Coagulation cascade enzyme

The **coagulation cascade enzymes** are a group of proteolytic enzymes, primarily serine proteases, responsible for mediating the sequential activation of blood clotting factors resulting in the conversion of fibrinogen to fibrin and the formation of a stable clot[2][4][1]. These enzymes include (but are not limited to) thrombin, factor Xa, factor IXa, and factor XIIa, and function in a tightly regulated sequence involving the intrinsic, extrinsic, and common pathways[2][4][6]. Additional regulatory proteins (such as protein C, protein S, and antithrombin) modulate the cascade to prevent excessive clotting[1][4]. Aberrations in the function or regulation of these enzymes lead to diseases such as hemophilia (due to deficiency in specific factors), thrombophilia, and thromboembolic disorders[4][6]. Many widely used anticoagulant drugs inhibit one or more coagulation cascade enzymes to prevent or treat clotting disorders (e.g., warfarin, heparin, direct factor Xa inhibitors)[5].\n---\n**Notes:**\n- This entry describes a group (class) of molecular targets, not a single specific enzyme or protein. For structured databases, individual enzymes (e.g., Thrombin, Factor Xa, Factor IXa) should each have distinct entries per best practices.\n- "Coagulation cascade enzymes" is not a canonical name for a specific target but represents a mechanistic group. Therefore, `is_incorrect` is true for this as a precise molecular target. The field is often subdivided into individual coagulation factors for therapeutic interventions (e.g., "Thrombin (FIIa)", "Factor Xa"), each with their own abbreviation and drug interactions[5].\n- The coagulation cascade encompasses both **enzymatic proteases** (mostly serine proteases) and some non-enzymatic cofactors.

Other names

Coagulation factorBlood coagulation enzymeClotting factor enzymeSerine protease (for most factors)Clotting enzyme

Inhibition of specific coagulation factors (e.g., Factor Xa inhibition, Thrombin inhibition), Vitamin K antagonism (reducing factor synthesis), Replacement of deficient factor, Enhancement of endogenous inhibitors (protein C, protein S), Fibrinolysis stimulation