. In North America, particularly the United States, detergents typically have about 975 ppm of detergent components present in the wash water.
A low detergent concentration system includes detergents where less than about 800 ppm of detergent components are present in the wash water. Japanese detergents are typically considered low detergent concentration system as they have approximately 667 ppm of detergent components present in the wash water.
A medium detergent concentration includes detergents where between about 800 ppm and about 2000 ppm of detergent components are present in the wash water. North American detergents are generally considered to be medium detergent concentration systems as they have approximately 975 ppm of detergent components present in the wash water. Brazil typically has approximately 1500 ppm of detergent components present in the wash water.
A high detergent concentration system includes detergents where greater than about 2000 ppm of detergent components are present in the wash water. European detergents are generally considered to be high detergent concentration systems as they have approximately 4500-5000 ppm of detergent components in the wash water.
Latin American detergents are generally high suds phosphate builder detergents and the range of detergents used in Latin America can fall in both the medium and high detergent concentrations as they range from 1500 ppm to 6000 ppm of detergent components in the wash water. As mentioned above, Brazil typically has approximately 1500 ppm of detergent components present in the wash water. However, other high suds phosphate builder detergent geographies, not limited to other Latin American countries, may have high detergent concentration systems up to about 6000 ppm of detergent components present in the wash water.
In light of the foregoing, it is evident that concentrations of detergent compositions in typical wash solutions throughout the world varies from less than about 800 ppm of detergent composition (“low detergent concentration geographies”), for example about 667 ppm in Japan, to between about 800 ppm to about 2000 ppm (“medium detergent concentration geographies”), for example about 975 ppm in U.S. and about 1500 ppm in Brazil, to greater than about 2000 ppm (“high detergent concentration geographies”), for example about 4500 ppm to about 5000 ppm in Europe and about 6000 ppm in high suds phosphate builder geographies.
The concentrations of the typical wash solutions are determined empirically. For example, in the U.S., a typical washing machine holds a volume of about 64.4 L of wash solution. Accordingly, in order to obtain a concentration of about 975 ppm of detergent within the wash solution about 62.79 g of detergent composition must be added to the 64.4 L of wash solution. This amount is the typical amount measured into the wash water by the consumer using the measuring cup provided with the detergent.
As a further example, different geographies use different wash temperatures. The temperature of the wash water in Japan is typically less than that used in Europe. For example, the temperature of the wash water in North America and Japan can be between 10 and 30° C. (e.g., about 20° C.), whereas the temperature of wash water in Europe is typically between 30 and 60° C. (e.g., about 40° C.).
As a further example, different geographies typically have different water hardness. Water hardness is usually described in terms of the grains per gallon mixed Ca2+/Mg2+. Hardness is a measure of the amount of calcium (Ca2+) and magnesium (Mg2+) in the water. Most water in the United States is hard, but the degree of hardness varies. Moderately hard (60-120 ppm) to hard (121-181 ppm) water has 60 to 181 parts per million (parts per million converted to grains per U.S. gallon is ppm # divided by 17.1 equals grains per gallon) of hardness minerals (See, Table 13-1).
European water hardness is typically greater than 10.5 (e.g., 10.5-20.0) grains per gallon mixed Ca2+/Mg2+ (e.g., about 15 grains per gallon mixed Ca2+/Mg2+). North American water hardness is typically greater than Japanese water hardness, but less than European water hardness. For example, North American water hardness can be between 3 to 10 grains, 3-8 grains or about 6 grains. Japanese water hardness is typically lower than North American water hardness, usually less than 4, for example 3 grains per gallon mixed Ca2+/Mg2+.
Accordingly, in some embodiments, the present invention provides proteases that show surprising wash performance in at least one set of wash conditions (e.g., water temperature, water hardness, and/or detergent concentration). In some embodiments, the proteases of the present invention are comparable in wash performance to subtilisin proteases. In some embodiments, the proteases of the present invention exhibit enhanced wash performance as compared to subtilisin proteases. Thus, in some preferred embodiments of the present invention, the proteases provided herein exhibit enhanced oxidative stability, enhanced thermal stability, and/or enhanced chelator stability.
In some preferred embodiments, the present invention provides the ASP protease, as well as homologues and variants of the protease. In particularly preferred embodiments, the ASP variants comprise multiple substitutions in the wild-type ASP protease sequence. These proteases find use in any applications in which it is desired to clean protein based stains from textiles or fabrics.
In some embodiments, the cleaning compositions of the present invention are formulated as hand and machine laundry detergent compositions including laundry additive compositions, and compositions suitable for use in the pretreatment of stained fabrics, rinse-added fabric softener compositions, and compositions for use in general household hard surface cleaning operations, as well as dishwashing operations. Those in the art are familiar with different formulations which can be used as cleaning compositions. In preferred embodiments, the proteases of the present invention comprise comparative or enhanced performance in detergent compositions (i.e., as compared to other proteases). In some embodiments, cleaning performance is evaluated by comparing the proteases of the present invention with subtilisin proteases in various cleaning assays that utilize enzyme-sensitive stains such as egg, grass, blood, milk, etc., in standard methods. Indeed, those in the art are familiar with the spectrophotometric and other analytical methodologies used to assess detergent performance under standard wash cycle conditions.
Assays that find use in the present invention include, but are not limited to those described in WO 99/34011, and U.S. Pat. No. 6,605,458 (See e.g., Example 3). In U.S. Pat. No. 6,605,458, at Example 3, a detergent dose of 3.0 g/l at pH 10.5, wash time 15 minutes, at 15 C, water hardness of 6° dH, 10 nM enzyme concentration in 150 ml glass beakers with stirring rod, 5 textile pieces (phi 2.5 cm) in 50 ml, EMPA 117 test material from Center for Test Materials Holland are used. The measurement of reflectance “R” on the test material was done at 460 nm using a Macbeth ColorEye 7000 photometer. Additional methods are provided in the Examples herein. Thus, these methods also find use in the present invention.
The addition of proteases of the invention to conventional cleaning compositions does not create any special use limitation. In other words, any temperature and pH suitable for the detergent is also suitable for the present compositions, as long as the pH is within the range set forth herein, and the temperature is below the described protease's denaturing temperature. In addition, proteases of the present invention find use in cleaning compositions that do not include detergents, again either alone or in combination with builders and stabilizers.
When used in cleaning compositions or detergents, oxidative stability is a further consideration. Thus, in some applications, the stability is enhanced, diminished, or comparable to subtilisin proteases as desired for various uses. In some preferred embodiments, enhanced oxidative stability is desired. Some of the proteases of the present invention find particular use in such applications.
When used in cleaning compositions or detergents, thermal stability is a further consideration. Thus, in some applications, the stability is enhanced, diminished, or comparable to subtilisin proteases as desired for various uses. In some preferred embodiments, enhanced thermostability is desired. Some of the proteases of the present invention find particular use in such applications.
When used in cleaning compositions or detergents, chelator stability is a further consideration. Thus, in some applications, the stability is enhanced, diminished, or comparable to subtilisin proteases as desired for various uses. In some preferred embodiments, enhanced chelator stability is desired. Some of the proteases of the present invention find particular use in such applications.
In some embodiments of the present invention, naturally occurring proteases are provided which exhibit modified enzymatic activity at different pHs when compared to subtilisin proteases. A pH-activity profile is a plot of pH against enzyme activity and may be constructed as described in the Examples and/or by methods known in the art. In some embodiments, it is desired to obtain naturally occurring proteases with broader profiles (i.e., those having greater activity at range of pHs than a comparable subtilisin protease). In other embodiments, the enzymes have no significantly greater activity at any pH, or naturally occurring homologues with sharper profiles (i.e., those having enhanced activity when compared to subtilisin proteases at a given pH, and lesser activity elsewhere). Thus, in various embodiments, the proteases of the present invention have differing pH optima and/or ranges. It is not intended that the present invention be limited to any specific pH or pH range.
In some embodiments of the present invention, the cleaning compositions comprise, proteases of the present invention at a level from 0.00001% to 10% of 69B4 and/or other proteases of the present invention by weight of the composition and the balance (e.g., 99.999% to 90.0%) comprising cleaning adjunct materials by weight of composition. In other aspects of the present invention, the cleaning compositions of the present invention comprise, the 69B4 and/or other proteases at a level of 0.0001% to 10%, 0.001% to 5%, 0.001% to 2%, 0.005% to 0.5% 69B4 or other protease of the present invention by weight of the composition and the balance of the cleaning composition (e.g., 99.9999% to 90.0%, 99.999% to 98%, 99.995% to 99.5% by weight) comprising cleaning adjunct materials.
In some embodiments, preferred cleaning compositions, in addition to the protease preparation of the invention, comprise one or more additional enzymes or enzyme derivatives which provide cleaning performance and/or fabric care benefits. Such enzymes include, but are not limited to other proteases, lipases, cutinases, amylases, cellulases, peroxidases, oxidases (e.g. laccases), and/or mannanases.
Any other protease suitable for use in alkaline solutions finds use in the compositions of the present invention. Suitable proteases include those of animal, vegetable or microbial origin. In particularly preferred embodiments, microbial proteases are used. In some embodiments, chemically or genetically modified mutants are included. In some embodiments, the protease is a serine protease, preferably an alkaline microbial protease or a trypsin-like protease. Examples of alkaline proteases include subtilisins, especially those derived from Bacillus (e.g., subtilisin, lentus, amyloliquefaciens, subtilisin Carlsberg, subtilisin 309, subtilisin 147 and subtilisin 168). Additional examples include those mutant proteases described in U.S. Pat. Nos. RE 34,606, 5,955,340, 5,700,676, 6,312,936, and 6,482,628, all of which are incorporated herein by reference. Additional protease examples include, but are not limited to trypsin (e.g., of porcine or bovine origin), and the hprotease described in WO 89/06270. Preferred commercially available protease enzymes include those sold under the trade names MAXATASE®, MAXACALTM, MAXAPEMTM, OPTICLEAN®; OPTIMASE®, PROPERASE®, PURAFECT® and PURAFECT® OXP (Genencor), those sold under the trade names ALCALASE®, SAVINASE®, PRIMASE®, DURAZYMTM, RELASE® and ESPERASE® (Novozymes); and those sold under the trade name BLAPTM (Henkel Kommanditgesellschaft auf Aktien, Duesseldorf, Germany. Various proteases are described in WO95/23221, WO 92/21760, and U.S. Pat. Nos. 5,801,039, 5,340,735, 5,500,364, 5,855,625. An additional BPN′ variant (“BPN′-var I” and “BPN-variant I”; as referred to herein) is described in U.S. RE 34, 606. An additional GG36-variant (“GG36-var.1” and “GG36-variant 1”; as referred to herein) is described in U.S. Pat. Nos. 5,955,340 and 5,700,676. A further GG36-variant is described in U.S. Pat. Nos. 6,312,936 and 6,482,628. In one aspect of the present invention, the cleaning compositions of the present invention comprise additional protease enzymes at a level from 0.00001% to 10% of additional protease by weight of the composition and 99.999% to 90.0% of cleaning adjunct materials by weight of composition. In other embodiments of the present invention, the cleaning compositions of the present invention also comprise, proteases at a level of 0.0001% to 10%, 0.001% to 5%, 0.001% to 2%, 0.005% to 0.5% 69B4 protease (or its homologues or variants) by weight of the composition and the balance of the cleaning composition (e.g., 99.9999% to 90.0%, 99.999% to 98%, 99.995% to 99.5% by weight) comprising cleaning adjunct materials.
In addition, any lipase suitable for use in alkaline solutions finds use in the present invention. Suitable lipases include, but are not limited to those of bacterial or fungal origin. Chemically or genetically modified mutants are encompassed by the present invention. Examples of useful lipases include Humicola lanuginosa lipase (See e.g., EP 258 068, and EP 305 216), Rhizomucor miehei lipase (See e.g., EP 238 023), Candida lipase, such as C. antarctica lipase (e.g., the C. antarctica lipase A or B; See e.g., EP 214 761), a Pseudomonas lipase such as P. alcaligenes and P. pseudoalcaligenes lipase (See e.g., EP 218 272), P. cepacia lipase (See e.g., EP 331 376), P. stutzeri lipase (See e.g., GB 1,372,034), P. fluorescens lipase, Bacillus lipase (e.g., B. subtilis lipase [Dartois et al., Biochem. Biophys. Acta 1131:253-260 [1993]); B. stearothermophilus lipase [See e.g., JP 64/744992]; and B. pumilus lipase [See e.g., WO 91/16422]).
Furthermore, a number of cloned lipases find use in some embodiments of the present invention, including but not limited to Penicillium camembertii lipase (See, Yamaguchi et al., Gene 103:61-67 [1991]), Geotricum candidum lipase (See, Schimada et al., J. Biochem., 106:383-388 [1989]), and various Rhizopus lipases such as R. delemar lipase (See, Hass et al., Gene 109:117-113 [1991]), a R. niveus lipase (Kugimiya et al., Biosci. Biotech. Biochem. 56:716-719 [1992]) and R. oryzae lipase.
Other types of lipolytic enzymes such as cutinases also find use in some embodiments of the present invention, including but not limited to the cutinase derived from Pseudomionas mendocina (See, WO 88/09367), or cutinase derived from Fusarium solani pisi (See, WO 90/09446).
Additional suitable lipases include commercially available lipases such as MI LIPASETM, LUMA FASTTM, and LIPOMAXTM (Genencor); LIPOLASE® and LIPOLASE® ULTRA (Novozymes); and LIPASE PTM “Amano” (Amano Pharmaceutical Co. Ltd., Japan).
In some embodiments of the present invention, the cleaning compositions of the present invention further comprise lipases at a level from 0.00001% to 10% of additional lipase by weight of the composition and the balance of cleaning adjunct materials by weight of composition. In other aspects of the present invention, the cleaning compositions of the present invention also comprise, lipases at a level of 0.0001% to 10%, 0.001% to 5%, 0.001% to 2%, 0.005% to 0.5% lipase by weight of the composition.
Any amylase (alpha and/or beta) suitable for use in alkaline solutions also find use in some embodiments of the present invention. Suitable amylases include, but are not limited to those of bacterial or fungal origin. Chemically or genetically modified mutants are included in some embodiments. Amylases that find use in the present invention, include, but are not limited to α-amylases obtained from B. licheniformis (See e.g., GB 1,296,839). Commercially available amylases that find use in the present invention include, but are not limited to DURAMYL®, TERMAMYL®, FUNGAMYL®, STAINZYME®, and BANTM (Novozymes) and RAPIDASE®, and MAXAMYL® P (Genencor International). In some embodiments of the present invention, the cleaning compositions of the present invention further comprise amylases at a level from 0.00001% to 10% of additional amylase by weight of the composition and the balance of cleaning adjunct materials by weight of composition. In other aspects of the present invention, the cleaning compositions of the present invention also comprise, amylases at a level of 0.0001% to 10%, 0.001% to 5%, 0.001% to 2%, 0.005% to 0.5% amylase by weight of the composition.
Any cellulase suitable for use in alkaline solutions find use in embodiments of the present invention. Suitable cellulases include, but are not limited to those of bacterial or fungal origin. Chemically or genetically modified mutants are included in some embodiments. Suitable cellulases include, but are not limited to Humicola insolens cellulases (See e.g., U.S. Pat. No. 4,435,307). Especially suitable cellulases are the cellulases having color care benefits (See e.g., EP 0 495 257).
Commercially available cellulases that find use in the present include, but are not limited to CELLUZYME® (Novozymes), and KAC-500(B)TM (Kao Corporation). In some embodiments, cellulases are incorporated as portions or fragments of mature wild-type or variant cellulases, wherein a portion of the N-terminus is deleted (See e.g., U.S. Pat. No. 5,874,276).
In some embodiments, the cleaning compositions of the present invention can further comprise cellulases at a level from 0.00001% to 10% of additional cellulase by weight of the composition and the balance of cleaning adjunct materials by weight of composition. In other aspects of the present invention, the cleaning compositions of the present invention also comprise cellulases at a level of 0.0001% to 10%, 0.001% to 5%, 0.001% to 2%, 0.005% to 0.5% cellulase by weight of the composition.
Any mannanases suitable for use in detergent compositions and or alkaline solutions find use in the present invention. Suitable mannanases include, but are not limited to those of bacterial or fungal origin. Chemically or genetically modified mutants are included in some embodiments. Various mannanases are known which find use in the present invention (See e.g., U.S. Pat. No. 6,566,114, U.S. Pat. No. 6,602,842, and U.S. Pat. No. 6,440,991, all of which are incorporated herein by reference).
In some embodiments, the cleaning compositions of the present invention can further comprise mannanases at a level from 0.00001% to 10% of additional mannanase by weight of the composition and the balance of cleaning adjunct materials by weight of composition. In other aspects of the present invention, the cleaning compositions of the present invention also comprise, mannanases at a level of 0.0001% to 10%, 0.001% to 5%, 0.001% to 2%, 0.005% to 0.5% mannanases by weight of the composition.
In some embodiments, peroxidases are used in combination with hydrogen peroxide or a source thereof (e.g., a percarbonate, perborate or persulfate). In alternative embodiments, oxidases are used in combination with oxygen. Both types of enzymes are used for “solution bleaching” (i.e., to prevent transfer of a textile dye from a dyed fabric to another fabric when the fabrics are washed together in a wash liquor), preferably together with an enhancing agent (See e.g., WO 94/12621 and WO 95/01426). Suitable peroxidases/oxidases include, but are not limited to those of plant, bacterial or fungal origin. Chemically or genetically modified mutants are included in some embodiments.
In some embodiments, the cleaning compositions of the present invention can further comprise peroxidase and/or oxidase enzymes at a level from 0.00001% to 10% of additional peroxidase and/or oxidase by weight of the composition and the balance of cleaning adjunct materials by weight of composition. In other aspects of the present invention, the cleaning compositions of the present invention also comprise, peroxidase and/or oxidase enzymes at a level of 0.0001% to 10%, 0.001% to 5%, 0.001% to 2%, 0.005% to 0.5% peroxidase and/or oxidase enzymes by weight of the composition.
Mixtures of the above mentioned enzymes are encompassed herein, in particular a mixture of a the 69B4 enzyme, one or more additional proteases, at least one amylase, at least one lipase, at least one mannanase, and/or at least one cellulase. Indeed, it is contemplated that various mixtures of these enzymes will find use in the present invention.
It is contemplated that the varying levels of the protease and one or more additional enzymes may both independently range to 10%, the balance of the cleaning composition being cleaning adjunct materials. The specific selection of cleaning adjunct materials are readily made by considering the surface, item, or fabric to be cleaned, and the desired form of the composition for the cleaning conditions during use (e.g., through the wash detergent use).
Examples of suitable cleaning adjunct materials include, but are not limited to, surfactants, builders, bleaches, bleach activators, bleach catalysts, other enzymes, enzyme stabilizing systems, chelants, optical brighteners, soil release polymers, dye transfer agents, dispersants, suds suppressors, dyes, perfumes, colorants, filler salts, hydrotropes, photoactivators, fluorescers, fabric conditioners, hydrolyzable surfactants, preservatives, anti-oxidants, anti-shrinkage agents, anti-wrinkle agents, germicides, fungicides, color speckles, silvercare, anti-tarnish and/or anti-corrosion agents, alkalinity sources, solubilizing agents, carriers, processing aids, pigments, and pH control agents (See e.g., U.S. Pat. Nos. 6,610,642, 6,605,458, 5,705,464, 5,710,115, 5,698,504, 5,695,679, 5,686,014 and 5,646,101, all of which are incorporated herein by reference). Embodiments of specific cleaning composition materials are exemplified in detail below.
If the cleaning adjunct materials are not compatible with the proteases of the present invention in the cleaning compositions, then suitable methods of keeping the cleaning adjunct materials and the protease(s) separated (i.e., not in contact with each other) until combination of the two components is appropriate are used. Such separation methods include any suitable method known in the art (e.g., gelcaps, encapulation, tablets, physical separation, etc.).
Preferably an effective amount of one or more protease(s) provided herein are included in compositions useful for cleaning a variety of surfaces in need of proteinaceous stain removal. Such cleaning compositions include cleaning compositions for such applications as cleaning hard surfaces, fabrics, and dishes. Indeed, in some embodiments, the present invention provides fabric cleaning compositions, while in other embodiments, the present invention provides non-fabric cleaning compositions. Notably, the present invention also provides cleaning compositions suitable for personal care, including oral care (including dentrifices, toothpastes, mouthwashes, etc., as well as denture cleaning compositions), skin, and hair cleaning compositions. It is intended that the present invention encompass detergent compositions in any form (i.e., liquid, granular, bar, semi-solid, gels, emulsions, tablets, capsules, etc.).
By way of example, several cleaning compositions wherein the protease of the present invention find use are described in greater detail below. In embodiments in which the cleaning compositions of the present invention are formulated as compositions suitable for use in laundry machine washing method(s), the compositions of the present invention preferably contain at least one surfactant and at least one builder compound, as well as one or more cleaning adjunct materials preferably selected from organic polymeric compounds, bleaching agents, additional enzymes, suds suppressors, dispersants, lime-soap dispersants, soil suspension and anti-redeposition agents and corrosion inhibitors. In some embodiments, laundry compositions also contain softening agents (i.e., as additional cleaning adjunct materials).
The compositions of the present invention also find use detergent additive products in solid or liquid form. Such additive products are intended to supplement and/or boost the performance of conventional detergent compositions and can be added at any stage of the cleaning process.
In embodiments formulated as compositions for use in manual dishwashing methods, the compositions of the invention preferably contain at least one surfactant and preferably at least one additional cleaning adjunct material selected from organic polymeric compounds, suds enhancing agents, group II metal ions, solvents, hydrotropes and additional enzymes.
In some embodiments, the density of the laundry detergent compositions herein ranges from 400 to 1200 g/liter, while in other embodiments, it ranges from 500 to 950 g/liter of composition measured at 20° C.
In some embodiments, various cleaning compositions such as those provided in U.S. Pat. No. 6,605,458 find use with the proteases of the present invention. Thus, in some embodiments, the compositions comprising at least one protease of the present invention is a compact granular fabric cleaning composition, while in other embodiments, the composition is a granular fabric cleaning composition useful in the laundering of colored fabrics, in further embodiments, the composition is a granular fabric cleaning composition which provides softening through the wash capacity, in additional embodiments, the composition is a heavy duty liquid fabric cleaning composition.
In some embodiments, the compositions comprising at least one protease of the present invention are fabric cleaning compositions such as those described in U.S. Pat. No. 6,610,642 and U.S. Pat. No. 6,376,450. In addition, the proteases of the present invention find use in granular laundry detergent compositions of particular utility under European or Japanese washing conditions (See e.g., U.S. Pat. No. 6,610,642).
In alternative embodiments, the present invention provides hard surface cleaning compositions comprising at least one protease provided herein. Thus, in some embodiments, the compositions comprising at least one protease of the present invention is a hard surface cleaning composition such as those described in U.S. Pat. Nos. 6,610,642, U.S. Pat. No. 6,376,450, and U.S. Pat. No. 6,376,450.
In yet further embodiments, the present invention provides dishwashing compositions comprising at least one protease provided herein. Thus, in some embodiments, the compositions comprising at least one protease of the present invention is a hard surface cleaning composition such as those in U.S. Pat. No. 6,610,642, and U.S. Pat. No. 6,376,450.
In still further embodiments, the present invention provides dishwashing compositions comprising at least one protease provided herein. Thus, in some embodiments, the compositions comprising at least one protease of the present invention comprise oral care compositions such as those in U.S. Pat. No. 6,376,450, and U.S. Pat. No. 6,376,450.
The formulations and descriptions of the compounds and cleaning adjunct materials contained in the aforementioned U.S. Pat. Nos. 6,376,450; 6,605,458; 6,605,458; and 6,610,642 are expressly incorporated by reference herein. Still further examples are set forth in the Examples below.
Still further, the present invention provides compositions and methods for the production of a food or animal feed, characterized in that protease according to the invention is mixed with food or animal feed. In some embodiments, the protease is added as a dry product before processing, while in other embodiments it is added as a liquid before or after processing. In some embodiments, in which a dry powder is used, the enzyme is diluted as a liquid onto a dry carrier such as milled grain. The proteases of the present invention find use as components of animal feeds and/or additives such as those described in, U.S. Pat. No. 5,612,055, U.S. Pat. No. 5,314,692, and U.S. Pat. No. 5,147,642, all of which are hereby incorporated by reference.
The enzyme feed additive according to the present invention is suitable for preparation in a number of methods. For example, in some embodiments, it is prepared simply by mixing different enzymes having the appropriate activities to produce an enzyme mix. In some embodiments, this enzyme mix is mixed directly with a feed, while in other embodiments, it is impregnated onto a cereal-based carrier material such as milled wheat, maize or soya flour. The present invention also encompasses these impregnated carriers, as they find use as enzyme feed additives.
In some alternative embodiments, a cereal-based carrier (e.g., milled wheat or maize) is impregnated either simultaneously or sequentially with enzymes having the appropriate activities. For example, in some embodiments, a milled wheat carrier is first sprayed with a xylanase, secondly with a protease, and optionally with a O-glucanase. The present invention also encompasses these impregnated carriers, as they find use as enzyme feed additives. In preferred embodiments, these impregnated carriers comprise at least one protease of the present invention.
In some embodiments, the feed additive of the present invention is directly mixed with the animal feed, while in alternative embodiments, it is mixed with one or more other feed additives such as a vitamin feed additive, a mineral feed additive, and/or an amino acid feed additive. The resulting feed additive including several different types of components is then mixed in an appropriate amount with the feed.
In some preferred embodiments, the feed additive of the present invention, including cereal-based carriers is normally mixed in amounts of 0.01-50 g per kilogram of feed, more preferably 0.1-10 g/kilogram, and most preferably about 1 g/kilogram.
In alternative embodiments, the enzyme feed additive of the present invention involves construction of recombinant microorganisms that produces the desired enzyme(s) in the desired relative amounts. In some embodiments, this is accomplished by increasing the copy number of the gene encoding at least one protease of the present invention, and/or by using a suitably strong promoter operatively linked to the polynucleotide encoding the protease(s). In further embodiments, the recombinant microorganism strain has certain enzyme activities deleted (e.g., cellulases, endoglucanases, etc.), as desired.
In additional embodiments, the enzyme feed additives provided by the present invention also include other enzymes, including but not limited to at least one xylanase, α-amylase, glucoamylase, pectinase, mannanase, α-galactosidase, phytase, and/or lipase. In some embodiments, the enzymes having the desired activities are mixed with the xylanase and protease either before impregnating these on a cereal-based carrier or alternatively such enzymes are impregnated simultaneously or sequentially on such a cereal-based carrier. The carrier is then in turn mixed with a cereal-based feed to prepare the final feed. In alternative embodiments, the enzyme feed additive is formulated as a solution of the individual enzyme activities and then mixed with a feed material pre-formed as pellets or as a mash.
In still further embodiments, the enzyme feed additive is included in animals' diets by incorporating it into a second (i.e., different) feed or the animals' drinking water. Accordingly, it is not essential that the enzyme mix provided by the present invention be incorporated into the cereal-based feed itself, although such incorporation forms a particularly preferred embodiment of the present invention. The ratio of the units of xylanase activity per g of the feed additive to the units of protease activity per g of the feed additive is preferably 1:0.001-1,000, more preferably 1:0.01-100, and most preferably 1:0.1-10. As indicated above, the enzyme mix provided by the present invention preferably finds use as a feed additive in the preparation of a cereal-based feed.
In some embodiments, the cereal-based feed comprises at least 25% by weight, or more preferably at least 35% by weight, wheat or maize or a combination of both of these cereals. The feed further comprises a protease (i.e., at least one protease of the present invention) in such an amount that the feed includes a protease in such an amount that the feed includes 100-100,000 units of protease activity per kg.
Cereal-based feeds provided the present invention according to the present invention find use as feed for a variety of non-human animals, including poultry (e.g., turkeys, geese, ducks, chickens, etc.), livestock (e.g., pigs, sheep, cattle, goats, etc.), and companion animals (e.g., horses, dogs, cats, rabbits, mice, etc.). The feeds are particularly suitable for poultry and pigs, and in particular broiler chickens.
The present invention also provides compositions for the treatment of textiles that include at least one of the proteases of the present invention. In some embodiments, at least one protease of the present invention is a component of compositions suitable for the treatment of silk or wool (See e.g., U.S. RE Pat. No. 216,034, EP 134,267, U.S. Pat. No. 4,533,359, and EP 344,259).
In addition, the proteases of the present invention find use in a variety of applications where it is desirable to separate phosphorous from phytate. Accordingly, the present invention also provides methods producing wool or animal hair material with improved properties. In some preferred embodiments, these methods comprise the steps of pretreating wool, wool fibres or animal hair material in a process selected from the group consisting of plasma treatment processes and the Delhey process; and subjecting the pretreated wool or animal hair material to a treatment with a proteolytic enzyme (e.g., at least one protease of the present invention) in an amount effective for improving the properties. In some embodiments, the proteolytic enzyme treatment occurs prior to the plasma treatment, while in other embodiments, it occurs after the plasma treatment. In some further embodiments, it is conducted as a separate step, while in other embodiments, it is conducted in combination with the scouring or the dyeing of the wool or animal hair material. In additional embodiments, at least one surfactant and/or at least one softener is present during the enzyme treatment step, while in other embodiments, the surfactant(s) and/or softener(s) are incorporated in a separate step wherein the wool or animal hair material is subjected to a softening treatment.
In some embodiments, the compositions of the present invention find use in methods for shrink-proofing wool fibers (See e.g., JP 4-327274). In some embodiments, the compositions are used in methods for shrink-proofing treatment of wool fibers by subjecting the fibers to a low-temperature plasma treatment, followed by treatment with a shrink-proofing resin such as a block-urethane resin, polyamide epochlorohydrin resin, glyoxalic resin, ethylene-urea resin or acrylate resin, and then treatment with a weight reducing proteolytic enzyme for obtaining a softening effect). In some embodiments, the plasma treatment step is a low-temperature treatment, preferably a corona discharge treatment or a glow discharge treatment.
In some embodiments, the low-temperature plasma treatment is carried out by using a gas, preferably a gas selected from the group consisting of air, oxygen, nitrogen, ammonia, helium, or argon. Conventionally, air is used but it may be advantageous to use any of the other indicated gasses.
Preferably, the low-temperature plasma treatment is carried out at a pressure between about 0.1 torr and 5 torr for from about 2 seconds to about 300 seconds, preferably for about 5 seconds to about 100 seconds, more preferably from about 5 seconds to about 30 seconds.
As indicated above, the present invention finds use in conjunction with methods such as the Delhey process (See e.g., DE-A-43 32 692). In this process, the wool is treated in an aqueous solution of hydrogen peroxide in the presence of soluble wolframate, optionally followed by treatment in a solution or dispersion of synthetic polymers, for improving the anti-felting properties of the wool. In this method, the wool is treated in an aqueous solution of hydrogen peroxide (0.1-35% (w/w), preferably 2-10% (w/w)), in the presence of a 2-60% (w/w), preferably 8-20% (w/w) of a catalyst (preferably Na2 WO4), and in the presence of a nonionic wetting agent. Preferably, the treatment is carried out at pH 8-11, and room temperature. The treatment time depends on the concentrations of hydrogen peroxide and catalyst, but is preferably 2 minutes or less. After the oxidative treatment, the wool is rinsed with water. For removal of residual hydrogen peroxide, and optionally for additional bleaching, the wool is further treated in acidic solutions of reducing agents (e.g., sulfites, phosphites etc.).
In some embodiments, the enzyme treatment step carried out for between about 1 minute and about 120 minutes. This step is preferably carried out at a temperature of between about 20° C. and about 60° C., more preferably between about 30° C. and about 50° C. Alternatively, the wool is soaked in or padded with an aqueous enzyme solution and then subjected to steaming at a conventional temperature and pressure, typically for about 30 seconds to about 3 minutes. In some preferred embodiments, the proteolytic enzyme treatment is carried out in an acidic or neutral or alkaline medium which may include a buffer.
In alternative embodiments, the enzyme treatment step is conducted in the presence of one or more conventional anionic, non-ionic (e.g., Dobanol; Henkel AG) or cationic surfactants. An example of a useful nonionic surfactant is Dobanol (from Henkel AG). In further embodiments, the wool or animal hair material is subjected to an ultrasound treatment, either prior to or simultaneous with the treatment with a proteolytic enzyme. In some preferred embodiments, the ultrasound treatment is carried out at a temperature of about 50° C. for about 5 minutes. In some preferred embodiments, the amount of proteolytic enzyme used in the enzyme treatment step is between about 0.2 w/w % and about 10 w/w %, based on the weight of the wool or animal hair material. In some embodiments, in order to the number of treatment steps, the enzyme treatment is carried out during dyeing and/or scouring of the wool or animal hair material, simply by adding the protease to the dyeing, rinsing and/or scouring bath. In some embodiments, enzyme treatment is carried out after the plasma treatment but in other embodiments, the two treatment steps are carried out in the opposite order.
Softeners conventionally used on wool are usually cationic softeners, either organic cationic softeners or silicone based products, but anionic or non-inoc softeners are also useful. Examples of useful softeners include, but are not limited to polyethylene softeners and silicone softeners (i.e., dimethyl polysiloxanes (silicone oils)), H-polysiloxanes, silicone elastomers, aminofunctional dimethyl polysiloxanes, aminofunctional silicone elastomers, and epoxyfunctional dimethyl polysiloxanes, and organic cationic softeners (e.g. alkyl quarternary ammonium derivatives).
In additional embodiments, the present invention provides compositions for the treatment of an animal hide that includes at least one protease of the present invention. In some embodiments, the proteases of the present invention find use in compositions for treatment of animal hide, such as those described in WO 03/00865 (Insect Biotech Co., Taejeon-Si, Korea). In additional embodiments, the present invention provides methods for processing hides and/or skins into leather comprising enzymatic treatment of the hide or skin with the protease of the present invention (See e.g., WO 96/11285). In additional embodiments, the present invention provides compositions for the treatment of an animal skin or hide into leather that includes at least one protease of the present invention.
Hides and skins are usually received in the tanneries in the form of salted or dried raw hides or skins. The processing of hides or skins into leather comprises several different process steps including the steps of soaking, unhairing and bating. These steps constitute the wet processing and are performed in the beamhouse. Enzymatic treatment utilizing the proteases of the present invention are applicable at any time during the process involved in the processing of leather. However, proteases are usually employed during the wet processing (i.e., during soaking, unhairing and/or bating). Thus, in some preferred embodiments, the enzymatic treatment with at least one of the proteases of the present invention occurs during the wet processing stage.
In some embodiments, the soaking processes of the present invention are performed under conventional soaking conditions (e.g., at a pH in the range pH 6.0-11). In some preferred embodiments, the range is pH 7.0-10.0. In alternative embodiments, the temperature is in the range of 20-30° C., while in other embodiments it is preferably in the range 24-28° C. In yet further embodiments, the reaction time is in the range 2-24 hours, while preferred range is 4-16 hours. In additional embodiments, tensides and/or preservatives are provided as desired.
The second phase of the bating step usually commences with the addition of the bate itself. In some embodiments, the enzymatic treatment takes place during batíng. In some preferred embodiments, the enzymatic treatment takes place during bating, after the deliming phase. In some embodiments, the bating process of the presents invention is performed using conventional conditions (e.g., at a pH in the range pH 6.0-9.0). In some preferred embodiments, the pH range is 6.0 to 8.5. In further embodiments, the temperature is in the range of 20-30° C., while in preferred embodiments, the temperature is in the range of 25-28° C. In some embodiments, the reaction time is in the range of 20-90 minutes, while in other embodiments, it is in the range 40-80 minutes. Processes for the manufacture of leather are well-known to those skilled in the art (See e.g., WO 94/069429 WO 90/1121189, U.S. Pat. No. 3,840,433, EP 505920, GB 2233665, and U.S. Pat. No. 3,986,926, all of which are herein incorporated by reference).
In further embodiments, the present invention provides bates comprising at least one protease of the present invention. A bate is an agent or an enzyme-containing preparation comprising the chemically active ingredients for use in beamhouse processes, in particular in the bating step of a process for the manufacture of leather. In some embodiments, the present invention provides bates comprising protease and suitable excipients. In some embodiments, agents including, but not limited to chemicals known and used in the art, e.g. diluents, emulgators, delimers and carriers. In some embodiments, the bate comprising at least one protease of the present invention is formulated as known in the art (See e.g., GB-A2250289, WO 96/11285, and EP 0784703).
In some embodiments, the bate of the present invention contains from 0.00005 to 0.01 g of active protease per g of bate, while in other embodiments, the bate contains from 0.0002 to 0.004 g of active protease per g of bate.
Thus, the proteases of the present invention find use in numerous applications and settings.
Experimental
The present invention is described in further detail in the following Examples which are not in any way intended to limit the scope of the invention as claimed. The attached Figures are meant to be considered as integral parts of the specification and description of the invention. All references cited are herein specifically incorporated by reference for all that is described therein. The following Examples are offered to illustrate, but not to limit the claimed invention
In the experimental disclosure which follows, the following abbreviations apply: PI (proteinase inhibitor), ppm (parts per million); M (molar); mM (millimolar); μM (micromolar); nM (nanomolar); mol (moles); mmol (millimoles); gmol (micromoles); nmol (nanomoles); gm (grams); mg (milligrams); μg (micrograms); pg (picograms); L (liters); ml and mL (milliliters); μl and μL (microliters); cm (centimeters); mm (millimeters); um (micrometers); nm (nanometers); U (units); V (volts); MW (molecular weight); sec (seconds); min(s) (minute/minutes); h(s) and hr(s) (hour/hours); ° C. (degrees Centigrade); QS (quantity sufficient); ND (not done); NA (not applicable); rpm (revolutions per minute); H2O (water); dH2O (deionized water); (HCl (hydrochloric acid); aa (amino acid); bp (base pair); kb (kilobase pair); kD (kilodaltons); cDNA (copy or complementary DNA); DNA (deoxyribonucleic acid); ssDNA (single stranded DNA); dsDNA (double stranded DNA); dNTP (deoxyribonucleotide triphosphate); RNA (ribonucleic acid); MgCl2 (magnesium chloride); NaCl (sodium chloride); w/v (weight to volume); v/v (volume to volume); g (gravity); OD (optical density); Dulbecco's phosphate buffered solution (DPBS); SOC (2% Bacto-Tryptone, 0.5% Bacto Yeast Extract, 10 mM NaCl, 2.5 mM KCl); Terrific Broth (TB; 12 g/l Bacto Tryptone, 24 g/l glycerol, 2.31 g/l KH2PO4, and 12.54 g/l K2HPO4); OD280 (optical density at 280 nm); OD600 (optical density at 600 nm); A405 (absorbance at 405 nm); Vmax (the maximum initial velocity of an enzyme catalyzed reaction); PAGE (polyacrylamide gel electrophoresis); PBS (phosphate buffered saline [150 mM NaCl, 10 mM sodium phosphate buffer, pH 7.2]); PBST (PBS+0.25% TWEEN® 20); PEG-(polyethylene glycol); PCR (polymerase chain reaction); RT-PCR (reverse transcription PCR); SDS (sodium dodecyl sulfate); Tris (tris(hydroxymethyl)aminomethane); HEPES (N-[2-Hydroxyethyl]piperazine-N-[2-ethanesulfonic acid]); HBS (HEPES buffered saline); Tris-HCl (tris[Hydroxymethyl]aminomethane-hydrochloride); Tricine (N-[tris-(hydroxymethyl)-methyl]-glycine); CHES (2-(N-cyclo-hexylamino)ethane-sulfonic acid); TAPS (3-1 [tris-(hydroxymethyl)-methyl]-amino)-propanesulfonic acid); CAPS (3-(cyclo-hexylamino)-propane-sulfonic acid; DMSO (dimethyl sulfoxide); DTT (1,4-dithio-DL-threitol); SA (sinapinic acid (s, 5-dimethoxy-4-hydroxy cinnamic acid); TCA (trichloroacetic acid); Glut and GSH (reduced glutathione); GSSG (oxidized glutathione); TCEP (Tris[2-carboxyethyl]phosphine); Ci (Curies); mCi (milliCuries); μCi (microCuries); HPLC (high pressure liquid chromatography); RP-HPLC (reverse phase high pressure liquid chromatography); TLC (thin layer chromatography); MALDI-TOF (matrix-assisted laser desorption/ionization—time of flight); Ts (tosyl); Bn (benzyl); Ph (phenyl); Ms (mesyl); Et (ethyl), Me (methyl); Taq (Thermus aquaticus DNA polymerase); Klenow (DNA polymerase I large (Klenow) fragment); EGTA (ethylene glycol-bis(β-aminoethyl ether) N,N,N′,N′-tetraacetic acid); EDTA (ethylenediaminetetracetic acid); bla (β-lactamase or ampicillin-resistance gene); HDL (high density liquid); MJ Research (MJ Research, Reno, Nev.); Baseclear (Baseclear BV, Inc., Leiden, the Netherlands); PerSeptive (PerSeptive Biosystems, Framingham, Mass.); ThermoFinnigan (ThermoFinnigan, San Jose, Calif.); Argo (Argo BioAnalytica, Morris Plains, N.J.); Seitz EKS (SeitzSchenk Filtersystems GmbH, Bad Kreuznach, Germany); Pall (Pall Corp., East Hills, N.Y.); EMPA Testmaterialien AG (EMPA Testmaterialien AG, St. Gallen-Winkeln, Switzerland); Warwick Equest (Warwick Equest Limited, Durham, UK); Minolta (Konica Minolta, Inc., Japan); United States Testing (United States Testing Co, Inc, Hoboken, N.J.); Spectrum (Spectrum Laboratories, Dominguez Rancho, Calif.); Molecular Structure (Molecular Structure Corp., Woodlands, Tex.); Accelrys (Accelrys, Inc., San Diego, Calif.); Chemical Computing (Chemical Computing Corp., Montreal, Canada); New Brunswick (New Brunswick Scientific, Co., Edison, N.J.); CFT (Center for Test Materials, Vlaardingen, the Netherlands); Procter & Gamble (Procter & Gamble, Inc., Cincinnati, Ohio); GE Healthcare (GE Healthcare, Chalfont St. Giles, United Kingdom); DNA2.0 (DNA2.0, Menlo Park, Calif.); OXOID (Oxoid, Basingstoke, Hampshire, UK); Megazyme (Megazyme International Ireland Ltd., Bray Business Park, Bray, Co., Wicklow, Ireland); Finnzymes (Finnzymes Oy, Espoo, Finland); Kelco (CP Kelco, Wilmington, Del.); Corning (Corning Life Sciences, Corning, N.Y.); (NEN (NEN Life Science Products, Boston, Mass.); Pharma AS (Pharma AS, Oslo, Norway); Dynal (Dynal, Oslo, Norway); Bio-Synthesis (Bio-Synthesis, Lewisville, Tex.); ATCC (American Type Culture Collection, Rockville, Md.); Gibco/BRL (Gibco/BRL, Grand Island, N.Y.); Sigma (Sigma Chemical Co., St. Louis, Mo.); Pharmacia (Pharmacia Biotech, Piscataway, N.J.); NCBI (National Center for Biotechnology Information); Applied Biosystems (Applied Biosystems, Foster City, Calif.); BD Biosciences and/or Clontech (BD Biosciences CLONTECH Laboratories, Palo Alto, Calif.); Operon Technologies (Operon Technologies, Inc., Alameda, Calif.); MWG Biotech (MWG Biotech, High Point, N.C.); Oligos Etc (Oligos Etc. Inc, Wilsonville, Oreg.); Bachem (Bachem Bioscience, Inc., King of Prussia, Pa.); Difco (Difco Laboratories, Detroit, Mich.); Mediatech (Mediatech, Herndon, Va.; Santa Cruz (Santa Cruz Biotechnology, Inc., Santa Cruz, Calif.); Oxoid (Oxoid Inc., Ogdensburg, N.Y.); Worthington (Worthington Biochemical Corp., Freehold, N.J.); GIBCO BRL or Gibco BRL (Life Technologies, Inc., Gaithersburg, Md.); Millipore (Millipore, Billerica, Mass.); Bio-Rad (Bio-Rad, Hercules, Calif.); Invitrogen (Invitrogen Corp., San Diego, Calif.); NEB (New England Biolabs, Beverly, Mass.); Sigma (Sigma Chemical Co., St. Louis, Mo.); Pierce (Pierce Biotechnology, Rockford, Ill.); Takara (Takara Bio Inc. Otsu, Japan); Roche (Hoffmann-La Roche, Basel, Switzerland); EM Science (EM Science, Gibbstown, N.J.); Qiagen (Qiagen, Inc., Valencia, Calif.); Biodesign (Biodesign Intl., Saco, Me.); Aptagen (Aptagen, Inc., Herndon, Va.); Sorvall (Sorvall brand, from Kendro Laboratory Products, Asheville, N.C.); Molecular Devices (Molecular Devices, Corp., Sunnyvale, Calif.); R&D Systems (R&D Systems, Minneapolis, Minn.); Stratagene (Stratagene Cloning Systems, La Jolla, Calif.); Marsh (Marsh Biosciences, Rochester, N.Y.); Geneart (Geneart GmbH, Regensburg, Germany); Bio-Tek (Bio-Tek Instruments, Winooski, Vt.); (Biacore (Biacore, Inc., Piscataway, N.J.); PeproTech (PeproTech, Rocky Hill, N.J.); SynPep (SynPep, Dublin, Calif.); New Objective (New Objective brand; Scientific Instrument Services, Inc., Ringoes, N.J.); Waters (Waters, Inc., Milford, Mass.); Matrix Science (Matrix Science, Boston, Mass.); Dionex (Dionex, Corp., Sunnyvale, Calif.); Monsanto (Monsanto Co., St. Louis, Mo.); Wintershall (Wintershall AG, Kassel, Germany); BASF (BASF Co., Florham Park, N.J.); Huntsman (Huntsman Petrochemical Corp., Salt Lake City, Utah); Enichem (Enichem Iberica, Barcelona, Spain); Fluka Chemie AG (Fluka Chemie AG, Buchs, Switzerland); Gist-Brocades (Gist-Brocades, Nev., Delft, the Netherlands); Dow Corning (Dow Corning Corp., Midland, Mich.); and Microsoft (Microsoft, Inc., Redmond, Wash.).
The wild-type serine protease used in the following Examples is described in detail in US04/39006 and US04/39066, both of which are herein incorporated by reference in their entirety. In addition, Example 2 of U.S. patent application Ser. No. 10/576,331 provides details for the production of 69B4 protease from the Gram-positive alkaliphilic bacterium 69B4. As indicated throughout the present application, this priority application is incorporated by reference herein in its entirety.
Example 1
Assays
In the following Examples, various assays were used, such as protein determinations, application-based tests, and stability-based tests. For ease in reading, the following assays are set forth below and referred to in the respective Examples. Any deviations from the protocols provided below in any of the experiments performed during the development of the present invention are indicated in the Examples.
Some of the detergents used in the following Examples had the following compositions. In Compositions I and II, the balance (to 100%) is perfume/dye and/or water. The pH of these compositions was from about 5 to about 7 for Composition I, and about 7.5 to about 8.5 Composition II. In Composition III, the balance (to 100%) comprised of water and/or the minors perfume, dye, brightener/SRPI/sodium carboxymethylcellulose/photobleach/MgSo4/PVPVI/suds suppressor/high molecular PEG/clay.










