Serine Proteases of Coagulation, Fibrinolysis, and Complement Pathways (C1r, C1s, Factor XIIa, Kallikrein, Factor XIa, Plasmin)

This group comprises several crucial serine proteases, namely C1r, C1s, Factor XIIa, kallikrein, Factor XIa, and plasmin, which are central to regulating critical physiological processes including blood coagulation, fibrinolysis (clot breakdown), and the innate immune system's complement and contact activation pathways. While individually distinct and typically addressed separately in structured biomedical data, they are collectively involved in maintaining vascular homeostasis, modulating inflammation, and orchestrating immune responses. Their dysregulation can lead to a spectrum of pathologies, ranging from thrombotic and bleeding disorders to autoimmune conditions and hereditary angioedema. They represent significant therapeutic targets, with pharmacological interventions aimed at either inhibiting or enhancing their specific proteolytic activities.

Other names

Contact System ProteasesComplement Pathway ProteasesFibrinolytic ProteasesCoagulation Proteases

Targeting these proteases involves either inhibition of their proteolytic activity (e.g., anticoagulants, anti-inflammatory, anti-complement) or enhancement of their activity (e.g., thrombolytics). Inhibition aims to block downstream cascades like coagulation, bradykinin generation, or complement activation, while enhancement promotes processes like fibrinolysis.