Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

ChainsTypeFamily Name Domain Identifier Family IdentifierProvenance Source (Version)
DSCOP2B SuperfamilySushi/CCP/SCR domain 8043502 3000902 SCOP2B (2022-06-29)
DSCOP2B SuperfamilySushi/CCP/SCR domain 8043505 3000902 SCOP2B (2022-06-29)
DSCOP2B SuperfamilyvWA-like 8042312 3000832 SCOP2B (2022-06-29)
DSCOP2B SuperfamilySushi/CCP/SCR domain 8043500 3000902 SCOP2B (2022-06-29)
DSCOP2B SuperfamilyTrypsin-like serine proteases 8042311 3000114 SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

ChainsFamily NameDomain Identifier ArchitecturePossible HomologyHomologyTopologyFamilyProvenance Source (Version)
AA2M_N_1e3hrzA5 A: beta sandwichesX: Immunoglobulin-like beta-sandwichH: Immunoglobulin-relatedT: Immunoglobulin/Fibronectin type III/E set domains/PapD-likeF: A2M_N_1ECOD (1.6)
AKOG1366_2nd_1e3hrzA3 A: beta sandwichesX: Immunoglobulin-like beta-sandwichH: Immunoglobulin-relatedT: Immunoglobulin/Fibronectin type III/E set domains/PapD-likeF: KOG1366_2nd_1ECOD (1.6)
AMG4e3hrzA4 A: beta sandwichesX: Immunoglobulin-like beta-sandwichH: Immunoglobulin-relatedT: Immunoglobulin/Fibronectin type III/E set domains/PapD-likeF: MG4ECOD (1.6)
AKOG1366_1ste3hrzA7 A: beta sandwichesX: Immunoglobulin-like beta-sandwichH: Immunoglobulin-relatedT: Immunoglobulin/Fibronectin type III/E set domains/PapD-likeF: KOG1366_1stECOD (1.6)
AANATOe3hrzA6 A: beta sandwichesX: Immunoglobulin-like beta-sandwichH: Immunoglobulin-relatedT: Immunoglobulin/Fibronectin type III/E set domains/PapD-likeF: ANATOECOD (1.6)
AA2M_N_2e3hrzA1 A: beta sandwichesX: Immunoglobulin-like beta-sandwichH: Immunoglobulin-relatedT: Immunoglobulin/Fibronectin type III/E set domains/PapD-likeF: A2M_N_2ECOD (1.6)
BEUF07660e3hrzB3 A: beta sandwichesX: jelly-rollH: Spermadhesin, CUB domain (From Topology)T: Spermadhesin, CUB domainF: EUF07660ECOD (1.6)
BA2M_Ce3hrzB1 A: beta sandwichesX: Immunoglobulin-like beta-sandwichH: Immunoglobulin-relatedT: Immunoglobulin/Fibronectin type III/E set domains/PapD-likeF: A2M_CECOD (1.6)
BA2M_Ne3hrzB2 A: beta sandwichesX: Immunoglobulin-like beta-sandwichH: Immunoglobulin-relatedT: Immunoglobulin/Fibronectin type III/E set domains/PapD-likeF: A2M_NECOD (1.6)
CNTRe3hrzC4 A: beta barrelsX: OB-foldH: TIMP-like (From Topology)T: TIMP-likeF: NTRECOD (1.6)
CEUF07663e3hrzC3 A: beta sandwichesX: jelly-rollH: Spermadhesin, CUB domain (From Topology)T: Spermadhesin, CUB domainF: EUF07663ECOD (1.6)
CA2M_recepe3hrzC1 A: beta sandwichesX: Immunoglobulin-like beta-sandwichH: Immunoglobulin-relatedT: Common fold of diphtheria toxin/transcription factors/cytochrome fF: A2M_recepECOD (1.6)
DTrypsin_1e3hrzD4 A: beta barrelsX: cradle loop barrelH: RIFT-relatedT: FMN-binding split barrel 2F: Trypsin_1ECOD (1.6)
DVWAe3hrzD5 A: a/b three-layered sandwichesX: HAD domain-likeH: HAD domain-relatedT: vWA-likeF: VWAECOD (1.6)
DSushie3hrzD6 A: few secondary structure elementsX: EGF-likeH: EGF-relatedT: Complement control module/SCR domainF: SushiECOD (1.6)
DSushi_3e3hrzD3 A: few secondary structure elementsX: EGF-likeH: EGF-relatedT: Complement control module/SCR domainF: Sushi_3ECOD (1.6)
DSushi_1e3hrzD7 A: few secondary structure elementsX: EGF-likeH: EGF-relatedT: Complement control module/SCR domainF: Sushi_1ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Protein Family Annotation Pfam Database Homepage

