Download MendeleyCrystal Structure of the GpIbalpha-Thrombin Complex Essential for Platelet Aggregation
Dumas, J.J., Kumar, R., Seehra, J., Somers, W.S., Mosyak, L.(2003) Science 301: 222-226
- PubMed: 12855811
- DOI: https://doi.org/10.1126/science.1083917
- Primary Citation of Related Structures:
1P8V - PubMed Abstract:
Direct interaction between platelet receptor glycoprotein Ibalpha (GpIbalpha) and thrombin is required for platelet aggregation and activation at sites of vascular injury. Abnormal GpIbalpha-thrombin binding is associated with many pathological conditions,including occlusive arterial thrombosis and bleeding disorders. The crystal structure of the GpIbalpha-thrombin complex at 2.6 angstrom resolution reveals simultaneous interactions of GpIbalpha with exosite I of one thrombin molecule,and with exosite II of a second thrombin molecule. In the crystal lattice,the periodic arrangement of GpIbalpha-thrombin complexes mirrors a scaffold that could serve as a driving force for tight platelet adhesion. The details of these interactions reconcile GpIbalpha-thrombin binding modes that are presently controversial,highlighting two distinct interfaces that are potential targets for development of novel antithrombotic drugs.
Organizational Affiliation:
Department of Chemical and Screening Sciences, Wyeth, 200 Cambridge Park Drive, Cambridge, MA 02140, USA.