DETERGENT COMPOSITIONS




















Composition I
Composition II







LAS
24.0
8.0



C12-C15 AE1.8S
—
11.0



C8-C10 propyl dimethyl
2.0
2.0



amine



C12-C14 alkyl dimethyl
—
—



amine oxide



C12-C15 AS
—
7.0



CFAA
—
4.0



C12-C14 Fatty alcohol
12.0
1.0



ethoxylate



C12-C18 Fatty acid
3.0
4.0



Citric acid (anhydrous)
6.0
3.0



DETPMP
—
1.0



Monoethanolamine
5.0
5.0



Sodium hydroxide
—
1.0



1 N HCl aqueous
#1
—



solution



Propanediol
12.7
10.



Ethanol
1.8
5.4



DTPA
0.5
0.4



Pectin Lyase
—
0.005



Lipase
0.1
—



Amylase
0.001
—



Cellulase
—
0.0002



Protease A
—
—



Aldose Oxidase
—
—



DETBCHD
—
0.01



SRP1
0.5
0.3



Boric acid
2.4
2.8



Sodium xylene
—
—



sulfonate



DC 3225C
1.0
1.0



2-butyl-octanol
0.03
0.03



Brightener 1
0.12
0.08











Detergent Composition III













C14-C15AS or sodium
3.0



tallow alkyl sulfate



LAS
8.0



C12-C15AE3S
1.0



C12-C15E5 or E3
5.0



QAS
—



Zeolite A
11.0



SKS-6 (dry add)
9.0



MA/AA
2.0



AA
—



3Na Citrate 2H2O
—



Citric Acid (Anhydrous)
1.5



DTPA
—



EDDS
0.5



HEDP
0.2



PB1
—



Percarbonate
3.8



NOBS
—



NACA OBS
2.0



TAED
2.0



BB1
0.34



BB2
—



Anhydrous Na Carbonate
8.0



Sulfate
2.0



Silicate
—



Protease B
—



Protease C
—



Lipase
—



Amylase
—



Cellulase
—



Pectin Lyase
0.001



Aldose Oxidase
0.05



PAAC
—










A. TCA Assay for Protein Content Determination in 96-Well Microtiter Plates

This assay was started using filtered culture supernatant from microtiter plates grown 4 days, at 33° C. with shaking at 230 RPM and humidified aeration. A fresh 96-well flat bottom plate was used for the assay. First, 100 μL/well of 0.25 N HCl were placed in the wells. Then, 50 μL filtered culture broth were added to the wells. The light scattering/absorbance at 405 nm (use 5 sec mixing mode in the plate reader) was then determined, in order to provide the “blank” reading.
For the test, 100 μL/well 15% (w/v) TCA was placed in the plates and incubated between 5 and 30 min at room temperature. The light scattering/absorbance at, 405 nm (use 5 sec mixing mode in the plate reader) was then determined.
The calculations were performed by subtracting the blank (i.e., no TCA) from the test reading with TCA. If desired, a standard curve can be created by calibrating the TCA readings with AAPF assays of clones with known conversion factors. However, the TCA results are linear with respect to protein concentration from 50 to 500 ppm and can thus be plotted directly against enzyme performance for the purpose of choosing good-performing variants.
B. suc-AAPF-pNA Assay of Proteases in 96-Well Microtiter Plates
In this assay system, the reagent solutions used were:
1. 100 mM Tris/HCl, pH 8.6, containing 0.005% TWEEN®-80 (Tris buffer)
2. 100 mM Tris buffer, pH 8.6, containing 10 mM CaCl2 and 0.005% TWEEN®-80 (Tris buffer)
3. 160 mM suc-AAPF-pNA in DMSO (suc-AAPF-pNA stock solution) (Sigma: S-7388)
To prepare suc-AAPF-pNA working solution, 1 ml AAPF stock was added to 100 ml Tris buffer and mixed well for at least 10 seconds.
The assay was performed by adding 10 g of diluted protease solution to each well, followed by the addition (quickly) of 190 μl 1 mg/ml AAPF-working solution. The solutions were mixed for 5 sec., and the absorbance change was read at 410 nm in an MTP reader, at 25° C. The protease activity was expressed as AU (activity=ΔOD·min−1·ml−1).
C. Keratin Hydrolysis Assay
In this assay system, the chemical and reagent solutions used were:
















Keratin
ICN 902111



Detergent
1.6 g. detergent was dissolved




in 1000 ml water (pH = 8.2)




0.6 ml. CaCl2/MgCl2 of 10,000 gpg




was also added, as well as 1190 mg HEPES,




giving a hardness and buffer strength of




6 gpg and 5 mM respectively. The pH




was adjusted to 8.2 with NaOH.



