1kno
From Proteopedia
| Line 1: | Line 1: | ||
| - | [[Image:1kno.gif|left|200px]] | + | [[Image:1kno.gif|left|200px]] |
| - | + | ||
| - | '''CRYSTAL STRUCTURE OF THE COMPLEX OF A CATALYTIC ANTIBODY FAB WITH A TRANSITION STATE ANALOG: STRUCTURAL SIMILARITIES IN ESTERASE-LIKE ABZYMES''' | + | {{Structure |
| + | |PDB= 1kno |SIZE=350|CAPTION= <scene name='initialview01'>1kno</scene>, resolution 3.2Å | ||
| + | |SITE= | ||
| + | |LIGAND= <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene> and <scene name='pdbligand=PNP:METHYL-PHOSPHONIC ACID MONO-(4-NITRO-PHENYL) ESTER'>PNP</scene> | ||
| + | |ACTIVITY= | ||
| + | |GENE= | ||
| + | }} | ||
| + | |||
| + | '''CRYSTAL STRUCTURE OF THE COMPLEX OF A CATALYTIC ANTIBODY FAB WITH A TRANSITION STATE ANALOG: STRUCTURAL SIMILARITIES IN ESTERASE-LIKE ABZYMES''' | ||
| + | |||
==Overview== | ==Overview== | ||
| Line 7: | Line 16: | ||
==About this Structure== | ==About this Structure== | ||
| - | 1KNO is a [ | + | 1KNO 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=1KNO OCA]. |
==Reference== | ==Reference== | ||
| - | 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:[http:// | + | 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:[http://www.ncbi.nlm.nih.gov/pubmed/8524836 8524836] |
[[Category: Mus musculus]] | [[Category: Mus musculus]] | ||
[[Category: Protein complex]] | [[Category: Protein complex]] | ||
| Line 20: | Line 29: | ||
[[Category: catalytic antibody]] | [[Category: catalytic antibody]] | ||
| - | ''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 12:19:47 2008'' |
Revision as of 10:19, 20 March 2008
| |||||||
| , resolution 3.2Å | |||||||
|---|---|---|---|---|---|---|---|
| Ligands: | and | ||||||
| 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
Overview
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 Structure
1KNO is a Protein complex structure of sequences from Mus musculus. Full crystallographic information is available from OCA.
Reference
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
Page seeded by OCA on Thu Mar 20 12:19:47 2008
