Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

ChainsTypeFamily Name Domain Identifier Family IdentifierProvenance Source (Version)
BSCOP2B SuperfamilyTerpenoid cyclases/Protein prenyltransferases8038414 3001024 SCOP2B (2022-06-29)
G [auth F]SCOP2B SuperfamilyTerpenoid cyclases/Protein prenyltransferases8038414 3001024 SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

ChainsFamily NameDomain Identifier ArchitecturePossible HomologyHomologyTopologyFamilyProvenance Source (Version)
APF01835e5o32A1 A: beta sandwichesX: Immunoglobulin-like beta-sandwichH: Immunoglobulin-relatedT: Immunoglobulin/Fibronectin type III/E set domains/PapD-likeF: PF01835ECOD (1.6)
APF07703e5o32A6 A: beta sandwichesX: Immunoglobulin-like beta-sandwichH: Immunoglobulin-relatedT: Immunoglobulin/Fibronectin type III/E set domains/PapD-likeF: PF07703ECOD (1.6)
APF17789e5o32A3 A: beta sandwichesX: Immunoglobulin-like beta-sandwichH: Immunoglobulin-relatedT: Immunoglobulin/Fibronectin type III/E set domains/PapD-likeF: PF17789ECOD (1.6)
APF17790e5o32A2 A: beta sandwichesX: Immunoglobulin-like beta-sandwichH: Immunoglobulin-relatedT: Immunoglobulin/Fibronectin type III/E set domains/PapD-likeF: PF17790ECOD (1.6)
APF17791e5o32A4 A: beta sandwichesX: Immunoglobulin-like beta-sandwichH: Immunoglobulin-relatedT: Immunoglobulin/Fibronectin type III/E set domains/PapD-likeF: PF17791ECOD (1.6)
F [auth E]PF01835e5o32E2 A: beta sandwichesX: Immunoglobulin-like beta-sandwichH: Immunoglobulin-relatedT: Immunoglobulin/Fibronectin type III/E set domains/PapD-likeF: PF01835ECOD (1.6)
F [auth E]PF07703e5o32E6 A: beta sandwichesX: Immunoglobulin-like beta-sandwichH: Immunoglobulin-relatedT: Immunoglobulin/Fibronectin type III/E set domains/PapD-likeF: PF07703ECOD (1.6)
F [auth E]PF17789e5o32E4 A: beta sandwichesX: Immunoglobulin-like beta-sandwichH: Immunoglobulin-relatedT: Immunoglobulin/Fibronectin type III/E set domains/PapD-likeF: PF17789ECOD (1.6)
F [auth E]PF17790e5o32E1 A: beta sandwichesX: Immunoglobulin-like beta-sandwichH: Immunoglobulin-relatedT: Immunoglobulin/Fibronectin type III/E set domains/PapD-likeF: PF17790ECOD (1.6)
F [auth E]PF17791e5o32E5 A: beta sandwichesX: Immunoglobulin-like beta-sandwichH: Immunoglobulin-relatedT: Immunoglobulin/Fibronectin type III/E set domains/PapD-likeF: PF17791ECOD (1.6)
BPF01759e5o32B1 A: beta barrelsX: OB-foldH: TIMP-like (From Topology)T: TIMP-likeF: PF01759ECOD (1.6)
BPF21308,PF21406e5o32B6 A: beta sandwichesX: jelly-rollH: Spermadhesin, CUB domain (From Topology)T: Spermadhesin, CUB domainF: PF21308,PF21406ECOD (1.6)
BPF00207e5o32B3 A: beta sandwichesX: Immunoglobulin-like beta-sandwichH: Immunoglobulin-relatedT: Immunoglobulin/Fibronectin type III/E set domains/PapD-likeF: PF00207ECOD (1.6)
