Annotations: 2JVG

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	SBI C3-binding domain-like	8103625	3002796	SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	Sbi-IV	e2jvgA1	A: alpha bundles	X: Spectrin repeat-like	H: Sbi complement-binding domain (From Topology)	T: Sbi complement-binding domain	F: Sbi-IV	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	1.10.10.1270	Mainly Alpha	Orthogonal Bundle	Arc Repressor Mutant, subunit A	Sbi, C3 binding domain IV	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF11621	C3 binding domain 4 of IgG-bind protein SBI (Sbi-IV)	C3 binding domain 4 of IgG-bind protein SBI	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 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

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	IgG-binding protein SBI	protein-containing complex binding binding immunoglobulin binding IgG binding	-	cell periphery plasma membrane membrane cellular anatomical entity extracellular region

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR021657	Immunoglobulin-binding protein Sbi, domain IV	Domain
A	IPR009063	Immunoglobulin/albumin-binding domain superfamily	Homologous Superfamily
A	IPR041909	Sbi, C3 binding domain IV	Homologous Superfamily
A	IPR003132	Protein A, Ig-binding domain	Domain

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729.