Abstract:
A modified GAD especially characterized by a substantially preserved immunogenicity in connection with diabetes compared with a non-modified GAD and a reduced or non-existent effectivity in connection with a GABA-synthesis. The invention relates also to a method for manufacturing a modified GAD, a method for supplying a modified GAD, nucleotide sequence encoding the modified GAD, a vector containing the nucleic acid sequence, a host, a pharmaceutical composition comprising modified GAD and use thereof for treating and/or preventing autoimmune disorders such as IDDM.

Description:
The present invention relates to a genetically-modified recombinant form of the 65 kDa human glutamic acid decarboxylase (hGAD65) that retains structural integrity for immuno-reactivity characteristic of the unmodified form, but that is without (or with considerably reduced) enzyme activity. The novel modified GAD is advantageously used in pharmaceutical compositions for treating autoimmune diseases. 
     BACKGROUND OF THE INVENTION 
     The inhibitory neurotransmitter γ-aminobutyric acid (GABA), derived from L-glutamic acid by GAD is present in brain as well as several tissues outside the central nervous system. Biological functions of GAD and GABA extend beyond regulation of neurotransmission to include effects on the immune system as well as modulation of cell proliferation, protein synthesis and metabolism. 
     GAD has recently been associated with autoimmune insulin-dependent diabetes mellitus (IDDM) (Boekkeskov et al, Nature 347:151 (1990), incorporated by reference) because of the increased incidence of IDDM in patients with stiff-man syndrome, a disease associated with autoantibodies against GAD. Antibodies from diabetic sera have also been shown to bind GAD. At least two different GAD, i.e. GAD 65 and 67 have been identified and sequenced in human beings. hGAD65 and hGAD67 have several epitopes in common. However, different epitopes are involved in different reactions and contexts. 
     Binding of the coenzyme pyridoxal-5&#39;-phospate (PLP) to GAD was first reported by Roberts &amp; Frankel in 1951 (J. Biol. Chem. 188:789, fully incorporated in the description by reference), and formation of a Schiff base during GAD-mediated decarboxylation was subsequently proposed by W T Jenkins 1961, Fed. Proc. 20:978 (fully incorporated in the description by reference) (i.e. referenced in Roberts &amp; Simonsen 1963, Biochem. Pharmacol. 12:113-134, fully incorporated in the description by reference). Accordingly, PLP has been identified as a critical co-factor in decarboxylation by GAD. 
     Cloning of GAD is disclosed in WO92/05446 and WO92/20811 (both incorporated by reference). 
     Location of the PLP binding site within the amino acid sequence of hGAD65 was enabled by publication of the cDNA sequence of this enzyme (P.N.A.S. 88:8337, fully incorporated in the description by reference). The site was found because of the homology centred around the amino acid lysine at a/a #396 in hGAD65--to the sequence: X-His-Lys-X that was previously published as the PLP binding site in crystallised E.coli GAD (Biochemistry 9:226-233; Biochemistry 13:670-676, both of which are fully incorporated in the description by reference). 
     This region in hGAD65 has the following amino acid sequence (SEQ ID NOS:9 and 10): 
     
         ______________________________________Thr  Trp    Asn    Pro  His  Lys* Met  Met  Gly  ValT    W      N      P    H    K*   M    M    G    V•                      •             •#391                         #396                #400______________________________________ *selected herein for mutation to change K to Arg (R) 
    
     This homology in this region has subsequently been confirmed by Lernmark (unpublished) using computer homology matches to ca. 10 other PLP-binding (non-GAD) proteins. 
     The approach of the present invention is a novel GAD without enzyme activity by mutating a single codon in the PLP binding site in the cDNA sequence for hGAD65. This results in the substitution of a single amino acid that is incapable of supporting wild-type enzyme activity. 
     As the lysine at #396 has been identified as critical for enzyme activity (via formation of a Schiff base during GAD-mediated decarboxylation), the present invention is directed to substitute an amino acid incapable of Schiff base formation at position #396 as a subtle means of achieving this effect. 
     In addition, a &#34;conservative amino acid substitution&#34; (i.e. replacement of lysine by an amino acid of comparable size and hydrophobicity) is intended to minimise any structural or conformational changes to the hGAD65 protein, and thereby avoid alterations to either antigenic etitopes or T cell determinants originally present in recombinant human GAD (rhGAD65). 
     SUMMARY OF THE INVENTION 
     The present invention relates to a modified, non-enzymically active hGAD65 retaining the immunoreactive characteristics of wild type hGAD65, wherein amino acid #396 has been altered an L-amino acid other than lysine (SEQ ID NO:3). It is preferred to alter amino acid #396 to an amino acid chosen from the group of isoleucine (SEQ ID NO:4), arginine (SEQ ID NO:5), glutamine (SEQ ID NO:6), histidine (SEQ ID NO:7) or glycine (SEQ ID NO:8). In a particularly preferred embodiment of the present invention amino acid #396 is altered to arginine. 
     DETAILED DESCRIPTION OF THE INVENTION 
     As already mentioned, the modified hGAD65 protein having considerably reduced enzymatic activity constitutes an object of the present invention. This altered protein can be used for treating auto-immune diseases, such as IDDM. 
     &#34;Modified hGAD65 protein&#34; as utilized herein refers to human glutamic acid decarboxylase having a molecular weight of 65 kDa wherein amino acid #396 has been altered to an amino acid other than lysine, and whose enzymatic activity has been considerably reduced. In a preferred embodiment, the altered amino acid is chosen from the group of isoleucine, arginine, glutamine, histidine and glycine. Of these, arginine is considered to be most preferred as it is unable to form a Schiff base, but has similar hydrophobicity (index of both is 3.0) and size compared to lysine. The amino acid sequence of this modified hGAD65 protein is disclosed as SEQ ID NO:5. 
     The present invention also relates to nucleic acid sequences encoding a modified hGAD65 protein taken into account the degenerated genetic code. A preferred embodiment is disclosed as SEQ ID NO:2. 
     In an other aspect, the present invention relates to an oligonucleotide that can be used for altering amino acid #396 to an amino acid other than lysine by site-directed mutagenesis of a nucleic acid encoding wild-type hGAD65. A preferred embodiment of such an oligonucleotide is disclosed as SEQ ID NO:1. 
     In another aspect, the present invention relates to vectors and host cells comprising the above mentioned nucleic acids encoding modified hGAD65 protein. The nucleic acids may be readily introduced into a wide variety of host cells. Representative examples of such host cells include plant cells, eukaryotic cells and prokaryotic cells. Within preferred embodiments, the nucleic acid molecules are introduced into cells from an insect or a vertebrate or warm-blooded anomal, such as a human, macaque, dog, cow, horse, pig, sheep, rat hamster, mouse, or a fish, or any hybrid thereof. 
     The nucleic acid molecules (or vectors) may be introduced into host cells by a wide variety of mechanisms, including for example calcium phosphate-mediated transfection (Wigler et al., Cell 14:725, 1978, fully incorporated in the description by reference), lipofection; gene gun (Corsaro and Pearson, Somatic Cell Gen. 1:603, 1981; Graham and Van der Eb, Virology 52:456, 1973; both of which are fully incorporated in the description by reference), electroporation (Neumann et al., EMBO J. 1:841-845, 1982, fully incorporated in the description by reference), retroviral, adenoviral protoplast-mediated transfection or DEAE-dextran mediated transfection (Ausubel et al., (eds), Current Protocols in Molecular Biology, John Wiley and Sons, Inc., NY, N.Y., USA 1987, fully incorporated in the description by reference) as well as baculovirus transfection, such as the method described in EP 0 327 180 (fully incorporated in the description by reference). 
