Annotations: 7KPJ

Crystal structure of Ruminococcus gnavus immunoglobulin binding protein in complex with 338E6 Fab

External Resource: Annotation

Domain Annotation: ECOD Classification
Domain Annotation: CATH
SAbDab Antibody Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
E [auth C]	Sybindin	e7kpjC1	A: alpha arrays	X: putative RnfG subunit of electron transport complex	H: putative RnfG subunit of electron transport complex	T: Aspartate/ornithine carbamoyltransferase	F: Sybindin	ECOD (v295.2)
D [auth A]	Hemagglutinin	e7kpjA1	A: alpha arrays	X: putative RnfG subunit of electron transport complex	H: putative RnfG subunit of electron transport complex	T: Aspartate/ornithine carbamoyltransferase	F: Hemagglutinin	ECOD (v295.2)
F [auth D]	Sybindin	e7kpjD1	A: alpha arrays	X: putative RnfG subunit of electron transport complex	H: putative RnfG subunit of electron transport complex	T: Aspartate/ornithine carbamoyltransferase	F: Sybindin	ECOD (v295.2)
A [auth B]	Hemagglutinin	e7kpjB1	A: alpha arrays	X: putative RnfG subunit of electron transport complex	H: putative RnfG subunit of electron transport complex	T: Aspartate/ornithine carbamoyltransferase	F: Hemagglutinin	ECOD (v295.2)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
E [auth C]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (utative)
D [auth A]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (utative)
F [auth D]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (utative)
A [auth B]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (utative)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
D [auth A], E [auth C]	Heavy Chain	IGHV5	-	gram_pos_anchoring domain-containing protein	SAbDab (2026-08-21)
A [auth B], F [auth D]	Light Chain	IGKV6	Kappa	gram_pos_anchoring domain-containing protein	SAbDab (2026-08-21)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
D [auth A], E [auth C]	338E6 Fab heavy chain	-	-	cellular anatomical structure extracellular region
B [auth E], C [auth F]	GRAM_POS_ANCHORING domain-containing protein	-	-	-
A [auth B], F [auth D]	338E6 Fab light chain kappa	-	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
D [auth A], E [auth C]	IPR050199	Immunoglobulin Heavy Variable	Family
D [auth A], E [auth C]	IPR013783	Immunoglobulin-like fold	Homologous Superfamily
D [auth A], E [auth C]	IPR036179	Immunoglobulin-like domain superfamily	Homologous Superfamily
D [auth A], E [auth C]	IPR013106	Immunoglobulin V-set domain	Domain
D [auth A], E [auth C]	IPR003599	Immunoglobulin domain subtype	Domain
D [auth A], E [auth C]	IPR007110	Immunoglobulin-like domain	Domain
B [auth E], C [auth F]	IPR019931	LPXTG cell wall anchor motif	Conserved Site
A [auth B], F [auth D]	IPR050150	Immunoglobulin Variable Light Chain	Family
A [auth B], F [auth D]	IPR013783	Immunoglobulin-like fold	Homologous Superfamily
A [auth B], F [auth D]	IPR036179	Immunoglobulin-like domain superfamily	Homologous Superfamily
A [auth B], F [auth D]	IPR013106	Immunoglobulin V-set domain	Domain
A [auth B], F [auth D]	IPR003599	Immunoglobulin domain subtype	Domain
A [auth B], F [auth D]	IPR007110	Immunoglobulin-like domain	Domain

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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. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.