6RMU

Crystal structure of disulphide-linked human C3d dimer in complex with Staphylococcus aureus complement subversion protein Sbi-IV

External Resource: Annotation


Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

ChainsDomain InfoClassFoldSuperfamilyFamilyDomainSpeciesProvenance Source (Version)
Ad6rmua_ All alpha proteins alpha/alpha toroid Terpenoid cyclases/Protein prenyltransferases Complement components Thio-ester containing domain (TED) from Complement C3, aka C3d or C3dg Human (Homo sapiens ) [TaxId: 9606 ], SCOPe (2.08)
C [auth B]d6rmub_ All alpha proteins alpha/alpha toroid Terpenoid cyclases/Protein prenyltransferases Complement components Thio-ester containing domain (TED) from Complement C3, aka C3d or C3dg Human (Homo sapiens ) [TaxId: 9606 ], SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

ChainsTypeFamily Name Domain Identifier Family IdentifierProvenance Source (Version)
ASCOP2B SuperfamilyTerpenoid cyclases/Protein prenyltransferases8038414 3001024 SCOP2B (2022-06-29)
C [auth B]SCOP2B SuperfamilyTerpenoid cyclases/Protein prenyltransferases8038414 3001024 SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

ChainsFamily NameDomain Identifier ArchitecturePossible HomologyHomologyTopologyFamilyProvenance Source (Version)
B [auth C]PF11621e6rmuC1 A: alpha bundlesX: Spectrin repeat-likeH: Sbi complement-binding domain (From Topology)T: Sbi complement-binding domainF: PF11621ECOD (1.6)
DPF11621e6rmuD1 A: alpha bundlesX: Spectrin repeat-likeH: Sbi complement-binding domain (From Topology)T: Sbi complement-binding domainF: PF11621ECOD (1.6)
APF07678e6rmuA1 A: alpha superhelicesX: Repetitive alpha hairpinsH: alpha/alpha toroid (From Topology)T: alpha/alpha toroidF: PF07678ECOD (1.6)
C [auth B]PF07678e6rmuB1 A: alpha superhelicesX: Repetitive alpha hairpinsH: alpha/alpha toroid (From Topology)T: alpha/alpha toroidF: PF07678ECOD (1.6)

Protein Family Annotation Pfam Database Homepage

ChainsAccessionNameDescriptionCommentsSource
B [auth C],
D		PF11621C3 binding domain 4 of IgG-bind protein SBI (Sbi-IV)C3 binding domain 4 of IgG-bind protein SBIThis family of proteins represents Sbi domain IV which binds the central complement protein C3. Sbi-IV interacts with Sbi-III to induce a consumption of complement via alternative pathway activation [1]. When not interacting with Sbi-III, Sbi-IV inhi ...This family of proteins represents Sbi domain IV which binds the central complement protein C3. Sbi-IV interacts with Sbi-III to induce a consumption of complement via alternative pathway activation [1]. When not interacting with Sbi-III, Sbi-IV inhibits the alternative pathway without complement consumption. The structure of Sbi-IV consists of a three-helix bundle fold [1].
Domain
A,
C [auth B]		PF07678A-macroglobulin TED domain (TED_complement)A-macroglobulin TED domain- Repeat
A,
C [auth B]		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

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

ChainsPolymerMolecular FunctionBiological ProcessCellular Component
B [auth C],
D		Immunoglobulin-binding protein Sbi -
A,
C [auth B]		Complement C3

InterPro: Protein Family Classification InterPro Database Homepage

ChainsAccessionNameType
B [auth C],
D		IPR021657Immunoglobulin-binding protein Sbi, domain IVDomain
B [auth C],
D		IPR009063Immunoglobulin/albumin-binding domain superfamilyHomologous Superfamily
B [auth C],
D		IPR041909Sbi, C3 binding domain IVHomologous Superfamily
B [auth C],
D		IPR003132Protein A, Ig-binding domainDomain
A,
C [auth B]		IPR019742Alpha-2-macroglobulin, conserved siteConserved Site
A,
C [auth B]		IPR009048Alpha-macroglobulin, receptor-bindingDomain
A,
C [auth B]		IPR049466Complement component 3, CUB domain, first segmentDomain
A,
C [auth B]		IPR001599Alpha-2-macroglobulinDomain
A,
C [auth B]		IPR001134Netrin domainDomain
A,
C [auth B]		IPR011626Alpha-macroglobulin-like, TED domainDomain
A,
C [auth B]		IPR002890Macroglobulin domainDomain
A,
C [auth B]		IPR013783Immunoglobulin-like foldHomologous Superfamily
A,
C [auth B]		IPR008930Terpenoid cyclases/protein prenyltransferase alpha-alpha toroidHomologous Superfamily
A,
C [auth B]		IPR041555Macroglobulin domain MG3Domain
A,
C [auth B]		IPR047565Alpha-macroglobulin-like, thiol-ester bond-forming regionConserved Site
A,
C [auth B]		IPR048848Complement component 3, CUB domain, second segmentDomain
A,
C [auth B]		IPR018081Anaphylatoxin, complement systemHomologous Superfamily
A,
C [auth B]		IPR035815Complement C3-like, NTR domainDomain
A,
C [auth B]		IPR018933Netrin module, non-TIMP typeDomain
A,
C [auth B]		IPR001840Anaphylatoxin, complement system domainDomain
A,
C [auth B]		IPR041425Complement C3/4/5, macroglobulin domain MG1Domain
A,
C [auth B]		IPR011625Alpha-2-macroglobulin, bait region domainDomain
A,
C [auth B]		IPR008993Tissue inhibitor of metalloproteinases-like, OB-foldHomologous Superfamily
A,
C [auth B]		IPR000020Anaphylatoxin/fibulinDomain
A,
C [auth B]		IPR036595Alpha-macroglobulin, receptor-binding domain superfamilyHomologous Superfamily
A,
C [auth B]		IPR040839Macroglobulin domain MG4Domain

Pharos: Disease Associations Pharos Homepage Annotation

ChainsDrug Target  Associated Disease
A,
C [auth B]		Pharos:  P01024