Complement factor I (CFAI) is a trypsin-like serine protease that plays an essential role in regulating the immune response by controlling all complement pathways. It cleaves three peptide bonds in the alpha-chain of C3b and two in the alpha-chain of ...
Complement factor I (CFAI) is a trypsin-like serine protease that plays an essential role in regulating the immune response by controlling all complement pathways. It cleaves three peptide bonds in the alpha-chain of C3b and two in the alpha-chain of C4b which inactivate these proteins. It consists of an N-terminal FI and membrane attack domain (FIMAC or Factor I-like modules FIM), a scavenger receptor cysteine-rich (SRCR) domain (Pfam:PF00530), LDLRA1 and LDLRA2 (Pfam:PF00057) and a C-terminal catalytic serine protease domain (Pfam:PF00089) [1,2]. FIMs are also present in complement proteins C6 and C7, and participate in protein-protein interactions that critical to the progress of a complement-mediated immune response. In CFAI, the FIMAC domain is important for the ability of FI to degrade C4b and C3b [1-2]. It consists of a small N-terminal FOLN subdomain (Pfam:PF21286) and a larger C-terminal KAZAL domain. This entry represents the KAZAL domain of CFAI FIMAC domain.
Complement factor I (CFAI) is a trypsin-like serine protease that plays an essential role in regulating the immune response by controlling all complement pathways. It cleaves three peptide bonds in the alpha-chain of C3b and two in the alpha-chain of ...
Complement factor I (CFAI) is a trypsin-like serine protease that plays an essential role in regulating the immune response by controlling all complement pathways. It cleaves three peptide bonds in the alpha-chain of C3b and two in the alpha-chain of C4b which inactivate these proteins. It consists of an N-terminal FI and membrane attack domain (FIMAC or Factor I-like modules FIM), a scavenger receptor cysteine-rich (SRCR) domain (Pfam:PF00530), LDLRA1 and LDLRA2 (Pfam:PF00057) and a C-terminal catalytic serine protease domain (Pfam:PF00089) [1,2]. FIMs are also present in complement proteins C6 and C7, and participate in protein-protein interactions that critical to the progress of a complement-mediated immune response. In CFAI, the FIMAC domain is important for the ability of FI to degrade C4b and C3b [1-2]. It consists of a a small N-terminal FOLN subdomain and a larger C-terminal KAZAL domain. This entry represents the N-terminal region of FIMAC, whose structure is a truncated form of the epidermal growth factor (EGF) domain [3].
These domains are disulphide rich extracellular domains. These domains are found in several extracellular receptors and may be involved in protein-protein interactions.
