Domain Annotation: ECOD Classification ECOD Database Homepage

ChainsFamily NameDomain Identifier ArchitecturePossible HomologyHomologyTopologyFamilyProvenance Source (Version)
AA2M_N_1e2iceA5 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_1e2iceA3 A: beta sandwichesX: Immunoglobulin-like beta-sandwichH: Immunoglobulin-relatedT: Immunoglobulin/Fibronectin type III/E set domains/PapD-likeF: KOG1366_2nd_1ECOD (1.6)
AMG4e2iceA4 A: beta sandwichesX: Immunoglobulin-like beta-sandwichH: Immunoglobulin-relatedT: Immunoglobulin/Fibronectin type III/E set domains/PapD-likeF: MG4ECOD (1.6)
AKOG1366_1ste2iceA6 A: beta sandwichesX: Immunoglobulin-like beta-sandwichH: Immunoglobulin-relatedT: Immunoglobulin/Fibronectin type III/E set domains/PapD-likeF: KOG1366_1stECOD (1.6)
AANATOe2iceA7 A: beta sandwichesX: Immunoglobulin-like beta-sandwichH: Immunoglobulin-relatedT: Immunoglobulin/Fibronectin type III/E set domains/PapD-likeF: ANATOECOD (1.6)
AA2M_N_2e2iceA1 A: beta sandwichesX: Immunoglobulin-like beta-sandwichH: Immunoglobulin-relatedT: Immunoglobulin/Fibronectin type III/E set domains/PapD-likeF: A2M_N_2ECOD (1.6)
E [auth D]A2M_N_1e2iceD2 A: beta sandwichesX: Immunoglobulin-like beta-sandwichH: Immunoglobulin-relatedT: Immunoglobulin/Fibronectin type III/E set domains/PapD-likeF: A2M_N_1ECOD (1.6)
E [auth D]KOG1366_2nd_1e2iceD5 A: beta sandwichesX: Immunoglobulin-like beta-sandwichH: Immunoglobulin-relatedT: Immunoglobulin/Fibronectin type III/E set domains/PapD-likeF: KOG1366_2nd_1ECOD (1.6)
E [auth D]MG4e2iceD4 A: beta sandwichesX: Immunoglobulin-like beta-sandwichH: Immunoglobulin-relatedT: Immunoglobulin/Fibronectin type III/E set domains/PapD-likeF: MG4ECOD (1.6)
E [auth D]KOG1366_1ste2iceD6 A: beta sandwichesX: Immunoglobulin-like beta-sandwichH: Immunoglobulin-relatedT: Immunoglobulin/Fibronectin type III/E set domains/PapD-likeF: KOG1366_1stECOD (1.6)
E [auth D]ANATOe2iceD1 A: beta sandwichesX: Immunoglobulin-like beta-sandwichH: Immunoglobulin-relatedT: Immunoglobulin/Fibronectin type III/E set domains/PapD-likeF: ANATOECOD (1.6)
E [auth D]A2M_N_2e2iceD3 A: beta sandwichesX: Immunoglobulin-like beta-sandwichH: Immunoglobulin-relatedT: Immunoglobulin/Fibronectin type III/E set domains/PapD-likeF: A2M_N_2ECOD (1.6)
BA2M_Ce2iceB3 A: beta sandwichesX: Immunoglobulin-like beta-sandwichH: Immunoglobulin-relatedT: Immunoglobulin/Fibronectin type III/E set domains/PapD-likeF: A2M_CECOD (1.6)
BA2M_Ne2iceB2 A: beta sandwichesX: Immunoglobulin-like beta-sandwichH: Immunoglobulin-relatedT: Immunoglobulin/Fibronectin type III/E set domains/PapD-likeF: A2M_NECOD (1.6)
F [auth E]A2M_Ce2iceE3 A: beta sandwichesX: Immunoglobulin-like beta-sandwichH: Immunoglobulin-relatedT: Immunoglobulin/Fibronectin type III/E set domains/PapD-likeF: A2M_CECOD (1.6)
F [auth E]A2M_Ne2iceE2 A: beta sandwichesX: Immunoglobulin-like beta-sandwichH: Immunoglobulin-relatedT: Immunoglobulin/Fibronectin type III/E set domains/PapD-likeF: A2M_NECOD (1.6)
CNTRe2iceC1 A: beta barrelsX: OB-foldH: TIMP-like (From Topology)T: TIMP-likeF: NTRECOD (1.6)
CA2M_recepe2iceC2 A: beta sandwichesX: Immunoglobulin-like beta-sandwichH: Immunoglobulin-relatedT: Common fold of diphtheria toxin/transcription factors/cytochrome fF: A2M_recepECOD (1.6)
G [auth F]NTRe2iceF1 A: beta barrelsX: OB-foldH: TIMP-like (From Topology)T: TIMP-likeF: NTRECOD (1.6)
G [auth F]A2M_recepe2iceF2 A: beta sandwichesX: Immunoglobulin-like beta-sandwichH: Immunoglobulin-relatedT: Common fold of diphtheria toxin/transcription factors/cytochrome fF: A2M_recepECOD (1.6)
D [auth S]V-set_9e2iceS1 A: beta sandwichesX: Immunoglobulin-like beta-sandwichH: Immunoglobulin-relatedT: Immunoglobulin/Fibronectin type III/E set domains/PapD-likeF: V-set_9ECOD (1.6)
H [auth T]V-set_9e2iceT1 A: beta sandwichesX: Immunoglobulin-like beta-sandwichH: Immunoglobulin-relatedT: Immunoglobulin/Fibronectin type III/E set domains/PapD-likeF: V-set_9ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