BPF07677e5o32B4 A: beta sandwichesX: Immunoglobulin-like beta-sandwichH: Immunoglobulin-relatedT: Common fold of diphtheria toxin/transcription factors/cytochrome fF: PF07677ECOD (1.6)
BPF07678e5o32B2 A: alpha superhelicesX: Repetitive alpha hairpinsH: alpha/alpha toroid (From Topology)T: alpha/alpha toroidF: PF07678ECOD (1.6)
G [auth F]PF01759e5o32F4 A: beta barrelsX: OB-foldH: TIMP-like (From Topology)T: TIMP-likeF: PF01759ECOD (1.6)
G [auth F]PF21308,PF21406e5o32F2 A: beta sandwichesX: jelly-rollH: Spermadhesin, CUB domain (From Topology)T: Spermadhesin, CUB domainF: PF21308,PF21406ECOD (1.6)
G [auth F]PF00207e5o32F6 A: beta sandwichesX: Immunoglobulin-like beta-sandwichH: Immunoglobulin-relatedT: Immunoglobulin/Fibronectin type III/E set domains/PapD-likeF: PF00207ECOD (1.6)
G [auth F]PF07677e5o32F3 A: beta sandwichesX: Immunoglobulin-like beta-sandwichH: Immunoglobulin-relatedT: Common fold of diphtheria toxin/transcription factors/cytochrome fF: PF07677ECOD (1.6)
G [auth F]PF07678e5o32F1 A: alpha superhelicesX: Repetitive alpha hairpinsH: alpha/alpha toroid (From Topology)T: alpha/alpha toroidF: PF07678ECOD (1.6)
CPF00084e5o32C6 A: few secondary structure elementsX: EGF-likeH: EGF-relatedT: Complement control module/SCR domainF: PF00084ECOD (1.6)
H [auth G]PF00084e5o32G6 A: few secondary structure elementsX: EGF-likeH: EGF-relatedT: Complement control module/SCR domainF: PF00084ECOD (1.6)
DPF00530e5o32D1 A: a+b complex topologyX: SRCR-likeH: SRCR-like (From Topology)T: SRCR-likeF: PF00530ECOD (1.6)
DPF21287e5o32D2 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)
DPF21286e5o32D3 A: few secondary structure elementsX: EGF-likeH: EGF-relatedT: EGF/LamininF: PF21286ECOD (1.6)
DPF00057e5o32D4 A: few secondary structure elementsX: EGF-likeH: LDL receptor-like module (From Topology)T: LDL receptor-like moduleF: PF00057ECOD (1.6)
I [auth H]PF00530e5o32H2 A: a+b complex topologyX: SRCR-likeH: SRCR-like (From Topology)T: SRCR-likeF: PF00530ECOD (1.6)
I [auth H]PF21287e5o32H1 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)
I [auth H]PF21286e5o32H3 A: few secondary structure elementsX: EGF-likeH: EGF-relatedT: EGF/LamininF: PF21286ECOD (1.6)
I [auth H]PF00057e5o32H5 A: few secondary structure elementsX: EGF-likeH: LDL receptor-like module (From Topology)T: LDL receptor-like moduleF: PF00057ECOD (1.6)
E [auth I]PF00089e5o32I1 A: beta barrelsX: cradle loop barrelH: RIFT-relatedT: FMN-binding split barrel 2F: PF00089ECOD (1.6)
JPF00089e5o32J1 A: beta barrelsX: cradle loop barrelH: RIFT-relatedT: FMN-binding split barrel 2F: PF00089ECOD (1.6)

