Toggle Main Menu Toggle Search

Open Access padlockePrints

Molecular evolution of the vertebrate blood coagulation network

Lookup NU author(s): Professor Robert Hirt

Downloads

Full text for this publication is not currently held within this repository. Alternative links are provided below where available.


Abstract

In mammalian blood coagulation 5 proteases, factor VII (FVII), factor IX (FIX), factor X (FX), protein C (PC) and prothrombin act with two cofactors factor V and factor VIII to control the generation of fibrin. Biochemical evidence and molecular cloning data have previously indicated that blood coagulation involving tissue factor, prothrombin and fibrinogen is present in all vertebrates. Using degenerate RT-PCR we have isolated and characterized novel cDNAs with sequence identity to the blood coagulation serine proteases and cofactors from chicken and the puffer fish (Fugu rubripes). Sequence alignments, phylogenetic and comparative sequence analysis all support the existence of the Gla-EGF1-EGF2-SP domain serine proteases FVII, FIX, FX, PC and the A1-A2-B-A3-C1-C2 domain protein cofactors FV and FVIII in these species. These results strongly suggest that the blood coagulation network is present in all jawed vertebrates and evolved before the divergence of tetrapods and teleosts over 430 million years ago; and that vertebrate blood coagulation may have benefited from two rounds of gene or whole genome duplication. Sequences identified in Fugu coding for additional FVII-like, FIX-like and PC-like sequences support the possibility of further tandem and large-scale duplications in teleosts. Comparative sequence analyses of amino acid residues in the active site region suggest these additional sequences have evolved new and as yet unknown functions.


Publication metadata

Author(s): Hirt RP; Davidson CJ; Lal K; Snell P; Elgar G; Tuddenham EG; McVey JH

Publication type: Article

Publication status: Published

Journal: Thrombosis and Haemostasis

Year: 2003

Volume: 89

Issue: 3

Pages: 420-428

ISSN (print): 0340-6245

Publisher: Schattauer GmbH

Notes: 0340-6245 Journal Article


Actions

Find at Newcastle University icon    Link to this publication


Share