Domain Annotation: ECOD Classification ECOD Database Homepage

ChainsFamily NameDomain Identifier ArchitecturePossible HomologyHomologyTopologyFamilyProvenance Source (Version)
A [auth H]PF02216e6k3mH1 A: alpha bundlesX: immunoglobulin/albumin-binding domain-likeH: Bacterial immunoglobulin/albumin-binding domains (From Topology)T: Bacterial immunoglobulin/albumin-binding domainsF: PF02216ECOD (1.6)
B [auth A]PF07686e6k3mA1 A: beta sandwichesX: Immunoglobulin-like beta-sandwichH: Immunoglobulin-relatedT: Immunoglobulin/Fibronectin type III/E set domains/PapD-likeF: PF07686ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

ChainDomainClassArchitectureTopologyHomologyProvenance Source (Version)
A [auth H]1.20.5.420 Mainly Alpha Up-down Bundle Single alpha-helices involved in coiled-coils or other helix-helix interfaces Immunoglobulin FC, subunit CCATH (utative)

IMGT Antibody Annotation IMGT Database Homepage

ChainProtein NameDescriptionOrganism NameGene Allele Name(s)Domain Name(s)Receptor TypeReceptor DescriptionProvenance Source
A [auth H]SpA, IgG-binding domain proteinA SPA Staphylococcus aureus SpA*01 R-LIKE-DOMAIN SPA-DOMAIN RPI SPA IMGT (202416-0)
B [auth A]3LRH V-LAMBDA Homo sapiens (human) IGLV1-36*01, TRAJ57*01 V-DOMAIN V-LAMBDA IG V-LAMBDA IMGT (202416-0)

SAbDab Antibody Annotation SAbDab Database Homepage

ChainChain ClassChain SubclassChain TypeAntigen Name(s) Provenance Source
B [auth A]Light ChainIGLV1 Lambdaspa igg-binding domain protein,protein aSAbDab (2024-04-26)

Protein Family Annotation Pfam Database Homepage

ChainsAccessionNameDescriptionCommentsSource
A [auth H]PF02216B domain (B)B domainThis family contains the B domain of Staphylococcal protein A, which specifically binds to the Fc portion of immunoglobulin G.Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

ChainsPolymerMolecular FunctionBiological ProcessCellular Component
A [auth H]SpA IgG-binding domain protein,Protein A -
B [auth A]3LRH intrabody---