     As noted above, the present invention also provides a variety of pharmaceutical compositions for treating and/or preventing autoimmune diseases, such as IDDM, comprising pharmaceutically active amount of a modified hGAD65 protein along with a pharmaceutically or physiologically acceptible carrier, excipients or diluents. Generally, such carriers should be non-toxic to recipients at the dosages and concentrations employed. Ordinarily, the preparation of such compositions entails combining the therapeutic agent with buffers, antioxidants such as ascorbic acid, low molecular weight (less than about 10 residues) polypeptides, proteins, amino acids, carbohydrates including glucose, sucrose or dextrins, chelating agents such as EDTA, glutathione and other stabilizers and excipients. Neutral buffered saline or saline mixed with non-specific serum albumin are exemplary appropriate diluents. 
     In addition, the pharmaceutical compositions of the present invention may be prepared for administration by a variety of routes, including for example orally, sublingually, rectally, intraarticularly, intracranially, intradermally, intramuscularly, intraocularly, intraperitoneally, intravenously or subcutaneously. The compositions can occur as tablets, sublingual tablets, granules, pills, capsules, dragees, solutions, syrups, mixtures, emulsions, suppositorys, aerosols, etc. 
     Furthermore, the above mentioned nucleic acid molecules can be used as pharmaceuticals and directly be injected into a human or animal in need of such treatment by using a gene gun (Corsaro and Pearson, Somatic Cell Gen. 1:603, 1981; Graham and Van der Eb, Virology 52:456, 1973; both of which are fully incorporated in the description by reference). The treated human or animal body are then able to synthesize the modified hGAD65 according to the present invention. 
     As already mentioned, GAD is expressed by CNS, but also by islet cells in pancrease even producing insulin. GAD 65 is regarded to be the antigen initiating the immune response leading to diabetes, type 1 (IDDM). A GAD similar antigen has also been identified on Epstein Barr transformed lymphocytes and in coxsaclievirus-infected cells. The influence of GAD 65 and the relation between IDDM and the presence of GAD 65 are described in Kaufman et al., Nature 361:69, 1993; and Nov. 4th, 1993, pp 69-71, incorporated by reference. 
     Accordingly the present invention concerns a method to prevent and to treat IDDM by inducing a tolerance to GAD as well as a GAD for such a treatment. The method can be used on all or certain population segments with the object to eliminate or to minimize the IDDM frequency, at least of GAD initiated IDDM. The method can be adapted above all to individuals with a genetic predisposition for IDDM and to individuals with an increased antibody titer against GAD with the object to lead the at least in the last mentioned case already started autoimmune reaction in regress. The method can also be used with patients with a developed IDDM to eliminate the possibility of a renewned autoimmune attack after e.g. a pancreas or an islet cell transplantation. The method relates tro modifying the DNA sequence coding GAD in such a way that the efficiency of the produced peptide in the connection with GABA decreases or vanishes without thereby its diabetes autoimmune antigenic features disappearing. In this way GAD can be used more safely for human beings and thus GAD can be administered in various ways for introducing tolerance. 
     For the participation of GAD as an enzyme during the splitting of Glutamatic Acid into GABA and carbon dioxide the presence of a cofactor PLP (pyridoxal-5&#39;-phosphate) is required. The PLP binding site consists of aminoacid 395-397 of wild type hGAD65. By replacing the aminoacid #396 with another amino acid the binding site for PLP is influenced so that said cofactor PLP is not bound to said binding site on the GAD molecule resulting in that said GAD molecule no longer participates in the GABA synthesis. The modification at said binding site is not influencing the GAD epitope being diabetogenerating. The modified GAD molecule is expressed with a known recombinant technique. 
     The manufacturing of cDNA from mRNA is well known today. The modified hGAD65 protein produced is then used to treat IDDM. 
     This modified hGAD65 so obtained is useful as an immunomodulant therapeutic to prevent certain autoimmune diseases (including insulin-dependent diabetes mellitus) and certain other diseases (including neurological diseases). The provision of this is a novel means to avoid (or minimise) the risk of toxicity (e.g. neurotoxicity) possibly arising from the enzyme activity of a GAD-based immuno-therapeutic. 
     From now on, the invention will be described with reference to the enclosed examples. However, it should be understood that the scope of the present invention is not to be restricted to those examples. 
     Materials and methods 
     1. DNA oligomer design and synthesis 
     Both oligos (below) represent sequences from the coding strand of both the insert or vector, and are intended to hybridise to the same (ie. non-coding) strand of p65 (Synectics proprietary clone derived from the cDNA sequence for human GAD65 published by Karlsen et al 1991 Proc. Natl. Acad. Sci USA 88:8337-8341 and Bu et al. 1992 Proc. Natl. Acad. Sci USA 89:2115-2119; both of which are fully incorporated in the description by reference). 
     The mutagenic primer (SEQ ID NO:1) was designed according to Stratagene recommendations and contained the CGC codon for Arginine, flanked at either end by 14 nts derived from the corresponding hGAD65 cDNA sequence. Of the 6 alternative codons for Arginine (viz. AGA, AGG, CGA, CGC, CGG, CGU), the codon CGC was selected as this has the greatest usage in animals (Grantham R, Gautier C, Gouy M, Jacobzone M, Mercier R 1981 Nucleic Acid Res 9:43-74: fully incorporated in the description by reference). Accordingly, the 31-mer mutagenic oligo has sequence: 
     5&#39;-CG TGG AAT CCA CAC CGC ATG ATG GGA GTC CC-3&#39; (SEQ ID NO:1) 
     -corresponding to nt #1186 (upstream end) and #1216 (downstream) of p65. This mutagenic primer (coded &#34;SDM-PLP&#34;) was synthesised at the Karonlinska Institute facility, and kinased (via T4 polynycleotide kinase, see Current Protocols in Molecular Biology, John Wiley &amp; Sons, Inc., fully incorporated in the description by reference) prior to use. The Tm of SDM-PLP is estimated as 60° C. and was used during mutagenesis. 
     The Sca I to Mlu I selection primer was chosen because of the absence of sites in the rhGAD65 insert and the single site in the pGEM4z vector of p65. This kinased primer was supplied by Stratagene (catalogue #300331). 
     2. Site-directed mutagenesis of proprietary hGAD65 clone &#34;p65&#34; 
     The Chameleon™ double-stranded DNA site-directed mutagenesis kit from Stratagene was used for modification of the Synectics Biotechnology rhGAD65 clone (coded &#34;p65&#34;), and followed the manufacturers&#39; instructions in the instruction manual (Catalog #200509, Jun. 13, 1994, fully incorporated in the description by reference). 
     3. DNA sequencing of candidate clones 
     The required mutation (present in clone #18) was confirmed by DNA sequencing using &#34;Taq DyeDeoxy Terminator Cycle Sequencing&#34; (Applied BioSystems) and &#34;ALF&#34; sequenator at the Karonlinska facility. The sequencing oligo &#34;JR11&#34; (annealing to nts #1353-1369 in the coding strand) was used to confirm sequence at nts &#34;1200-1202. Oligo &#34;JR4&#34; (annealing to the noncoding strand upstream of nts &#34;1200-1202, at nts #1033-1050) was used to obtain seqence in a downstream direction to the site of the mutation. 