Picrylsulfonic
Sigma P-2297 (5% solution in water)



acid (TNBS)



Reagent A
45.4 g Na2B4O7•10 H2O (Merck 6308)




and 15 ml of 4N NaOH were dissolved




together to a final volume of




1000 ml (by heating if needed)



Reagent B
35.2 g NaH2PO4•1H2O (Merck 6346)




and 0.6 g Na2SO3 (Merck 6657) were




dissolved together to a final volume of 1000 ml.










Method:

Prior to the incubations, keratin was sieved on a 100 μm sieve in small portions at a time. Then, 10 g of the <100 μm keratin was stirred in detergent solution for at least 20 minutes at room temperature with regular adjustment of the pH to 8.2. Finally, the suspension was centrifuged for 20 minutes at room temperature (Sorvall, GSA rotor, 13,000 rpm). This procedure was then repeated. Finally, the wet sediment was suspended in detergent to a total volume of 200 ml., and the suspension was kept stirred during pipetting. Prior to incubation, microtiter plates (MTPs) were filled with 200 μl substrate per well with a Biohit multichannel pipette and 1200 μl tip (6 dispenses of 200 μl and dispensed as fast as possible to avoid settling of keratin in the tips). Then, 10 μl of the filtered culture was added to the substrate containing MTPs. The plates were covered with tape, placed in an incubator and incubated at 20° C. for 3 hours at 350 rpm (Innova 4330 [New Brunswick]). Following incubation, the plates were centrifuged for 3 minutes at 3000 rpm (iSigma 6K 15 centrifuge). About 15 minutes before removal of the 1st plate from the incubator, the TNBS reagent was prepared by mixing 1 ml TNBS solution per 50 ml of reagent A.
MTPs were filled with 60 μl TNBS reagent A per well. From the incubated plates, 10 μl was transferred to the MTPs with TNBS reagent A. The plates were covered with tape and shaken for 20 minutes in a bench shaker (BMG Thermostar) at room temperature and 500 rpm. Finally, 200 μl of reagent B was added to the wells, mixed for 1 minute on a shaker, and the absorbance at 405 nm was measured with the MTP-reader.
Calculation of the Keratin Hydrolyzing Activity:
The obtained absorbance value was corrected for the blank value (substrate without enzyme). The resulting absorbance provides a measure for the hydrolytic activity. For each sample (variant) the performance index was calculated. The performance index compares the performance of the variant (actual value) and the standard enzyme (theoretical value) at the same protein concentration. In addition, the theoretical values can be calculated, using the parameters of the Langmuir equation of the standard enzyme. A performance index (PI) that is greater than 1 (PI>1) identifies a better variant (as compared to the standard [e.g., wild-type]), while a PI of 1 (PI=1) identifies a variant that performs the same as the standard, and a PI that is less than 1 (PI<1) identifies a variant that performs worse than the standard. Thus, the PI identifies winners, as well as variants that are less desirable for use under certain circumstances.
D. Microswatch Assay for Testing Protease Performance
All of the detergents used in these assays did not contain enzymes.
Detergent Preparations:
1. Cold Water Liquid Detergent (US Conditions):

    Milli-Q water was adjusted to 6 gpg water hardness (Ca/Mg=3/1), 1.60 g/l detergent was added, and the detergent solution was stirred vigorously for at least 15 minutes. Then, 5 mM Hepes buffer was added and the pH adjusted to 8.2. The detergent was filtered before use in the assay through a 0.22 μm filter (e.g. Nalgene top bottle filter).


2. Low pH Liquid Detergent (US Conditions):
Milli-Q water was adjusted to 6 gpg water hardness (Ca/Mg=3/1), 1.60 g/l detergent TIDE®-LVJ-1 or TIDE® 2005) or 1.50 g/l detergent (TIDE®-SNOW) was added, and the detergent solution stirred vigorously for at least 15 minutes. The pH was adjusted to 6.0 using 1N NaOH.solution. The detergent was filtered before use in the assay through a 0.22 μm filter (e.g. Nalgene top bottle filter).
Microswatches:
Microswatches of 1⁄4′′ circular diameter were ordered and delivered by CFT Vlaardingen. The microswatches were pretreated using the fixation method described below. Single microswatches were placed in each well of a 96-well microtiter plate vertically to expose the whole surface area (i.e., not flat on the bottom of the well).
“3K” Swatch Fixation:
This particular swatch fixation was done at room temperature. However the amount of 30% H2O2 added is 10× more than in the superfixed swatch fixation method i.e., conducted at 60° C., used with European conditions). Bubble formation (frothing) will be visible and therefore it is necessary to use a bigger beaker to account for this. First, 8 liters of distilled water were placed in a 10 L beaker, and 80 ml of 30% hydrogen peroxide added. The water and peroxide were mixed well with a ladle. Then, 40 pieces of EMPA 116 swatches were spread into a fan before adding into the solution to ensure uniform fixation. The swatches were swirled in the solution (using the ladle) for 30 minutes, continuously for the first five minutes and occasionally for the remaining 25 minutes. The solution was discarded and the swatches were rinsed 6 times with approximately 6 liters of distilled water each time. The swatches were placed on top of paper towels to dry. The air-dried swatches were punched using a 1⁄4′′ circular die on an expulsion press. A single microswatch was placed vertically into each well of a 96-well microtiter plate to expose the whole surface area (i.e., not flat on the bottom of the well).
Enzyme Samples:
The enzyme samples were tested at appropriate concentrations for the respective geography, and diluted in 10 mM NaCl, 0.005% TWEEN®-80 solution.
Test Method:
The incubator was set at the desired temperature: 20° C. for cold water liquid conditions or 30° C. for low-pH liquid conditions. The pretreated and precut swatches were placed into the wells of a 96-well MTP, as described above. The enzyme samples were diluted, if needed, in 10 mM NaCl, 0.005% TWEEN®-80 to 20× the desired concentration. The desired detergent solutions were prepared as described above. Then, 190 μl of detergent solution were added to each well of the MTP. To this mixture, 10 μl of enzyme solution were added to each well (to provide a total volume to 200 μl/well). The MTP was sealed with a plate sealer and placed in an incubator for 60 minutes, with agitation at 350 rpm. Following incubation under the appropriate conditions, 100 gi of solution from each well were removed and placed into a fresh MTP. The new MTP containing 100 μl of solution/well was read at 405 nm in a MTP reader. Blank controls, as well as a control containing a microswatch and detergent but no enzyme were also included. The stock solution was used at a concentration of 15,000 gpg (Ca/Mg 3:1 (1.92 M Ca2+=282.3 g/L CaCl2.2H2O; 0.64 M Mg2+=30.1 g/L MgCl2.6H2O).







TABLE 1-1







Detergent Composition and Incubation Conditions in the μSwatch Assay.

















Enzyme





Reference

Water
Dosage
Temp.


Detergent
Enzyme
Detergent
Hardness
[ppm]
(° C.)
Swatch





Cold Water
ASP
1.5 or 1.6 g/l
6 gpg - Ca/Mg:3/1
0.3-4
20°
3K


Liquid

Detergent


Low pH
ASP
1.6 g/l
6 gpg -
0.5-4
30°
3K


Liquid

Detergent
Ca/Mg:3/1


Detergent









Calculation of the BMI Performance:

The obtained absorbance value was corrected for the blank value (obtained after incubation of microswatches in the absence of enzyme). The resulting absorbance was a measure for the hydrolytic activity. For each sample (variant) the performance index was calculated. The performance index compares the performance of the variant (actual value) and the standard enzyme (theoretical value) at the same protein concentration. In addition, the theoretical values can be calculated, using the parameters of the Langmuir equation of the standard enzyme. A performance index (PI) that is greater than 1 (PI>1) identifies a better variant (as compared to the standard [e.g., wild-type]), while a PI of 1 (PI=1) identifies a variant that performs the same as the standard, and a PI that is less than 1 (PI<1) identifies a variant that performs worse than the standard.
Thus, the PI identifies winners, as well as variants that are less desirable for use under certain circumstances.
D. Dimethylcasein Hydrolysis Assay (96 Wells)
In this assay system, the chemical and reagent solutions used were:

    Dimethylcasein (DMC):Sigma C-9801
    TWEEN®-80: Sigma P-8074
    PIPES buffer (free acid): Sigma P-1851; 15.1 g is dissolved in about 960 ml water; pH is adjusted: to 7.0 with 4N NaOH, 1 ml 5% TWEEN®-80 is added and the volume brought up to 1000 ml. The final concentration of PIPES and TWEEN®-80 is 50 mM and 0.005% respectively.
    Picrylsulfonic acid (TNBS): Sigma P-2297 (5% solution in water)
    Reagent A: 45.4 g Na2B4O7.10H2O (Merck 6308) and 15 ml of 4N NaOH are dissolved together to a final volume of 1000 ml (by heating if needed)
    Reagent B: 35.2 g NaH2PO4.1H2O (Merck 6346) and 0.6 g Na2SO3 (Merck 6657) are dissolved together to a final volume of 1000 ml.

Method:



To prepare the substrate, 4 g DMC were dissolved in 400 ml PIPES buffer. The filtered culture supernatants were diluted with PIPES buffer; the final concentration of the controls in the growth plate was 20 ppm. Then, 10 μl of each diluted supernatant were added to 200 μl substrate in the wells of a MTP. The MTP plate was covered with tape, shaken for a few seconds and placed in an oven at 37° C. for 2 hours without agitation.
About 15 minutes before removal of the 15′ plate from the oven, the TNBS reagent was prepared by mixing 1 ml TNBS solution per 50 ml of reagent A. MTPs were filled with 60 μl TNBS reagent A per well. The incubated plates were shaken for a few seconds, after which 10 μl were transferred to the MTPs with TNBS reagent A. The plates were covered with tape and shaken for 20 minutes in a bench shaker (BMG Thermostar) at room temperature and 500 rpm. Finally, 200 μl reagent B were added to the wells, mixed for 1 minute on a shaker, and the absorbance at 405 nm was determined using an MTP-reader.
Calculation of Dimethylcasein Hydrolyzing Activity:
The obtained absorbance value was corrected for the blank value (substrate without enzyme). The resulting absorbance is a measure for the hydrolytic activity. The (arbitrary) specific activity of a sample was calculated by dividing the absorbance and the determined protein concentration.
E. Thermostability Assay
This assay is based on the dimethylcasein hydrolysis, before and after heating of the buffered culture supernatant. The same chemical and reagent solutions were used as described in the dimethylcasein hydrolysis assay.
Method:
The filtered culture supernatants were diluted to 20 ppm in PIPES buffer (based on the concentration of the controls in the growth plates). First, 10 ul of each diluted enzyme sample was taken to determine the initial activity in the dimethylcasein assay and treated as described below. Then, 50 μl of each diluted supernatant were placed in the empty wells of a MTP. The MTP plate was incubated in an iEMS incubator/shaker HT (Thermo Labsystems) for 90 minutes at 60° C. and 400 rpm. The plates were cooled on ice for 5 minutes. Then, 10 μl of the solution was added to a fresh MTP containing 200 μl dimethylcasein substrate/well to determine the final activity after incubation. This MTP was covered with tape, shaken for a few seconds and placed in an oven at 37° C. for 2 hours without agitation. The same detection method as used for the DMC hydrolysis assay was used.
Calculation of Thermostability:
The residual activity of a sample was expressed as the ratio of the final absorbance and the initial absorbance, both corrected for blanks.
F. LAS Stability Assay
LAS stability was measured after incubation of the test protease in the presence of 0.06% LAS (dodecylbenzenesulfonate sodium), and the residual activity was determined using the AAPF assay.
Reagents:


    
    
        Dodecylbenzenesulfonate, Sodium salt (=LAS): Sigma D-2525
        TWEEN®-80: Sigma P-8074
        TRIS buffer (free acid): Sigma T-1378); 6.35 g is dissolved in about 960 ml water; pH is adjusted to 8.2 with 4N HCl. Final concentration of TRIS is 52.5 mM.
        LAS stock solution: Prepare a 10.5% LAS solution in MQ water (=10.5 g per 100 ml MQ)
        TRIS buffer-100 mM/pH 8.6 (100 mM Tris/0.005% Tween80)
        TRIS-Ca buffer, pH 8.6 (100 mM Tris/10 mM CaCl2/0.005% Tween80)

Hardware:

        Flat bottom MTPs: Costar (#9017)
        Biomek FX
        ASYS Multipipettor
        Spectramax MTP Reader
        IEMS Incubator/Shaker
        Innova 4330 Incubator/Shaker
        Biohit multichannel pipette
        BMG Thermostar Shaker

Method:

    
    


A 0.063% LAS solution was prepared in 52.5 mM Tris buffer pH 8.2. The AAPF working solution was prepared by adding 1 ml of 100 mg/ml AAPF stock solution (in DMSO) to 100 ml (100 mM) TRIS buffer, pH 8.6. To dilute the supernatants, flat-bottomed plates were filled with dilution buffer and an aliquot of the supernatant was added and mixed well. The dilution ratio depended on the concentration of the ASP-controls in the growth plates (AAPF activity). The desired protein concentration was 80 ppm.
Ten μl of the diluted supernatant were added to 190 μl 0.063% LAS buffer/well. The MTP was covered with tape, shaken for a few seconds and placed in an incubator (Innova 4230) at 25° or 35° C., for 60 minutes at 200 rpm agitation. The initial activity (t=10 minutes) was determined after 10 minutes of incubation by transferring 10 μl of the mixture in each well to a fresh MTP containing 190 μl AAPF work solution. These solutions were mixed well and the AAPF activity was measured using a MTP Reader (20 readings in 5 minutes and 25° C.).
The final activity (t=60 minutes) was determined by removing another 10 μl of solution from the incubating plate after 60 minutes of incubation. The AAPF activity was then determined as described above. The calculations were performed as follows: the % Residual Activity was [t−60 value]*100/[t−10 value].
Example 2
ASP Protease Production in B. subtilis 
In this Example, experiments conducted to produce 69B4 protease (also referred to herein as “ASP,” “Asp,” and “ASP protease,” and “Asp protease”) in B. subtilis are described. In this Example, the transformation of plasmid pHPLT-ASP-C1-2 (See, FIG. 1) into B. subtilis is described. Transformation was performed as known in the art (See e.g., WO 02/14490, incorporated herein by reference). To optimize ASP expression in B. subtilis, a synthetic DNA sequence was produced by DNA2.0, and utilized in these expression experiments. The DNA sequence (synthetic ASP DNA sequence) provided below, with codon usage adapted for Bacillus species, encodes the wild type ASP precursor protein:









ATGACACCACGAACTGTCACAAGAGCTCTGGCTGTGGCAACAGCAGCTGCTACACTCTTGGC
(SEQ ID NO: 10)



 


TGGGGGTATGGCAGCACAAGCTAACGAACCGGCTCCTCCAGGATCTGCATCAGCCCCTCCAC



 


GATTAGCTGAAAAACTTGACCCTGACTTACTTGAAGCAATGGAACGCGATCTGGGGTTAGAT



 


GCAGAGGAAGCAGCTGCAACGTTAGCTTTTCAGCATGACGCAGCTGAAACGGGAGAGGCTC



 


TTGCTGAGGAACTCGACGAAGATTTCGCGGGCACGTGGGTTGAAGATGATGTGCTGTATGTT



 


GCAACCACTGATGAAGATGCTGTTGAAGAAGTCGAAGGCGAAGGAGCAACTGCTGTGACTG



 


TTGAGCATTCTCTTGCTGATTTAGAGGCGTGGAAGACGGTTTTGGATGCTGCGCTGGAGGGT



 


CATGATGATGTGCCTACGTGGTACGTCGACGTGCCTACGAATTCGGTAGTCGTTGCTGTAAA



 


GGCAGGAGCGCAGGATGTAGCTGCAGGACTTGTGGAAGGCGCTGATGTGCCATCAGATGCG



 


GTCACTTTTGTAGAAACGGACGAAACGCCTAGAACGATGTTCGACGTAATTGGAGGCAAC



 


GCATATACTATTGGCGGCCGGTCTAGATGTTCTATCGGATTCGCAGTAAACGGTGGCT



 


TCATTACTGCCGGTCACTGCGGAAGAACAGGAGCCACTACTGCCAATCCGACTGGCAC



 


ATTTGCAGGTAGCTCGTTTCCGGGAAATGATTATGCATTCGTCCGAACAGGGGCAGGA



 


GTAAATTTGCTTGCCCAAGTCAATAACTACTCGGGCGGCAGAGTCCAAGTAGCAGGAC



 


ATACGGCCGCACCAGTTGGATCTGCTGTATGCCGCTCAGGTAGCACTACAGGTTGGCA



 


TTGCGGAACTATCACGGCGCTGAATTCGTCTGTCACGTATCCAGAGGGAACAGTCCGA



 


GGACTTATCCGCACGACGGTTTGTGCCGAACCAGGTGATAGCGGAGGTAGCCTTTTAG



 


CGGGAAATCAAGCCCAAGGTGTCACGTCAGGTGGTTCTGGAAATTGTCGGACGGGGG



 


GAACAACATTCTTTCAACCAGTCAACCCGATTTTGCAGGCTTACGGCCTGAGAATGATT



 


ACGACTGACTCTGGAAGTTCCCCTGCTCCAGCACCTACATCATGTACAGGCTACGCAAGA



 


ACGTTCACAGGAACCCTCGCAGCAGGAAGAGCAGCAGCTCAACCGAACGGTAGCTATGTTC



 


AGGTCAACCGGAGCGGTACACATTCCGTCTGTCTCAATGGACCTAGCGGTGCGGACTTTGAT



 


TTGTATGTGCAGCGATGGAATGGCAGTAGCTGGGTAACCGTCGCTCAATCGACATCGCCGGG



 


AAGCAATGAAACCATTACGTACCGCGGAAATGCTGGATATTATCGCTACGTGGTTAACGCTG



 


CGTCAGGATCAGGAGCTTACACAATGGGACTCACCCTCCCCTGA







In the above sequence, bold indicates the DNA that encodes the mature protease, standard font indicates the leader sequence, and the underline indicates the N-terminal and C-terminal prosequences.
Expression of the Synthetic ASP Gene
Asp expression cassettes were constructed in the pXX-KpnI (See, FIG. 2) vector and subsequently cloned into the pHPLT vector (See, FIG. 3) for expression of ASP in B. subtilis. pXX-KpnI is a pUC based vector with the aprE promoter (B. subtilis) driving expression, a cat gene, and a duplicate aprE promoter for amplification of the copy number in B. subtilis. The bla gene allows selective growth in E. coli. The KpnI, introduced in the ribosomal binding site, downstream of the aprE promoter region, together with the HindIII site enables cloning of Asp expression cassettes in pXX-KpnI. pHPLT-EBS2c2, a derivative of pHPLT (Solingen et al., Extremophiles 5:333-341 [2001]), contains the thermostable amylase LAT promoter (PLAT) of Bacillus licheniformis, followed by XbaI and HpaI restriction sites for cloning ASP expression constructs.
The Asp expression cassette was cloned in the pXX-KpnI vector containing DNA encoding a hybrid signal peptide constructed of 5 subtilisin AprE N-terminal signal peptide amino acids fused to the Asp C-terminal signal peptide amino acids (MRSKKRTVTRALAVATAAATLLAGGMAAQA; SEQ ID NO:11). The Asp expression cassette cloned in the pXX-KpnI vector was transformed into E. coli (Electromax DH10B, Invitrogen, Cat. No. 12033-015). The primers and cloning strategy used are provided in Table 2-1. Subsequently, the expression cassettes were cloned from these vectors and introduced in the pHPLT expression vector for transformation into a B. subtilis (ΔaprE, ΔnprE, oppA, ΔspoIIE, degUHy32, ΔamyE::(xylR, pxylA-comK) strain. The primers and cloning strategy for ASP expression cassettes cloning in pHPLT are provided in Table 2-2. Transformation into B. subtilis was performed as described in WO 02/14490, incorporated herein by reference.







TABLE 2-1







ASP in pXX-KpnI and p2JM103-DNNDPI




















Restriction





ASP C-



Sites Used


Vector
Signal
Terminal

DNA
Host
for


Construct
Peptide
prosequence
Primers
Template
Vector
Cloning





pXX-
MRSK
Not
ASP-PreCross-I-FW
ASP
pXX-
KpnI and



ASP-4
KRTVT
incorporated
TCATGCAGGGTACCATG
synthetic
KpnI
HindIII



RALA

AGAAGCAAGAAGCGAA
DNA



VATA

CTGTCACAAGAGCTCTG
sequence



AATLL

GCT (SEQ ID NO:12)



AGGM



AAQA

ASP-syntc-mature-RV



(SEQ

GTGTGCAAGCTTTCAAG



ID

GGGAACTTCCAGAGTCA



NO:11)

GTC (SEQ ID NO:13)
















TABLE 2-2







ASP Expression Cassettes in pHPLT















Restriction


Vector

DNA

Sites Used


Construct
Primers
Template
Host Vector
for Cloning





pHPLT-ASP-
ASP-Cross-1 & 2-FW
pXX-ASP-4
PHPLT-
NheI x SmaI


C1-2
TGAGCTGCTAGCAAAAGGAGAGGG

EBS2c2 (XbaI x




TAAAGAATGAGAAGCAAGAAG

HpaI)




(SEQ ID NO: 14)





 



pHPLT-ASPmat-RV






CATGCATCCCGGGTTAAGGGGAAC






TTCCAGAGTCAGTC






(SEQ ID NO: 15)









Primers were obtained from MWG and Invitrogen. Invitrogen Platinum Taq DNA polymerase High Fidelity (Cat. No. 11304-029) was used for PCR amplification (0.2 μM primers, 25 up to 30 cycles) according to the Invitrogen's protocol. Ligase reactions of ASP expression cassettes and host vectors were completed by using Invitrogen T4 DNA Ligase (Cat. No. 15224-025), utilizing Invitrogen's protocol as recommended for general cloning of cohesive ends).
Expression of the asp gene was investigated in a B. subtilis strain (ΔaprE, ΔnprE, oppA, ΔspoIIE, degUHy32, ΔamyE::(xylR, pxylA-comK.) The plasmid pHPLT-ASP-C1-2 (See, Table 2-2, and FIG. 1), was transformed into B. subtilis (ΔaprE, ΔnprE, oppA, ΔspoIIE, degUHy32, ΔamyE::(xylR, pxylA-comK). Transformation was performed as known in the art (See e.g., WO 02/14490, incorporated herein by reference).
Selective growth of B. subtilis (ΔaprE, ΔnprE, oppA, ΔspoIIE, degUHy32, ΔamyE::(xylR, pxylA-comK) transformants harboring the pBPLT-ASP-C1-2 vector was performed in shake flasks containing 25 ml Synthetic Maxatase Medium (SMM), with 0.97 g/l CaCl2.6H2O instead of 0.5 g/l CaCl2 (See, U.S. Pat. No. 5,324,653, herein incorporated by reference) with 20 mg/L neomycin. This growth resulted in the production of secreted ASP protease with proteolytic activity. Gel analysis was performed using NuPage Novex 10% Bis-Tris gels (Invitrogen, Cat. No. NP0301 BOX). To prepare samples for analysis, 2 volumes of supernatant were mixed with 1 volume 1M HCl, 1 volume 4×LDS sample buffer (Invitrogen, Cat. No. NP0007), and 1% PMSF (20 mg/ml) and subsequently heated for 10 minutes at 70° C. Then, 25 μL of each sample was loaded onto the gel, together with 10 μL of SeeBlue plus 2 pre-stained protein standards (Invitrogen, Cat. No. LC5925). The results clearly demonstrated that the asp cloning strategy described in this Example yield active Asp produced by B. subtilis. 
In addition, samples of the same fermentation broths were assayed as follows: 101 of the diluted supernataent was taken and added to 190 μl AAPF substrate solution (conc. 1 mg/ml, in 0.1 M Tris/0.005% TWEEN®, pH 8.6). The rate of increase in absorbance at 410 nm due to release of p-nitroaniline was monitored (25° C.), as it provides a measure of the ASP concentration produced. These results indicated that the B. subtilis pHPLT-ASP-C1-2 transformants resulted in the production of measurable ASP protease.
Example 3
Construction of Combinatorial Mutants
In this Example, the construction of a multiple mutation library of a ASP variant is described. The ASP variant that served as the backbone for the multiple mutation library contains the substitutions R014I-A064K-T086K-T116E-R123F. This variant was cloned in the pHPLT vector. The QuikChange® multi site-directed mutagenesis (QCMS) kit (Stratagene) was used to construct the library. The 5′ phosphorylated primers used to create the library are shown in Table 3-1. It was noted that HPLC, PAGE or any other type of purified primers gave far better results in terms of incorporation of full length primers as well as significant reduction in primer-containing errors. However, in these experiments, purified primers were not used.