ChainDomainClassArchitectureTopologyHomologyProvenance Source (Version)
A2.60.40.1930 Mainly Beta Sandwich Immunoglobulin-like Macroglobulin (MG2) domainCATH (4.3.0)
A2.60.40.1940 Mainly Beta Sandwich Immunoglobulin-like CATH (4.3.0)
A2.60.40.10 Mainly Beta Sandwich Immunoglobulin-like ImmunoglobulinsCATH (4.3.0)
A6.20.50.160 Special Other non-globular N-terminal domain of TfIIb CATH (4.3.0)
E [auth D]2.60.40.1930 Mainly Beta Sandwich Immunoglobulin-like Macroglobulin (MG2) domainCATH (4.3.0)
E [auth D]2.60.40.1940 Mainly Beta Sandwich Immunoglobulin-like CATH (4.3.0)
E [auth D]2.60.40.10 Mainly Beta Sandwich Immunoglobulin-like ImmunoglobulinsCATH (4.3.0)
E [auth D]6.20.50.160 Special Other non-globular N-terminal domain of TfIIb CATH (4.3.0)
B2.20.130.20 Mainly Beta Single Sheet S-adenosyl-L-methionine-dependent methyltransferases CATH (4.3.0)
B2.60.40.10 Mainly Beta Sandwich Immunoglobulin-like ImmunoglobulinsCATH (4.3.0)
F [auth E]2.20.130.20 Mainly Beta Single Sheet S-adenosyl-L-methionine-dependent methyltransferases CATH (4.3.0)
F [auth E]2.60.40.10 Mainly Beta Sandwich Immunoglobulin-like ImmunoglobulinsCATH (4.3.0)
C2.60.40.690 Mainly Beta Sandwich Immunoglobulin-like Alpha-macroglobulin, receptor-binding domainCATH (4.3.0)
C2.40.50.120 Mainly Beta Beta Barrel OB fold (Dihydrolipoamide Acetyltransferase, E2P) CATH (4.3.0)
G [auth F]2.60.40.690 Mainly Beta Sandwich Immunoglobulin-like Alpha-macroglobulin, receptor-binding domainCATH (4.3.0)
G [auth F]2.40.50.120 Mainly Beta Beta Barrel OB fold (Dihydrolipoamide Acetyltransferase, E2P) CATH (4.3.0)
D [auth S]2.60.40.10 Mainly Beta Sandwich Immunoglobulin-like ImmunoglobulinsCATH (4.3.0)
H [auth T]2.60.40.10 Mainly Beta Sandwich Immunoglobulin-like ImmunoglobulinsCATH (4.3.0)

IMGT Antibody Annotation IMGT Database Homepage

ChainProtein NameDescriptionOrganism NameGene Allele Name(s)Domain Name(s)Receptor TypeReceptor DescriptionProvenance Source
D [auth S],
H [auth T]
VSIG4 1V-LIKE Homo sapiens (human) VSIG4*01 V-LIKE-DOMAIN V-LIKE RPI 1V-LIKE_1V-LIKE IMGT (202449-0)