     Methods used for these manipulations followed previously-published procedures (e.g. Current Protocols in Molecular Biology, John Wiley &amp; Sons, Inc; Sambrook, Fritsch &amp; Maniatis Molecular Cloning: A Laboratory Manual. Cold Spring Harbor Laboratory Press, 1989; both of which are fully incorporated in the description by reference). 
     4. Check for comparable immunoreactivity between mutant and wild-type 
     Immunoreactivity of the in vitro transcribed/translated mutant rhGAD65 cDNA (clone #18) was shown to be indistinguishable from the original (non-mutant) p65 clone by using IDDM sera in a radioimmunoassay specific for GAD65 autoantibodies (Falorni et al. 1993 Diabetologia 36 (suppl. 1) A45; Falorni et al. 1994 Autoimmunity 19:113-125; both of which are fully incorporated in the description by reference). 
     This analysis compared immunoreactivity of the mutant and wild-type clones by comparing radioactivity precipitated by ca. 20GAD65-positive IDDM sera on incubation with  35  S-labelled rhGAD65 protein synthesised in vitro from either the wild-type or mutant rhGAD65 cDNA clones. 
    
    
     EXAMPLE 1 
     Site-directed Mutagenesis of Wild-type hGAD65 
     An oligonucleotide having the sequence: 
     5&#39;-CG TGG AAT CCA CAC CGC ATG ATG GGA GTC CC-3&#39; (SEQ ID NO:1) 
     was synthesized, phosphorylated and used to mutate a cDNA having the sequence of FIG. 2 in Karlsen et al., P.N.A.S. 88:8337, 1991 (incorporated into the description by reference) according the instructions in the above mentioned Chamelon™ kit. Competent Escherichia coli F&#39;11 rec A cells were transformed with p65 mutant plasmids. Positive clones were screened by DNA sequencing using the Taq DyeDeoxy™ Terminator Cycle Sequencing Kit from Applied Biosystems. A clone containing the desired mutatant were found. 
     EXAMPLE 2 
     In Vitro Translation of  35  S-mutant hGAD65 
     Recombinant modified human GAD65 was produced by in vitro transcription/translation of the cDNA inserted into the pGEM4z vector. The translation reaction was carried out using SP6 RNA polymerase and rabbit reticulocyte lysate. The materials used in the experiment were part of the TNT coupled transcription/translation system from Promega. 
     The following reaction mixture was prepared: 
     Plasmid DNA encoding modified hGAD65 (2 mg/ml) 1 μl 
     RNAsin (Promega) 1 μl 
     TNT buffer 2 μl 
     Amino acid mixture (without methionine)(Promega) 1 μl 
       35  S-methionine (NEN-Dupont) 4 μl 
     SP6 RNA polymerase (Promega) 1 μl 
     Rabbit Reticulocyte lysate (Promega) 25 μl 
     Water up to 50 μl 
     The reactions were incubated for 90 minutes at 30° C. At the end of the incubation time, 2 ml from the reaction tube was incubated for 10 minutes at 37° C. with 1M NaOH/2% H 2  O 2  and 30 minutes on ice with 0.9 ml 25% trichloroacetic acid (TCA) in order to precipitate proteins that may have been formed. The TCA precipitate was collected on a GF-A Whatman glass fibre filter and its radioactivity was evaluated in a liquid scintillation analyser. It was shown that the precipitate was radioactive and hence, modified hGAD65 was formed. 
     EXAMPLE 3 
     Immunoprecipitation of 35S-modified hGAD65 with IDDM Sera 
     In vitro translated modified hGAD65 from example 2 was immunoprecipitated with IDDM sera to test the immunoreactivity. For each serum sample 15000 cpm TCA-precipitable GAD65 was precipitated with 2 μl of human serum from healthy or diabetic individuals (final serum dilution 1:50). After overnight immunoprecipitation in cold room, antibody bound  35  S-modified hGAD65 was separated from free  35  S-modified hGAD65 by protein A Sepharose using a Multiscreen Assay Millipore system. Immunoprecipitated radioactivity was evaluated in a liquid scintillation analyzer. 
     Immunoprecipitation of  35  S-modified hGAD65 for diabetic sera was significantly higher than that obtained with sera from healthy persons. The used diabetic sera were previously found positive for antibodies against wild type hGAD65. Hence, it was concluded that modified hGAD65 has an immunoreactivity similar to that of wild type hGAD65. 
     
         __________________________________________________________________________#             SEQUENCE LISTING- &lt;160&gt; NUMBER OF SEQ ID NOS: 14- &lt;210&gt; SEQ ID NO 1&lt;211&gt; LENGTH: 31&lt;212&gt; TYPE: DNA&lt;213&gt; ORGANISM: Artificial Sequence&lt;220&gt; FEATURE:#Sequence:R INFORMATION: Description of Artificial#No. 396 of hGAD65ide for altering residue- &lt;400&gt; SEQUENCE: 1#          31      catg atgggagtcc c- &lt;210&gt; SEQ ID NO 2&lt;211&gt; LENGTH: 1761&lt;212&gt; TYPE: DNA&lt;213&gt; ORGANISM: Artificial Sequence&lt;220&gt; FEATURE:#Sequence:ArtificialION: Description of Artificial gene encoding mutant hGAD65- &lt;400&gt; SEQUENCE: 2- atggcatctc cgggctctgg cttttggtct ttcgggtcgg aagatggctc tg - #gggattcc  60- gagaatcccg gcacagcgcg agcctggtgc caagtggctc agaagttcac gg - #gcggcatc 120- ggaaacaaac tgtgcgccct gctctacgga gacgccgaga agccggcgga ga - #gcggcggg 180- agccaacccc