TABLE 3-1







Primers and Sequences








Primer name
Primer sequences












ASP-N24E-FW
TATCGGATTCGCAGTAGAGGGTGGCTTCATTA




CTGCCGG



(SEQ ID NO: 16)


 


ASP-N24A-FW
TATCGGATTCGCAGTAGCCGGTGGCTTCATTA



CTGCCGG



(SEQ ID NO: 17)


 


ASP-N24T-FW
TATCGGATTCGCAGTAACAGGTGGCTTCATTA



CTGCCGG



(SEQ ID NO: 18)


 


ASP-N24Q-FW
TATCGGATTCGCAGTACAAGGTGGCTTCATTA



CTGCCGG



(SEQ ID NO: 19)


 


ASP-R35E-FW
CGGTCACTGCGGAGAGACAGGAGCCACTACTG



CC



(SEQ ID NO:20)


 


ASP-R35D-FW
CGGTCACTGCGGAGACACAGGAGCCACTACTG



CC



(SEQ ID NO:21)


 


ASP-G54D-FW
AGGTAGCTCGTTTCCGGACAATGATTATGCAT



TCGTCCG



(SEQ ID NO:21)


 


ASP-A64K-N67L-FW
CCGAACAGGGAAAGGAGTACTGTTGCTTGCCC



AAGTCAATAAC



(SEQ ID NO:22)


 


ASP-A64K-N67S-FW
CCGAACAGGGAAAGGAGTATCTTTGCTTGCCC



AAGTCAATAAC



(SEQ ID NO:23)


 


ASP-A64K-N67A-FW
CCGAACAGGGAAAGGAGTAGCTTTGCTTGCCC



AAGTCAATAAC



(SEQ ID NO:24)


 


ASP-G78D-T86K-FW
TAACTACTCGGGCGACAGAGTCCAAGTAGCAG



GACATAAAGCC



(SEQ ID NO:25)


 


ASP-R123F-R127Q-FW
GTCTTTGGACTTATCCAAACGACGGTTTGTGC



CGAACC



(SEQ ID NO:26)


 


ASP-R123F-R127K-FW
GTCTTTGGACTTATCAAAACGACGGTTTGTGC



CGAACCAG



(SEQ ID NO:27)


 


ASP-R123F-R127Y-FW
GTCCGAGGACTTATCTACACGACGGTTTGTGC



CGAACC



(SEQ ID NO:28)


 


K159F-FW
GGTGGTTCTGGAAATTGTTTCACGGGGGGAAC



AACATTC



(SEQ ID NO:29)


 


K159E-FW
GGTGGTTCTGGAAATTGTGAGACGGGGGGAAC



AACATTC



(SEQ ID NO: 30)


 


K159N-FW
GGTGGTTCTGGAAATTGTAACACGGGGGGAAC



AACATTC



(SEQ ID NO:31)


 


R159K-FW
GGTGGTTCTGGAAATTGTAAGACGGGGGGAAC



AACATTC



(SEQ ID NO:32)









pUC18-ASP Preparation

The ASP variant containing the substitutions R014I-A064K-T086K-T116E-R123F was cloned from the pHPLT vector into the pUC18 vector (Invitrogen, cat. no 15363013; See, FIG. 1), using the PstI and HindIII restriction sites. Subsequently, the pUC18-ASP plasmid (See, FIG. 2) was electroporated to electrocompetent E. coli cells (Invitrogen, cat. no C4040-52, One Shot® TOP10 ElectrocompTM E. coli, dam+) and selective growth on agar plates containing 100 mg/L ampicillin, resulted in pUC18-ASP plasmid harboring E. coli cells. This method was used to ensure methylated ASP DNA at GATC sites, needed to perform the QCMS protocol, because the plasmid pHPLT-ASP-C1-2 does not grown in E. coli. 
Miniprep DNA was prepared from E. coli cells harboring the pUC18-ASP plasmid. Specifically, the strain was grown overnight in 10 mL of 2×TY medium with 100 ppm of ampicillin, after which the cells were spun down. The Qiagen spin miniprep DNA kit (cat. No. 27106) was used for preparing the plasmid DNA by the steps outlined in the Qiagen miniprep kit manual. The miniprep DNA was eluted with 50 uL of Qiagen buffer EB provided in the kit.
Multiple Mutation Library Construction
Sites to be used for multiple mutation library construction were chosen as follows. For each property required in the final molecule, mutations were evaluated as “Up” or “Down,” with sites defined as productive. At a minimum, sites to be combined should be productive for each property desired, and at a minimum, for the most important property. To ensure that the libraries had the highest probability for improving or maintaining all important properties, the following criteria were used.
For each property, a cut-off value for ΔΔ G was established. For example, for a process taking place at 25° C. ΔΔ G values <0.06 Kcal represent those mutations no worse than 90% of the parent proteins activity, while ΔΔ G values>1.13 Kcal represent those mutations that are 125% of the parent proteins activity.
The multiple mutation library was constructed as outlined in the Stratagene QCMS kit, with the exception of the primer concentration used in the reactions. Specifically, 1 μL of the methylated, purified pUC18-ASP plasmid (about 70 ng) was mixed with 15 μL of sterile distilled water, 1.5 μL of dNTP, 2.5 μL of 10× buffer, 1 μL of the enzyme blend and 1.0 μL mutant primer mix (for a total of 100 pmol of primers). The primer mix was prepared using 10 μL of each of the eighteen mutant primers (100 pmol/μL); adding 50 ng of each primer for the library as recommended by Stratagene, resulted in fewer mutations in a previous round of mutagenesis. Thus, the protocol was modified in the present round of mutagenesis to include a total of 100 pmol of primers in each reaction. The cycling conditions were 95° C. for 1 min, followed by 30 cycles of 95° C. for 1 min, 55° C. for 1 min, and 65° C. for 12 min, in an MJ Research PTC-200 thermocycler using thin-walled 0.2 mL PCR tubes. The reaction product was digested with 1 μL of DpnI from the QCMS kit by incubating at 37° C. overnight. An additional 0.5 μL of DpnI was added, and the reaction was incubated for 1 hour.
Subsequently, the library DNA (mutagenized single stranded pUC18-ASP product) was electroporated to electrocompetent E. coli cells (Invitrogen, cat. no C4040-52, One Shot® TOP10 ElectrocompTM E. coli, dam+) and selective growth on agar plates containing 100 mg/L ampicillin resulted in the ASP multiple mutation library in E. coli cells. Colonies (tens of thousands) were harvested and the Qiagen spin miniprep DNA kit (cat. No. 27106) was used for preparing the plasmid DNA by the steps outlined in the Qiagen miniprep kit manual. The miniprep DNA was eluted with 50 uL of Qiagen buffer EB provided in the kit.
Miniprep DNA was digested using the PstI and HindIII DNA restriction enzymes. The ASP library fragment mix (PstI×HindIII) was gel purified and cloned in the 4154 basepair HindIII×PstI pHPLT vector fragment by a ligase reaction using Invitrogen T4 DNA Ligase (Cat. No. 15224-025), utilizing Invitrogen's protocol as recommended for general cloning of cohesive ends). In another approach, synthetic ASP library fragments were produced by GeneArt. These ASP library fragments were also digested with PstI and HindIII, purified and cloned in the 4154 basepair HindIII×PstI pHPLT vector fragment by a ligase reaction.
To transform the ligation reaction mix directly into Bacillus cells, the library DNA (ASP library fragment mix cloned in pHPLT) was amplified using the TempliPhi kit (Amersham cat. #25-6400). For this purpose, 1 μL of the ligation reaction mix was mixed with 5 μL of sample buffer from the TempliPhi kit and heated for 3 minutes at 95° C. to denature the DNA. The reaction was placed on ice to cool for 2 minutes and then spun down briefly. Next, 5 μL of reaction buffer and 0.2 μL of phi29 polymerase from the TempliPhi kit were added, and the reactions were incubated at 30° C. in an MJ Research PCR machine for 4 hours. The phi29 enzyme was heat inactivated in the reactions by incubation at 65° C. for 10 min in the PCR machine.
For transformation of the libraries into Bacillus, 0.1 μL of the TempliPhi amplification reaction product was mixed with 500 μL of competent B. subtilis cells (ΔaprE, ΔnprE, oppA, ΔspoIIE, degUHy32, ΔamyE::(xylR, pxylA-comK) followed by vigorous shaking at 37° C. for 1 hour and 100 and 500 μL was plated on HI-agar plates containing 20 ppm neomycin sulfate (Sigma, Cat. No. N-1876; contains 732 μg neomycin per mg) and 0.5% skim milk. Ninety-five clones from the library were picked for sequencing.
The mutagenesis worked well, in that only 14% of the clones were equal to the backbone sequence (ASP with R014I-A064K-T086K-T116E-R123F), about 3% of clones had extra mutations. The remaining of the sequenced clones (72%) were all mutants, and of these about 94% were unique mutants. The sequencing results for the library are provided below in Table 3-3.







TABLE 3-3





Variants of ASP with R014I-A064K-T086K-T116E-R123F





















G54D








N24A


N24Q


N24T


N67S


R127K


R159F


R159K


R159K


R159N


R159N


G78D
R159F


N24Q
R35E


N67S
R159E


R127K
R159E


R127K
R159K


R127K
R159N


R127Q
R159K


R35D
R159E


R35D
R159K


R35E
R159K


G54D
R127K
R159K


G78D
R127K
R159K


G78D
R127K
R159E


G78D
R127Q
R159K


N24A
N67A
R159K


N24A
N67S
R159K


N24E
R35D
G78D


N24T
N67S
R159E


N67L
G78D
R159K


R35D
G78D
R159K


N24A
R35E
G78D
R159N


N24D
R35D
G78D
R159F


N24E
G54D
G78D
R159K


N24E
R35D
G78D
R127K
R159N


N24Q
G54D
G78D
R159N


N24Q
N67L
G78D
R159E


N24Q
R35D
R127K
R159K


N24T
R35D
G78D
R159K


N24T
R35D
G78D
R159K


N67S
G78D
R127K
R159K


R35D
G78D
R127K
R159E


R35D
G78D
R127K
R159N


R35D
G78D
R127Q
R159K


R35E
G54D
N67A
R159F


R35E
N67S
G78D
R127Q


N24A
G54D
N67S
G78D
R159F


N24A
R35D
N67A
G78D
R159F


N24Q
R35D
N67L
G78D
R159K


N24Q
R35D
N67L
G78D
R159N


N24Q
R35D
N67S
R127K
R159E


N24Q
R35E
N67A
R127K
R159E


N24Q
R35E
N67A
G78D
R159E


N24T
N67A
G78D
R127Q
R159N


N24T
R35E
N67A
G78D
R127Q


R35E
G54D
N67S
G78D
R159K


N24A
G54D
N67S
G78D
R127K
R159K


N24A
R35E
N67S
G78D
R127K
R159K


N24E
R35E
G54D
N67S
R127K
R159N


N24Q
R35D
N67S
G78D
R127K
R159F


N24T
G54D
N67S
G78D
R127Y
R159E


N24E
R35E
G54D
N67S
G78D
R127K
R159K









Example 4
Preparation of ASP Variant Crude Enzyme Samples
The Asp variant proteins were produced by growing the B. subtilis transformants (described above and in U.S. patent application Ser. No. 10/576,331) in 96 well MTP at 37° C. for 68 hours in MBD medium (a MOPS based defined medium). MBD medium was made essentially as known in the art (See, Neidhardt et al., J. Bacteriol., 119: 736-747 [1974]), except that NH4Cl2, FeSO4, and CaCl2 were left out of the base medium, 3 mM K2HPO4 was used, and the base medium was supplemented with 60 mM urea, 75 g/L glucose, and 1% soytone. Also, the micronutrients were made up as a 100× stock containing in one liter, 400 mg FeSO4.7H2O, 100 mg MnSO4.H2O, 100 mg ZnSO4.7H2O, 50 mg CuCl2.2H2O, 100 mg CoCl2.6H2O, 100 mg NaMoO4.2H2O, 100 mg Na2B4O7.10H2O, 10 ml of 1M CaCl2, and 10 ml of 0.5 M sodium citrate.
In the following Examples, tests conducted on various mutants of ASP are described. The methods described above in Example 1 were used. In the following Tables, “Variant Code” provides the wild-type amino acid, the position in the amino acid sequence, and the replacement amino acid (i.e., “F001A” indicates that the phenylalanine at position 1 in the amino acid sequence has been replaced by alanine in this particular variant).
Example 5
Casein Hydrolysis Activity of Multiply-Substituted Variants
In this Example, experiments conducted to determine the caseinolytic activity of various multiply-substituted ASP variants are described. In these experiments, the protocol used is described in Example 1, above. The following table provides the variants, including the mutations in each variant, as well as the casein activity for those with activity greater than that of wild-type ASP plus 1 standard deviation (>1.13 activity units).







TABLE 5-1







Caseinolytic Activity











Casein



Variants
Activity














R14L-R79T
1.61



G12D-R35H-R159E
1.27



G12D-R35H-R123Q
1.30



G12D-R35H-R123F-R159E
1.45



G12D-R35H
1.69



G12D-R35E-R159E
1.22



G12D-R35E-R123Q-R159E
1.16



G12D-R35E-R123Q
1.14



G12D-R35E
1.43



G12D-R35D-R159E
1.18



G12D-R35D-R123Q-R159E
1.27



G12D-R35D
1.64



G12D-R159E
1.49



G12D-R14Q-R35H
1.39



G12D-R14I-R35H
1.41



N024E-G049A-A093H--R127K-
1.15



A143N-R159K-I181Q



N24M-S76V-A93H-R127K-
1.13



R159K



R14I-N24E-R35D-A64K-N67A-
1.13



G78D-R123F-R159K-D184T










The following table provides the variants, including the mutations in each variant, as well as the casein activity for those with activity greater than that of wild-type ASP plus 1 standard deviation (>0.85 activity units).







TABLE 5-2







Caseinolytic Activity










Variant
Casein Activity














R127A-R159K
0.86



R14I-G65Q
1.04



R14I-G65Q-R159K
0.99



R14I-S76V
1.43










As indicated by these results, numerous multiply-substituted variants performed better than the wild-type ASP in this assay system.
Example 6
Keratin Hydrolysis Activity of Multiply-Substituted Variants
In this Example, experiments conducted to determine the keratinolytic activity of various multiply-substituted ASP variants are described. In these experiments, the protocol used is described in Example 1, above. The following table provides the variants, including the mutations in each variant, as well as the keratin hydrolysis activity for those with activity greater than that of wild-type ASP plus 1 standard deviation (≧1.1 performance index).







TABLE 6-1







Keratin Hydrolysis Activity


Assay Results











Keratin Hydrolysis



Variants
[Perf. Ind.]














N024E-G049A-A093H--
1.32



R127K-A143N-R159K-



I181Q



N024E-G049A-A093H-
1.37



S099A-R127K-A143N-



R159K-I181T-V090I



N024E-G049A-A093S-
1.28



S099D-R127K-A143N-



R159K-I181Q



N024Q-G049A-A093S-
1.17



S099A-R127K-A143N-



R159K-I181Q



N024Q-G049A-A093S-
1.19



S099A-R127K-A143N-



R159K-I181T



N024Q-G049A-A093S-
1.13



S099N-R127K-A143N-



R159K-I181Q



N024T-G049A-A093S-
1.12



S099A-R127K-A143N-



R159K-I181T



N024W-G049A-A093S-
1.13



S099A-R127K-A143N-



R159K-I181Q



N24A-G54E-S76D-A93G-
1.53



R127K-R159K



N24E-A93G-R127K-
1.33



R159K



N24E-G54L-S76E-A93G-
1.21



R127K-R159K



N24E-G54Q-A93S-R127K-
1.37



R159K



N24E-S76D-A93T-R127K-
1.64



R159K



N24M-G54E-A93H-
1.24



R127K-R159K



N24M-G54E-S76N-A93S-
1.24



R127K-R159K



N24Q-A93G-R127K-
1.17



R159K



N24Q-G54D-S76L-A93G-
1.15



R127K-R159K



N24Q-G54I-S76E-A93H-
1.12



R127K-R159K



N24T-G54D-S76V-A93G-
1.11



R127K-R159K



N24T-G54E-S76V-A93H-
1.28



R127K-R159K



N24W-G54D-A93H-
1.20



R127K-R159K



N24W-S76E-A93G-
1.13



R127K-R159K



R014I-S076A-A093G-
1.27



R127K-R159K-I181T



R014I-S076A-A093H-
1.22



R127K-R159K-I181Q



R014I-S076D-A093H-
1.40



R127K-R159K-I181Q



R014I-S076D-A093H-
1.46



R127K-R159K-I181T



R014I-S076D-A093S-
1.49



R127K-R159K-I181T



R014I-S076E-A093S-
1.54



R127K-R159K-I181Q



R014I-S076E-A093T-
1.34



R127K-R159K-I181K



R014I-S076I-A093S-
1.27



R127K-R159K-I181Q



R014I-S076N-A093H-
1.18



R127K-R159K-I181Q



R014I-S076T-A093G-
1.22



R127K-R159K-I181Q



R014I-S076V-A093H-
1.23



R127K-R159K-I181Q



R014K-S076A-A093S-
1.15



R127K-R159K-I181T



R014K-S076E-A093H-
1.14



R127K-R159K-I181T



R014K-S076E-A093S-
1.19



R127K-R159K-I181T



R014K-S076T-A093H-
1.11



R127K-R159K-I181Q



R014L-S076A-A093H-
1.36



R127K-R159K



R014L-S076A-A093H-
1.24



R127K-R159K-I181Q



R014L-S076D-A093H-
1.32



R127K-R159K-I181T



R014L-S076E-A093H-
1.30



R127K-R159K-I181K



R014M-S076A-A093G-
1.26



R127K-R159K-I181T



R014M-S076A-A093H-
1.15



R127K-R159K-I181T



R014M-S076A-A093S-
1.22



R127K-R159K-I181K



R014M-S076A-A093S-
1.24



R127K-R159K-I181T



R014M-S076A-A093T-
1.13



R127K-R159K-I181Q



R014M-S076D-A093S-
1.36



R127K-R159K-I181T



R014M-S076E-A093G-
1.25



R127K-R159K-I181T



R014M-S076E-A093H-
1.42



R127K-R159K-I181T



R014M-S076E-A093S-
1.46



R127K-R159K-I181T



R014M-S076N-A093G-
1.11



R127K-R159K-I181K



R014M-S076N-A093G-
1.21



R127K-R159K-I181T



R014M-S076N-A093H-
1.23



R127K-R159K-I181T



R014M-S076N-A093S-
1.25



R127K-R159K-I181T



R014M-S076V-A093G-
1.21



R127K-R159K-I181Q



R14I-N24Q-A64K-G78D-
1.11



R123F-R159K-D184T



R14I-N24A-A64K-N67S-
1.34



G78D-R123F-R159K-



D184T



R14I-N24Q-R35D-A64K-
1.21



N67S-R123F-R159K-



D184T



R14I-N24E-A64K-R123F-
1.31



R127K-R159K-D184T



R14I-N24Q-A64K-R123F-
1.28



R127Q-R159K-D184T



R14I-N24Q-A64K-G78D-
1.21



R123F-R127Q-R159N-



D184T



R14I-N24E-A64K-N67L-
1.49



G78D-R123F-R159K-



D184T



R14I-N24Q-R35D-A64K-
1.26



N67S-R123F-R159K-



D184T



R127Q-R159K
1.14



G78D-R127K-R159K
1.24



N67S-G78D-R127K-
1.39



R159K



R35D-R159K
1.17



G78D-R127Q-R159K
1.26



N24A-N67A-R159K
1.17



T36S-R127Q-R159E
1.77



S15E-T121E-R123Q
1.32



S15E-R35H-R159E
1.23



S15E-R35E
1.33



S15E-R159E
1.12



S15E-R123Q
1.54



S15E-R123E
1.92



R79T R127Q R179Q
1.55



R35H-R159E
1.12



R35H-R127Q-R159E
1.23



R35F R61S R159Q
1.24



R35F R159Q
1.39



R35E-R159E
1.52



R35E-R127Q
1.21



R35D-R159E
1.52



R35D-R127Q
1.29



R16Q R79T R159Q R179Q
1.36



R16Q R79T R127Q
1.68



R16Q R79T R123L
1.35



R16Q R79T
1.24



R16Q R35F R123L R159Q
1.20



R16Q R159Q R179Q
1.14



R16Q R127Q R159Q
1.35



R16Q R123L R159Q
1.32



R14Q-T121E
1.44



R14Q-R35E-T121E
1.11



R14Q-R35E-R159E
1.20



R14Q-R35E
1.49



R14Q-R35D-R127Q
1.39



R14Q-R35D
1.46



R14L R79T R127Q R159Q
1.30



R14L R61S R79T R123L
1.30



R14L R35F R61S
1.27



R14L R127Q R159Q
1.47



R179Q



R14L R123L R159Q
1.34



R14I-R35E-R127Q
1.74



R14I-R35E-R123E
1.19



R14I-R35D-R159E
1.20



R14E-R35H-R127Q
1.60



R127Q-R159E
2.44



R127Q R159Q
1.37



R123Q-R159E
1.64



R123Q-R127Q-R159E
1.34



R123L R159Q
1.51



R123L R127Q R159Q
1.11



R123F-R159E
1.64



R123E-R127Q-R159E
1.15



R123E-R127Q
1.65



G12D-S15E-R35H-R159E
1.40



G12D-S15E-R35D
1.59



G12D-S15E-R159E
1.34



G12D-S15E
1.81



G12D-R35H-T121E-
1.96



R123Q



G12D-R35H-R159E
1.98



G12D-R35H-R127Q-
1.73



R159E



G12D-R35H-R123Q
2.43



G12D-R35H-R123F-
1.44



R159E



G12D-R35H
2.02



G12D-R35E-R159E
1.47



G12D-R35E-R123Q-
1.29



R159E



G12D-R35E-R123Q
2.28



G12D-R35E
1.98



G12D-R35D-R159E
1.23



G12D-R35D-R127Q
1.59



G12D-R35D
2.23



G12D-R159E
2.46



G12D-R14Q-R35H
2.20



G12D-R14Q-R35D-R123H
1.20



G12D-R14Q-R159E
1.55



G12D-R14I-R35H
2.82



G12D-R14E
2.00



G12D-R127Q-R159E
1.83



G12D-R123E-R159E
1.26










The following table provides the variants, including the mutations in each variant, as well as the keratinolytic activity for those with activity greater than that of wild-type ASP plus 1 standard deviation (>1.2 Performance Index).







TABLE 6-2







Kertain Hydrolysis


Assay Results











Keratin




Hydrolysis



Variant
[Perf. Ind.]














R127A-R159K
1.84



R14I-G65Q
1.96



R14I-G65Q-R127A-
1.42



R159K



R14I-G65Q-R159K
1.78



R14I-R127A
1.23



R14I-R127A-R159K
1.45



R14I-R159K
2.69



R14I-R35F
1.32



R14I-R35F-G65Q
1.50



R14I-R35F-G65Q-
1.66



R127A-R159K



R14I-R35F-R159K
1.71



R14I-S76V
2.39



R14I-T36S-G65Q-
1.90



R127A-R159K



R35F-R127A-R159K
1.75










As indicated by these results, numerous multiply-substituted variants performed better than the wild-type ASP in this assay system.
Example 7
Thermostability of Multiply-Substituted Variants
In this Example, experiments conducted to determine the thermostability of various multiply-substituted ASP variants are described. In these experiments, the protocol used is described in Example 1, above. The following table provides the variants, including the mutations in each variant, as well as the residual casein activity for those with activity greater than that of wild-type ASP plus 1 standard deviation (≧48% residual activity).







TABLE 7-1







Thermostability Assay Results











Thermostability



Variants
[% Res. Act]














T121E-R123F-R159E
61



R79T-R127Q-R179Q
55



R16Q-R79T-R127Q
55



R16Q-R79T-R123L-R159Q-
61



R179Q



R16Q-R79T-R123L
65



R16Q-R79T
64



R16Q-R123L-R159Q
49



R14Q-T121E
59



R14L-R79T
71



R123L-R159Q
54



R123L-R127Q-R159Q
69



G12D-S15E-R35D-R123F-
59



R159E



G12D-S15E-R159E
54



G12D-S15E
64



G12D-R35H-T121E-R123Q
57



G12D-R35H-R123Q
59



G12D-R35H-R123F-R159E
60



G12D-R35H
57



G12D-R35E-R123Q
51



G12D-R35E
52



G12D-R159E
53



G12D-R14Q-S15E-R35D
52



G12D-R14Q-R35H
51



G12D-R14Q-R159E
49



G12D-R14E
84



G12D-R127Q-R159E
63



G12D-R123E-R159E
58










As indicated by these results, numerous multiply-substituted variants performed better than the wild-type ASP in this assay system.
Example 8
LAS Stability of Multiply-Substituted Variants
In this Example, experiments conducted to determine the LAS stability of various multiply-substituted ASP variants are described. In these experiments, the protocol used is described in Example 1, above, with a temperature of 25° C. used. The following table provides the variants, including the mutations in each variant, as well as the residual AAPF activity for those with residual activity greater than that of wild-type ASP plus 1 standard deviation (≧10% residual activity).







