Annotations: 6OC7

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
C	d6oc7c1	Alpha and beta proteins (a+b)	beta-Grasp (ubiquitin-like)	Immunoglobulin-binding domains	Immunoglobulin-binding domains	Immunoglobulin-binding protein G, different constituent domains	(Streptococcus sp. 'group G ) [TaxId: 1320 ],	SCOPe (2.08)
C	d6oc7c2	Artifacts	Tags	Tags	Tags	C-terminal Tags	(Streptococcus sp. 'group G ) [TaxId: 1320 ],	SCOPe (2.08)
B [auth L]	d6oc7l2	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	C1 set domains (antibody constant domain-like)	automated matches	(Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
B [auth L]	d6oc7l1	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	automated matches	automated matches	(Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
C		e6oc7C1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: C1-set	F:	ECOD (20:10:01)
B [auth L]		e6oc7L1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: C1-set	F:	ECOD (20:10:01)
A [auth H]		e6oc7H1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: C1-set	F:	ECOD (20:10:01)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
C	3.10.20.10	Alpha Beta	Roll	Ubiquitin-like (UB roll)		CATH (utative)
A [auth H]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (utative)

IMGT Antibody Annotation IMGT Database Homepage

Chain	Protein Name	Description	Organism Name	Gene Allele Name(s)	Domain Name(s)	Receptor Type	Receptor Description	Provenance Source
B [auth L]	Fab HMP42, anti-HIV, broadly neutralizing	L-LAMBDA	Homo sapiens (human)	IGLV3-2502, IGLJ201, IGLJ301, IGLC201, IGLC202, IGLC304	V-DOMAIN V-LAMBDA, C-DOMAIN C-LAMBDA	IG	FAB-GAMMA-1_LAMBDA	IMGT (202609-0)
A [auth H]	Fab HMP42, anti-HIV, broadly neutralizing	VH-CH1	Homo sapiens (human)	IGHV1-202, IGHJ604, IGHG101, IGHG102, IGHG104, IGHG105, IGHG112, IGHG114, IGHG113, IGHG109, IGHG110, IGHG107, IGHG1*11	V-DOMAIN VH, C-DOMAIN CH1	IG	FAB-GAMMA-1_LAMBDA	IMGT (202609-0)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
B [auth L]	Light Chain	IGLV3	Lambda	-	SAbDab (2026-03-13)
A [auth H]	Heavy Chain	IGHV1	-	-	SAbDab (2026-03-13)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
C	Immunoglobulin G-binding protein G	protein-containing complex binding binding immunoglobulin binding IgG binding	-	-
B [auth L]	Light chain for HMP42 Fab	-	-	-
A [auth H]	Heavy chain of HMP42 Fab	-	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
C	IPR009063	Immunoglobulin/albumin-binding domain superfamily	Homologous Superfamily
C	IPR005877	YSIRK Gram-positive signal peptide	Domain
C	IPR000724	IgG-binding B	Domain
C	IPR019950	M protein-type anchor motif	Conserved Site
C	IPR035152	GA-like domain	Domain
C	IPR019931	LPXTG cell wall anchor motif	Conserved Site

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.