Protein Family Annotation Pfam Database Homepage

ChainsAccessionNameDescriptionCommentsSource
A,
E [auth D]
PF17790Macroglobulin domain MG1 (MG1)Macroglobulin domain MG1This entry represents the N-terminal macroglobulin domain found in complement proteins C3, C4 and C5.Domain
A,
E [auth D]
PF17791Macroglobulin domain MG3 (MG3)Macroglobulin domain MG3This entry corresponds to the MG3 domain found in complement components C3, C4 and C5.Domain
A,
E [auth D]
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,
E [auth D]
PF17789Macroglobulin domain MG4 (MG4)Macroglobulin domain MG4This domain is MG4 found in complement C3 and C5 proteins.Domain
A,
E [auth D]
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,
F [auth E]
PF00207Alpha-2-macroglobulin family (A2M)Alpha-2-macroglobulin family- Family
C,
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
C,
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
D [auth S],
H [auth T]
PF07686Immunoglobulin V-set domain (V-set)Immunoglobulin V-set domainThis domain is found in antibodies as well as neural protein P0 and CTL4 amongst others.Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

ChainsPolymerMolecular FunctionBiological ProcessCellular Component
A,
E [auth D]
Complement C3 beta chain
B,
F [auth E]
Complement C3 alpha chain
C,
G [auth F]
Complement C3 alpha chain
D [auth S],
H [auth T]
V-set and immunoglobulin domain-containing protein 4

