F3 Human Recombinant Protein

This gene encodes coagulation factor III which is a cell surface glycoprotein. This factor enables cells to initiate the blood coagulation cascades, and it functions as the high-affinity receptor for the coagulation factor VII. The resulting complex provides a catalytic event that is responsible for initiation of the coagulation protease cascades by specific limited proteolysis. Unlike the other cofactors of these protease cascades, which circulate as nonfunctional precursors, this factor is a potent initiator that is fully functional when expressed on cell surfaces. There are 3 distinct domains of this factor: extracellular, transmembrane, and cytoplasmic. This protein is the only one in the coagulation pathway for which a congenital deficiency has not been described. Alternate splicing results in multiple transcript variants.[provided by RefSeq, May 2010]

F3: Initiates blood coagulation by forming a complex with circulating factor VII or VIIa. The [TF:VIIa] complex activates factors IX or X by specific limited protolysis. TF plays a role in normal hemostasis by initiating the cell-surface assembly and propagation of the coagulation protease cascade. Interacts with HSPE; the interaction, inhibited by heparin, promotes the generation of activated factor X and activates coagulation in the presence of activated factor VII. TF expression is highly dependent upon cell type. TF can also be induced by the inflammatory mediators interleukin 1 and TNF-alpha, as well as by endotoxin, to appear on monocytes and vascular endothelial cells as a component of cellular immune response. Lung, placenta and pancreas. Belongs to the tissue factor family. 2 isoforms of the human protein are produced by alternative splicing.

Protein type: Cell surface; Membrane protein, integral

Chromosomal Location of Human Ortholog: 1p22-p21

Cellular Component: cell surface; extracellular matrix; extracellular space; plasma membrane

Molecular Function: hematopoietin/interferon-class (D200-domain) cytokine receptor activity; phospholipid binding; protease binding; protein binding; serine-type endopeptidase activity

Biological Process: activation of blood coagulation via clotting cascade; activation of plasma proteins during acute inflammatory response; blood coagulation; blood coagulation, extrinsic pathway; caspase activation; cytokine and chemokine mediated signaling pathway; positive regulation of angiogenesis; positive regulation of cell migration; positive regulation of endothelial cell proliferation; positive regulation of positive chemotaxis; positive regulation of protein kinase B signaling cascade; protein processing