cgcgggccgc cgcccggaag gccgcctgcg cctgcgacca ga - #agccctgc 240- agctgctcca aagtggatgt caactacgcg tttctccatg caacagacct gc - #tgccggcg 300- tgtgatggag aaaggcccac tttggcgttt ctgcaagatg ttatgaacat tt - #tacttcag 360- tatgtggtga aaagtttcga tagatcaacc aaagtgattg atttccatta tc - #ctaatgag 420- cttctccaag aatataattg ggaattggca gaccaaccac aaaatttgga gg - #aaattttg 480- atgcattgcc aaacaactct aaaatatgca attaaaacag ggcatcctag at - #acttcaat 540- caactttcta ctggtttgga tatggttgga ttagcagcag actggctgac at - #caacagca 600- aatactaaca tgttcaccta tgaaattgct ccagtatttg tgcttttgga at - #atgtcaca 660- ctaaagaaaa tgagagaaat cattggctgg ccagggggct ctggccatgg ga - #tattttct 720- cccggtggcg ccatatctaa catgtatgcc atgatgatcg cagcgtttaa ga - #tgttccca 780- gaagtcaagg agaaaggaat ggctgctctt cccaggctca ttgccttcac gt - #ctgaacat 840- agtcattttt ctctcaagaa gggagctgca gccgtaggga ttggaacaga ca - #gcgtgatt 900- ctgattaaat gtgatgagag agggaaaatg attccatctg atcttgaaag aa - #ggattctt 960- gaagccaaac agaaagggtt tgttcctttc ctcgtgagtg ccacagctgg aa - #ccaccgtg1020- tacggagcat ttgaccccct cttagctgtc gctgacattt gcaaaaagta ta - #agatctgg1080- atgcatgtgg atgcagcttg gggtggggga ttactgatgt cccgaaaaca ca - #agtggaaa1140- ctgagtggcg tggagagggc caactctgtg acgtggaatc cacaccgcat ga - #tgggagtc1200- cctttgcagt gctctgctct cctggttaga gaagagggat tgatgcagaa tt - #gcaaccaa1260- atgcatgcct cctacctctt tcagcaagat aaacattatg acctgtccta tg - #acactgga1320- gacaaggcct tacagtgcgg acgccacgtt gatgttttta aactatggct ga - #tgtggagg1380- gcaaagggga ctaccgggtt tgaagcgcat gttgataaat gtttggagtt gg - #cagagtat1440- ttatacaaca tcataaaaaa ccgagaagga tatgagatgg tgtttgatgg ga - #agcctcag1500- cacacaaatg tctgcttctg gtacattcct ccaagcttgc gtactctgga ag - #acaatgaa1560- gagagaatga gtcgcctctc gaaggtggct ccagtgatta aagccagaat ga - #tggagtat1620- ggaaccacaa tggtcagcta ccaacccttg ggagacaagg tcaatttctt cc - #gcatggtc1680- atctcaaacc cagcggcaac tcaccaagac attgacttcc tgattgaaga aa - #tagaacgc1740#                1761ta a- &lt;210&gt; SEQ ID NO 3&lt;211&gt; LENGTH: 585&lt;212&gt; TYPE: PRT&lt;213&gt; ORGANISM: Artificial Sequence&lt;220&gt; FEATURE:#Sequence:Modified,TION: Description of Artificial non-enzymically active hGAD65 retaining - # the#type hGAD65.eactive characteristics of wild Xaa at position 396 is Ile, Ar - #g, Gln, His or Gly.- &lt;400&gt; SEQUENCE: 3- Met Ala Ser Pro Gly Ser Gly Phe Trp Ser Ph - #e Gly Ser Glu Asp Gly#                 15- Ser Gly Asp Ser Glu Asn Pro Gly Thr Ala Ar - #g Ala Trp Cys Gln Val#             30- Ala Gln Lys Phe Thr Gly Gly Ile Gly Asn Ly - #s Leu Cys Ala Leu Leu#         45- Tyr Gly Asp Ala Glu Lys Pro Ala Glu Ser Gl - #y Gly Ser Gln Pro Pro#     60- Arg Ala Ala Ala Arg Lys Ala Ala Cys Ala Cy - #s Asp Gln Lys Pro Cys# 80- Ser Cys Ser Lys Val Asp Val Asn Tyr Ala Ph - #e Leu His Ala Thr Asp#                 95- Leu Leu Pro Ala Cys Asp Gly Glu Arg Pro Th - #r Leu Ala Phe Leu Gln#           110- Asp Val Met Asn Ile Leu Leu Gln Tyr Val Va - #l Lys Ser Phe Asp Arg#       125- Ser Thr Lys Val Ile Asp Phe His Tyr Pro As - #n Glu Leu Leu Gln Glu#   140- Tyr Asn Trp Glu Leu Ala Asp Gln Pro Gln As - #n Leu Glu Glu Ile Leu145                 1 - #50                 1 - #55                 1 -#60- Met His Cys Gln Thr Thr Leu Lys Tyr Ala Il - #e Lys Thr Gly His Pro#               175- Arg Tyr Phe Asn Gln Leu Ser Thr Gly Leu As - #p Met Val Gly Leu Ala#           190- Ala Asp Trp Leu Thr Ser Thr Ala Asn Thr As - #n Met Phe Thr Tyr Glu#       205- Ile Ala Pro Val Phe Val Leu Leu Glu Tyr Va - #l Thr Leu Lys Lys Met#   220- Arg Glu Ile Ile Gly Trp Pro Gly Gly Ser Gl - #y Asp Gly Ile Phe Ser225                 2 - #30                 2 - #35                 2 -#40- Pro Gly Gly Ala Ile Ser Asn Met Tyr Ala Me - #t Met Ile Ala Arg Phe#               255- Lys Met Phe Pro Glu Val Lys Glu Lys Gly Me - #t Ala Ala Leu Pro Arg#           270- Leu Ile Ala Phe Thr Ser Glu His Ser His Ph - #e Ser Leu Lys Lys Gly#       285- Ala Ala Ala Leu Gly Ile Gly Thr Asp Ser Va - #l Ile Leu Ile Lys Cys#   300- Asp Glu Arg Gly Lys Met Ile Pro Ser Asp Le - #u Glu Arg Arg Ile Leu305                 3 - #10                 3 - #15                 3 -#20- Glu Ala Lys Gln Lys Gly Phe Val Pro Phe Le - #u Val Ser Ala Thr Ala#               335- Gly Thr Thr Val Tyr Gly Ala Phe Asp Pro Le - #u Leu Ala Val Ala Asp#           350- Ile Cys Lys Lys Tyr Lys Ile Trp Met His Va - #l Asp Ala Ala Trp Gly#       365- Gly Gly Leu Leu Met Ser Arg Lys His Lys Tr - #p Lys Leu Ser Gly Val#   380- Glu Arg Ala Asn Ser Val Thr Trp Asn Pro Hi - #s Xaa Met Met Gly Val385                 3 - #90                 3 - #95                 4 -#00- Pro Leu Gln Cys Ser Ala Leu Leu Val Arg Gl - #u Glu Gly Leu Met Gln#               415- Asn Cys Asn Gln Met His Ala Ser Tyr Leu Ph - #e Gln Gln Asp Lys His#           430- Tyr Asp Leu Ser Tyr Asp Thr Gly Asp Lys Al - #a Leu Gln Cys Gly Arg#       445- His Val Asp Val Phe Lys Leu Trp Leu Met Tr - #p Arg Ala Lys Gly Thr#   460- Thr Gly Phe Glu Ala His Val Asp Lys Cys Le - #u Glu Leu Ala Glu Tyr465                 4 - #70                 4 - #75                 4 -#80- Leu Tyr Asn Ile Ile Lys Asn Arg Glu Gly Ty - #r Glu Met Val Phe Asp#               495- Gly Lys Pro Gln His Thr Asn Val Cys Phe Tr - #p Tyr Ile Pro Pro Ser#           510- Leu Arg Thr Leu Glu Asp Asn Glu Glu Arg Me - #t Ser Arg Leu Ser Lys#       525- Val Ala Pro Val Ile Lys Ala Arg Met Met Gl - #u Tyr Gly Thr Thr Met#   540- Val Ser Tyr Gln Pro Leu Gly Asp Lys Val As - #n Phe Phe Arg Met Val545                 5 - #50                 5 - #55                 5 -#60- Ile Ser Asn Pro Ala Ala Thr His Gln Asp Il - #e Asp Phe Leu Ile Glu#               575- Glu Ile Glu Arg Leu Gly Gln Asp Leu#           585- &lt;210&gt; SEQ ID NO 4&lt;211&gt; LENGTH: 585&lt;212&gt; TYPE: PRT&lt;213&gt; ORGANISM: Artificial Sequence&lt;220&gt; FEATURE:#Sequence:ModifiedATION: Description of Artificial hGAD- &lt;400&gt; SEQUENCE: 4- Met Ala Ser Pro Gly Ser Gly Phe Trp Ser Ph - #e Gly Ser Glu Asp Gly#                 15- Ser Gly Asp Ser Glu Asn Pro Gly Thr Ala Ar - #g Ala Trp Cys Gln Val#             30- Ala Gln Lys Phe Thr Gly Gly Ile Gly Asn Ly - #s Leu Cys Ala Leu Leu#         45- Tyr Gly Asp Ala Glu Lys Pro Ala Glu Ser Gl - #y Gly Ser Gln Pro Pro#     60- Arg Ala Ala Ala Arg Lys Ala Ala Cys Ala Cy - #s Asp Gln Lys Pro Cys# 80- Ser Cys Ser Lys Val Asp Val Asn Tyr Ala Ph - #e Leu His Ala Thr Asp#                 95- Leu Leu Pro Ala Cys Asp Gly Glu Arg Pro Th - #r Leu Ala Phe Leu Gln#           110- Asp Val Met Asn Ile Leu Leu Gln Tyr Val Va - #l Lys Ser Phe Asp Arg#       125- Ser Thr Lys Val Ile Asp Phe His Tyr Pro As - #n Glu Leu Leu Gln Glu#   140- Tyr Asn Trp Glu Leu Ala Asp Gln Pro Gln As - #n Leu Glu Glu Ile Leu145                 1 - #50                 1 - #55                 1 -#60- Met His Cys Gln Thr Thr Leu Lys Tyr Ala Il - #e Lys Thr Gly His Pro#               175- Arg Tyr Phe Asn Gln Leu Ser Thr Gly Leu As - #p Met Val Gly Leu Ala#           190- Ala Asp Trp Leu Thr Ser Thr Ala Asn Thr As - #n Met Phe Thr Tyr Glu#       205- Ile Ala Pro Val Phe Val Leu Leu Glu Tyr Va - #l Thr Leu Lys Lys Met#   220- Arg Glu Ile Ile Gly Trp Pro Gly Gly Ser Gl - #y Asp Gly Ile Phe Ser225                 2 - #30                 2 - #35                 2 -#40- Pro Gly Gly Ala Ile Ser Asn Met Tyr Ala Me - #t Met Ile Ala Arg Phe#               255- Lys Met Phe Pro Glu Val Lys Glu Lys Gly Me - #t Ala Ala Leu Pro Arg#           270- Leu Ile Ala Phe Thr Ser Glu His Ser His Ph - #e Ser Leu Lys Lys Gly#       285- Ala Ala Ala Leu Gly Ile Gly Thr Asp Ser Va - #l Ile Leu Ile Lys Cys#   300- Asp Glu Arg Gly Lys Met Ile Pro Ser Asp Le - #u Glu Arg Arg Ile Leu305                 3 - #10                 3 - #15                 3 -#20- Glu Ala Lys Gln Lys Gly Phe Val Pro Phe Le - #u Val Ser Ala Thr Ala#               335- Gly Thr Thr Val Tyr Gly Ala Phe Asp Pro Le - #u Leu Ala Val Ala Asp#           350- Ile Cys Lys Lys Tyr Lys Ile Trp Met His Va - #l Asp Ala Ala Trp Gly#       365- Gly Gly Leu Leu Met Ser Arg Lys His Lys Tr - #p Lys Leu Ser Gly Val#   380- Glu Arg Ala Asn Ser Val Thr Trp Asn Pro Hi - #s Ile Met Met Gly Val385                 3 - #90                 3 - #95                 4 -#00- Pro Leu Gln Cys Ser Ala Leu Leu Val Arg Gl - #u Glu Gly Leu Met Gln#               415- Asn Cys Asn Gln Met His Ala Ser Tyr Leu Ph - #e Gln Gln Asp Lys His#           430- Tyr Asp Leu Ser Tyr Asp Thr Gly Asp Lys Al - #a Leu Gln Cys Gly Arg#       445- His Val Asp Val Phe Lys Leu Trp Leu Met Tr - #p Arg Ala Lys Gly Thr#   460- Thr Gly Phe Glu Ala His Val Asp Lys Cys Le - #u Glu Leu Ala Glu Tyr465                 4 - #70                 4 - #75                 4 -#80- Leu Tyr Asn Ile Ile Lys Asn Arg Glu Gly Ty - #r Glu Met Val Phe Asp#               495- Gly Lys Pro Gln His Thr Asn Val Cys Phe Tr - #p Tyr Ile Pro Pro Ser#           510- Leu Arg Thr Leu Glu Asp Asn Glu Glu Arg Me - #t Ser Arg Leu Ser Lys#       525- Val Ala Pro Val Ile Lys Ala Arg Met Met Gl - #u Tyr Gly Thr Thr Met#   540- Val Ser Tyr Gln Pro Leu Gly Asp Lys Val As - #n Phe Phe Arg Met Val545                 5 - #50                 5 - #55                 5 -#60- Ile Ser Asn Pro Ala Ala Thr His Gln Asp Il - #e Asp Phe Leu Ile Glu#               575- Glu Ile Glu Arg Leu Gly Gln Asp Leu#           585- &lt;210&gt; SEQ ID NO 5&lt;211&gt; LENGTH: 585&lt;212&gt; TYPE: PRT&lt;213&gt; ORGANISM: Artificial Sequence&lt;220&gt; FEATURE:#Sequence:ModifiedATION: Description of Artificial hGAD- &lt;400&gt; SEQUENCE: 5- Met Ala Ser Pro Gly Ser Gly Phe Trp Ser Ph - #e Gly Ser Glu Asp Gly#                 15- Ser Gly Asp Ser Glu Asn Pro Gly Thr Ala Ar - #g Ala Trp Cys Gln Val#             30- Ala Gln Lys Phe Thr Gly Gly Ile Gly Asn Ly - #s Leu Cys Ala Leu Leu#         45- Tyr Gly Asp Ala Glu Lys Pro Ala Glu Ser Gl - #y Gly Ser Gln Pro Pro#     60- Arg Ala Ala Ala Arg Lys Ala Ala Cys Ala Cy - #s Asp Gln Lys Pro Cys# 80- Ser Cys Ser Lys Val Asp Val Asn Tyr Ala Ph - #e Leu His Ala Thr Asp#                 95- Leu Leu Pro Ala Cys Asp Gly Glu Arg Pro Th - #r Leu Ala Phe Leu Gln#           110- Asp Val Met Asn Ile Leu Leu Gln Tyr Val Va - #l Lys Ser Phe Asp Arg#       125- Ser Thr Lys Val