ChainsAccessionNameDescriptionCommentsSource
PF17790Macroglobulin domain MG1 (MG1)Macroglobulin domain MG1This entry represents the N-terminal macroglobulin domain found in complement proteins C3, C4 and C5.Domain
PF17791Macroglobulin domain MG3 (MG3)Macroglobulin domain MG3This entry corresponds to the MG3 domain found in complement components C3, C4 and C5.Domain
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
PF17789Macroglobulin domain MG4 (MG4)Macroglobulin domain MG4This domain is MG4 found in complement C3 and C5 proteins.Domain
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
PF00207Alpha-2-macroglobulin family (A2M)Alpha-2-macroglobulin family- Family
PF21406Complement component 3, CUB domain, first segment (C3_CUB1)Complement component 3, CUB domain, first segmentThis entry represents the first segment of the CUB domain from complement component C3, which is completed but a second segment represented in Pfam:PF21308. The CUB domain is interrupted by the TE domain. The CUB domain forms a massive, tightly packe ...This entry represents the first segment of the CUB domain from complement component C3, which is completed but a second segment represented in Pfam:PF21308. The CUB domain is interrupted by the TE domain. The CUB domain forms a massive, tightly packed super domain with the TE and MG8 domains [1-5]. These entry also includes venom factors, also known as Complement C3 homologues. These are complement-activating proteins with structural and functional similarities to complement component C3b, the activated form of C3 [6].
Domain
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
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
PF21308Complement component 3, CUB domain, second segment (C3_CUB2)Complement component 3, CUB domain, second segmentComplement 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 segment of the CUB domain, which is complete ...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 segment of the CUB domain, which is completed by Pfam:PF21406 [2]. The CUB domain is interrupted by the TE domain. The CUB, TE and MG8 domains form a massive, tightly packed super domain. This entry also includes venom factors, also known as Complement C3 homologues. These are complement-activating proteins with structural and functional similarities to complement component C3b, the activated form of C3 [6].
Domain
PF00092von Willebrand factor type A domain (VWA)von Willebrand factor type A domain- Domain
PF00084Sushi repeat (SCR repeat) (Sushi)Sushi repeat (SCR repeat)- Domain
PF00089Trypsin (Trypsin)Trypsin- Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

ChainsPolymerMolecular FunctionBiological ProcessCellular Component
Cobra venom factor
Cobra venom factor
Cobra venom factor
Complement factor B