TABLE 8-1







LAS Stability Assay Results











LAS Stability



Variants
[%]














T121E-R123F-R159E
73



S15E-T121E-R123Q
87



S15E-R35H-R159E
88



S15E-R35E-R159E
93



S15E-R35E-R127Q-
102



R159E



S15E-R35E
82



S15E-R35D-T121E-
100



R123Q



S15E-R35D-R123Q
90



S15E-R35D-R123F-
97



R159E



S15E-R35D
81



S15E-R159E
62



S15E-R127Q
67



S15E-R123Q
66



S15E-R123E
81



R79T R127Q R179Q
53



R35H-R159E
82



R35H-R127Q-R159E
89



R35H-R123D-R159E
82



R35F R61S R159Q
78



R35F R159Q
44



R35E-T121E-R123E
92



R35E-R159E
93



R35E-R127Q
84



R35D-R159E
88



R35D-R127Q-R159E
95



R35D-R127Q
89



R35D-R123Q-R159E
94



R16Q R79T R159Q
93



R179Q



R16Q R79T R127Q
92



R16Q R79T R123L
96



R159Q R179Q



R16Q R79T R123L
89



R159Q



R16Q R79T R123L
74



R16Q R79T
38



R16Q R61S R159Q
95



R179Q



R16Q R61S R123L
96



R159Q



R16Q R35F R61S R159Q
97



R16Q R35F R159Q
82



R16Q R35F R123L
91



R159Q



R16Q R35F
54



R16Q R159Q R179Q
83



R16Q R159Q
69



R16Q R127Q R179Q
88



R16Q R127Q R159Q
76



R16Q R123L R159Q
85



R14Q-T121E
88



R14Q-R35E-T121E
96



R14Q-R35E-R159E
91



R14Q-R35E
94



R14Q-R35D-R127Q
88



R14Q-R35D-R123E-
93



R159E



R14Q-R35D-R123D-
99



R159E



R14Q-R35D
85



R14Q-R123Q
87



R14L R79T R127Q
90



R159Q



R14L R79T
32



R14L R61S R79T R123L
97



R14L R61S R123L
85



R14L R35F R79T R123L
90



R159Q



R14L R35F R61S
80



R14L R127Q R159Q
86



R179Q



R14L R123L R159Q
91



R14I-R35E-T121E-R159E
100



R14I-R35E-R127Q
97



R14I-R35E-R123E
95



R14I-R35D-R159E
98



R14I-R35D-R127Q-
99



R159E



R14E-S15E-R35H
92



R14E-R35H-R127Q
91



R14D-S15E-R35E-R159E
98



R14D-R35H-R123Q-
98



R159E



R127Q-R159E
40



R127Q R159Q
39



R123Q-R159E
42



R123Q-R127Q-R159E
51



R123L R159Q
36



R123L R127Q R159Q
56



R123F-R159E
67



R123E-R127Q-R159E
65



R123E-R127Q
49



G12D-S15E-R35H-R159E
100



G12D-S15E-R35H-
100



R123F-R127Q-R159E



G12D-S15E-R35E-R159E
103



G12D-S15E-R35D-R127Q
99



G12D-S15E-R35D-
101



R123F-R159E



G12D-S15E-R35D-R123E
100



G12D-S15E-R35D
97



G12D-S15E-R159E
96



G12D-S15E
76



G12D-R35H-T121E-
98



R123Q



G12D-R35H-R159E
96



G12D-R35H-R123Q-
97



R159E



G12D-R35H-R123Q
89



G12D-R35H-R123F-
98



R159E



G12D-R35H
79



G12D-R35E-R159E
101



G12D-R35E-R123Q-
96



R159E



G12D-R35E-R123Q
92



G12D-R35E
97



G12D-R35D-R159E
95



G12D-R35D-R127Q
98



G12D-R35D-R123Q-
103



R159E



G12D-R35D
94



G12D-R159E
97



G12D-R14Q-S15E-R35D
101



G12D-R14Q-R35H
88



G12D-R14Q-R35E-
100



R127Q-R159E



G12D-R14Q-R35D-
100



R123H



G12D-R14Q-R159E
96



G12D-R14I-R35H
94



G12D-R14E
85



G12D-R14D-R35H-
100



R123D-R127Q



G12D-R127Q-R159E
93



G12D-R123E-R159E
99



R127A-R159K
24



R14I-G65Q
13



R14I-G65Q-N67L-R159K
11



R14I-G65Q-N67L-Y75G-
11



R127A-R159K



R14I-G65Q-R159K
33



R14I-G65Q-S76V-
11



R127A-R159K



R14I-R127A
71



R14I-R127A-R159K
77



R14I-R159K
58



R14I-R35F
64



R14I-R35F-G65Q
47



R14I-R35F-G65Q-R127A-
76



R159K



R14I-R35F-N67L-R127A-
61



R159K



R14I-R35F-R127A-
81



R159K



R14I-R35F-R159K
70



R14I-S76V
14



R14I-T36S-G65Q-R127A-
32



R159K



R35F-R127A-R159K
57



R35F-S76A-R127A
58










In additional experiments, the LAS stability of variants having multiple substitutions were tested. In the first set of experiments, the test conditions described in Example 1 were used at a temperature of 25° C. In the following Table, the variants with activity greater than wild-type, plus one standard deviation (>20% residual activity) are presented.







TABLE 8-2







Results of LAS Stability


Assays at 25° C.











LAS-25° C.



Variant
Stability [%]














N024A-G049A-A093H-
25



S099N-R127K-A143N-



R159K-I181Q



N024A-S076A-A093H-
47



S099G-R127K-R159K



N024A-S076T-A093S-
41



S099G-R127K-R159K



N024E-G049A-A093G-
31



S099G-R127K-A143N-



R159K-I181T



N024E-G049A-A093H--
53



R127K-A143N-R159K-



I181Q



N024E-G049A-A093H-
75



S099A-R127K-A143N-



R159K-I181T-V090I



N024E-G049A-A093S-
27



S099D-R127K-A143N-



R159K-I181Q



N024H-G049A-A093T-
41



S099A-R127K-A143N-



R159K-I181Q



N024H-S076A-A093G-
53



S099G-R127K-R159K



N024H-S076A-A093H-
78



S099G-R127K-R159K



N024H-S076A-A093S-
26



S099A-R127K-R159K-



G054H-L069H



N024H-S076A-A093T-
46



S099G-R127K-R159K



N024H-S076N-A093Q-
33



S099W-R127K-R159K



N024H-S076V-A093Q-
29



S099G-R127K-R159K



N024L-G049A-A093H-
31



S099A-R127K-A143N-



R159K-I181Q



N024L-G049A-A093S-
23



S099A-R127K-A143N-



R159K-I181Q



N024L-S076V-A093H-
30



S099G-R127K



N024L-S076V-A093S-
29



S099A-R127K-R159K



N024M-G049A-A093G-
39



S099A-R127K-A143N-



R159K-I181Q



N024M-G049A-A093H-
26



S099D-R127K-A143N-



R159K-I181Q



N024M-G049A-A093S-
35



S099A-R127K-A143N-



R159K-I181Q



N024M-G049A-A093S-
23



S099W-R127K-A143N-



R159K-I181Q



N024Q-G049A-A093H-
40



S099A-R127K-A143N-



R159K-I181T



N024Q-G049A-A093S-
50



S099A-R127K-A143N-



R159K-I181Q



N024Q-G049A-A093S-
28



S099A-R127K-A143N-



R159K-I181T



N024Q-S076A-A093H-
58



S099A-R127K-R159K-



T039N



N024Q-S076A-A093H-
38



S099W-R127K-R159K



N024Q-S076I-A093T-
25



S099G-R159K



N024Q-S076T-A093S-
48



R127K-R159K



N024S-S076A-A093G-
46



S099G-R127K-R159K-



G054A



N024S-S076A-A093H-
41



S099T-R127K-R159K



N024S-S076A-A093S-
47



S099W-R127K-R159K



N024S-S076A-A093T-
21



S099W-R127K



N024S-S076T-A093Q-
37



S099W-R127K-R159K



N024S-S076Y-A093T-
50



S099A-R127K-R159K



N024T-G049A-A093G-
48



S099A-R127K-A143N-



R159K-I181Q



N024T-G049A-A093H-
60



S099A-R127K-A143N-



R159K-I181Q



N024T-G049A-A093H-
58



S099A-R127K-A143N-



R159K-I181T



N024T-G049A-A093H-
21



S099D-R127K-A143N-



R159K-I181Q



N024T-G049A-A093S-
41



S099A-R127K-A143N-



R159K-I181T



N024T-G049A-A093T-
27



S099A-R127K-A143N-



R159K-I181T



N024T-S076N-A093Q-
26



S099T-R127K-R159K



N024T-S076T-A093T-
37



S099N-R127K-R159K



N024V-S076A-R127K-
60



R159K



N024V-S076V-A093Q-
33



S099G-R127K-R159K



N024W-A093G-S099W-
33



R127K-R159K



N024W-G049A-A093H-
35



S099A-R127K-A143N-



R159K-I181Q



N024W-G049A-A093S-
22



S099A-R127K-A143N-



R159K-I181K



N024W-G049A-A093S-
25



S099A-R127K-A143N-



R159K-I181Q



N024W-S076A-A093T-
60



S099A-R127K-R159K



N024W-S076I-A093Q-
26



S099G-R127K-R159K



N024W-S076N-A093T-
30



S099G-R159K



N024W-S076T-A093H-
44



S099A-R127K-R159K



N024W-S076T-A093H-
34



S099W-R127K-R159K



N024W-S076V-A093H-
26



S099A-R127K-R159K



N024W-S099W-R127K-
32



R159K



N24A-G54E-S76D-
50



A93G-R127K-R159K



N24E-A93G-R127K-
53



R159K



N24E-G54L-S76E-
22



A93G-R127K-R159K



N24E-G54Q-A93S-
50



R127K-R159K



N24E-S76D-A93T-
40



R127K-R159K



N24H-A93H-R127K-
41



R159K



N24H-G54E-A93G-
46



R127K-R159K



N24H-S76D-A93H-
35



R127K-R159K



N24L-A93G-R127K-
32



R159K



N24L-G54E-A93G-
46



R127K-R159K



N24L-G54L-A93G-
21



R127K-R159K



N24L-G54Q-S76A-
37



A93H-R127K-R159K



N24L-S76T-A93G-
24



R127K-R159K



N24L-S76T-A93H-
30



R127K-R159K



N24M-A93G-R127K-
33



R159K



N24M-A93H-R127K-
41



R159K



N24M-A93S-R127K-
36



R159K



N24M-A93T-R127K-
29



R159K



N24M-G54E-A93H-
54



R127K-R159K



N24M-G54E-S76N-
46



A93S-R127K-R159K



N24M-G54I-A93H-
31



R127K-R159K-S187I



N24Q-A93G-R127K-
37



R159K



N24Q-G54D-A93H-
43



R127K-R159K



N24Q-G54I-A93G-
25



R127K-R159K



N24Q-G54I-S76E-A93H-
22



R127K-R159K



N24Q-G54Q-A93G-
32



R127K-R159K



N24Q-G54Q-S76T-
30



A93H-R127K-R159K



N24Q-S76A-A93G-
37



R127K-R159K



N24T-G54D-S76V-
26



A93G-R127K-R159K



N24T-G54E-S76V-
38



A93H-R127K-R159K



N24T-G54I-A93G-
38



R127K-R159K



N24T-G54N-A93H-
27



R127K-R159K



N24T-G54Q-S76N-
40



A93G-R127K-R159K



N24T-G54Q-S76V-
26



R127K-R159K



N24T-S76I-R127K-
25



R159K



N24T-S76L-A93G-
20



R127K-R159K



N24W-A93G-R127K-
35



R159K



N24W-G54D-A93H-
35



R127K-R159K



N24W-G54I-S76A-
26



A93H-R127K-R159K



N24W-S76A-A93H-
36



R127K-R159K



N24W-S76E-A93G-
21



R127K-R159K



R014I-S076A-A093G-
44



R127K-R159K-I181T



R014I-S076A-A093H-
54



R127K-R159K-I181K



R014I-S076A-A093H-
71



R127K-R159K-I181Q



R014I-S076A-A093H-
38



R127K-R159K-I181T



R014I-S076D-A093H-
75



R127K-R159K-I181Q



R014I-S076D-A093S-
41



R127K-R159K-I181T



R014I-S076E-A093S-
64



R127K-R159K-I181Q



R014I-S076E-A093T-
30



R127K-R159K-I181K



R014I-S076I-A093S-
23



R127K-R159K-I181Q



R014I-S076N-A093H-
68



R127K-R159K-I181Q



R014I-S076T-A093G-
57



R127K-R159K-I181Q



R014K-S076A-A093G-
20



R127K-R159K-I181K



R014K-S076E-A093H-
20



R127K-R159K-I181K



R014K-S076T-A093H-
24



R127K-R159K-I181Q



R014L-S076A-A093H-
69



R127K-R159K



R014L-S076A-A093H-
66



R127K-R159K-I181Q



R014L-S076D-A093H-
39



R127K-R159K-I181T



R014L-S076E-A093H-
36



R127K-R159K-I181K



R014M-S076A-A093G-
45



R127K-R159K-I181K



R014M-S076A-A093G-
37



R127K-R159K-I181T



R014M-S076A-A093H-
36



R127K-R159K-I181T



R014M-S076A-A093S-
49



R127K-R159K-I181K



R014M-S076A-A093S-
40



R127K-R159K-I181T



R014M-S076A-A093T-
57



R127K-R159K-I181Q



R014M-S076D-A093S-
35



R127K-R159K-I181T



R014M-S076E-A093G-
32



R127K-R159K-I181T



R014M-S076E-A093H-
32



R127K-R159K-I181T



R014M-S076E-A093S-
39



R127K-R159K-I181T



R014M-S076N-A093G-
42



R127K-R159K-I181K



R014M-S076N-A093G-
36



R127K-R159K-I181T



R014M-S076N-A093H-
75



R127K-R159K-I181Q



R014M-S076N-A093H-
42



R127K-R159K-I181T



R014M-S076N-A093S-
37



R127K-R159K-I181T



R014M-S076N-A093T-
33



R127K-R159K-I181T



R014M-S076T-A093H-
37



R127K-R159K-I181K



R014M-S076V-A093G-
25



R127K-R159K-I181Q



R014M-S076V-A093H-
22



R127K-R159K-I181Q










In further experiments, yet other test conditions were used. In one set of experiments, the LAS stability was tested at a higher temperature (35° C.), using the protocol described in Example 1. In the following table, the percent residual activity for variants that exhibited activity greater than wild-type plus one standard deviation (>5% residual activity) is presented.







TABLE 8-3







Results of LAS Stability


Assay at 35° C.











LAS Stability




(35° C.)



Variant
[%]














G54E-R14L
32



G54L-R127S
6



N24D-G54F-
6



R127C



N24E-R127S
7



N24E-R159C
7



N24G-G54I-R127S
10



N24H-R159Y-T46I
52



N24I-R127V-R14V
18



N24T-R127Q-
11



R179F



R127A-R159V-
12



R179F



R127C-R14W
7



R127S-R159N-
50



R123L



R14A-N24F-
25



R159L



R14A-R127L
28



R14A-R127Y-
28



R159W



R14A-R159W
9



R14C-S114F-
25



R159G



R14F-R127L-
19



R159F



R14F-R127Q-
37



R159W



R14F-R127S-
32



R159V



R14F-R127V-
16



R159F



R14G-N24L-
13



R159G



R14G-N24S-
47



R127C



R14G-R127C-
58



G63E



R14G-R127G
19



R14G-R127P
9



R14L-N24S-R159F
20



R14L-N24V-
31



R127S-R159I



R14L-R123L
25



R14L-R127C-
32



R159G



R14L-R127S
22



R14L-R127S-
31



R159G



R14L-R127V
17



R14L-R127V-
27



R159F



R14L-R127W-
47



R123Y



R14L-R127Y
10



R14L-R127Y-
30



R159F



R14L-R159G
23



R14L-R159L
30



R14L-R159S
43



R14L-R159V
40



R14L-R159W
5



R14M-N24L-
39



R159S-R123V



R14M-R159F
17



R14Q-R123F
56



R14S-N24E-
13



R127W



R14S-N24L-
17



R159G



R14S-R127L-
41



R159F



R14S-R127V
33



R14T-R14P-R159F
33



R14T-N24A
6



R14T-N24T-
69



R127Q



R14T-N24T-
42



R127Y-R159W



R14T-R127Y
29



R14V-N24A-
26



R127I-R159A



R14V-N24D-
69



R127C



R14V-N24G-
7



P189S



R14V-N24S
9



R14V-N24Y-
37



R127S-R159G



R14V-R127A
48



R14V-R127C-
62



R159S



R14V-R127M-
63



R159V



R14V-R127S-
47



R159G



R14V-R127T-
49



R159Y



R14V-R127V
27



R14V-R159F
33



R14V-R159V
53



R14V-R159W
12



R14W-N24T-
48



R123E



R14W-R123L
6



R14W-R123V
19



R14W-R127Q-
13



R159W



R14W-R159V
13



R159V-G49D
6










In additional experiments, variants were tested at 35° C., using the protocol described in Example 1. In the following Table, results for variants with G12D and R35E, and >70% residual activity are presented.







TABLE 8-4







Results of LAS Stability Assay at 35° C.











LAS-35° C.




G12D-R35E



Variant
Stability [%]







G012D-R035E-G065E
73



G012D-R035E-G065E
73



G012D-R035E-Q081P
79



G012D-R035E-R016S-
77



A064T



G012D-R035E-R159W
74



G012D-R035E-R179I
82



G012D-R035E-S092T-
71



I181V










In additional experiments, yet other conditions were used. In one set of experiments, the performance indices for numerous multiple substituted variants were determined using the protocol in Example 1 and tested at 25° C. In the following table, the performance index results (PI) for variants with residual activity greater than wild-type plus 1 standard deviation (>1.1 performance index) are presented.







TABLE 8-5







LAS Assay Stability Results











LAS (25° C.)



Variant
[Perf. Ind.]














R14I-N24A-A64K-R123F-
2.97



R159E-D184T




R14I-A64K-R123F-R159F-
3.99



D184T




R14I-A64K-R123F-R159E-
3.82



D184T




R14I-N24Q-R35E-A64K-
3.89



R123F-D184T




R14I-N24Q-A64K-N67S-
1.24



R123F-R159F-D184T




R14I-N24A-R35E-A64K-
1.20



N67S-R123F-R159E-




D184T




R14I-N24A-R35E-A64K-
1.20



N67S-G78D-R123F-D184T




R14I-N24A-R35D-A64K-
1.72



G78D-R123F-R127K-




R159E-D184T




R14I-N24A-R35D-A64K-
2.88



R123F-R127K-R159F-




D184T




R14I-N24T-R35D-A64K-
3.75



G78D-R123F-R127Q-




R159F-D184T




R14I-A64K-R123F-D184T
3.99



R14I-N24A-A64K-R123F-
2.94



R159N-D184T




R14I-N24Q-R35D-A64K-
1.31



N67S-R123F-R159K-




D184T




R14I-N24E-R35E-A64K-
9.51



G78D-R123F-R127Q-




R159F-D184T




R14I-N24E-A64K-R123F-
6.64



R127K-R159K-D184T




R14I-N24A-A64K-R123F-
2.80



D184T




R14I-A64K-R123F-
4.25



R127K-R159F-D184T



R14I-A64K-R123F-R159E-
4.22



D184T



R14I-A64K-R123F-
3.93



R159N-D184T



R14I-A64K-R123F-
3.83



R159K-D184T



R14I-A64K-R123F-
4.32



R127Y-R159E-D184T



R14I-N24A-R35E-A64K-
2.40



N67A-G78D-R123F-



D184T



R14I-A64K-R123F-
4.08



R127Y-R159K-D184T



R14I-N24Q-A64K-R123F-
3.92



R127Q-R159K-D184T



R14I-A64K-R123F-
4.29



R159K-D184T



R14I-N24Q-A64K-G78D-
1.87



R123F-R127Q-R159N-



D184T



R14I-N24E-A64K-N67L-
1.33



G78D-R123F-R159K-



D184T



R14I-N24A-R35E-A64K-
1.91



G78D-R123F-R127K-



R159E-D184T



R14I-N24Q-R35D-A64K-
1.33



N67S-R123F-R159K-



D184T



R14I-N24A-R35D-A64K-
1.22



N67A-R123F-R159F-



D184T



R14I-N24E-R35E-G54D-
2.64



A64K-N67L-G78D-R123F-



R127K-D184T



R14I-A64K-G78D-R123F-
1.60



R127Q-R159N-D184T




R14I-N24A-R35E-A64K-
1.74



G78D-R123F-R159N-




D184T




R14I-A64K-R123F-
4.27



R127K-R159E-D184T




R14I-N24A-R35E-A64K-
1.20



N67S-G78D-R123F-




R127K-R159F-D184T




R14I-A64K-G78D-R123F-
1.71



R159E-D184T




R14I-N24E-R35D-A64K-
4.23



N67A-G78D-R123F-




R159K-D184T




N24T-R35D-G78D-R159K
6.53



N24T-R35E-N67A-G78D-
1.36



R127Q




N24Q-R35E
6.60



R127K-R159N
6.02



R35D-R159E
7.25



R35E-G54D-N67S-G78D-
1.58



R159K




N24Q-G54D-G78D-R159N
2.84



R127K-R159E
6.58



R127Q-R159K
5.76



N24E-R35E-G54D-N67S-
9.73



R127K-R159N




R35D-G78D-R159K
5.17



N67S-R159E
2.05



G54D-R127K-R159K
6.11



G78D-R127K-R159K
2.76



G78D-R127K-R159E
2.63



N24E-R35D-G78D-
11.02



R127K-R159N



R35D-G78D-R127K-
5.38



R159N



N24A-R35E-G78D-R159N
4.03



N24Q-R35D-N67S-
2.13



R127K-R159E



N24T-R35D-G78D-R159K
6.73



N67S-G78D-R127K-
1.12



R159K



N24Q-R35D-R127K-
7.33



R159K



N24E-G54D-G78D-R159K
8.72



R35D-R159K
6.89



R35E-R159K
7.66



R127K-R159K
5.82



R35E-N67S-G78D-R127Q
2.67



N24E-R35D-G78D
11.21



R35D-G78D-R127K-
5.44



R159E



N24E-R35E-G54D-N67S-
7.87



G78D-R127K-R159K



N24T-N67S-R159E
3.10



N24D-R35D-G78D-R159F
9.11



N24Q-R35D-N67S-G78D-
1.50



R127K-R159F



R35D-G78D-R127Q-
4.41



R159K



G78D-R159F
2.48



N24A-N67S-R159K
1.14



G78D-R127Q-R159K
2.63



N24T-G54D-N67S-G78D-
2.42



R127Y-R159E










In additional experiments, the LAS stability of numerous variants was tested at 25° C., using the protocol set forth in Example 1. As above, the selection criterion was residual activity greater than WT+1 standard deviation (>1.1 Performance Index).







