1n64: Difference between revisions
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|RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1n64 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1n64 OCA], [http://www.ebi.ac.uk/pdbsum/1n64 PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1n64 RCSB]</span> | |||
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[[Category: antibody peptide complex]] | [[Category: antibody peptide complex]] | ||
''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 22:25:55 2008'' | ||
Revision as of 22:25, 30 March 2008
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| , resolution 2.34Å | |||||||
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| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
Crystal structure analysis of the immunodominant antigenic site on Hepatitis C virus protein bound to mAb 19D9D6
OverviewOverview
The first crystal structure of a complex between a hepatitis C virus (HCV) core protein-derived peptide (residues 13-40) and the Ab fragment of a murine mAb (19D9D6) has been solved, allowing determination of the recognized epitope and elucidation of its conformation. This Ab, raised against the first 120 residues of the core protein, recognizes core particles and strongly competes with anticore human Abs, suggesting that it is highly representative of the human anti-HCV core response. Its epitope lies within the first 45 aa of the protein, the major antigenic segment of core recognized both by murine and human Abs. Surprisingly, the recognized epitope (29-37: QIVGGVYLL) has an unusual preponderance of hydrophobic residues, some of which are buried in a small hydrophobic core in the nuclear magnetic resonance structure of the peptide (2-45) in solution, suggesting that the Ab may induce a structural rearrangement upon recognition. The flexibility may reside entirely within the Ag, since the Fab'-peptide complex structure at 2.34 A shows that the Ab binding site is hardly perturbed by complexation. Given that the recognized residues are unlikely to be solvent exposed, we are left with the interesting possibility that Ab-core interactions may take place in a nonaqueous environment.
About this StructureAbout this Structure
1N64 is a Single protein structure of sequence from Mus musculus. Full crystallographic information is available from OCA.
ReferenceReference
Crystal structure of a hydrophobic immunodominant antigenic site on hepatitis C virus core protein complexed to monoclonal antibody 19D9D6., Menez R, Bossus M, Muller BH, Sibai G, Dalbon P, Ducancel F, Jolivet-Reynaud C, Stura EA, J Immunol. 2003 Feb 15;170(4):1917-24. PMID:12574359
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