2gi7

From Proteopedia

Jump to: navigation, search


2gi7, resolution 2.40Å ()
Ligands: , ,
Gene: Human (Homo sapiens)
Resources: FirstGlance, OCA, RCSB, PDBsum
Coordinates: save as pdb, mmCIF, xml



Crystal structure of human platelet Glycoprotein VI (GPVI)

Publication Abstract from PubMed

Activation of circulating platelets by exposed vessel wall collagen is a primary step in the pathogenesis of heart attack and stroke, and drugs to block platelet activation have successfully reduced cardiovascular morbidity and mortality. In humans and mice, collagen activation of platelets is mediated by glycoprotein VI (GPVI), a receptor that is homologous to immune receptors but bears little sequence similarity to known matrix protein adhesion receptors. Here we present the crystal structure of the collagen-binding domain of human GPVI and characterize its interaction with a collagen-related peptide. Like related immune receptors, GPVI contains 2 immunoglobulin-like domains arranged in a perpendicular orientation. Significantly, GPVI forms a back-to-back dimer in the crystal, an arrangement that could explain data previously obtained from cell-surface GPVI inhibition studies. Docking algorithms identify 2 parallel grooves on the GPVI dimer surface as collagen-binding sites, and the orientation and spacing of these grooves precisely match the dimensions of an intact collagen fiber. These findings provide a structural basis for the ability of an immune-type receptor to generate signaling responses to collagen and for the development of GPVI inhibitors as new therapies for human cardiovascular disease.

Structural basis for platelet collagen responses by the immune-type receptor glycoprotein VI., Horii K, Kahn ML, Herr AB, Blood. 2006 Aug 1;108(3):936-42. PMID:16861347

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

About this Structure

2gi7 is a 2 chain structure with sequence from Homo sapiens. Full crystallographic information is available from OCA.

Reference

  • Horii K, Kahn ML, Herr AB. Structural basis for platelet collagen responses by the immune-type receptor glycoprotein VI. Blood. 2006 Aug 1;108(3):936-42. PMID:16861347 doi:108/3/936

Proteopedia Page Contributors and Editors (what is this?)

OCA

Personal tools