TABLE 8-6







LAS Stability Assay Results











LAS Stab-25°



Variant
[Perf. Ind]














R14I-A63K-G78D-
2.66



R123F-D184T




R14I-A63K-R123F-
3.53



R159E-D184T




R14I-A63K-R123F-
3.48



R159F-D184T




R14I-A63K-R123F-
3.33



R159K-D184T




R14I-A63K-R123F-
3.83



R159N-D184T




R14I-A63K-R123K-
3.38



D184T




R14I-A63K-R123Q-
3.58



D184T




R14I-A63K-R123Y-
3.62



D184T




R14I-A64K-G78D-
1.47



T86K-T116E-R123F




R14I-A64K-T86K-
5.21



T116E-R123F-R159E




R14I-A64K-T86K-
5.11



T116E-R123F-R159K




R14I-A64K-T86K-
4.21



T116E-R123K




R14I-A64K-T86K-
4.74



T116E-R123Q




R14I-A64K-T86K-
4.34



T116E-R123Y




R14I-G54D-A63K-
2.74



R123F-D184T




R14I-G54D-A64K-
4.12



T86K-T116E-R123F




R14I-G54D-S76N-
8.53



A93H-R127K-R159K-




I181Q




R14I-G54D-S76V-
3.53



A93S-R127K-R159K-




I181K




R14I-N24A-A63K-
2.59



R123F-D184T




R14I-N24A-A64K-
3.11



T86K-T116E-R123F



R14I-N24E-A63K-
7.31



R123F-D184T



R14I-N24E-A64K-
9.39



T86K-T116E-R123F



R14I-N24Q-A63K-
4.13



R123F-D184T



R14I-N24Q-A64K-
4.51



T86K-T116E-R123F



R14I-N24T-A63K-
4.35



R123F-D184T



R14I-N24T-A64K-
6.54



T86K-T116E-R123F



R14I-N24TS76N-A93H-
7.43



R127K-R159K-I181Q



R14I-N24TS76V-A93S-
1.78



R127K-R159K-I181K



R14I-N67AS76N-
4.59



A93H-R127K-R159K-



I181Q



R14I-N67LS76N-A93H-
2.71



R127K-R159K-I181Q



R14I-N67SS76N-A93H-
4.32



R127K-R159K-I181Q



R14I-R35D-A64K-
5.72



T86K-T116E-R123F



R14I-R35D-S76N-
9.45



A93H-R127K-R159K-



I181Q



R14I-R35E-A63K-
3.50



R123F-D184T



R14I-R35E-A64K-
6.08



T86K-T116E-R123F



R14I-R35E-S76N-
9.00



A93H-R127K-R159K-



I181Q



R14I-R35E-S76V-
5.22



A93S-R127K-R159K-



I181K



R14I-R35K-A63K-
3.10



R123F-D184T



R14I-S76N-A93H-
8.54



R127K-R159E-I181Q




R14I-S76N-A93H-
7.56



R127K-R159F-I181Q




R14I-S76N-A93H-
9.01



R127K-R159N-I181Q




R14I-S76N-A93H-
9.11



R127Q-R159K-I181Q




R14I-S76N-A93H-
6.88



R127Y-R159K-I181Q




R14I-S76N-G78D-
5.55



A93H-R127K-R159K-




I181Q




R14I-S76V-A93S-
1.82



R127K-R159F-I181K




R14I-S76V-A93S-
2.00



R127K-R159N-I181K




R14I-S76V-A93S-
2.59



R127Q-R159K-I181K




R14I-S76V-A93S-
1.63



R127Y-R159K-I181K




R14M-G54D-S76N-
7.52



A93G-R127K-R159K-




I181K




R14M-N24A-S76N-
1.38



A93G-R127K-R159K-




I181K




R14M-N24E-S76N-
7.17



A93G-R127K-R159K-




I181K



R14M-N24Q-S76N-
3.58



A93G-R127K-R159K-



I181K



R14M-N24T-S76N-
5.57



A93G-R127K-R159K-



I181K



R14M-N67S-S76N-
1.53



A93G-R127K-R159K-



I181K



R14M-R35D-S76N-
8.65



A93G-R127K-R159K-



I181K



R14M-R35E-S76N-
9.25



A93G-R127K-R159K-



I181K



R14M-S76N-A93G-
6.89



R127K-R159E-I181K



R14M-S76N-A93G-
5.14



R127K-R159F-I181K



R14M-S76N-A93G-
6.71



R127K-R159N-I181K



R14M-S76N-A93G-
5.85



R127Q-R159K-I181K



R14M-S76N-A93G-
4.75



R127Y-R159K-I181K



R14M-S76N-G78D-
2.13



A93G-R127K-R159K-



I181K










As indicated by these results, numerous multiply-substituted variants performed better than the wild-type ASP in this assay system.
Example 9
Stain Removal Performance of Multiply-Substituted Mutants
In these experiments, the protocol used is described in Example 1, above. The following table provides the variants, including the mutations in each variant for those with activity greater than wild-type plus one standard deviation (>1.1 Performance Index [PI]). As indicated by these results, numerous multiply-substituted variants performed better than the wild-type ASP in this assay system.







TABLE 9-1







Wash Performance


Results











BMI LVJ1




Detergent



Variant
[Perf. Ind]














N24F-R159G
1.24



N24F-R159L-R123V
1.22



N24I-R127S
1.15



N24L-R159S
1.14



N24S-R159A
1.41



N24V-R159L
1.34



N24Y-R159F
1.14



R14A-N24K-R127S
1.32



R14A-R159W
1.12



R14L-N24Y
1.32



R14L-R159G
1.22



R14L-R159S
1.11



R14L-T109M
1.14



R14L-T39P
1.26



R14M-R159W
1.18



R14S-N24V
1.34



R14S-N24Y
1.32



R14T-N24A
1.16



R14V-N24G-P189S
1.23



R14V-R159W
1.17



R127A-R159K
1.23



R14I-G65Q
1.32



R14I-S76V
1.27



R14I-G65Q-N67L-
1.11



R159K



R14I-G65Q-R159K
1.32



R14I-S76V
1.48










In additional experiments using liquid detergent, the following results were obtained. The variants indicated in the following table exhibited activity greater than wild-type plus one standard deviation (>1.1 Performance Index), as shown in the following Tables.







TABLE 9-2







Wash Performance Results


for LVJ-1











BMI LVJ-1




Detergent



Variants
[Perf.Ind.]














R35F R159Q
1.13



R16Q R79T
1.31



R16Q R35F
1.10



R16Q R159Q
1.17



R14L R79T
1.45



R123L R159Q
1.16



G12D-S15E
1.23



G12D-R35H
1.46



G12D-R35D
1.13

















TABLE 9-3







Wash Performance Results


for TIDE ® 2005











BMI Tide2005




Detergent



Variant
[Perf. Ind]














N024E-G049A-
1.23



A093H--R127K-




A143N-R159K-I181Q




N024H-S076A-
1.11



A093S-S099A-




R127K-R159K-




G054H-L069H




N024H-S076A-
1.16



A093T-S099G-




R127K-R159K




N024L-S076V-
1.11



A093S-S099A-




R127K-R159K




N024Q-G049A-
1.13



A093S-S099A-




R127K-A143N-




R159K-I181T




N024T-G049A-
1.13



A093S-S099A-




R127K-A143N-




R159K-I181T




N24E-G54Q-A93S-
1.17



R127K-R159K




N24H-A93H-R127K-
1.14



R159K




N24H-G54L-S76V-
1.28



A93H-R127K-R159K



N24L-G54Q-S76A-
1.13



A93H-R127K-R159K



N24M-A93G-R127K-
1.10



R159K



N24M-G54E-A93H-
1.15



R127K-R159K



N24M-S76V-A93H-
1.29



R127K-R159K



N24Q-G54Q-S76T-
1.11



A93H-R127K-R159K



N24Q-S76A-A93G-
1.13



R127K-R159K



N24T-G54Q-S76N-
1.14



A93G-R127K-R159K



N24T-S76I-R127K-
1.12



R159K



N24W-G54D-A93H-
1.20



R127K-R159K



N24W-S76A-A93H-
1.14



R127K-R159K



N24W-S76T-A93G-
1.12



R127K-R159K



N24W-S76V-A93G-
1.12



R127K-R159K



N24W-S76Y-A93G-
1.22



R127K-R159K




R014I-S076A-A093G-
1.22



R127K-R159K-I181T




R014I-S076A-A093H-
1.23



R127K-R159K-I181K




R014I-S076A-A093H-
1.14



R127K-R159K-I181Q




R014I-S076A-A093H-
1.15



R127K-R159K-I181T




R014I-S076D-A093S-
1.10



R127K-R159K-I181T




R014I-S076E-A093T-
1.28



R127K-R159K-I181K




R014I-S076N-A093H-
1.26



R127K-R159K-I181Q




R014I-S076V-A093H-
1.22



R127K-R159K-I181Q




R014I-S076V-A093S-
1.27



R127K-R159K-I181K




R014K-S076A-
1.21



A093S-R127K-




R159K-I181T




R014K-S076E-
1.19



A093H-R127K-




R159K-I181K




R014K-S076I-A093S-
1.14



R127K-R159K-I181T




R014K-S076T-
1.11



A093H-R127K-




R159K-I181K




R014K-S076T-
1.23



A093H-R127K-




R159K-I181T




R014K-S076V-
1.11



A093H-R127K-




R159K-I181K




R014L-S076A-
1.34



A093H-R127K-




R159K




R014L-S076A-
1.13



A093H-R127K-



R159K-I181Q



R014L-S076D-
1.17



A093H-R127K-



R159K-I181T



R014L-S076E-
1.23



A093H-R127K-



R159K-I181K



R014M-S076A-
1.25



A093G-R127K-



R159K-I181K



R014M-S076A-
1.12



A093G-R127K-



R159K-I181T



R014M-S076A-
1.18



A093H-R127K-



R159K-I181T



R014M-S076A-
1.46



A093S-R127K-



R159K-I181K



R014M-S076A-
1.17



A093S-R127K-



R159K-I181T



R014M-S076A-
1.11



A093T-R127K-



R159K-I181Q



R014M-S076I-
1.30



A093H-R127K-



R159K-I181T



R014M-S076I-A093S-
1.23



R127K-R159K-I181T



R014M-S076N-
1.23



A093G-R127K-



R159K-I181K



R014M-S076N-
1.24



A093G-R127K-



R159K-I181T



R014M-S076N-
1.39



A093H-R127K-



R159K-I181T



R014M-S076N-
1.28



A093S-R127K-




R159K-I181T




R014M-S076T-
1.28



A093H-R127K-




R159K-I181K




R014M-S076V-
1.17



A093G-R127K-




R159K-I181Q




R014M-S076W-
1.14



A093H-R127K-




R159K-I181K




R014M-S076Y-
1.29



A093H-R127K-



R159K-I181K



R014M-S076Y-
1.14



A093H-R127K-



R159K-I181T



G012D-R035E-
1.13



D184N



G012D-R035E-
1.24



N067K










In further experiments, the following results were obtained. In these experiments, the variants were compared to 0.5 ppm wild-type ASP as a reference. The results in the following table are provided for variants that had activities greater than wild-type plus one standard deviation (>1.1 Performance Index).







TABLE 9-4







Wash Performance Results for


TIDE ® SNOW A Detergent











BMI TIDE-SNOWA



Variant
Detergent [Perf. ind]














R14I-A64K-R123F-
1.27



R159F-D184T




R14I-A64K-R123F-
1.45



R159F-D184T




R14I-N24Q-A64K-
1.38



G78D-R123F-




R159K-D184T




R14I-N24Q-A64K-
1.34



N67S-R123F-




R159F-D184T




R14I-N24Q-A64K-
1.40



N67A-R123F-




R159K-D184T




R14I-N24A-A64K-
1.31



N67S-G78D-



R123F-R159K-



D184T



R14I-A64K-R123F-
1.45



D184T



R14I-N24A-A64K-
1.47



R123F-R159N-



D184T



R14I-N24Q-R35D-
1.23



A64K-N67S-



R123F-R159K-



D184T



R14I-N24Q-A64K-
1.45



N67A-R123F-



R159K-D184T




R14I-N24E-A64K-
1.23



R123F-R127K-




R159K-D184T




R14I-N24A-A64K-
1.65



R123F-D184T




R14I-A64K-R123F-
1.48



R127K-R159F-




D184T




R14I-A64K-R123F-
1.38



R159N-D184T




R14I-A64K-R123F-
1.66



R159K-D184T




R14I-A64K-R123F-
1.11



R127Y-R159K-




D184T




R14I-N24Q-A64K-
1.25



R123F-R127Q-




R159K-D184T



R14I-A64K-R123F-
1.55



R159K-D184T



R14I-N24Q-R35D-
1.22



A64K-N67S-



R123F-R159K-



D184T



R14I-A64K-N67S-
1.48



G78D-R123F-



R127K-R159K-



D184T



R14I-N24Q-A64K-
1.67



N67A-R123F-



R127K-R159K-



D184T



R127K-R159K
1.53



N24A-N67S-R159K
1.55



N24A-N67A-
1.58



R159K










In additional experiments, the following results were obtained. The variants indicated in the following table exhibited activity greater than wild-type plus one standard deviation (>1.1 Performance Index).







TABLE 9-5







Wash Performance Results for


TIDE ®-SNOW











BMI TIDE-SNOW




Detergent [Perf.



Variant
Ind]














R14I-A63K-G78D-R123F-
1.39



D184T




R14I-A63K-N67A-R123F-
1.50



D184T




R14I-A63K-N67L-R123F-
1.23



D184T




R14I-A63K-N67S-R123F-
1.48



R14I-A63K-R123F-R159F-
1.75



D184T



R14I-A63K-R123F-R159K-
1.70



D184T



R14I-A63K-R123F-R159N-
1.67



D184T



R14I-A63K-R123K-D184T
1.40



R14I-A63K-R123Q-D184T
1.44



R14I-A63K-R123Y-D184T
1.25



R14I-A64K-G78D-T86K-
1.26



T116E-R123F




R14I-A64K-N67A-T86K-
1.66



T116E-R123F




R14I-A64K-N67L-T86K-
1.19



T116E-R123F




R14I-A64K-T86K-T116E-
1.54



R123F-R159K




R14I-A64K-T86K-T116E-
1.70



R123K




R14I-G54D-A63K-R123F-
1.13



D184T




R14I-G54D-A64K-T86K-
1.11



T116E-R123F




R14I-N24A-A63K-R123F-
1.47



D184T




R14I-N24A-A64K-T86K-
1.56



T116E-R123F




R14I-N24A-S76V-A93S-
1.15



R127K-R159K-I181K




R14I-N24E-A63K-R123F-
1.36



D184T




R14I-N24E-A64K-T86K-
1.26



T116E-R123F




R14I-N24Q-A63K-R123F-
1.47



D184T




R14I-N24Q-A64K-T86K-
1.57



T116E-R123F



R14I-N24Q-S76V-A93S-
1.43



R127K-R159K-I181K



R14I-N24T-A63K-R123F-
1.57



D184T



R14I-N24T-A64K-T86K-
1.38



T116E-R123F



R14I-N24TS76V-A93S-
1.13



R127K-R159K-I181K



R14I-N67SS76N-A93H-
1.17



R127K-R159K-I181Q



R14I-R35E-A63K-R123F-
1.55



D184T



R14I-R35K-A63K-R123F-
1.20



D184T



R14I-S76V-A93S-R127K-
1.12



R159F-I181K



R14I-S76V-A93S-R127K-
1.31



R159N-I181K



R14I-S76V-A93S-R127Y-
1.30



R159K-I181K



R14M-N24T-S76N-A93G-
1.11



R127K-R159K-I181K



R14M-N67S-S76N-A93G-
1.22



R127K-R159K-I181K



R14M-S76N-A93G-R127K-
1.41



R159F-I181K



R14M-S76N-G78D-A93G-
1.20



R127K-R159K-I181K










Example 10
Stain Removal Performance of Multiply-Substituted Mutants
In this Example, experiments conducted to determine the stain removal ability of various multiply-substituted ASP variants are described. In these experiments, the following protocols and materials were used.
First, 105 ppm water ( ̃6 gpg) was prepared by first preparing a 10,000 ppm stock solution (3/1 Ca+2/Mg+2) by dissolving 11.020 g/L calcium chloride dehydrate (CaCl2.2H2O) MW 147.01 g/mol and 5.08 g/L magnesium chloride hexahydrate (MgCl2.6H2O) MW 203.3 g/mol in 1000 ml deionized water. The 105 ppm solution was prepared by diluting 10.50 ml of the 10,000-ppm stock with 989.50 ml deionized water.
A TIDE®E 2005 detergent solution (1.6 gm/L) was prepared in the 105 ppm water by dissolving 11.2 gm TIDE®-2005 in 7 liters of 105 ppm water.
Blood-Milk-Ink (BMI) soiled swatches EMPA 116 (11×8 cm), EMPA117 (11×8 cm) both from EMPA Testmaterialien AG and grass soiled swatches EMPA164 (10×7.5 cm) from EMPA Testmaterialien AG and Equest grass medium soiled (10×7.5 cm) from Warwick Equest Limited used in these experiments were numbered using a waterproof pen (on the soiled sides). The soiled sides of the swatches were measured using Tristimulus Minolta Meter CR-300 (Minolta), and analyzed using the equation L (L*a*b), D65 Std. Illuminate, on a white background. Three readings were made per swatch. As grass stains are very sensitive to light, grass-soiled swatches were covered and stored in the dark until they were used. Every wash performance test was conducted in duplicate.
During the test, extra ballast (more mechanical action) was used. This ballast comprised 2 pieces of 10×10 cm EMPA 221 (unsoiled cotton, EMPA Testmaterialien AG placed in one beaker. These EMPA 221 swatches were not numbered or measured.
The laundry wash performance test was conducted using a 6 pot, bench model Tergotometer (TOM) Model 7243S (United States Testing). The temperature was adjusted 15° C. or 60° F. Half of the inside of the TOM was filled with ice. The wash time was set for 12 minutes. Test beakers were filled with 1 liter of the detergent solution (made in 105 ppm water, as described above). Once the solutions have reached 15° C. or 60° F., the TOM was started with an agitation of 100 rpm. The variant samples were then added to the mixture as indicated below. As a control, the TIDE® 2005 detergent solution (Procter & Gamble) without any added enzyme sample was used. The variants were tested at two different concentrations (i.e., at 0.55 ppm and at 2.75 ppm).
Six swatches (with the same soils) were added to each beaker one at a time. In addition, 2 EMPA 221 swatches were added. For example: for BMI soiled swatches 3 EMPA 116 and 3 EMPA117+2 EMPA 221 (total weight is approximately 13.25 gram), or, for grass soiled swatches 3 EMPA 164 and 3 Equest grass medium soiled+2 EMPA 221 (total weight is approximately 13.22 gram). The wash time was then reset on 12 minutes. After 12 minutes of washing, all of the EMPA 116 and EMPA 117 swatches were rinsed in a bucket and all the grass swatches were rinsed a separate bucket for 3 minutes under cold running tap water. The EMPA 221 swatches were then discarded. The swatches were placed in a spin-dryer for 2 minutes (the EMPA 116 and the EMPA 117 swatches were dried separately from the grass stained-swatches). Subsequently, the grass-stained swatches were dried in the air, without light or ironing., whereas the EMPA 116 and EMPA 117 swatches were dried by ironing.
After drying, the soiled sides of the swatches were evaluated using the Tristimulus Minolta Meter CR-300 with equation L (L*a*b), D65 Std. Illuminate, on a white background, 3 readings per swatch. The percent soil removal was calculated using the equation:

% Soil Removal=(L value after washing−L value before washing)/(L0 white cotton−L value before washing)×100%

In order to obtain a measure for the stain removal of each individual variant the delta percentage of soil removal was then calculated by subtracting the percentage of soil removal obtained by the TIDE® 2005 detergent solution without any variant from the percentage of soil removal in the presence of each variant (delta % SR). The results are shown in Table 10.1
In additional experiments, the stain removal abilities of various multiply-substituted ASP variants were tested. The test conditions as described above were used with the following modifications. In these tests a TIDE®2005 SNOW detergent solution (1.5 gm/L) was prepared in the 105 ppm water by, dissolving 37.5 gm TIDE®2005 SNOW in 25 liters of 105 ppm water. Furthermore, the EMPA 116 BMI soiled swatches were cut into pieces of 10×7.5 cm. The EMPA 117 swatches were replaced by EMPA 116 Fixed swatches (CFT) and also cut into pieces of 10×7.5 cm. No EMPA 164 swatches were used in these experiments. The variants were tested at one concentration of 0.55 ppm. Six swatches (i.e. 6 EMPA 116, or 6 EMPA 116 fixed or 6 Equest) were added to each beaker one at a time. In addition, 2 EMPA 221 swatches were added. As a control, TIDE® 2005 SNOW detergent solution (Procter & Gamble), without any added enzyme sample was used. Every wash performance test was conducted in











TABLE 10.1






EMPA 116
EMPA 117
Equest Grass
EMPA 164



Δ % S.R.
Δ % S.R.
Δ % S.R.
Δ % S.R.


Variants/Dosage
(n = 6)
(n = 6)
(n = 6)
(n = 6)







ASP/0.55 ppm
5.2 ± 1.2
 4.9 ± 2.4
−4.3 ± 4.3  
1.5 ± 1.1


ASP/2.75 ppm
9.7 ± 1.4
10.7 ± 2.8
−1.8 ± 5.4  
3.1 ± 1.6


R123L-R127Q-R179Q/0.55 ppm
6.0 ± 1.5
 8.5 ± 2.1
1.7 ± 3.7
2.1 ± 1.2


R123L-R127Q-R179Q/2.75 ppm
11.3 ± 1.5 
14.0 ± 2.7
1.1 ± 5.0
5.4 ± 1.4


G12D-R35H/0.55 ppm
7.0 ± 1.1
 7.9 ± 1.9
−2.2 ± 5.0  
2.5 ± 1.3


G12D-R35H/2.75 ppm
10.1 ± 1.7 
14.4 ± 1.9
3.2 ± 3.8
4.5 ± 1.0


G12D-R35E/0.55 ppm
8.2 ± 1.2
10.0 ± 2.1
1.3 ± 5.4
2.9 ± 1.4


G12D-R35E/2.75 ppm
10.6 ± 1.4 
16.6 ± 2.1
4.3 ± 4.2
5.4 ± 1.4


R35E-R123L-R127Q-R179Q/0.55 ppm
6.1 ± 1.2
 6.8 ± 2.1
0.4 ± 4.1
1.0 ± 1.4


R35E-R123L-R127Q-R179Q/2.75 ppm
8.8 ± 2.1
12.7 ± 1.8 
4.7 ± 4.3
1.7 ± 1.4









quadruplicate. The results (average delta % SR, Standard deviation (STD) and number of replicates (n)) are shown in FIG. 6.

In another set of experiments, the stain removal ability of numerous multiply-substituted ASP variants, were tested. The test conditions as described above were used with the following modifications. In these tests, a TIDE®2005 SNOW detergent solution (1.5 gm/L) containing HEPES buffer was prepared in the 105 ppm water by dissolving 37.5 gm TIDE® 2005 SNOW in 25 liters of 105 ppm water. Then, 30 g Hepes (=5 mM; C8H18N2O4S), was added, the solution was stirred, and the pH adjusted to 7.8 with ±19 ml 4N NaOH. It was noted that this solution can be stored for 36 hours at room temperature. In these tests, only EMPA 116 BMI soiled swatches of 10×7.5 cm and Equest grass medium soiled swatches of 10×7.5 cm were used. The variants were tested at one concentration of 0.55 ppm. Six swatches (either 6 EMPA 116, or 6 Equest grass medium soiled) were added to each beaker one at a time. In addition, 2 EMPA 221 swatches were added. As a control, TIDE® 2005 SNOW detergent solution (Procter & Gamble) with HEPES buffer, without any added enzyme sample was used. Every wash performance test was conducted in quadruplicate. The results (average D % SR, Standard deviation (STD) and number of replicates (n)) are shown in FIG. 7.
As indicated by these results, numerous multiply-substituted variants performed better than the wild-type ASP in this assay system.
Example 11
Stain Removal Performance of Multiply-Substituted Mutants Tested at Low pH
In this Example, experiments conducted to determine the stain removal performance of various multiply-substituted ASP variants are described. In these experiments, the protocol used is described in Example 1, above. The following table provides the variants, including the mutations in each variant for those with activity greater than that of wild-type ASP plus 1 standard deviation (1.1 Performance Index).







TABLE 11-1







Stain Removal Performance


at Low pH











BMI Low pH [Perf.



