F9 Antibody – Mouse Monoclonal

F9: Factor IX is a vitamin K-dependent plasma protein that participates in the intrinsic pathway of blood coagulation by converting factor X to its active form in the presence of Ca(2+) ions, phospholipids, and factor VIIIa. Defects in F9 are the cause of recessive X-linked hemophilia B (HEMB); also known as Christmas disease. Mutations in position 43 (Oxford-3, San Dimas) and 46 (Cambridge) prevents cleavage of the propeptide, mutation in position 93 (Alabama) probably fails to bind to cell membranes, mutation in position 191 (Chapel-Hill) or in position 226 (Nagoya OR Hilo) prevent cleavage of the activation peptide. Defects in F9 are the cause of thrombophilia due to factor IX defect (THPH8). A hemostatic disorder characterized by a tendency to thrombosis. Belongs to the peptidase S1 family.

Protein type: Secreted; Protease; Secreted, signal peptide; EC 3.4.21.22

Chromosomal Location of Human Ortholog: Xq27.1-q27.2

Cellular Component: Golgi lumen; endoplasmic reticulum lumen; plasma membrane; extracellular region

Molecular Function: serine-type endopeptidase activity; calcium ion binding

Biological Process: blood coagulation, extrinsic pathway; cellular protein metabolic process; post-translational protein modification; blood coagulation; proteolysis; peptidyl-glutamic acid carboxylation; blood coagulation, intrinsic pathway

Disease: Hemophilia B; Thrombophilia, X-linked, Due To Factor Ix Defect; Coumarin Resistance