New insights into the regulation of the blood clotting cascade derived from the X-ray crystal structure of bovine meizothrombin des F1 in complex with PPACK.Martin, P.D., Malkowski, M.G., Box, J., Esmon, C.T., Edwards, B.F.
(1997) Structure 5: 1681-1693
- PubMed: 9438869
- DOI: https://doi.org/10.1016/s0969-2126(97)00314-6
- Primary Citation of Related Structures:
- PubMed Abstract:
The conversion of prothrombin to thrombin by factor Xa is the penultimate step in the blood clotting cascade. In vivo, where the conversion occurs primarily on activated platelets in association with factor Va and Ca2+ ions, meizothrombin is the major intermediate of the two step reaction. Meizothrombin rapidly loses the fragment 1 domain (F1) by autolysis to become meizothrombin des F1 (mzTBN-F1). The physiological properties of mzTBN-F1 differ dramatically from those of thrombin due to the presence of prothrombin fragment 2 (F2), which remains covalently attached to the activated thrombin domain in mzTBN-F1.
Department of Biochemistry and Molecular Biology, Wayne State University, Detroit, MI 48201, USA.