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 2QTJ | pdb_00002qtj

Solution structure of human dimeric immunoglobulin A

External Resource: Annotation


Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

ChainsTypeFamily Name Domain Identifier Family IdentifierProvenance Source (Version)
F [auth O]SCOP2B SuperfamilyImmunoglobulin (Ig) domain-like 8091527 3000071 SCOP2B (2022-06-29)
E [auth N]SCOP2B SuperfamilyImmunoglobulin (Ig) domain-like 8091527 3000071 SCOP2B (2022-06-29)
B [auth M]SCOP2B SuperfamilyImmunoglobulin (Ig) domain-like 8091527 3000071 SCOP2B (2022-06-29)
A [auth L]SCOP2B SuperfamilyImmunoglobulin (Ig) domain-like 8091527 3000071 SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

ChainsFamily NameDomain Identifier ArchitecturePossible HomologyHomologyTopologyFamilyProvenance Source (Version)
H [auth D]Proteasomee2qtjD1 A: alpha arraysX: HTHH: HTHT: tetra-helical, lambda repressor-likeF: ProteasomeECOD (v295.2)
G [auth C]Proteasomee2qtjC1 A: alpha arraysX: HTHH: HTHT: tetra-helical, lambda repressor-likeF: ProteasomeECOD (v295.2)
D [auth B]Proteasomee2qtjB1 A: alpha arraysX: HTHH: HTHT: tetra-helical, lambda repressor-likeF: ProteasomeECOD (v295.2)
C [auth A]Proteasomee2qtjA1 A: alpha arraysX: HTHH: HTHT: tetra-helical, lambda repressor-likeF: ProteasomeECOD (v295.2)
F [auth O]Proteasomee2qtjO1 A: alpha arraysX: HTHH: HTHT: tetra-helical, lambda repressor-likeF: ProteasomeECOD (v295.2)
E [auth N]Proteasomee2qtjN1 A: alpha arraysX: HTHH: HTHT: tetra-helical, lambda repressor-likeF: ProteasomeECOD (v295.2)
B [auth M]Proteasomee2qtjM1 A: alpha arraysX: HTHH: HTHT: tetra-helical, lambda repressor-likeF: ProteasomeECOD (v295.2)
A [auth L]Proteasomee2qtjL1 A: alpha arraysX: HTHH: HTHT: tetra-helical, lambda repressor-likeF: ProteasomeECOD (v295.2)

IMGT Antibody Annotation IMGT Database Homepage

ChainProtein NameDescriptionOrganism NameGene Allele Name(s)Domain Name(s)Receptor TypeReceptor DescriptionProvenance Source
C [auth A],
D [auth B],
G [auth C],
H [auth D]		IgA1 H-ALPHA-1 Homo sapiens (human) IGHV1-3*01, IGHJ4*01, IGHJ4*02, IGHJ4*03, IGHA1*01 V-DOMAIN VH, C-DOMAIN CH1, C-DOMAIN CH2, C-DOMAIN CH3 IG IG-ALPHA-1_KAPPA IMGT (202638-0)
A [auth L],
B [auth M],
E [auth N],
F [auth O]		IgA1 L-KAPPA Homo sapiens (human) IGKV1-13*02, IGKV1D-13*02, IGKJ4*01, IGKJ4*02, IGKC*01 V-DOMAIN V-KAPPA, C-DOMAIN C-KAPPA IG IG-ALPHA-1_KAPPA IMGT (202638-0)

SAbDab Antibody Annotation SAbDab Database Homepage

ChainChain ClassChain SubclassChain TypeAntigen Name(s) Provenance Source
C [auth A],
D [auth B],
G [auth C],
H [auth D]		Heavy ChainIGHV1 --SAbDab (2026-10-02)
A [auth L],
B [auth M],
E [auth N],
F [auth O]		Light ChainIGKV1 Kappa-SAbDab (2026-10-02)

Protein Family Annotation Pfam Database Homepage

ChainsAccessionNameDescriptionCommentsSource
C [auth A],
D [auth B],
G [auth C],
H [auth D]		PF07654Immunoglobulin C1-set domain (C1-set)Immunoglobulin C1-set domainDomain
C [auth A],
D [auth B],
G [auth C],
H [auth D]		PF00047Immunoglobulin domain (ig)Immunoglobulin domainMembers of the immunoglobulin superfamily are found in hundreds of proteins of different functions. Examples include antibodies, the giant muscle kinase titin and receptor tyrosine kinases. Immunoglobulin-like domains may be involved in protein-prote ...Members of the immunoglobulin superfamily are found in hundreds of proteins of different functions. Examples include antibodies, the giant muscle kinase titin and receptor tyrosine kinases. Immunoglobulin-like domains may be involved in protein-protein and protein-ligand interactions.
Domain
A [auth L],
B [auth M],
E [auth N],
F [auth O]		PF07654Immunoglobulin C1-set domain (C1-set)Immunoglobulin C1-set domainDomain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

ChainsPolymerMolecular FunctionBiological ProcessCellular Component
C [auth A],
D [auth B],
G [auth C],
H [auth D]		Ig alpha-1 chain C region
A [auth L],
B [auth M],
E [auth N],
F [auth O]		Kappa light chain IgA1

InterPro: Protein Family Classification InterPro Database Homepage

ChainsAccessionNameType
C [auth A],
D [auth B],
G [auth C],
H [auth D]		IPR036179Immunoglobulin-like domain superfamilyHomologous Superfamily
C [auth A],
D [auth B],
G [auth C],
H [auth D]		IPR003597Immunoglobulin C1-setDomain
C [auth A],
D [auth B],
G [auth C],
H [auth D]		IPR003006Immunoglobulin/major histocompatibility complex, conserved siteConserved Site
C [auth A],
D [auth B],
G [auth C],
H [auth D]		IPR013151Immunoglobulin-like beta-sandwich domainDomain
C [auth A],
D [auth B],
G [auth C],
H [auth D]		IPR050380Immune Recognition and Response ModulatorsFamily
C [auth A],
D [auth B],
G [auth C],
H [auth D]		IPR013783Immunoglobulin-like foldHomologous Superfamily
C [auth A],
D [auth B],
G [auth C],
H [auth D]		IPR007110Immunoglobulin-like domainDomain
A [auth L],
B [auth M],
E [auth N],
F [auth O]		IPR036179Immunoglobulin-like domain superfamilyHomologous Superfamily
A [auth L],
B [auth M],
E [auth N],
F [auth O]		IPR050380Immune Recognition and Response ModulatorsFamily
A [auth L],
B [auth M],
E [auth N],
F [auth O]		IPR003597Immunoglobulin C1-setDomain
A [auth L],
B [auth M],
E [auth N],
F [auth O]		IPR013783Immunoglobulin-like foldHomologous Superfamily
A [auth L],
B [auth M],
E [auth N],
F [auth O]		IPR007110Immunoglobulin-like domainDomain
A [auth L],
B [auth M],
E [auth N],
F [auth O]		IPR003006Immunoglobulin/major histocompatibility complex, conserved siteConserved Site

Pharos: Disease Associations Pharos Homepage Annotation

ChainsDrug Target  Associated Disease
C [auth A],
D [auth B],
G [auth C],
H [auth D]		:  P01876
A [auth L],
B [auth M],
E [auth N],
F [auth O]		:  P01834