1axt: Difference between revisions
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[[Image:1axt.gif|left|200px]] | [[Image:1axt.gif|left|200px]] | ||
'''IMMUNE VERSUS NATURAL SELECTION: ANTIBODY ALDOLASES WITH THE RATES OF NATURAL ENZYMES''' | {{Structure | ||
|PDB= 1axt |SIZE=350|CAPTION= <scene name='initialview01'>1axt</scene>, resolution 2.15Å | |||
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|LIGAND= | |||
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'''IMMUNE VERSUS NATURAL SELECTION: ANTIBODY ALDOLASES WITH THE RATES OF NATURAL ENZYMES''' | |||
==Overview== | ==Overview== | ||
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==About this Structure== | ==About this Structure== | ||
1AXT is a [ | 1AXT is a [[Protein complex]] structure of sequences from [http://en.wikipedia.org/wiki/Mus_musculus Mus musculus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1AXT OCA]. | ||
==Reference== | ==Reference== | ||
Immune versus natural selection: antibody aldolases with enzymic rates but broader scope., Barbas CF 3rd, Heine A, Zhong G, Hoffmann T, Gramatikova S, Bjornestedt R, List B, Anderson J, Stura EA, Wilson IA, Lerner RA, Science. 1997 Dec 19;278(5346):2085-92. PMID:[http:// | Immune versus natural selection: antibody aldolases with enzymic rates but broader scope., Barbas CF 3rd, Heine A, Zhong G, Hoffmann T, Gramatikova S, Bjornestedt R, List B, Anderson J, Stura EA, Wilson IA, Lerner RA, Science. 1997 Dec 19;278(5346):2085-92. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/9405338 9405338] | ||
[[Category: Mus musculus]] | [[Category: Mus musculus]] | ||
[[Category: Protein complex]] | [[Category: Protein complex]] | ||
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[[Category: Wilson, I A.]] | [[Category: Wilson, I A.]] | ||
[[Category: aldolase reaction]] | [[Category: aldolase reaction]] | ||
[[Category: antibody | [[Category: antibody fabs']] | ||
[[Category: catalyst]] | [[Category: catalyst]] | ||
[[Category: immunoglobulin]] | [[Category: immunoglobulin]] | ||
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 10:03:37 2008'' | ||
Revision as of 11:03, 20 March 2008
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IMMUNE VERSUS NATURAL SELECTION: ANTIBODY ALDOLASES WITH THE RATES OF NATURAL ENZYMES
OverviewOverview
Structural and mechanistic studies show that when the selection criteria of the immune system are changed, catalytic antibodies that have the efficiency of natural enzymes evolve, but the catalytic antibodies are much more accepting of a wide range of substrates. The catalytic antibodies were prepared by reactive immunization, a process whereby the selection criteria of the immune system are changed from simple binding to chemical reactivity. This process yielded aldolase catalytic antibodies that approximated the rate acceleration of the natural enzyme used in glycolysis. Unlike the natural enzyme, however, the antibody aldolases catalyzed a variety of aldol reactions and decarboxylations. The crystal structure of one of these antibodies identified the reactive lysine residue that was selected in the immunization process. This lysine is deeply buried in a hydrophobic pocket at the base of the binding site, thereby accounting for its perturbed pKa.
About this StructureAbout this Structure
1AXT is a Protein complex structure of sequences from Mus musculus. Full crystallographic information is available from OCA.
ReferenceReference
Immune versus natural selection: antibody aldolases with enzymic rates but broader scope., Barbas CF 3rd, Heine A, Zhong G, Hoffmann T, Gramatikova S, Bjornestedt R, List B, Anderson J, Stura EA, Wilson IA, Lerner RA, Science. 1997 Dec 19;278(5346):2085-92. PMID:9405338
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