InterPro: Protein Family Classification InterPro Database Homepage

ChainsAccessionNameType
A,
E [auth D]
IPR019742Alpha-2-macroglobulin, conserved siteConserved Site
A,
E [auth D]
IPR009048Alpha-macroglobulin, receptor-bindingDomain
A,
E [auth D]
IPR049466Complement component 3, CUB domain, first segmentDomain
A,
E [auth D]
IPR001599Alpha-2-macroglobulinDomain
A,
E [auth D]
IPR001134Netrin domainDomain
A,
E [auth D]
IPR011626Alpha-macroglobulin-like, TED domainDomain
A,
E [auth D]
IPR002890Macroglobulin domainDomain
A,
E [auth D]
IPR013783Immunoglobulin-like foldHomologous Superfamily
A,
E [auth D]
IPR008930Terpenoid cyclases/protein prenyltransferase alpha-alpha toroidHomologous Superfamily
A,
E [auth D]
IPR041555Macroglobulin domain MG3Domain
A,
E [auth D]
IPR047565Alpha-macroglobulin-like, thiol-ester bond-forming regionConserved Site
A,
E [auth D]
IPR048848Complement component 3, CUB domain, second segmentDomain
A,
E [auth D]
IPR018081Anaphylatoxin, complement systemHomologous Superfamily
A,
E [auth D]
IPR035815Complement C3-like, NTR domainDomain
A,
E [auth D]
IPR018933Netrin module, non-TIMP typeDomain
A,
E [auth D]
IPR001840Anaphylatoxin, complement system domainDomain
A,
E [auth D]
IPR041425Complement C3/4/5, macroglobulin domain MG1Domain
A,
E [auth D]
IPR011625Alpha-2-macroglobulin, bait region domainDomain
A,
E [auth D]
IPR008993Tissue inhibitor of metalloproteinases-like, OB-foldHomologous Superfamily
A,
E [auth D]
IPR000020Anaphylatoxin/fibulinDomain
A,
E [auth D]
IPR036595Alpha-macroglobulin, receptor-binding domain superfamilyHomologous Superfamily
A,
E [auth D]
IPR050473Alpha-2-macroglobulin/Complement systemFamily
A,
E [auth D]
IPR040839Macroglobulin domain MG4Domain
B,
F [auth E]
IPR019742Alpha-2-macroglobulin, conserved siteConserved Site
B,
F [auth E]
IPR009048Alpha-macroglobulin, receptor-bindingDomain
B,
F [auth E]
IPR049466Complement component 3, CUB domain, first segmentDomain
B,
F [auth E]
IPR001599Alpha-2-macroglobulinDomain
B,
F [auth E]
IPR001134Netrin domainDomain
B,
F [auth E]
IPR011626Alpha-macroglobulin-like, TED domainDomain
B,
F [auth E]
IPR002890Macroglobulin domainDomain
B,
F [auth E]
IPR013783Immunoglobulin-like foldHomologous Superfamily
B,
F [auth E]
IPR008930Terpenoid cyclases/protein prenyltransferase alpha-alpha toroidHomologous Superfamily
B,
F [auth E]
IPR041555Macroglobulin domain MG3Domain
B,
F [auth E]
IPR047565Alpha-macroglobulin-like, thiol-ester bond-forming regionConserved Site
B,
F [auth E]
IPR048848Complement component 3, CUB domain, second segmentDomain
B,
F [auth E]
IPR018081Anaphylatoxin, complement systemHomologous Superfamily
B,
F [auth E]
IPR035815Complement C3-like, NTR domainDomain
B,
F [auth E]
IPR018933Netrin module, non-TIMP typeDomain
B,
F [auth E]
IPR001840Anaphylatoxin, complement system domainDomain
B,
F [auth E]
IPR041425Complement C3/4/5, macroglobulin domain MG1Domain
B,
F [auth E]
IPR011625Alpha-2-macroglobulin, bait region domainDomain
B,
F [auth E]
IPR008993Tissue inhibitor of metalloproteinases-like, OB-foldHomologous Superfamily
B,
F [auth E]
IPR000020Anaphylatoxin/fibulinDomain
B,
F [auth E]
IPR036595Alpha-macroglobulin, receptor-binding domain superfamilyHomologous Superfamily
B,
F [auth E]
IPR050473Alpha-2-macroglobulin/Complement systemFamily
B,
F [auth E]
IPR040839Macroglobulin domain MG4Domain
C,
G [auth F]
IPR019742Alpha-2-macroglobulin, conserved siteConserved Site
C,
G [auth F]
IPR009048Alpha-macroglobulin, receptor-bindingDomain
C,
G [auth F]
IPR049466Complement component 3, CUB domain, first segmentDomain
C,
G [auth F]
IPR001599Alpha-2-macroglobulinDomain
C,
G [auth F]
IPR001134Netrin domainDomain
C,
G [auth F]
IPR011626Alpha-macroglobulin-like, TED domainDomain
C,
G [auth F]
IPR002890Macroglobulin domainDomain
C,
G [auth F]
IPR013783Immunoglobulin-like foldHomologous Superfamily
C,
G [auth F]
IPR008930Terpenoid cyclases/protein prenyltransferase alpha-alpha toroidHomologous Superfamily
C,
G [auth F]
IPR041555Macroglobulin domain MG3Domain
C,
G [auth F]
IPR047565Alpha-macroglobulin-like, thiol-ester bond-forming regionConserved Site
C,
G [auth F]
IPR048848Complement component 3, CUB domain, second segmentDomain
C,
G [auth F]
IPR018081Anaphylatoxin, complement systemHomologous Superfamily
C,
G [auth F]
IPR035815Complement C3-like, NTR domainDomain
C,
G [auth F]
IPR018933Netrin module, non-TIMP typeDomain
C,
G [auth F]
IPR001840Anaphylatoxin, complement system domainDomain
C,
G [auth F]
IPR041425Complement C3/4/5, macroglobulin domain MG1Domain
C,
G [auth F]
IPR011625Alpha-2-macroglobulin, bait region domainDomain
C,
G [auth F]
IPR008993Tissue inhibitor of metalloproteinases-like, OB-foldHomologous Superfamily
C,
G [auth F]
IPR000020Anaphylatoxin/fibulinDomain
C,
G [auth F]
IPR036595Alpha-macroglobulin, receptor-binding domain superfamilyHomologous Superfamily
C,
G [auth F]
IPR050473Alpha-2-macroglobulin/Complement systemFamily
C,
G [auth F]
IPR040839Macroglobulin domain MG4Domain
D [auth S],
H [auth T]
IPR036179Immunoglobulin-like domain superfamilyHomologous Superfamily
D [auth S],
H [auth T]
IPR003598Immunoglobulin subtype 2Domain
D [auth S],
H [auth T]
IPR039944VSIG4, immunoglobulin variable (IgV)-like domainDomain
D [auth S],
H [auth T]
IPR013783Immunoglobulin-like foldHomologous Superfamily
D [auth S],
H [auth T]
IPR013106Immunoglobulin V-set domainDomain
D [auth S],
H [auth T]
IPR003599Immunoglobulin domain subtypeDomain
D [auth S],
H [auth T]
IPR039939V-set and immunoglobulin domain-containing protein 4Family
D [auth S],
H [auth T]
IPR007110Immunoglobulin-like domainDomain

Pharos: Disease Associations Pharos Homepage Annotation

ChainsDrug Target  Associated Disease
A,
E [auth D]
PharosP01024
B,
F [auth E]
PharosP01024
C,
G [auth F]
PharosP01024
D [auth S],
H [auth T]
PharosQ9Y279