Variant
ind]














G54E-R14L
1.40



N24D-R127Y-
1.61



R159V




N24E-R127S
1.43



N24E-R159C
1.14



N24F-R159G
1.42



N24F-R159G-G54E
1.98



N24F-R159L-R123V
1.61



N24G-R127Y
1.34



N24H-R159Y-T46I
1.34



N24I-R127S
1.21



N24I-R127V-R14V
1.12



N24L-R159S
1.37



N24S-R159A
2.48



N24V-R127M-
1.33



R159V




N24V-R127S-R159H
1.60



N24V-R159L
1.41



N24Y-G54A
1.11



N24Y-R127L
1.37



N24Y-R127S
1.14



N24Y-R127V
1.22



N24Y-R159F
1.29



R127A-R159F
1.12



R127H-R159Q
1.78



R127H-R159T-
1.66



S185F




R127M-R159V
1.70



R127S-R159G
1.21



R127S-R159L
1.27



R127T-R159F
1.28



R127V-R159G
1.36



R127Y-R159L
2.14



R14A-N24K-R127S
1.41



R14A-R127Y-
1.17



R159W



R14G-N24S-R127C
1.10



R14G-R127G
1.17



R14L-N24D
1.73



R14L-N24Y
1.19



R14L-R123L
2.11



R14L-R127S
1.47



R14L-R127V
1.18



R14L-R127Y
1.78



R14L-R159G
1.51



R14L-R159S
1.52



R14L-T39P
1.50



R14M-N24L-R159S-
1.15



R123V



R14M-R159F
1.18



R14M-R159W
1.36



R14Q-R123F
1.58



R14S-N24E-R127W
1.31



R14S-N24V
1.11



R14S-N24Y
1.12



R14T-N24T-R127Q
1.38



R14T-R127Y
1.98



R14V-N24D-R127C
1.28



R14V-N24G-P189S
1.14



R14V-N24L-R127F
1.14



R14V-R127A
1.55



R14V-R159F
1.43



R14V-R159W
1.24



R14W-N24A
1.10



R14W-R123L
1.19



R14W-R123V
1.40



R14W-R159V
1.15



R159V-G49D
1.67



R159V-R123G
1.20



N024E-G049A-
1.29



A093H-R127K-




A143N-R159K-




I181Q




N024E-G049A-
1.11



A093S-S099D-




R127K-A143N-




R159K-I181Q




N024Q-G049A-
1.12



A093S-S099A-




R127K-A143N-




R159K-I181T




N24A-G54E-S76D-
1.41



A93G-R127K-




R159K




N24E-A93G-R127K-
1.32



R159K




N24E-G54L-S76E-
1.15



A93G-R127K-




R159K




N24E-G54Q-A93S-
1.46



R127K-R159K




N24E-S76D-A93T-
1.35



R127K-R159K




N24H-G54E-A93G-
1.10



R127K-R159K




N24L-S76T-A93G-
1.24



R127K-R159K



N24M-A93S-R127K-
1.23



R159K



N24M-A93T-R127K-
1.18



R159K



N24M-G54E-A93H-
1.35



R127K-R159K



N24M-G54E-S76N-
1.36



A93S-R127K-R159K



N24M-S76V-A93H-
1.16



R127K-R159K



N24Q-A93G-R127K-
1.10



R159K



N24Q-G54D-S76L-
1.11



A93G-R127K-



R159K



N24Q-G54I-S76T-
1.10



A93G-R127K-



R159K



N24Q-G54Q-A93G-
1.10



R127K-R159K



N24Q-S76A-A93G-
1.12



R127K-R159K



N24T-G54Q-S76N-
1.19



A93G-R127K-



R159K



N24T-G54Q-S76V-
1.20



R127K-R159K



N24T-S76I-R127K-
1.14



R159K



N24W-A93G-
1.20



R127K-R159K



N24W-G54D-A93H-
1.21



R127K-R159K



R014I-S076A-
1.21



A093G-R127K-



R159K-I181T



R014I-S076A-
1.16



A093H-R127K-



R159K-I181Q



R014I-S076D-
1.10



A093H-R127K-




R159K-I181Q




R014I-S076D-
1.27



A093H-R127K-




R159K-I181T




R014I-S076D-
1.31



A093S-R127K-




R159K-I181T




R014I-S076E-
1.46



A093S-R127K-




R159K-I181Q




R014I-S076E-
1.20



A093T-R127K-




R159K-I181K




R014I-S076N-
1.13



A093H-R127K-




R159K-I181Q




R014L-S076A-
1.21



A093H-R127K-




R159K




R014L-S076A-
1.15



A093H-R127K-




R159K-I181Q




R014L-S076D-
1.16



A093H-R127K-




R159K-I181T




R014M-S076A-
1.30



A093G-R127K-




R159K-I181T




R014M-S076A-
1.35



A093S-R127K-



R159K-I181K



R014M-S076A-
1.15



A093S-R127K-



R159K-I181T



R014M-S076A-
1.28



A093T-R127K-



R159K-I181Q



R014M-S076D-
1.31



A093S-R127K-



R159K-I181T



R014M-S076E-
1.12



A093H-R127K-



R159K-I181T



R014M-S076E-
1.16



A093S-R127K-



R159K-I181T



R014M-S076N-
1.12



A093G-R127K-



R159K-I181K



R014M-S076N-
1.19



A093G-R127K-



R159K-I181T



R014M-S076N-
1.15



A093H-R127K-



R159K-I181T



R014M-S076N-
1.32



A093S-R127K-



R159K-I181T










In additional experiments using liquid detergent, the following results were obtained. The variants indicated in the following table exhibited activity greater than wild-type plus one standard deviation (>1.1 Performance Index).







TABLE 11-2







Wash Performance at Low pH











BMI Low pH



Variant
Detergent [Perf.Ind.]







T36S-R127Q-R159E
1.24



S15E-R35E
1.15



S15E-R35D
1.20



S15E-R159E
1.24



S15E-R127Q
1.39



S15E-R123Q
1.22



S15E-R123E
1.38



R79T R127Q R179Q
1.23



R35H-R159E
1.37



R35F R61S R159Q
1.39



R35F R159Q
1.49



R35D-R127Q
1.56



R16Q R79T R159Q
1.42



R179Q



R16Q R79T R123L
1.62



R16Q R79T
1.59



R16Q R35F
1.29



R16Q R159Q R179Q
1.31



R16Q R159Q
1.26



R14Q-T121E
1.37



R14Q-R35E
1.36



R14Q-R35D
1.27



R14Q-R123Q
1.33



R14L R79T
1.59



R127Q-R159E
1.34



R127Q R159Q
1.45



R123Q-R159E
1.51



R123L R159Q
1.58



R123F-R159E
1.77



G12D-S15E
1.71



G12D-R35H-R159E
1.74



G12D-R35H-R123Q
1.89



G12D-R35H
2.38



G12D-R35E
1.85



G12D-R35D
1.68



G12D-R159E
1.32



G12D-R14Q-R35H
1.44



G12D-R14I-R35H
1.54



G65Q-R127A-R159K
1.10



R127A-R159K
1.35



R14I-G65Q
1.38



R14I-G65Q-N67L-
1.14



R159K



R14I-G65Q-R127A-
1.43



R14I-G65Q-R127A-
1.27



R159K



R14I-G65Q-R159K
1.38



R14I-R127A
1.33



R14I-R127A-R159K
1.44



R14I-R159K
1.32



R14I-R35F
1.13



R14I-R35F-G65Q
1.16



R14I-R35F-R159K
1.28



R14I-S76V
1.40



R35F-R127A-R159K
1.17










As indicated by these results, numerous multiply-substituted variants performed better than the wild-type ASP in this assay system.
Example 12
Cleaning Performance of ASP Variants in Automatic Dishwashing
In this Example, experiments conducted to determine the cleaning performance of ASP variants in Automatic Dish Washing (ADW) TABLET ACTION PACK® detergent in comparison with a benchmark serine protease (“Protease B”) on protease-sensitive stains described. As shown in the Table below, ASP variants removes stains much better than protease B.
A micro-washing test with 24 well plates was performed. Stainless steel disks were punched out using a hammer and punch. The disks were cleaned and weighed, in order to obtain initial weights. Egg stains were prepared as described below (“Scrambled Egg Preparation” and “Egg Yolk Preparation”). Then, 50 uL of prepared egg were dispensed onto each disk. The preparations were allowed to dry at room temperature for 30 minutes, then were baked in an oven at 80° C. for 2 hours. The disks were cooled to room temperature. After soiling, the disks were weighed in order to obtain the soiled weights of the disks. The soiled disks were inserted into NUNCLON® 24 well polystyrene plate. Auto dish washing product solution was prepared by thoroughly mixing the appropriate amount of ADW without enzyme product (e.g., Powder 4500 ppm) into IL of 11 gpg water at 40° C. Hardness solution was prepared by mixing 188.57 g CaCl2.2H2O and 86.92 g MgCl2.6H2O into 1 L DI water. In the test, 2 mL of pre-warmed ADW solution were added at 55° C. to each well. The appropriate amount of enzyme was then to each well. In some embodiments, the tests were run using six across, with four duplicates, while in other embodiments, the test were run four across with six duplicates. The plates were then sealed with film. The plates were placed in a pre-warmed incubator/shaker and secured with flask clamps. Plates were washed for 30 minutes at an appropriate temperature (e.g., 55° C. for European wash conditions), at 180 RPM. After washing, the plates were carefully rinsed by dipping them in a warm water bath three times. The disks were removed from the plates and dried in an oven for 1 hour at 80° C. Once dry, the disks were weighed, in order to obtain the washed disk weights. The gravimetric evaluation resulting in approximate percent removal was calculated as follows:

% Removal=(soiled weight−washed weight)/(soiled weight−clean weight)×100

Removal Index=% Removal/% Removal by Benchmark Protease(Protease B)

Scrambled Egg Preparation

Eggs for use in the testing of the protease and/or detergent compositions comprising test enzyme(s) were prepared as follows. First, 100 mls of 10% fat milk were mixed with 3 whole eggs. This mixture was cooked with continuous stirring until the mixture was slightly runny. Then, an additional 40 ml milk were added and the mixture was blended with a hand mixture or blender on high until smooth, with no signs of lumps. The egg mixture was allowed to cool to room temperature before soiling.
Egg Yolk Preparation
A water bath was heated by setting the temperature probe on the hot plate to 60° C. A pulp strainer was placed over a beaker. To prepare the egg yolks, 6-9 yolks were cracked and the yolks separated from the whites. The yolk sacs were not broken, although any residue present on the yolks was removed. The yolks were gently rinsed in cold water. The yolks were gently broken over the strainer and beaker. Once all of the yolks have been strained, the beaker containing the strained yolks was placed in the water bath. The yolks were stirred for 30 minutes, at 60° C. The yolks were removed from the water bath and placed in a cool water bath for 30 minutes. Any skin that formed on the surface was gently removed.
Preparation of Egg Stains Using Stainless Steel Slides (1×3 Inch)
Each metal slide was dipped into the scrambled egg or egg yolk preparation (prepared as described above) and tapped once, ensuring that there was approximately the same amount of egg on each slide. The backs of the slides were wiped on a tissue to clean them. The slides were then placed on two oven racks in numerical order. The slides were left to dry for 30 minutes at room temperature. The slides were then cooked for 2 hours at 80° C. (+/−1° C.), with the upper and lower shelves being exchanged and rotated by 180° (+/−1° C.) after 1 hour. The cooled, soiled slides were weighed in order 1-96.
For washing, eight stained slides were placed both in top rack and bottom rack of the washing machine. Pre-wash and main wash was based on Whirlpool 840 cup capacity of 40 mls for pre-wash and 60 mls for main wash. Typically in one test, four products were run using four GE 500 machines. For the test cycle, soiled slides were loaded into the machines and test product placed in the pre-wash and main wash cups. The water temperature was set to 120° F. and the machines turned on the normal wash cycle. The slides were removed from the machines for weighting at the end of the final rinse cycle. The slides did not go through the dry cycle. By the end of the fourth repetition, each product was run once in each machine. All four repetitions were run in one day. The next day, this same procedure was repeated using new soiled substrates, to provide a total of 8 repetitions per product, which were then averaged for the final results. The gravimetric evaluation resulting in approximated percent removal was calculated as follows:

% Removal=(soiled weight−washed weight)/(soiled weight−clean weight)×100

Removal Index=% Removal/% Removal by Benchmark Protease(Protease B)

The results of these performance tests are provided below in Table 12-1:







TABLE 12-1







Stain Removal Index vs. Protease B in 24 Well Screening










On Scrambled
On Egg


Enzyme
Egg
Yolk





WT ASP
101
100


R14N-R127K-R159L
134
120


R14I-A64K-T86K-N112E-R123F-D184T
126
124


G12D-R35E-G63R-R79K-T109M
124
113


R14L
128
123


G12D-R35E
120
138


R14M-S76D-A93H-R127K-R159K-I181K
123
103









Example 13
Cleaning Performance of ASP Variants in Powder Laundry Detergent
In this Example, experiments conducted to determine the cleaning performance of ASP variants in laundry powder detergent ARIEL® are described. In these experiments, the performance of the variants was compared with a benchmark serine protease (e.g., “Protease C”) on Real Item Cleaning (RIC).
The tests are conducted using Meile washing machines using the following conditions: temperature 40-C, hardness 21 gpg, detergent 7300 ppm, protease 0.88 ppm, R10.75 kg, total ballast and RI 2.5 kg, water 13 L, wash time of 20 minutes, rinse time of 3×5 minutes.
In these experiments, king and queen size sheets, and clean socks (J&R Coordinating Service) are quartered for clean ballast. In addition, Consumer Real Items (R1) are tested, including socks, t-shirts, pillowcases, towels, and tea towels. Soils comprising yeast and AS1 (Artificial Soil 1; Equest) are used in these experiments. The composition of AS1 is provided below in Table 13-1.







TABLE 13-1







Composition of AS1










Component
%














Artificial Sebum
14.5



Tea (PG Tips)
6.5



Coffee (Nescafe)
4.0



Orange Juice
12.0



Tomato Sauce (Heinz)
13.0



Grass
4.5



Chocolate (Heinz Baby)
7.5



Burnt Butter
2.5



Cooking Oil
14.0



ETC Clay
5.0



NTC Clay
5.0



Hoover Dust
4.0



Make up
7.5










The garments are cut so as to ensure equal garment size for testing, with garments selected for uniform soil level. The two halves are coded in paneling pair order (e.g., left/right of garment).

















Garment 1
Garment 2
Garment 3
Garment 4
Garment 5
Garment 6
Garment 7
Garment 8







A B
B A
B A
A B
B A
A B
A B
B A









Garments labeled “A” are washed with ASP variant, while Garments labeled “B” are washed with Protease C. The tests were conducted 4×4×2 (each treatment is repeated in four machines with two internal replicates of R1).
Test Procedure
Ballast of clean quartered bed sheets and R1 are combined to make a total load weight of 2.5 kg and readied to be loaded into a manual Meile washing machine, with the “21gpg” spout on the front panel turned on. The washer is then turned on. The temperature is set to 40° C. and for the short wash cycle. Next, the ballast and R1 are added to the washing machine. In addition, 20 g AS1 and clean socks stained with 17 g Bakers yeast are added to each replicate. Then, detergent (95 g) is added to detergent tray in the machine and the cycle started. Once the detergent is flushed from the tray, any liquids to be added are added. The machine then runs through its cycles. When the washing cycle is completed, the contents are transferred to a dryer and dried for 30 minutes. The items are then visually graded to provide PSU results and preference numbers in the LSG program.
Test Grading
The whole tests are graded in a single session within 72 hrs of washing and drying the test items. The split item garments are laid out in the panel room and graded by at least 3 judges using the Scheffé scale. Additionally, the stains A vs B are graded by at least 2 judges.
Results Handling
Grades are entered into a hand-held Psion set up with the wash test software. When grading of all split items has been completed, the data are transferred into a personal computer where the average PSU grade, % preference between A and B treatments, and LSD for each garment are calculated. Significant differences between products are calculated to a confidence limit of 90%.
The PSU grading systems are used to compare two products (formulae). The two formulae are tested on performance (e.g., post wash stain residuals). In these experiments several fabrics, washed with both products (e.g., product A and product B), are compared. Two or more judges perform the grading, in which the following Schelle scale is used:
0: No preference
1: I think this product is a little better (unsure)
2: I know this product is a little better
3: This product is better
4: This product is much better
Example 14
Storage Stability of ASP Variants
In this Example, experiments conducted to determine the storage stability of various ASP variants tested in liquid TIDE® detergent in comparison with WT ASP are described. The protease activity of the variants and WT ASP were tested using a Hitachi 911 Automatic Analyzer. In these tests succinyl-L-Ala-L-Pro-L-Phe-p-nitroanilide's (pNA) was used to as the substrate to assess protease activity. In this test, the terminal carboxylamide bond is cleaved by active protease yielding p-nitroaniline. The intensity of the resultant yellow color, read at 415 nm/450 nm, is proportional to the activity of the protease in the sample which is calibrated with SAVINASE® protease standard.
As indicated in the following Table, there were significant improvements in storage stability of the engineered variants as compared to WT ASP. In this Table, the “Retained Activity %” was determined using the following formula: Retained Activity %=Activity/Initial Activity×100%







TABLE 14-1







Retained Activity in 28 Days Storage in Liquid TIDE ® at 90° F.

















4
7






Initial
1 Day
Days
Days
14 Days
21 Days
28 Days


















WT ASP
100%
91%
32%
0
0
0
0


R18
100%
99%
41%
0
0
0
0


G12D-R35H
100%
100%
100%
100%
97%
92%
87%


G12D-R35E
100%
100%
100%
100%
100%
97%
94%


R35E
100%
100%
100%
96%
87%
79%
72%


R35E-R18
100%
100%
100%
94%
82%
70%
61%


R35D
100%
100%
100%
86%
71%
56%
45%









Example 15
Determination of ASP Cleaning Activity
In this Example, experiments conducted to determine the cleaning activity of ASP under various conditions, as well as the properties of the various wash conditions are described.
There is a wide variety of wash conditions including varying detergent formulations, wash water volume, wash water temperature, and length of wash time. Thus, detergent components such as proteases must be able to tolerate and function under adverse environmental conditions. For example, detergent formulations used in different areas have different concentrations of their relevant components present in the wash water. For example, a European detergent typically has about 3000-8000 ppm of detergent components in the wash water, while a Japanese detergent typically has less than 800 (e.g., 667 ppm) of detergent components in the wash water. In North America, particularly the United States, detergent typically have about 800 to 2000 (e.g., 975 ppm) of detergent components present in the wash water.
Latin American detergents are generally high suds phosphate builder detergents and the range of detergents used in Latin America can fall in both the medium and high detergent concentrations, as they range from 1500 ppm to 6000 ppm of detergent components in the wash water. Brazilian detergents typically has approximately 1500 ppm of detergent components present in the wash water. However, other high suds phosphate builder detergent geographies, not limited to other Latin American countries, may have high detergent concentration systems up to about 6000 ppm of detergent components present in the wash water.
In light of the foregoing, it is evident that concentrations of detergent compositions in typical wash solutions throughout the world varies from less than about 800 ppm of detergent composition (“low detergent concentration geographies”), for example about 667 ppm in Japan, to between about 800 ppm to about 2000 ppm (“medium detergent concentration geographies”), for example about 975 ppm in U.S. and about 1500 ppm in Brazil, to greater than about 2000 ppm (“high detergent concentration geographies”), for example about 3000 ppm to about 8000 ppm in Europe and about 6000 ppm in high suds phosphate builder geographies.
The concentrations of the typical wash solutions are determined empirically. For example, in the U.S., a typical washing machine holds a volume of about 64.4 L of wash solution. Accordingly, in order to obtain a concentration of about 975 ppm of detergent within the wash solution, about 62.79 g of detergent composition must be added to the 64.4 L of wash solution. This amount is the typical amount measured into the wash water by the consumer using the measuring cup provided with the detergent.
As a further example, different geographies use different wash temperatures. The temperature of the wash water in Japan is typically less than that used in Europe. For example, the temperature of the wash water in North America and Japan can be between 10 and 30° C. (e.g., about 20° C.), whereas the temperature of wash water in Europe is typically between 30 and 50° C. (e.g., about 40° C.).
As a further example, different geographies may have different water hardness. Water hardness is typically described as grains per gallon mixed Ca2+/Mg2+. Hardness is a measure of the amount of calcium (Ca2+) and magnesium (Mg2+) in the water. Most water in the United States is hard, but the degree of hardness varies from area to area. Moderately hard (60-120 ppm) to hard (121-181 ppm) water has 60 to 181 parts per million (i.e., parts per million converted to grains per U.S. gallon is ppm # divided by 17.1 equals grains per gallon) of hardness minerals. Table 15-1 provides ranges of water hardness.







TABLE 15-1







Water Hardness Ranges











Water
Grains per Gallon
Parts per Million







Soft
less than 1.0
less than 17



Slightly hard
1.0 to 3.5
17 to 60



Moderately hard
3.5 to 7.0
 60 to 120



Hard
 7.0 to 10.5
120 to 180



Very hard
greater than 10.5
greater than 180










European water hardness is typically greater than 10.5 (e.g., 10.5-20.0) grains per gallon mixed Ca2+/Mg2+ (e.g., about 15 grains per gallon mixed Ca2+/Mg2+). North American water hardness is typically greater than Japanese water hardness, but less than European water hardness. For example, North American water hardness can be between 3 to 10 grains, 3-8 grains or about 6 grains. Japanese water hardness is typically lower than North American water hardness, typically less than 4, for example 3 grains per gallon mixed Ca2+/Mg2+.
The present invention provides protease variants that provide improved wash performance in at least one set of wash conditions and typically in multiple wash conditions.
As described herein, the protease variants are tested for performance in different types of detergent and wash conditions using a microswatch assay (See above, and U.S. patent application Ser. No. 09/554,992; and WO 99/34011, both of which are incorporated by reference herein). Protease variants are tested for other soil substrates also in a similar fashion.
Example 16
Liquid Fabric Cleaning Compositions
This Example provides liquid fabric cleaning compositions that find use in conjunction with the present invention. These compositions are contemplated to find particular utility under Japanese machine wash conditions, as well as for applications involving cleaning of fine and/or delicate fabrics. Table 13-1 provides a suitable composition. However, it is not intended that the present invention be limited to this specific formulation, as many other formulations find use with the present invention.







TABLE 16-1







Liquid Fabric Cleaning


Composition










Component
Amount (%)














AE2.5S
2.16



AS
3.30



N-Cocoyl N-methyl
1.10



glucamine



Nonionic surfactant
10.00



Citric acid
0.40



Fatty acid
0.70



Base
0.85



Monoethanolamine
1.01



1,2-Propanediol
1.92



EtOH
0.24



HXS
2.09



Protease.sup.1
0.01



Amylase
0.06



Minors/inerts to 100%

















TABLE 16-2







Liquid Laundry Detergent Compositions









Detergent Compositions












Component
I
II
III
IV
V















LAS
18.0
—
6.0
—
—


C12-C15 AE1.8S
—
2.0
8.0
11.0
5.0


C8-C10 propyl dimethyl
2.0
2.0
2.0
2.0
1.0


amine


C12-C14 alkyl dimethyl
—
—
—
—
2.0


amine oxide


C12-C15 AS
—
17.0
—
7.0
8.0


CFAA
—
5.0
4.0
4.0
3.0


C12-C14 Fatty alcohol
12.0
6.0
1.0
1.0
1.0


ethoxylate


C12-C18 Fatty acid
11.0
11.0
4.0
4.0
3.0


Citric acid (anhydrous)
5.0
1.0
3.0
3.0
2.0


DETPMP
1.0
1.0
1.0
1.0
0.5


Monoethanolamine
11.0
8.0
5.0
5.0
2.0


Sodium hydroxide
1.0
1.0
2.5
1.0
1.5


Percarbonate
—
3.5
—
2.5
—


Propanediol
12.7
14.5
13.1
10.
8.0


Ethanol
1.8
1.8
4.7
5.4
1.0


Pectin Lyase
—
—
—
0.005
—


Amylase
—
0.002
—
—
—


Cellulase
—
—
0.0002
—
0.0001


Lipase
0.1
—
0.1
—
0.1


Protease A
0.05
0.3
0.055
0.5
0.2


DETBCHD
—
—
0.02
0.01
—


SRP1
0.5
0.5
—
0.3
0.3


Boric acid
2.4
2.4
2.8
2.8
2.4


Sodium xylene sulfonate
—
—
3.0
—
—


DC 3225C
1.0
1.0
1.0
1.0
1.0


2-butyl-octanol
0.03
0.04
0.04
0.03
0.03


DTPA
0.5
0.4
0.35
0.28
0.4


Brightener 1
0.18
0.10
0.11
—
—


ASP Variant
0.05
0.3
0.08
0.5
0.2





Balance to 100% perfume/dye and/or water













TABLE 16-3







Liquid Laundry Detergent Compositions









Detergent Composition













Component
I
I
II
III
IV
V
















LAS
11.5
11.5
9.0
—
4.0
—


C12-C15AE2.85S
—
—
3.0
18.0
—
16.0


C14-C15E2.5 S
11.5
11.5
3.0
—
16.0
—


C12-C13E9
—
—
3.0
2.0
2.0
1.0


C12-C13E7
3.2
3.2
—
—
—
—


CFAA
—
—
—
5.0
—
3.0


TPKFA
2.0
2.0
—
2.0
0.5
2.0


Citric Acid
3.2
3.2
0.5
1.2
2.0
1.2


(Anhydrous)


Ca formate
0.1
0.1
0.06
0.1
—
—


Na formate
0.5
0.5
0.06
0.1
0.05
0.05


Na Culmene
4.0
4.0
1.0
3.0
1.2
—


Sulfonate


Borate
0.6
0.6
—
3.0
2.0
3.0


Na hydroxide
6.0
6.0
2.0
3.5
4.0
3.0


Ethanol
2.0
2.0
1.0
4.0
4.0
3.0


1,2 Propanediol
3.0
3.0
2.0
8.0
8.0
5.0


Mono-
3.0
3.0
1.5
1.0
2.5
1.0


ethanolamine


TEPAE
2.0
2.0
—
1.0
1.0
1.0


PB1

—
4.5
—
2.8
—


Protease A
0.03
0.03
0.01
0.03
0.02
0.02


Lipase
—
—
—
0.002
—
—


Amylase
—
—
—
—
0.002
—


Cellulase
—
—
—
—
—
0.0001


Pectin Lyase
0.005
0.005
—

—
—


ASP Variant
0.03
0.05
0.01
0.03
0.08
0.02


SRP 1
0.2
0.2
—
0.1
—
—


DTPA
—
—
—
0.3
—
—


PVNO
—
—
—
0.3
—
0.2


Brightener 1
0.2
0.2
0.07
0.1
—
—


Silicone antifoam
0.04
0.04
0.02
0.1
0.1
0.1





Balance to 100% perfume/dye, and/or water













TABLE 16-4







Liquid Laundry Detergent Compositions









Composition












Component
I
II
III
IV
V















LAS
24.0
32.0
6.0
8.0
6.0


C12-C15AE1.8S
—
—
8.0
11.0
5.0


C8-C10 propyl dimethyl
2.0
2.0
2.0
2.0
1.0


amine


C12-C14 alkyl dimethyl
—
—
—
—
2.0


amine oxide


C12-C15 AS
—
—
17.0
7.0
8.0


CFAA
—
5.0
4.0
4.0
3.0


C12-C14 Fatty alcohol
12.0
6.0
1.0
1.0
1.0


ethoxylate


C12-C18 Fatty acid
3.0
—
4.0
4.0
3.0


Citric acid (anhydrous)
6.0
5.0
3.0
3.0
2.0


DETPMP
—
—
1.0
1.0
0.5


Monoethanolamine
5.0
5.0
5.0
5.0
2.0


Sodium hydroxide
—
—
2.5
1.0
1.5


1 N HCl aqueous
#1
#1
—
—
—


solution


Propanediol
12.7
14.5
13.1
10.
8.0


Ethanol
1.8
2.4
4.7
5.4
1.0


DTPA
0.5
0.4
0.3
0.4
0.5


Pectin Lyase
—
—
—
0.005
—


Amylase
0.001
0.002
—
—
—


Cellulase
—
—
0.0002
—
0.0001


Lipase
0.1
—
0.1
—
0.1


ASP Variant
0.05
0.3
0.08
0.5
0.2


Protease A
—
—
—
—
0.1


SRP1
0.5
0.5
—
0.3
0.3


Boric acid
2.4
2.4
2.8
2.8
2.4


Sodium xylene sulfonate
—
—
3.0
—
—


DC 3225C
1.0
1.0
1.0
1.0
1.0


2-butyl-octanol
0.03
0.04
0.04
0.03
0.03


Brightener 1
0.12
0.10
0.18
0.08
0.10





Balance to 100% perfume/dye and/or water


The pH of Examples 16-4. compositions (I)-(II) is about 5 to about 7, and of 1(III)-(V) is about 7.5 to about 8.5. #1: add 1N HCl aq. soln to adjust the neat pH of the formula in the range from about 3 to about 5.






