1cvr
From Proteopedia
CRYSTAL STRUCTURE OF THE ARG SPECIFIC CYSTEINE PROTEINASE GINGIPAIN R (RGPB)
Overview
Gingipains are cysteine proteinases acting as key virulence factors of the bacterium Porphyromonas gingivalis, the major pathogen in periodontal disease. The 1.5 and 2.0 A crystal structures of free and D-Phe-Phe-Arg-chloromethylketone-inhibited gingipain R reveal a 435-residue, single-polypeptide chain organized into a catalytic and an immunoglobulin-like domain. The catalytic domain is subdivided into two subdomains comprising four- and six-stranded beta-sheets sandwiched by alpha-helices. Each subdomain bears topological similarities to the p20-p10 heterodimer of caspase-1. The second subdomain harbours the Cys-His catalytic diad and a nearby Glu arranged around the S1 specificity pocket, which carries an Asp residue to enforce preference for Arg-P1 residues. This gingipain R structure is an excellent template for the rational design of drugs with a potential to cure and prevent periodontitis. Here we show the binding mode of an arginine-containing inhibitor in the active-site, thus identifying major interaction sites defining a suitable pharmacophor.
About this Structure
1CVR is a Single protein structure of sequence from Porphyromonas gingivalis. Full crystallographic information is available from OCA.
Reference
Crystal structure of gingipain R: an Arg-specific bacterial cysteine proteinase with a caspase-like fold., Eichinger A, Beisel HG, Jacob U, Huber R, Medrano FJ, Banbula A, Potempa J, Travis J, Bode W, EMBO J. 1999 Oct 15;18(20):5453-62. PMID:10523290 Page seeded by OCA on Fri May 2 13:09:46 2008
