CATH Classification

Domain Context

CATH Clusters

Superfamily Trypsin-like serine proteases
Functional Family Coagulation factor X

Enzyme Information

3.4.21.6
Coagulation factor Xa.
based on mapping to UniProt P00743
Selective cleavage of Arg-|-Thr and then Arg-|-Ile bonds in prothrombin to form thrombin.
-!- A blood coagulation factor formed from the proenzyme factor X by limited proteolysis. -!- Factor X is a glycoprotein composed of a heavy chain and a light chain, which are generated from a precursor protein by the excision of the tripeptide RKR and held together by one or more disulfide bonds. -!- The activated factor Xa converts prothrombin to thrombin in the presence of factor Va, Ca(2+) and phospholipids. -!- Scutelarin (EC 3.4.21.60) has similar specificity, but does not require factor Va. -!- Belongs to peptidase family S1.

UniProtKB Entries (2)

P17726
TAP_ORNMO
Ornithodoros moubata
Tick anticoagulant peptide
P00743
FA10_BOVIN
Bos taurus
Coagulation factor X

PDB Structure

PDB 1KIG
External Links
Method X-RAY DIFFRACTION
Organism Saccharomyces
Primary Citation
Unexpected binding mode of tick anticoagulant peptide complexed to bovine factor Xa.
Wei, A., Alexander, R.S., Duke, J., Ross, H., Rosenfeld, S.A., Chang, C.H.
J.Mol.Biol.