Example 17
Liquid Dishwashing Compositions
This Example provides liquid dishwashing compositions that find use in conjunction with the present invention. These compositions are contemplated to find particular utility under Japanese dish washing conditions. However, it is not intended that the present invention be limited to this specific formulation, as many other formulations find use with the present invention.
The following compact high density dishwashing detergent compositions are provided by the present invention.







TABLE 17-1







Compact High Density Dishwashing Detergent Compositions









Compositions













Component
I
II
III
IV
V
VI
















STPP
—
45.0
45.0
—
—
40.0


3Na Citrate
17.0
—
—
50.0
40.2
—


2H2O


Na Carbonate
17.5
14.0
20.0
—
8.0
33.6


Bicarbonate
—
—
—
26.0
—
—


Silicate
15.0
15.0
8.0
—
25.0
3.6


Metasilicate
2.5
4.5
4.5
—
—
—


PB1
—
—
4.5
—
—
—


PB4
—
—
—
5.0
—
—


Percarbonate
—
—
—
—
—
4.8


PAAC
0.02
0.05
0.03
0.04
0.03
0.05


BB1
—
0.1
0.1
—
0.5
—


BB2
0.2
0.05
—
0.1
—
0.6


Nonionic
2.0
1.5
1.5
3.0
1.9
5.9


HEDP
1.0
—
—
—
—
—


DETPMP
0.6
—
—
—
—
—


Paraffin
0.5
0.4
0.4
0.6
—
—


Protease B
0.072
0.053
0.053
0.026
0.059
0.01


Amylase
0.012
—
0.012
—
0.021
0.006


Lipase
—
0.001
—
0.005
—
—


Pectin Lyase
0.001
0.001
0.001
—
—
—


ASP Variant
0.072
0.053
0.053
0.026
0.059
0.01


BTA
0.3
0.2
0.2
0.3
0.3
0.3


Poly-
6.0
—
—
—
4.0
0.9


carboxylate


Perfume
0.2
0.1
0.1
0.2
0.2
0.2





Balance to 100% Moisture and/or Minors*


*Brightener/Dye/SRP1/Na Carboxymethylcellulose/Photobleach/MgSO4/PVPVI/Suds suppressor/High Molecular PEG/Clay.


The pH of Examples 17-1 compositions (I) through (VI) is from about 9.6 to about 11.3.






The following hand dish liquid detergent compositions are provided by the present invention.







TABLE 17-2







Hand Dish Liquid Detergent Compositions









Detergent Compositions













Component
I
II
III
IV
V
VI
















C12-C15AE1.8S
30.0
28.0
25.0
—
15.0
10.0


LAS
—
—
—
5.0
15.0
12.0


Paraffin Sulfonate
—
—
—
20.0
—
—


C10-C18 Alkyl
5.0
3.0
7.0
—
—
—


Dimethyl


Amine Oxide


Betaine
3.0
—
1.0
3.0
1.0
—


C12 poly-OH fatty acid
—
—
—
3.0
—
1.0


amide


C14 poly-OH fatty acid
—
1.5
—
—
—
—


amide


C11E9
2.0
—
4.0
—
—
20.0


DTPA
—
—
—
—
0.2
—


Tri-sodium Citrate
0.25
—
—
0.7
—
—


dihydrate


Diamine
1.0
5.0
7.0
1.0
5.0
7.0


MgCl2
0.25
—
—
1.0
—
—


Protease A
0.02
0.01
0.02
0.01
0.02
0.05


Amylase
0.001
—
—
0.002
—
0.001


Sodium Cumene
—
—
—
2.0
1.5
3.0


Sulphonate


DETBCHD
—
—
—
0.01
0.02
0.01


PB1
1.5
2.8
1.2
—
—
—


ASP Variant
0.02
0.01
0.03
0.01
0.02
0.05





Balance to 100% perfume/dye and/or water






The following liquid automatic dishwashing detergents compositions are provided by the present invention.







TABLE 17-3







Liquid Automatic Dishwashing Detergent Compositions









Compositions














Component
I
II
III
IV
V


















STPP
16
16
18
16
16



Potassium Sulfate
—
10
8
—
10



1,2 propanediol
6.0
0.5
2.0
6.0
0.5



Boric Acid
4.0
3.0
3.0
4.0
3.0



CaCl2 dihydrate
0.04
0.04
0.04
0.04
0.04



Nonionic
0.5
0.5
0.5
0.5
0.5



Protease B
0.03
0.03
0.03
0.03
0.03



Amylase
0.02
—
0.02
0.02
—



ASP Variant
0.1
0.03
0.05
0.03
0.06







Balance to 100% perfume/dye and/or water






The following tablet detergent compositions are provided by the present invention. These compositions are prepared by compression of a granular dishwashing detergent composition at a pressure of 13 KN/cm2, using a standard 12 head rotary press.







TABLE 17-4







Tablet Detergent Compositions









Compositions















Component
I
II
III
IV
V
VI
VII
VIII





STPP
—
48.8 
44.7 
38.2 
—
42.4 
46.1 
36.0 


3Na Citrate 2H2O
20.0 
—
—
—
35.9 
—
—
—


Na Carbonate
20.0 
5.0
14.0 
15.4 
8.0
23.0 
20.0 
28.0 


Silicate
15.0 
14.8 
15.0 
12.6 
23.4 
2.9
4.3
4.2


Lipase
 0.001
—
 0.01
—
 0.02
—
—
—


Protease B
 0.042
 0.072
 0.042
 0.031
—
—
—
—


Protease C
—
—
—
—
 0.052
 0.023
 0.023
 0.029


ASP Variant
 0.01
 0.08
 0.05
 0.04
 0.052
 0.023
 0.023
 0.029


Amylase
 0.012
 0.012
 0.012
—
 0.015
—
 0.017
 0.002


Pectin Lyase
 0.005
—
—
 0.002
—
—
—
—


PB1
—
—
3.8
—
7.8
—
—
8.5


Percarbonate
6.0
—
—
6.0
—
5.0
—
—


PAAC
 0.02
 0.03
 0.05
 0.04
 0.03
 0.02
 0.04
 0.05


BB1
0.2
—
0.5
—
0.3
0.2
—
—


BB2
—
0.2
—
0.5
—
—
0.1
0.2


Nonionic
1.5
2.0
2.0
2.2
1.0
4.2
4.0
6.5


TAED
—
—
—
—
—
2.1
—
1.6


HEDP
1.0
—
—
0.9
—
0.4
0.2
—


DETPMP
0.7
—
—
—
—
—
—
—


Paraffin
0.4
0.5
0.5
0.5
—
—
0.5
—


BTA
0.2
0.3
0.3
0.3
0.3
0.3
0.3
—


Polycarboxylate
4.0
—
—
—
4.9
0.6
0.8
—


PEG 400-30,000
—
—
—
—
—
2.0
—
2.0


Glycerol
—
—
—
—
—
0.4
—
0.5


Perfume
—
—
—
 0.05
0.2
0.2
0.2
0.2







Balance to 100% Moisture and/or Minors*





*Brightener/Dye/SRP1/Na Carboxymethylcellulose/Photobleach/MgSO4/PVPVI/Suds suppressor/High Molecular PEG/Clay.


The pH of Examples 17-4.(I) through (VIII) is from about 10 to about 11.5.


The tablet weight of Examples 17-4.(I) through 7(VIII) is from about 20 grams to about 30 grams.






The following dishwashing composition finds particular use under Japanese washing conditions.







TABLE 17-5







Liquid Dishwashing Compositions











Component
A
B















AE1.4S
24.69
24.69



N-cocoyl N-methyl glucamine
3.09
3.09



Amine oxide
2.06
2.06



Betaine
2.06
2.06



Nonionic surfactant
4.11
4.11



Hydrotrope
4.47
4.47



Magnesium
0.49
0.49



Ethanol
7.2
7.2



LemonEase
0.45
0.45



Geraniol/BHT
—
0.60/0.02



Amylase
0.03
0.005



Protease
0.01
0.43



Balance to 100%










Example 18
Liquid Fabric Cleaning Compositions
The proteases of the present invention find particular use in cleaning compositions. For example, it is contemplated that liquid fabric cleaning composition of particular utility under Japanese machine wash conditions be prepared in accordance with the invention. In some preferred embodiments, these compositions comprise the following components shown in Table 18-1.







TABLE 18-1







Liquid Fabric Cleaning Composition










Component
Amount (%)














AE2.5S
15.00



AS
5.50



N-cocoyl N-methyl
5.50



glucamine



Nonionic surfactant
4.50



Citric acid
3.00



Fatty acid
5.00



Base
0.97



Monoethanolamine
5.10



1,2-Propanediol
7.44



EtOH
5.50



HXS
1.90



Boric acid
3.50



Ethoxylated
3.00



tetraethylenepentaimine



SRP
0.30



Protease
0.069



Amylase
0.06



Cellulase
0.08



Lipase
0.18



Brightener
0.10



Minors/inerts to 100%










Example 19
Granular Fabric Cleaning Compositions
In this Example, various granular fabric cleaning compositions that find use with the present invention are provided. The following Tables provide suitable compositions. However, it is not intended that the present invention be limited to these specific formulations, as many other formulations find use with the present invention.







TABLE 19-1







Granular Fabric Cleaning Compositions









Formulations











Component
A
B
C
D














Protease1
0.10
0.20
0.03
0.05


Protease2


0.2
0.15


C13 linear alkyl benzene sulfonate
22.00
22.00
22.00
22.00


Phosphate (as sodium tripolyphosphate)
23.00
23.00
23.00
23.00


Sodium carbonate
23.00
23.00
23.00
23.00


Sodium silicate
14.00
14.00
14.00
14.00


Zeolite
8.20
8.20
8.20
8.20


Chelan (diethylaenetriamine-petaacetic acid)
0.40
0.40
0.40
0.40


Sodium sulfate
5.50
5.50
5.50
5.50








Water
Balance to 100%
















TABLE 19-2







Granular Fabric Cleaning Compositions









Formulations











Component
A
B
C
D














Protease1
0.10
0.20
0.30
0.05


Protease2


0.2
0.1


C12 alkyl benzene sulfonate
12.00
12.00
12.00
12.00


Zeolite A (1-10 micrometer)
26.00
26.00
26.00
26.00


C12-C14 secondary (2,3) alkyl sulfate,
5.00
5.00
5.00
5.00


Na salt


Sodium citrate
5.00
5.00
5.00
5.00


Optical brightener
0.10
0.10
0.10
0.10


Sodium sulfate
17.00
17.00
17.00
17.00








Fillers, water, minors
Balance to 100%









The following laundry compositions are provided by the present invention. These compositions are suitable for use as granules or tablets.







TABLE 19-3







Granule and Tablet Laundry Detergent Compositions









Composition












Component
I
II
III
IV
V





Base Product







C14-C15AS or TAS
8.0
5.0
3.0
3.0
3.0


LAS
8.0
—
8.0
—
7.0


C12-C15AE3S
0.5
2.0
1.0
—
—


C12-C15E5 or E3
2.0
—
5.0
2.0
2.0


QAS
—
—
—
1.0
1.0


Zeolite A
20.0 
18.0 
11.0 
—
10.0 


SKS-6 (dry add)
—
—
9.0
—
—


MA/AA
2.0
2.0
2.0
—
—


AA
—
—
—
—
4.0


3Na Citrate 2H2O
—
2.0
—
—
—


Citric Acid
2.0
—
1.5
2.0
—


(Anhydrous)


DTPA
0.2
0.2
—
—
—


EDDS
—
—
0.5
0.1
—


HEDP
—
—
0.2
0.1
—


PB1
3.0
4.8
—
—
4.0


Percarbonate
—
—
3.8
5.2
—


NOBS
1.9
—
—
—
—


NACA OBS
—
—
2.0
—
—


TAED
0.5
2.0
2.0
5.0
 1.00


BB1
 0.06
—
 0.34
—
 0.14


BB2
—
 0.14
—
 0.20
—


Anhydrous Na
15.0 
18.0 
8.0
15.0 
15.0 


Carbonate


Sulfate
5.0
12.0 
2.0
17.0 
3.0


Silicate
—
1.0
—
—
8.0


Protease B
 0.033
 0.033
—
—
—


Protease C
—
—
 0.033
 0.046
 0.033


Lipase
—
 0.008
—
—
—


Amylase
 0.001
—
—
—
 0.001


Cellulase
—
  0.0014
—
—
—


Pectin Lyase
 0.001
 0.001
 0.001
 0.001
 0.001


ASP Variant
 0.03
 0.05
1.0
 0.06
0.1







Balance to 100% Moisture and/or Minors*





*Perfume/Dye, Brightener/SRP1/Na Carboxymethylcellulose/Photobleach/MgSO4/PVPVI/Suds suppressor/High Molecular PEG/Clay.






The following laundry detergent compositions are contemplated to provide particular use under European machine wash conditions.







TABLE 19-3







Granular Fabric Cleaning


Compositions









Formulations












Component
A
B
C
















LAS
7.0
5.61
4.76



TAS


1.57



C45AS
6.0
2.24
3.89



C25E25
1.0
0.76
1.18



C45E7


2.0



C25E3
4.0
5.5



QAS
0.8
2.0
2.0



STPP



Zeolite
25.0
19.5
19.5



Citric acid
2.0
2.0
2.0



NaSKS-6
8.0
10.6
10.6



Carbonate I
8.0
10.0
8.6



MA/AA
1.0
2.6
1.6



CMC
0.5
0.4
0.4



PB4

12.7



Percarbonate


19.7



TAED

3.1
5.0



Citrate
7.0



DTPMP
0.25
0.2
0.3



HEDP
0.3
0.3
0.3



QEA 1
0.9
1.2
1.0



Protease 1
0.02
0.05
0.035



Lipase
0.15
0.25
0.15



Cellulase
0.28
0.28
0.28



Amylase
0.4
0.7
0.3



PVPI/PVNO
0.4

0.1



Photoactivated
15 ppm
27 ppm
27 ppm



bleach (ppm)



Brightener 1
0.08
0.19
0.19



Brightener 2

0.04
0.04



Perfume
0.3
0.3
0.3



Effervescent
15
15
5



granules (malic



acid 40%,



sodium



bicarbonate



40%, sodium



carbonate 20%)



Silicon
0.5
2.4
2.4



antifoam








Minors/inerts to
Balance to 100%


100%









Example 20
Hard Surface Cleaning Detergent Compositions
The present invention also provides compositions suitable for cleaning of hard surfaces.







TABLE 20







Liquid Hard Surface Cleaning Detergent Compositions









Composition














Component
I
II
III
IV
V
VI
VII





C9-C11E5
2.4
1.9
2.5
2.5
2.5
2.4
2.5


C12-C14E5
3.6
2.9
2.5
2.5
2.5
3.6
2.5


C7-C9E6
—
—
—
—
8.0
—
—


C12-C14E21
1.0
0.8
4.0
2.0
2.0
1.0
2.0


LAS
—
—
—
0.8
0.8
—
0.8


Sodium culmene sulfonate
1.5
2.6
—
1.5
1.5
1.5
1.5


Isachem ® AS
0.6
0.6
—
—
—
0.6
—


Na2CO3
0.6
 0.13
0.6
0.1
0.2
0.6
0.2


3Na Citrate 2H2O
0.5
 0.56
0.5
0.6
 0.75
0.5
 0.75


NaOH
0.3
 0.33
0.3
0.3
0.5
0.3
0.5


Fatty Acid
0.6
 0.13
0.6
0.1
0.4
0.6
0.4


2-butyl octanol
0.3
0.3
—
0.3
0.3
0.3
0.3


PEG DME-2000 ®
0.4
—
0.3
 0.35
0.5
—
—


PVP
0.3
0.4
0.6
0.3
0.5
—
—


MME PEG (2000) ®
—
—
—
—
—
0.5
0.5


Jeffamine ® ED-2001
—
0.4
—
—
0.5
—
—


PAAC
—
—
—
 0.03
 0.03
 0.03
—


DETBCHD
 0.03
 0.05
 0.05
—
—
—
—


Protease B
 0.07
 0.05
 0.05
 0.03
 0.06
 0.01
 0.04


Amylase
 0.12
 0.01
 0.01
—
 0.02
—
 0.01


Lipase
—
 0.001
—
 0.005
—
 0.005
—


ASP Variant
 0.07
 0.05
 0.08
 0.03
 0.06
 0.01
 0.04


MCAEM (C8-C10E2 Acetate)
3.5
5.6
4.8
5.3
3.6
8.0
4.7


Pectin Lyase
 0.001
—
 0.001
—
—
—
 0.002


PB1
3.5
4.6
2.7
3.8
3.6
4.2
2.7







Balance to 100% perfume/dye, and/or water





The pH of these compositions is from about 7.4 to about 9.5.






Example 21
Animal Feed Comprising ASP
The present invention also provides animal feed compositions comprising ASP variants. In this Example, one such feed, suitable for poultry is provided. However, it is not intended that the present invention be limited to this specific formulation, as the proteases of the present invention find use with numerous other feed formulations. It is further intended that the feeds of the present invention be suitable for administration to any animal, including but not limited to livestock (e.g., cattle, pigs, sheep, etc.), as well as companion animals (e.g., dogs, cats, horses, rodents, etc.). The following Table provides a formulation for a mash, namely a maize-based starter feed suitable for administration to turkey poults up to 3 weeks of age.







TABLE 21-1







Animal Feed Composition










Ingredient Amount
(wt. %)














Maize
36.65



Soybean meal (45.6% CP)
55.4



Animal-vegetable fat
3.2



Dicalcium phosphate
2.3



Limestone
1.5



Mineral premix
0.3



Vitamin premix
0.3



Sodium chloride
0.15



DL methionine
0.2










In some embodiments, this feed formulation is supplemented with various concentrations of the protease(s) of the present invention (e.g., 2,000 units/kg, 4,000 units/kg and 6,000 units/kg).
All patents and publications mentioned in the specification are indicative of the levels of those skilled in the art to which the invention pertains. All patents and publications are herein incorporated by reference to the same extent as if each individual publication was specifically and individually indicated to be incorporated by reference.
Having described the preferred embodiments of the present invention, it will appear to those ordinarily skilled in the art that various modifications may be made to the disclosed embodiments, and that such modifications are intended to be within the scope of the present invention.
Those of skill in the art readily appreciate that the present invention is well adapted to carry out the objects and obtain the ends and advantages mentioned, as well as those inherent therein. The compositions and methods described herein are representative of preferred embodiments, are exemplary, and are not intended as limitations on the scope of the invention. It is readily apparent to one skilled in the art that varying substitutions and modifications may be made to the invention disclosed herein without departing from the scope and spirit of the invention.
The invention illustratively described herein suitably may be practiced in the absence of any element or elements, limitation or limitations which is not specifically disclosed herein. The terms and expressions which have been employed are used as terms of description and not of limitation, and there is no intention that in the use of such terms and expressions of excluding any equivalents of the features shown and described or portions thereof, but it is recognized that various modifications are possible within the scope of the invention claimed. Thus, it should be understood that although the present invention has been specifically disclosed by preferred embodiments and optional features, modification and variation of the concepts herein disclosed may be resorted to by those skilled in the art, and that such modifications and variations are considered to be within the scope of this invention as defined by the appended claims.
The invention has been described broadly and generically herein. Each of the narrower species and subgeneric groupings failing within the generic disclosure also form part of the invention. This includes the generic description of the invention with a proviso or negative limitation removing any subject matter from the genus, regardless of whether or not the excised material is specifically recited herein.

## Claims

1. An isolated serine protease variant of the Cellulomonas 69B4 protease set forth by SEQ ID NO: 8, wherein the variant has at least 80% amino acid identity to SEQ ID NO:8, comprises substitutions R141/A64K/R123F/R159K/D184T, and has the serine protease activity of the Cellulomonas 69B4 protease set forth by SEQ ID NO: 8.

2. A composition comprising the isolated serine protease variant of claim 1.

3. A composition comprising the isolated serine protease variant of claim 1, wherein said isolated serine protease variant has immunological cross-reactivity with an antibody to the serine Cellulomonas 69B4 protease set forth by the amino acid sequence of SEQ ID NO:8.

4. The variant of claim 1, wherein said variant has improved thermostability as compared to the Cellulomonas 69B4 protease set forth by the amino acid sequence of SEQ ID NO:8.

5. The variant of claim 1, wherein said variant has improved LAS stability as compared to the Cellulomonas 69B4 protease set forth by the amino acid sequence of SEQ ID NO:8.

6. The variant of claim 1, wherein said variant has improved activity, as compared to the Cellulomonas 69B4 protease set forth by the amino acid sequence of SEQ ID NO:8.

7. The variant of claim 6, wherein said variant has improved caseinolytic activity as compared to the Cellulomonas 69B4 protease set forth by the amino acid sequence of SEQ ID NO:8.

8. The variant of claim 6, wherein said variant has improved keratinolytic activity as compared to the Cellulomonas 69B4 protease set forth by the amino acid sequence of SEQ ID NO:8.

9. The variant of claim 6, wherein said variant has improved wash performance activity as compared to the Cellulomonas 69B4 protease set forth by the amino acid sequence of SEQ ID NO:8.

10. The variant of claim 6, wherein said variant has improved dishwashing performance activity as compared to the Cellulomonas 69B4 protease set forth by the amino acid sequence of SEQ ID NO:8.

11. The variant of claim 6, wherein said variant has improved stain removal activity as compared to the Cellulomonas 69B4 protease set forth by the amino acid sequence of SEQ ID NO:8.

12. The isolated serine protease variant of claim 1, wherein said variant exhibits an altered surface property as compared to the Cellulomonas 69B4 protease set forth by the amino acid sequence of SEQ ID NO:8.

13. The isolated serine protease variant of claim 1, wherein said protease variant has at least one improved property as compared to the Cellulomonas 69B4 protease set forth by the amino acid sequence of SEQ ID NO:8.

14. The protease of claim 13, wherein said at least one improved property is selected from the group consisting of acid stability, thermostability, casein hydrolysis, keratin hydrolysis, cleaning performance, and LAS stability.

15. A cleaning composition comprising the serine protease variant as set forth in claim 1.

16. A cleaning composition comprising the variant serine protease of claim 1, wherein said serine protease variant has immunological cross-reactivity with an antibody to the serine Cellulomonas 69B4 protease set forth by the amino acid sequence of SEQ ID NO:8.

17. The cleaning composition of claim 16, further comprising one or more additional enzymes or enzyme derivatives selected from the group consisting of proteases, amylases, lipases, mannanases, pectinases, cutinases, oxidoreductases, hemicellulases, and cellulases.

18. The cleaning composition of claim 15, further comprising at least one stabilizing agent.

19. The composition of claim 18, wherein said stabilizing agent is selected from borax, glycerol, and competitive inhibitors.

20. The composition of claim 19, wherein said competitive inhibitors stabilize said serine protease variant to anionic surfactants.

21. The composition of claim 18, wherein said serine protease variant is an autolytically stable variant.

22. A cleaning composition comprising at least 0.0001 weight percent of the serine protease variant of claim 1, and optionally, an adjunct ingredient.

23. The cleaning composition of claim 22, wherein said composition comprises from about 0.001 to about 0.5 weight percent of said serine protease variant.

24. The cleaning composition of claim 22, wherein said composition comprises from about 0.01 to about 0.1 weight percent of said serine protease variant.

25. The cleaning composition of claim 22, said cleaning composition comprising a surfactant.

26. The cleaning composition of claim 25, wherein said surfactant material comprises a sodium alkyl sulfate surfactant that comprises an ethylene oxide moiety.

27. The cleaning composition of claim 15, wherein said cleaning composition is selected from liquid, powder, granular, and tablet compositions.

28. The cleaning composition of claim 15, wherein said composition further comprises a hydrogen peroxide source.

29. The cleaning composition of claim 28, wherein said hydrogen peroxide source comprises at least one persalt, wherein said persalt is alkalimetal percarbonate, or a mixture of persalts.

30. The cleaning composition of claim 29, wherein said composition further comprises a bleach catalyst, bleach activator and/or mixtures thereof.