Protein Family Annotation Pfam Database Homepage

ChainsAccessionNameDescriptionCommentsSource
A,
F [auth E]
PF17790Macroglobulin domain MG1 (MG1)Macroglobulin domain MG1This entry represents the N-terminal macroglobulin domain found in complement proteins C3, C4 and C5.Domain
A,
F [auth E]
PF17791Macroglobulin domain MG3 (MG3)Macroglobulin domain MG3This entry corresponds to the MG3 domain found in complement components C3, C4 and C5.Domain
A,
F [auth E]
PF01835MG2 domain (MG2)MG2 domainThis is the MG2 (macroglobulin) domain of alpha-2-macroglobulin in eukaryotes [1]. Alpha-2-macroglobulins (A2Ms) are plasma proteins that trap and inhibit a broad range of proteases and are major components of the eukaryotic innate immune system. How ...This is the MG2 (macroglobulin) domain of alpha-2-macroglobulin in eukaryotes [1]. Alpha-2-macroglobulins (A2Ms) are plasma proteins that trap and inhibit a broad range of proteases and are major components of the eukaryotic innate immune system. However, A2M-like proteins were identified in pathogenically invasive bacteria and species that colonize higher eukaryotes. This domain is found in eukaryotic and bacterial proteins. In human A2Ms, this domain is termed macroglobulin-like (MG) domain 2 and in Salmonella enterica ser A2Ms, this is domain 4 [2] [3].
Domain
A,
F [auth E]
PF17789Macroglobulin domain MG4 (MG4)Macroglobulin domain MG4This domain is MG4 found in complement C3 and C5 proteins.Domain
A,
F [auth E]
PF07703Alpha-2-macroglobulin bait region domain (A2M_BRD)Alpha-2-macroglobulin bait region domainAlpha-2-macroglobulins (A2Ms) are plasma proteins that trap and inhibit a broad range of proteases and are major components of the eukaryotic innate immune system. However, A2M-like proteins were identified in pathogenically invasive bacteria and spe ...Alpha-2-macroglobulins (A2Ms) are plasma proteins that trap and inhibit a broad range of proteases and are major components of the eukaryotic innate immune system. However, A2M-like proteins were identified in pathogenically invasive bacteria and species that colonize higher eukaryotes. This domain is found in eukaryotic and bacterial proteins. In human A2Ms, this domain encompasses macroglobulin-like domain MG5 and 6 including bait region. In Salmonella enterica ser A2Ms, this domain encompasses MG7 and MG8 including the bait region [1] [2]. The Bait region is cleaved by proteases, followed by a large conformational change that blocks the target protease within a cage-like complex. This model of protease entrapment is recognised as the Venus flytrap mechanism [1].
Domain
B,
G [auth F]
PF00207Alpha-2-macroglobulin family (A2M)Alpha-2-macroglobulin family- Family
B,
G [auth F]
PF01759UNC-6/NTR/C345C module (NTR)UNC-6/NTR/C345C moduleSequence similarity between netrin UNC-6 and C345C complement protein family members, and hence the existence of the UNC-6 module, was first reported in [1]. Subsequently, many additional members of the family were identified on the basis of sequence ...Sequence similarity between netrin UNC-6 and C345C complement protein family members, and hence the existence of the UNC-6 module, was first reported in [1]. Subsequently, many additional members of the family were identified on the basis of sequence similarity between the C-terminal domains of netrins, complement proteins C3, C4, C5, secreted frizzled-related proteins, and type I pro-collagen C-proteinase enhancer proteins (PCOLCEs), which are homologous with the N-terminal domains of tissue inhibitors of metalloproteinases (TIMPs). The TIMPs are classified as a separate family in Pfam (Pfam:PF00965) [2]. This expanded domain family has been named as the NTR module [2].
Domain
B,
G [auth F]
PF21406Complement component 3, CUB domain 1 (C3_CUB1)Complement component 3, CUB domain 1This entry represents the first CUB domain from complement component C3, which together with the second CUB (Pfam:PF21308) flanks the TE domain. The CUB domain forms a massive, tightly packed super domain with the TE and MG8 domains [1-5].Domain
B,
G [auth F]
PF07678A-macroglobulin TED domain (TED_complement)A-macroglobulin TED domain- Repeat
B,
G [auth F]
PF07677A-macroglobulin receptor binding domain (A2M_recep)A-macroglobulin receptor binding domainThis family includes the receptor binding domain region of the alpha-2-macroglobulin family.Domain
B,
G [auth F]
PF21308Complement component 3, CUB domain 2 (C3_CUB2)Complement component 3, CUB domain 2Complement C3 is major component in the both the classical and alternative complement activation pathways. C3 is cleaved into two chains (alpha and beta) by C3 convertases. This entry represents the second CUB domain [2]. This domain and the first CU ...Complement C3 is major component in the both the classical and alternative complement activation pathways. C3 is cleaved into two chains (alpha and beta) by C3 convertases. This entry represents the second CUB domain [2]. This domain and the first CUB (Pfam:PF21406) flank the TE domain. The CUB, TE and MG8 domains form a massive, tightly packed super domain.
Domain
C,
H [auth G]
PF00084Sushi repeat (SCR repeat) (Sushi)Sushi repeat (SCR repeat)- Domain
D,
I [auth H]
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
D,
I [auth H]
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
D,
I [auth H]
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
D,
I [auth H]
PF00057Low-density lipoprotein receptor domain class A (Ldl_recept_a)Low-density lipoprotein receptor domain class A- Repeat
E [auth I],
J
PF00089Trypsin (Trypsin)Trypsin- Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

