1cr9

CRYSTAL STRUCTURE OF THE ANTI-PRION FAB 3F4

spinqualitylabelsall models 1cr9, resolution 2.00Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1cr9 is a 2 chain structure with sequence from Mus musculus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMed The X-ray crystallographic structures of the anti-Syrian hamster prion protein (SHaPrP) monoclonal Fab 3F4 alone, as well as the complex with its cognate peptide epitope (SHaPrP 104-113), have been determined to atomic resolution. The conformation of the decapeptide is an Omega-loop. There are substantial alterations in the antibody combining region upon epitope binding. The peptide binds in a U-shaped groove on the Fab surface, with the two specificity determinants, Met109 and Met112, penetrating deeply into separate hydrophobic cavities formed by the heavy and light chain complementarity-determining regions. In addition to the numerous contacts between the Fab and the peptide, two intrapeptide hydrogen bonds are observed, perhaps indicating the structure bound to the Fab exists transiently in solution. This provides the first structural information on a portion of the PrP N-terminal region observed to be flexible in the NMR studies of SHPrP 90-231, SHaPrP 29-231 and mouse PrP 23-231. Antibody characterization of the antigenic surfaces of PrPC and PrPSc identifies this flexible region as a component of the conformational rearrangement that is an essential feature of prion disease. Antibody binding defines a structure for an epitope that participates in the PrPC-->PrPSc conformational change.,Kanyo ZF, Pan KM, Williamson RA, Burton DR, Prusiner SB, Fletterick RJ, Cohen FE J Mol Biol. 1999 Nov 5;293(4):855-63. PMID:10543972 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Antibody 3D structures

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