Ile Asp Phe His Tyr Pro As - #n Glu Leu Leu Gln Glu#   140- Tyr Asn Trp Glu Leu Ala Asp Gln Pro Gln As - #n Leu Glu Glu Ile Leu145                 1 - #50                 1 - #55                 1 -#60- Met His Cys Gln Thr Thr Leu Lys Tyr Ala Il - #e Lys Thr Gly His Pro#               175- Arg Tyr Phe Asn Gln Leu Ser Thr Gly Leu As - #p Met Val Gly Leu Ala#           190- Ala Asp Trp Leu Thr Ser Thr Ala Asn Thr As - #n Met Phe Thr Tyr Glu#       205- Ile Ala Pro Val Phe Val Leu Leu Glu Tyr Va - #l Thr Leu Lys Lys Met#   220- Arg Glu Ile Ile Gly Trp Pro Gly Gly Ser Gl - #y Asp Gly Ile Phe Ser225                 2 - #30                 2 - #35                 2 -#40- Pro Gly Gly Ala Ile Ser Asn Met Tyr Ala Me - #t Met Ile Ala Arg Phe#               255- Lys Met Phe Pro Glu Val Lys Glu Lys Gly Me - #t Ala Ala Leu Pro Arg#           270- Leu Ile Ala Phe Thr Ser Glu His Ser His Ph - #e Ser Leu Lys Lys Gly#       285- Ala Ala Ala Leu Gly Ile Gly Thr Asp Ser Va - #l Ile Leu Ile Lys Cys#   300- Asp Glu Arg Gly Lys Met Ile Pro Ser Asp Le - #u Glu Arg Arg Ile Leu305                 3 - #10                 3 - #15                 3 -#20- Glu Ala Lys Gln Lys Gly Phe Val Pro Phe Le - #u Val Ser Ala Thr Ala#               335- Gly Thr Thr Val Tyr Gly Ala Phe Asp Pro Le - #u Leu Ala Val Ala Asp#           350- Ile Cys Lys Lys Tyr Lys Ile Trp Met His Va - #l Asp Ala Ala Trp Gly#       365- Gly Gly Leu Leu Met Ser Arg Lys His Lys Tr - #p Lys Leu Ser Gly Val#   380- Glu Arg Ala Asn Ser Val Thr Trp Asn Pro Hi - #s Arg Met Met Gly Val385                 3 - #90                 3 - #95                 4 -#00- Pro Leu Gln Cys Ser Ala Leu Leu Val Arg Gl - #u Glu Gly Leu Met Gln#               415- Asn Cys Asn Gln Met His Ala Ser Tyr Leu Ph - #e Gln Gln Asp Lys His#           430- Tyr Asp Leu Ser Tyr Asp Thr Gly Asp Lys Al - #a Leu Gln Cys Gly Arg#       445- His Val Asp Val Phe Lys Leu Trp Leu Met Tr - #p Arg Ala Lys Gly Thr#   460- Thr Gly Phe Glu Ala His Val Asp Lys Cys Le - #u Glu Leu Ala Glu Tyr465                 4 - #70                 4 - #75                 4 -#80- Leu Tyr Asn Ile Ile Lys Asn Arg Glu Gly Ty - #r Glu Met Val Phe Asp#               495- Gly Lys Pro Gln His Thr Asn Val Cys Phe Tr - #p Tyr Ile Pro Pro Ser#           510- Leu Arg Thr Leu Glu Asp Asn Glu Glu Arg Me - #t Ser Arg Leu Ser Lys#       525- Val Ala Pro Val Ile Lys Ala Arg Met Met Gl - #u Tyr Gly Thr Thr Met#   540- Val Ser Tyr Gln Pro Leu Gly Asp Lys Val As - #n Phe Phe Arg Met Val545                 5 - #50                 5 - #55                 5 -#60- Ile Ser Asn Pro Ala Ala Thr His Gln Asp Il - #e Asp Phe Leu Ile Glu#               575- Glu Ile Glu Arg Leu Gly Gln Asp Leu#           585- &lt;210&gt; SEQ ID NO 6&lt;211&gt; LENGTH: 585&lt;212&gt; TYPE: PRT&lt;213&gt; ORGANISM: Artificial Sequence&lt;220&gt; FEATURE:#Sequence:ModifiedATION: Description of Artificial hGAD- &lt;400&gt; SEQUENCE: 6- Met Ala Ser Pro Gly Ser Gly Phe Trp Ser Ph - #e Gly Ser Glu Asp Gly#                 15- Ser Gly Asp Ser Glu Asn Pro Gly Thr Ala Ar - #g Ala Trp Cys Gln Val#             30- Ala Gln Lys Phe Thr Gly Gly Ile Gly Asn Ly - #s Leu Cys Ala Leu Leu#         45- Tyr Gly Asp Ala Glu Lys Pro Ala Glu Ser Gl - #y Gly Ser Gln Pro Pro#     60- Arg Ala Ala Ala Arg Lys Ala Ala Cys Ala Cy - #s Asp Gln Lys Pro Cys# 80- Ser Cys Ser Lys Val Asp Val Asn Tyr Ala Ph - #e Leu His Ala Thr Asp#                 95- Leu Leu Pro Ala Cys Asp Gly Glu Arg Pro Th - #r Leu Ala Phe Leu Gln#           110- Asp Val Met Asn Ile Leu Leu Gln Tyr Val Va - #l Lys Ser Phe Asp Arg#       125- Ser Thr Lys Val Ile Asp Phe His Tyr Pro As - #n Glu Leu Leu Gln Glu#   140- Tyr Asn Trp Glu Leu Ala Asp Gln Pro Gln As - #n Leu Glu Glu Ile Leu145                 1 - #50                 1 - #55                 1 -#60- Met His Cys Gln Thr Thr Leu Lys Tyr Ala Il - #e Lys Thr Gly His Pro#               175- Arg Tyr Phe Asn Gln Leu Ser Thr Gly Leu As - #p Met Val Gly Leu Ala#           190- Ala Asp Trp Leu Thr Ser Thr Ala Asn Thr As - #n Met Phe Thr Tyr Glu#       205- Ile Ala Pro Val Phe Val Leu Leu Glu Tyr Va - #l Thr Leu Lys Lys Met#   220- Arg Glu Ile Ile Gly Trp Pro Gly Gly Ser Gl - #y Asp Gly Ile Phe Ser225                 2 - #30                 2 - #35                 2 -#40- Pro Gly Gly Ala Ile Ser Asn Met Tyr Ala Me - #t Met Ile Ala Arg Phe#               255- Lys Met Phe Pro Glu Val Lys Glu Lys Gly Me - #t Ala Ala Leu Pro Arg#           270- Leu Ile Ala Phe Thr Ser Glu His Ser His Ph - #e Ser Leu Lys Lys Gly#       285- Ala Ala Ala Leu Gly Ile Gly Thr Asp Ser Va - #l Ile Leu Ile Lys Cys#   300- Asp Glu Arg Gly Lys Met Ile Pro Ser Asp Le - #u Glu Arg Arg Ile Leu305                 3 - #10                 3 - #15                 3 -#20- Glu Ala Lys Gln Lys Gly Phe Val Pro Phe Le - #u Val Ser Ala Thr Ala#               335- Gly Thr Thr Val Tyr Gly Ala Phe Asp Pro Le - #u Leu Ala Val Ala Asp#           350- Ile Cys Lys Lys Tyr Lys Ile Trp Met His Va - #l Asp Ala Ala Trp Gly#       365- Gly Gly Leu Leu Met Ser Arg Lys His Lys Tr - #p Lys Leu Ser Gly Val#   380- Glu Arg Ala Asn Ser Val