Coagulation Factor XIII A1 Polypeptide (F13A1)

F13-A1; FXIIIA1; Protein-glutamine gamma-glutamyltransferase A chain; Transglutaminase A chain; Coagulation factor XIII A chain
Coagulation Factor XIII A1 Polypeptide (F13A1)
coagulation factor XIII A subunit. Coagulation factor XIII is the last zymogen to become activated in the blood coagulation cascade. Plasma factor XIII is a heterotetramer composed of 2 A subunits and 2 B subunits. The A subunits have catalytic function, and the B subunits do not have enzymatic activity and may serve as plasma carrier molecules. Platelet factor XIII is comprised only of 2 A subunits, which are identical to those of plasma origin. Upon cleavage of the activation peptide by thrombin and in the presence of calcium ion, the plasma factor XIII dissociates its B subunits and yields the same active enzyme, factor XIIIa, as platelet factor XIII. This enzyme acts as a transglutaminase to catalyze the formation of gamma-glutamyl-epsilon-lysine crosslinking between fibrin molecules, thus stabilizing the fibrin clot.
Organism species: Homo sapiens (Human)
Organism species: Mus musculus (Mouse)
Organism species: Rattus norvegicus (Rat)
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