ChainsPolymerMolecular FunctionBiological ProcessCellular Component
A,
F [auth E]
Complement C3
B,
G [auth F]
Complement C3
C,
H [auth G]
Complement factor H,Complement factor H
D,
I [auth H]
Complement factor I
E [auth I],
J
Complement factor I

InterPro: Protein Family Classification InterPro Database Homepage

ChainsAccessionNameType
A,
F [auth E]
IPR019742Alpha-2-macroglobulin, conserved siteConserved Site
A,
F [auth E]
IPR009048Alpha-macroglobulin, receptor-bindingDomain
A,
F [auth E]
IPR049466Complement component 3, CUB domain, first segmentDomain
A,
F [auth E]
IPR001599Alpha-2-macroglobulinDomain
A,
F [auth E]
IPR001134Netrin domainDomain
A,
F [auth E]
IPR011626Alpha-macroglobulin-like, TED domainDomain
A,
F [auth E]
IPR002890Macroglobulin domainDomain
A,
F [auth E]
IPR013783Immunoglobulin-like foldHomologous Superfamily
A,
F [auth E]
IPR008930Terpenoid cyclases/protein prenyltransferase alpha-alpha toroidHomologous Superfamily
A,
F [auth E]
IPR041555Macroglobulin domain MG3Domain
A,
F [auth E]
IPR047565Alpha-macroglobulin-like, thiol-ester bond-forming regionConserved Site
A,
F [auth E]
IPR048848Complement component 3, CUB domain, second segmentDomain
A,
F [auth E]
IPR018081Anaphylatoxin, complement systemHomologous Superfamily
A,
F [auth E]
IPR035815Complement C3-like, NTR domainDomain
A,
F [auth E]
IPR018933Netrin module, non-TIMP typeDomain
A,
F [auth E]
IPR001840Anaphylatoxin, complement system domainDomain
A,
F [auth E]
IPR041425Complement C3/4/5, macroglobulin domain MG1Domain
A,
F [auth E]
IPR011625Alpha-2-macroglobulin, bait region domainDomain
A,
F [auth E]
IPR008993Tissue inhibitor of metalloproteinases-like, OB-foldHomologous Superfamily
A,
F [auth E]
IPR000020Anaphylatoxin/fibulinDomain
A,
F [auth E]
IPR036595Alpha-macroglobulin, receptor-binding domain superfamilyHomologous Superfamily
A,
F [auth E]
IPR040839Macroglobulin domain MG4Domain
B,
G [auth F]
IPR019742Alpha-2-macroglobulin, conserved siteConserved Site
B,
G [auth F]
IPR009048Alpha-macroglobulin, receptor-bindingDomain
B,
G [auth F]
IPR049466Complement component 3, CUB domain, first segmentDomain
B,
G [auth F]
IPR001599Alpha-2-macroglobulinDomain
B,
G [auth F]
IPR001134Netrin domainDomain
B,
G [auth F]
IPR011626Alpha-macroglobulin-like, TED domainDomain
B,
G [auth F]
IPR002890Macroglobulin domainDomain
B,
G [auth F]
IPR013783Immunoglobulin-like foldHomologous Superfamily
B,
G [auth F]
IPR008930Terpenoid cyclases/protein prenyltransferase alpha-alpha toroidHomologous Superfamily
B,
G [auth F]
IPR041555Macroglobulin domain MG3Domain
B,
G [auth F]
IPR047565Alpha-macroglobulin-like, thiol-ester bond-forming regionConserved Site
B,
G [auth F]
IPR048848Complement component 3, CUB domain, second segmentDomain
B,
G [auth F]
IPR018081Anaphylatoxin, complement systemHomologous Superfamily
B,
G [auth F]
IPR035815Complement C3-like, NTR domainDomain
B,
G [auth F]
IPR018933Netrin module, non-TIMP typeDomain
B,
G [auth F]
IPR001840Anaphylatoxin, complement system domainDomain
B,
G [auth F]
IPR041425Complement C3/4/5, macroglobulin domain MG1Domain
B,
G [auth F]