Thr Trp Asn Pro Hi - #s Gln Met Met Gly Val385                 3 - #90                 3 - #95                 4 -#00- Pro Leu Gln Cys Ser Ala Leu Leu Val Arg Gl - #u Glu Gly Leu Met Gln#               415- Asn Cys Asn Gln Met His Ala Ser Tyr Leu Ph - #e Gln Gln Asp Lys His#           430- Tyr Asp Leu Ser Tyr Asp Thr Gly Asp Lys Al - #a Leu Gln Cys Gly Arg#       445- His Val Asp Val Phe Lys Leu Trp Leu Met Tr - #p Arg Ala Lys Gly Thr#   460- Thr Gly Phe Glu Ala His Val Asp Lys Cys Le - #u Glu Leu Ala Glu Tyr465                 4 - #70                 4 - #75                 4 -#80- Leu Tyr Asn Ile Ile Lys Asn Arg Glu Gly Ty - #r Glu Met Val Phe Asp#               495- Gly Lys Pro Gln His Thr Asn Val Cys Phe Tr - #p Tyr Ile Pro Pro Ser#           510- Leu Arg Thr Leu Glu Asp Asn Glu Glu Arg Me - #t Ser Arg Leu Ser Lys#       525- Val Ala Pro Val Ile Lys Ala Arg Met Met Gl - #u Tyr Gly Thr Thr Met#   540- Val Ser Tyr Gln Pro Leu Gly Asp Lys Val As - #n Phe Phe Arg Met Val545                 5 - #50                 5 - #55                 5 -#60- Ile Ser Asn Pro Ala Ala Thr His Gln Asp Il - #e Asp Phe Leu Ile Glu#               575- Glu Ile Glu Arg Leu Gly Gln Asp Leu#           585- &lt;210&gt; SEQ ID NO 7&lt;211&gt; LENGTH: 585&lt;212&gt; TYPE: PRT&lt;213&gt; ORGANISM: Artificial Sequence&lt;220&gt; FEATURE:#Sequence:ModifiedATION: Description of Artificial hGAD- &lt;400&gt; SEQUENCE: 7- Met Ala Ser Pro Gly Ser Gly Phe Trp Ser Ph - #e Gly Ser Glu Asp Gly#                 15- Ser Gly Asp Ser Glu Asn Pro Gly Thr Ala Ar - #g Ala Trp Cys Gln Val#             30- Ala Gln Lys Phe Thr Gly Gly Ile Gly Asn Ly - #s Leu Cys Ala Leu Leu#         45- Tyr Gly Asp Ala Glu Lys Pro Ala Glu Ser Gl - #y Gly Ser Gln Pro Pro#     60- Arg Ala Ala Ala Arg Lys Ala Ala Cys Ala Cy - #s Asp Gln Lys Pro Cys# 80- Ser Cys Ser Lys Val Asp Val Asn Tyr Ala Ph - #e Leu His Ala Thr Asp#                 95- Leu Leu Pro Ala Cys Asp Gly Glu Arg Pro Th - #r Leu Ala Phe Leu Gln#           110- Asp Val Met Asn Ile Leu Leu Gln Tyr Val Va - #l Lys Ser Phe Asp Arg#       125- Ser Thr Lys Val Ile Asp Phe His Tyr Pro As - #n Glu Leu Leu Gln Glu#   140- Tyr Asn Trp Glu Leu Ala Asp Gln Pro Gln As - #n Leu Glu Glu Ile Leu145                 1 - #50                 1 - #55                 1 -#60- Met His Cys Gln Thr Thr Leu Lys Tyr Ala Il - #e Lys Thr Gly His Pro#               175- Arg Tyr Phe Asn Gln Leu Ser Thr Gly Leu As - #p Met Val Gly Leu Ala#           190- Ala Asp Trp Leu Thr Ser Thr Ala Asn Thr As - #n Met Phe Thr Tyr Glu#       205- Ile Ala Pro Val Phe Val Leu Leu Glu Tyr Va - #l Thr Leu Lys Lys Met#   220- Arg Glu Ile Ile Gly Trp Pro Gly Gly Ser Gl - #y Asp Gly Ile Phe Ser225                 2 - #30                 2 - #35                 2 -#40- Pro Gly Gly Ala Ile Ser Asn Met Tyr Ala Me - #t Met Ile Ala Arg Phe#               255- Lys Met Phe Pro Glu Val Lys Glu Lys Gly Me - #t Ala Ala Leu Pro Arg#           270- Leu Ile Ala Phe Thr Ser Glu His Ser His Ph - #e Ser Leu Lys Lys Gly#       285- Ala Ala Ala Leu Gly Ile Gly Thr Asp Ser Va - #l Ile Leu Ile Lys Cys#   300- Asp Glu Arg Gly Lys Met Ile Pro Ser Asp Le - #u Glu Arg Arg Ile Leu305                 3 - #10                 3 - #15                 3 -#20- Glu Ala Lys Gln Lys Gly Phe Val Pro Phe Le - #u Val Ser Ala Thr Ala#               335- Gly Thr Thr Val Tyr Gly Ala Phe Asp Pro Le - #u Leu Ala Val Ala Asp#           350- Ile Cys Lys Lys Tyr Lys Ile Trp Met His Va - #l Asp Ala Ala Trp Gly#       365- Gly Gly Leu Leu Met Ser Arg Lys His Lys Tr - #p Lys Leu Ser Gly Val#   380- Glu Arg Ala Asn Ser Val Thr Trp Asn Pro Hi - #s His Met Met Gly Val385                 3 - #90                 3 - #95                 4 -#00- Pro Leu Gln Cys Ser Ala Leu Leu Val Arg Gl - #u Glu Gly Leu Met Gln#               415- Asn Cys Asn Gln Met His Ala Ser Tyr Leu Ph - #e Gln Gln Asp Lys His#           430- Tyr Asp Leu Ser Tyr Asp Thr Gly Asp Lys Al - #a Leu Gln Cys Gly Arg#       445- His Val Asp Val Phe Lys Leu Trp Leu Met Tr - #p Arg Ala Lys Gly Thr#   460- Thr Gly Phe Glu Ala His Val Asp Lys Cys Le - #u Glu Leu Ala Glu Tyr465                 4 - #70                 4 - #75                 4 -#80- Leu Tyr Asn Ile Ile Lys Asn Arg Glu Gly Ty - #r Glu Met Val Phe Asp#               495- Gly Lys Pro Gln His Thr Asn Val Cys Phe Tr - #p Tyr Ile Pro Pro Ser#           510- Leu Arg Thr Leu Glu Asp Asn Glu Glu Arg Me - #t Ser Arg Leu Ser Lys#       525- Val Ala Pro Val Ile Lys Ala Arg Met Met Gl - #u Tyr Gly Thr Thr Met#   540- Val Ser Tyr Gln Pro Leu Gly Asp Lys Val As - #n Phe Phe Arg Met Val545                 5 - #50                 5 - #55                 5 -#60- Ile Ser Asn Pro Ala Ala Thr His Gln Asp Il - #e Asp Phe Leu Ile Glu#               575- Glu Ile Glu Arg Leu Gly Gln Asp Leu#           585- &lt;210&gt; SEQ ID NO 8&lt;211&gt; LENGTH: 585&lt;212&gt; TYPE: PRT&lt;213&gt; ORGANISM: Artificial Sequence&lt;220&gt; FEATURE:#Sequence:ModifiedATION: Description of Artificial hGAD- &lt;400&gt; SEQUENCE: 8- Met Ala Ser Pro Gly Ser Gly Phe Trp Ser Ph - #e Gly Ser Glu Asp Gly#                 