Domain Annotation: ECOD Classification ECOD Database Homepage

ChainsFamily NameDomain Identifier ArchitecturePossible HomologyHomologyTopologyFamilyProvenance Source (Version)
APF00089e2xrcA2 A: beta barrelsX: cradle loop barrelH: RIFT-relatedT: FMN-binding split barrel 2F: PF00089ECOD (1.6)
APF00530e2xrcA1 A: a+b complex topologyX: SRCR-likeH: SRCR-like (From Topology)T: SRCR-likeF: PF00530ECOD (1.6)
APF21287e2xrcA11 A: few secondary structure elementsX: Kazal-type serine protease inhibitors-likeH: Kazal-type serine protease inhibitors (From Topology)T: Kazal-type serine protease inhibitorsF: PF21287ECOD (1.6)
APF21286e2xrcA13 A: few secondary structure elementsX: EGF-likeH: EGF-relatedT: EGF/LamininF: PF21286ECOD (1.6)
APF00057e2xrcA3 A: few secondary structure elementsX: EGF-likeH: LDL receptor-like module (From Topology)T: LDL receptor-like moduleF: PF00057ECOD (1.6)
BPF00089e2xrcB6 A: beta barrelsX: cradle loop barrelH: RIFT-relatedT: FMN-binding split barrelF: PF00089ECOD (1.6)
BPF00530e2xrcB3 A: a+b complex topologyX: SRCR-likeH: SRCR-like (From Topology)T: SRCR-likeF: PF00530ECOD (1.6)
BPF21287e2xrcB2 A: few secondary structure elementsX: Kazal-type serine protease inhibitors-likeH: Kazal-type serine protease inhibitors (From Topology)T: Kazal-type serine protease inhibitorsF: PF21287ECOD (1.6)
BPF21286e2xrcB1 A: few secondary structure elementsX: EGF-likeH: EGF-relatedT: EGF/LamininF: PF21286ECOD (1.6)
BPF00057e2xrcB5 A: few secondary structure elementsX: EGF-likeH: LDL receptor-like module (From Topology)T: LDL receptor-like moduleF: PF00057ECOD (1.6)
CPF00089e2xrcC2 A: beta barrelsX: cradle loop barrelH: RIFT-relatedT: FMN-binding split barrel 2F: PF00089ECOD (1.6)
CPF00530e2xrcC1 A: a+b complex topologyX: SRCR-likeH: SRCR-like (From Topology)T: SRCR-likeF: PF00530ECOD (1.6)
CPF21287e2xrcC17 A: few secondary structure elementsX: Kazal-type serine protease inhibitors-likeH: Kazal-type serine protease inhibitors (From Topology)T: Kazal-type serine protease inhibitorsF: PF21287ECOD (1.6)
CPF21286e2xrcC19 A: few secondary structure elementsX: EGF-likeH: EGF-relatedT: EGF/LamininF: PF21286ECOD (1.6)
CF_UNCLASSIFIEDe2xrcC3 A: few secondary structure elementsX: EGF-likeH: LDL receptor-like module (From Topology)T: LDL receptor-like moduleF: F_UNCLASSIFIEDECOD (1.6)
CPF00057e2xrcC4 A: few secondary structure elementsX: EGF-likeH: LDL receptor-like module (From Topology)T: LDL receptor-like moduleF: PF00057ECOD (1.6)
DPF00089e2xrcD2 A: beta barrelsX: cradle loop barrelH: RIFT-relatedT: FMN-binding split barrel 2F: PF00089ECOD (1.6)
DPF00530e2xrcD1 A: a+b complex topologyX: SRCR-likeH: SRCR-like (From Topology)T: SRCR-likeF: PF00530ECOD (1.6)
DPF21287e2xrcD17 A: few secondary structure elementsX: Kazal-type serine protease inhibitors-likeH: Kazal-type serine protease inhibitors (From Topology)T: Kazal-type serine protease inhibitorsF: PF21287ECOD (1.6)
DPF21286e2xrcD19 A: few secondary structure elementsX: EGF-likeH: EGF-relatedT: EGF/LamininF: PF21286ECOD (1.6)
DF_UNCLASSIFIEDe2xrcD6 A: few secondary structure elementsX: EGF-likeH: LDL receptor-like module (From Topology)T: LDL receptor-like moduleF: F_UNCLASSIFIEDECOD (1.6)
DPF00057e2xrcD3 A: few secondary structure elementsX: EGF-likeH: LDL receptor-like module (From Topology)T: LDL receptor-like moduleF: PF00057ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Protein Family Annotation Pfam Database Homepage

ChainsAccessionNameDescriptionCommentsSource
A, B, C, D
PF21287Complement factor I, KAZAL domain (CFAI_KAZAL)Complement factor I, KAZAL domainComplement 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 (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 (Pfam:PF21286) and a larger C-terminal KAZAL domain. This entry represents the KAZAL domain of CFAI.
Domain
A, B, C, D
PF21286Complement factor I, FIMAC N-terminal domain (CFAI_FIMAC_N)Complement factor I, FIMAC N-terminal domainComplement 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 (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].
Domain
A, B, C, D
PF00089Trypsin (Trypsin)Trypsin- Domain
A, B, C, D
PF00530Scavenger receptor cysteine-rich domain (SRCR)Scavenger receptor cysteine-rich domainThese domains are disulphide rich extracellular domains. These domains are found in several extracellular receptors and may be involved in protein-protein interactions.Domain
A, B, C, D
PF00057Low-density lipoprotein receptor domain class A (Ldl_recept_a)Low-density lipoprotein receptor domain class A- Repeat

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

ChainsPolymerMolecular FunctionBiological ProcessCellular Component
A, B, C, D
HUMAN COMPLEMENT FACTOR I