InterPro: Protein Family Classification InterPro Database Homepage

ChainsAccessionNameType
IPR019742Alpha-2-macroglobulin, conserved siteConserved Site
IPR009048Alpha-macroglobulin, receptor-bindingDomain
IPR041555Macroglobulin domain MG3Domain
IPR049466Complement component 3, CUB domain, first segmentDomain
IPR001599Alpha-2-macroglobulinDomain
IPR047565Alpha-macroglobulin-like, thiol-ester bond-forming regionConserved Site
IPR048848Complement component 3, CUB domain, second segmentDomain
IPR018081Anaphylatoxin, complement systemHomologous Superfamily
IPR035815Complement C3-like, NTR domainDomain
IPR018933Netrin module, non-TIMP typeDomain
IPR001840Anaphylatoxin, complement system domainDomain
IPR041425Complement C3/4/5, macroglobulin domain MG1Domain
IPR011625Alpha-2-macroglobulin, bait region domainDomain
IPR001134Netrin domainDomain
IPR008993Tissue inhibitor of metalloproteinases-like, OB-foldHomologous Superfamily
IPR011626Alpha-macroglobulin-like, TED domainDomain
IPR000020Anaphylatoxin/fibulinDomain
IPR036595Alpha-macroglobulin, receptor-binding domain superfamilyHomologous Superfamily
IPR002890Macroglobulin domainDomain
IPR013783Immunoglobulin-like foldHomologous Superfamily
IPR050473Alpha-2-macroglobulin/Complement systemFamily
IPR008930Terpenoid cyclases/protein prenyltransferase alpha-alpha toroidHomologous Superfamily
IPR040839Macroglobulin domain MG4Domain
IPR019742Alpha-2-macroglobulin, conserved siteConserved Site
IPR009048Alpha-macroglobulin, receptor-bindingDomain
IPR041555Macroglobulin domain MG3Domain
IPR049466Complement component 3, CUB domain, first segmentDomain
IPR001599Alpha-2-macroglobulinDomain
IPR047565Alpha-macroglobulin-like, thiol-ester bond-forming regionConserved Site
IPR048848Complement component 3, CUB domain, second segmentDomain
IPR018081Anaphylatoxin, complement systemHomologous Superfamily
IPR035815Complement C3-like, NTR domainDomain
IPR018933Netrin module, non-TIMP typeDomain
IPR001840Anaphylatoxin, complement system domainDomain
IPR041425Complement C3/4/5, macroglobulin domain MG1Domain
IPR011625Alpha-2-macroglobulin, bait region domainDomain
IPR001134Netrin domainDomain
IPR008993Tissue inhibitor of metalloproteinases-like, OB-foldHomologous Superfamily
IPR011626Alpha-macroglobulin-like, TED domainDomain
IPR000020Anaphylatoxin/fibulinDomain
IPR036595Alpha-macroglobulin, receptor-binding domain superfamilyHomologous Superfamily
IPR002890Macroglobulin domainDomain
IPR013783Immunoglobulin-like foldHomologous Superfamily
IPR050473Alpha-2-macroglobulin/Complement systemFamily
IPR008930Terpenoid cyclases/protein prenyltransferase alpha-alpha toroidHomologous Superfamily
IPR040839Macroglobulin domain MG4Domain
IPR019742Alpha-2-macroglobulin, conserved siteConserved Site
IPR009048Alpha-macroglobulin, receptor-bindingDomain
IPR041555Macroglobulin domain MG3Domain
IPR049466Complement component 3, CUB domain, first segmentDomain
IPR001599Alpha-2-macroglobulinDomain
IPR047565Alpha-macroglobulin-like, thiol-ester bond-forming regionConserved Site
IPR048848Complement component 3, CUB domain, second segmentDomain
IPR018081Anaphylatoxin, complement systemHomologous Superfamily
IPR035815Complement C3-like, NTR domainDomain
IPR018933Netrin module, non-TIMP typeDomain
IPR001840Anaphylatoxin, complement system domainDomain
IPR041425Complement C3/4/5, macroglobulin domain MG1Domain
IPR011625Alpha-2-macroglobulin, bait region domainDomain
IPR001134Netrin domainDomain
IPR008993Tissue inhibitor of metalloproteinases-like, OB-foldHomologous Superfamily
IPR011626Alpha-macroglobulin-like, TED domainDomain
IPR000020Anaphylatoxin/fibulinDomain
IPR036595Alpha-macroglobulin, receptor-binding domain superfamilyHomologous Superfamily
IPR002890Macroglobulin domainDomain
IPR013783Immunoglobulin-like foldHomologous Superfamily
IPR050473Alpha-2-macroglobulin/Complement systemFamily
IPR008930Terpenoid cyclases/protein prenyltransferase alpha-alpha toroidHomologous Superfamily
IPR040839Macroglobulin domain MG4Domain
IPR011360Complement B/C2Family
IPR028341Complement factor BFamily
IPR009003Peptidase S1, PA clanHomologous Superfamily
IPR036465von Willebrand factor A-like domain superfamilyHomologous Superfamily
IPR001314Peptidase S1A, chymotrypsin familyFamily
IPR033116Serine proteases, trypsin family, serine active siteActive Site
IPR001254Serine proteases, trypsin domainDomain
IPR002035von Willebrand factor, type ADomain
IPR000436Sushi/SCR/CCP domainDomain
IPR018114Serine proteases, trypsin family, histidine active siteActive Site
IPR035976Sushi/SCR/CCP superfamilyHomologous Superfamily