15- Ser Gly Asp Ser Glu Asn Pro Gly Thr Ala Ar - #g Ala Trp Cys Gln Val#             30- Ala Gln Lys Phe Thr Gly Gly Ile Gly Asn Ly - #s Leu Cys Ala Leu Leu#         45- Tyr Gly Asp Ala Glu Lys Pro Ala Glu Ser Gl - #y Gly Ser Gln Pro Pro#     60- Arg Ala Ala Ala Arg Lys Ala Ala Cys Ala Cy - #s Asp Gln Lys Pro Cys# 80- Ser Cys Ser Lys Val Asp Val Asn Tyr Ala Ph - #e Leu His Ala Thr Asp#                 95- Leu Leu Pro Ala Cys Asp Gly Glu Arg Pro Th - #r Leu Ala Phe Leu Gln#           110- Asp Val Met Asn Ile Leu Leu Gln Tyr Val Va - #l Lys Ser Phe Asp Arg#       125- Ser Thr Lys Val Ile Asp Phe His Tyr Pro As - #n Glu Leu Leu Gln Glu#   140- Tyr Asn Trp Glu Leu Ala Asp Gln Pro Gln As - #n Leu Glu Glu Ile Leu145                 1 - #50                 1 - #55                 1 -#60- Met His Cys Gln Thr Thr Leu Lys Tyr Ala Il - #e Lys Thr Gly His Pro#               175- Arg Tyr Phe Asn Gln Leu Ser Thr Gly Leu As - #p Met Val Gly Leu Ala#           190- Ala Asp Trp Leu Thr Ser Thr Ala Asn Thr As - #n Met Phe Thr Tyr Glu#       205- Ile Ala Pro Val Phe Val Leu Leu Glu Tyr Va - #l Thr Leu Lys Lys Met#   220- Arg Glu Ile Ile Gly Trp Pro Gly Gly Ser Gl - #y Asp Gly Ile Phe Ser225                 2 - #30                 2 - #35                 2 -#40- Pro Gly Gly Ala Ile Ser Asn Met Tyr Ala Me - #t Met Ile Ala Arg Phe#               255- Lys Met Phe Pro Glu Val Lys Glu Lys Gly Me - #t Ala Ala Leu Pro Arg#           270- Leu Ile Ala Phe Thr Ser Glu His Ser His Ph - #e Ser Leu Lys Lys Gly#       285- Ala Ala Ala Leu Gly Ile Gly Thr Asp Ser Va - #l Ile Leu Ile Lys Cys#   300- Asp Glu Arg Gly Lys Met Ile Pro Ser Asp Le - #u Glu Arg Arg Ile Leu305                 3 - #10                 3 - #15                 3 -#20- Glu Ala Lys Gln Lys Gly Phe Val Pro Phe Le - #u Val Ser Ala Thr Ala#               335- Gly Thr Thr Val Tyr Gly Ala Phe Asp Pro Le - #u Leu Ala Val Ala Asp#           350- Ile Cys Lys Lys Tyr Lys Ile Trp Met His Va - #l Asp Ala Ala Trp Gly#       365- Gly Gly Leu Leu Met Ser Arg Lys His Lys Tr - #p Lys Leu Ser Gly Val#   380- Glu Arg Ala Asn Ser Val Thr Trp Asn Pro Hi - #s Gly Met Met Gly Val385                 3 - #90                 3 - #95                 4 -#00- Pro Leu Gln Cys Ser Ala Leu Leu Val Arg Gl - #u Glu Gly Leu Met Gln#               415- Asn Cys Asn Gln Met His Ala Ser Tyr Leu Ph - #e Gln Gln Asp Lys His#           430- Tyr Asp Leu Ser Tyr Asp Thr Gly Asp Lys Al - #a Leu Gln Cys Gly Arg#       445- His Val Asp Val Phe Lys Leu Trp Leu Met Tr - #p Arg Ala Lys Gly Thr#   460- Thr Gly Phe Glu Ala His Val Asp Lys Cys Le - #u Glu Leu Ala Glu Tyr465                 4 - #70                 4 - #75                 4 -#80- Leu Tyr Asn Ile Ile Lys Asn Arg Glu Gly Ty - #r Glu Met Val Phe Asp#               495- Gly Lys Pro Gln His Thr Asn Val Cys Phe Tr - #p Tyr Ile Pro Pro Ser#           510- Leu Arg Thr Leu Glu Asp Asn Glu Glu Arg Me - #t Ser Arg Leu Ser Lys#       525- Val Ala Pro Val Ile Lys Ala Arg Met Met Gl - #u Tyr Gly Thr Thr Met#   540- Val Ser Tyr Gln Pro Leu Gly Asp Lys Val As - #n Phe Phe Arg Met Val545                 5 - #50                 5 - #55                 5 -#60- Ile Ser Asn Pro Ala Ala Thr His Gln Asp Il - #e Asp Phe Leu Ile Glu#               575- Glu Ile Glu Arg Leu Gly Gln Asp Leu#           585- &lt;210&gt; SEQ ID NO 9&lt;211&gt; LENGTH: 10&lt;212&gt; TYPE: PRT&lt;213&gt; ORGANISM: Homo sapiens&lt;220&gt; FEATURE:#Sequence:PLP bindingON: Description of Artificial site of hGAD65- &lt;400&gt; SEQUENCE: 9- Thr Trp Asn Pro His Lys Met Met Gly Val#                 10- &lt;210&gt; SEQ ID NO 10&lt;211&gt; LENGTH: 10&lt;212&gt; TYPE: PRT&lt;213&gt; ORGANISM: Artificial Sequence&lt;220&gt; FEATURE:#Sequence:Mutant PLPION: Description of Artificial binding site of hGAD65- &lt;400&gt; SEQUENCE: 10- Thr Trp Asn Pro His Arg Met Met Gly Val#                 10- &lt;210&gt; SEQ ID NO 11&lt;211&gt; LENGTH: 10&lt;212&gt; TYPE: PRT&lt;213&gt; ORGANISM: Artificial Sequence&lt;220&gt; FEATURE:#Sequence:Mutant PLPION: Description of Artificial binding site of hGAD65- &lt;400&gt; SEQUENCE: 11- Thr Trp Asn Pro His Ile Met Met Gly Val#                 10- &lt;210&gt; SEQ ID NO 12&lt;211&gt; LENGTH: 10&lt;212&gt; TYPE: PRT&lt;213&gt; ORGANISM: Artificial Sequence&lt;220&gt; FEATURE:#Sequence:Mutant PLPION: Description of Artificial binding site of hGAD65- &lt;400&gt; SEQUENCE: 12- Thr Trp Asn Pro His Gln Met Met Gly Val#                 10- &lt;210&gt; SEQ ID NO 13&lt;211&gt; LENGTH: 10&lt;212&gt; TYPE: PRT&lt;213&gt; ORGANISM: Artificial Sequence&lt;220&gt; FEATURE:#Sequence:Mutant PLPION: Description of Artificial binding site of hGAD65- &lt;400&gt; SEQUENCE: 13- Thr Trp Asn Pro His His Met Met Gly Val#                 10- &lt;210&gt; SEQ ID NO 14&lt;211&gt; LENGTH: 10&lt;212&gt; TYPE: PRT&lt;213&gt; ORGANISM: Artificial Sequence&lt;220&gt; FEATURE:#Sequence:Mutant PLPION: Description of Artificial binding site of hGAD65- &lt;400&gt; SEQUENCE: 14- Thr Trp Asn Pro His Gly Met Met Gly Val#                 10__________________________________________________________________________