1kno: Difference between revisions
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|PDB= 1kno |SIZE=350|CAPTION= <scene name='initialview01'>1kno</scene>, resolution 3.2Å | |PDB= 1kno |SIZE=350|CAPTION= <scene name='initialview01'>1kno</scene>, resolution 3.2Å | ||
|SITE= | |SITE= | ||
|LIGAND= | |LIGAND= <scene name='pdbligand=PNP:METHYL-PHOSPHONIC+ACID+MONO-(4-NITRO-PHENYL)+ESTER'>PNP</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene> | ||
|ACTIVITY= | |ACTIVITY= | ||
|GENE= | |GENE= | ||
|DOMAIN= | |||
|RELATEDENTRY= | |||
|RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1kno FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1kno OCA], [http://www.ebi.ac.uk/pdbsum/1kno PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1kno RCSB]</span> | |||
}} | }} | ||
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[[Category: Gigant, B.]] | [[Category: Gigant, B.]] | ||
[[Category: Knossow, M.]] | [[Category: Knossow, M.]] | ||
[[Category: catalytic antibody]] | [[Category: catalytic antibody]] | ||
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Mar 30 21:51:01 2008'' | ||
Revision as of 21:51, 30 March 2008
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| , resolution 3.2Å | |||||||
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| Ligands: | , | ||||||
| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
CRYSTAL STRUCTURE OF THE COMPLEX OF A CATALYTIC ANTIBODY FAB WITH A TRANSITION STATE ANALOG: STRUCTURAL SIMILARITIES IN ESTERASE-LIKE ABZYMES
OverviewOverview
The x-ray structure of the complex of a catalytic antibody Fab fragment with a phosphonate transition-state analog has been determined. The antibody (CNJ206) catalyzes the hydrolysis of p-nitrophenyl esters with significant rate enhancement and substrate specificity. Comparison of this structure with that of the uncomplexed Fab fragment suggests hapten-induced conformational changes: the shape of the combining site changes from a shallow groove in the uncomplexed Fab to a deep pocket where the hapten is buried. Three hydrogen-bond donors appear to stabilize the charged phosphonate group of the hapten: two NH groups of the heavy (H) chain complementarity-determining region 3 (H3 CDR) polypeptide chain and the side-chain of histidine-H35 in the H chain (His-H35) in the H1 CDR. The combining site shows striking structural similarities to that of antibody 17E8, which also has esterase activity. Both catalytic antibody ("abzyme") structures suggest that oxyanion stabilization plays a significant role in their rate acceleration. Additional catalytic groups that improve efficiency are not necessarily induced by the eliciting hapten; these groups may occur because of the variability in the combining sites of different monoclonal antibodies that bind to the same hapten.
About this StructureAbout this Structure
1KNO is a Protein complex structure of sequences from Mus musculus. Full crystallographic information is available from OCA.
ReferenceReference
Crystal structure of the complex of a catalytic antibody Fab fragment with a transition state analog: structural similarities in esterase-like catalytic antibodies., Charbonnier JB, Carpenter E, Gigant B, Golinelli-Pimpaneau B, Eshhar Z, Green BS, Knossow M, Proc Natl Acad Sci U S A. 1995 Dec 5;92(25):11721-5. PMID:8524836
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