Description
Mannan-Binding Lectin Serine Protease 1 (MASP-1) belongs to the peptidase S1 family. MASP1 contains two CUB domains, one EGF-like domain, one peptidase S1 domain and two Sushi (CCP/SCR) domains. MASP1 is primarily expressed in liver.MASP1 involved in the lectin pathway of thecomplement, performs a key role in innate immunity by recognizing pathogens through patterns of sugar moieties and neutralizing them. MASP1 issynthesized as a zymogen and activated when it complexes with the pathogen recognition molecules of lectin pathway, the mannose-binding lectinand the ficolins. MASP1 is not directly involved in complement activation but may act as an amplifier of complement activation by cleavingcomplement C2 or by activating another complement serine protease, MASP2. MASP1 is also able to cleave fibrinogen and factor XIII and maymay be involved in coagulation. MASP1 is inhibited by SERPING1 and A2M