IPR011625Alpha-2-macroglobulin, bait region domainDomain
B,
G [auth F]
IPR008993Tissue inhibitor of metalloproteinases-like, OB-foldHomologous Superfamily
B,
G [auth F]
IPR000020Anaphylatoxin/fibulinDomain
B,
G [auth F]
IPR036595Alpha-macroglobulin, receptor-binding domain superfamilyHomologous Superfamily
B,
G [auth F]
IPR040839Macroglobulin domain MG4Domain
C,
H [auth G]
IPR000436Sushi/SCR/CCP domainDomain
C,
H [auth G]
IPR035976Sushi/SCR/CCP superfamilyHomologous Superfamily
D,
I [auth H]
IPR002172Low-density lipoprotein (LDL) receptor class A repeatRepeat
D,
I [auth H]
IPR036058Kazal domain superfamilyHomologous Superfamily
D,
I [auth H]
IPR048722Complement factor I, FIMAC N-terminal domainDomain
D,
I [auth H]
IPR036055LDL receptor-like superfamilyHomologous Superfamily
D,
I [auth H]
IPR002350Kazal domainDomain
D,
I [auth H]
IPR018114Serine proteases, trypsin family, histidine active siteActive Site
D,
I [auth H]
IPR003884Factor I / membrane attack complexDomain
D,
I [auth H]
IPR017448SRCR-like domainDomain
D,
I [auth H]
IPR048719Complement factor I, KAZAL domainDomain
D,
I [auth H]
IPR009003Peptidase S1, PA clanHomologous Superfamily
D,
I [auth H]
IPR001190SRCR domainDomain
D,
I [auth H]
IPR001314Peptidase S1A, chymotrypsin familyFamily
D,
I [auth H]
IPR033116Serine proteases, trypsin family, serine active siteActive Site
D,
I [auth H]
IPR036772SRCR-like domain superfamilyHomologous Superfamily
D,
I [auth H]
IPR001254Serine proteases, trypsin domainDomain
D,
I [auth H]
IPR023415Low-density lipoprotein (LDL) receptor class A, conserved siteConserved Site
D,
I [auth H]
IPR043504Peptidase S1, PA clan, chymotrypsin-like foldHomologous Superfamily
E [auth I],
J
IPR002172Low-density lipoprotein (LDL) receptor class A repeatRepeat
E [auth I],
J
IPR036058Kazal domain superfamilyHomologous Superfamily
E [auth I],
J
IPR048722Complement factor I, FIMAC N-terminal domainDomain
E [auth I],
J
IPR036055LDL receptor-like superfamilyHomologous Superfamily
E [auth I],
J
IPR002350Kazal domainDomain
E [auth I],
J
IPR018114Serine proteases, trypsin family, histidine active siteActive Site
E [auth I],
J
IPR003884Factor I / membrane attack complexDomain
E [auth I],
J
IPR017448SRCR-like domainDomain
E [auth I],
J
IPR048719Complement factor I, KAZAL domainDomain
E [auth I],
J
IPR009003Peptidase S1, PA clanHomologous Superfamily
E [auth I],
J
IPR001190SRCR domainDomain
E [auth I],
J
IPR001314Peptidase S1A, chymotrypsin familyFamily
E [auth I],
J
IPR033116Serine proteases, trypsin family, serine active siteActive Site
E [auth I],
J
IPR036772SRCR-like domain superfamilyHomologous Superfamily
E [auth I],
J
IPR001254Serine proteases, trypsin domainDomain
E [auth I],
J
IPR023415Low-density lipoprotein (LDL) receptor class A, conserved siteConserved Site
E [auth I],
J
IPR043504Peptidase S1, PA clan, chymotrypsin-like foldHomologous Superfamily

Pharos: Disease Associations Pharos Homepage Annotation

ChainsDrug Target  Associated Disease
A,
F [auth E]
PharosP01024
B,
G [auth F]
PharosP01024
C,
H [auth G]
PharosP08603
D,
I [auth H]
PharosP05156
E [auth I],
J
PharosP05156