Annotations: 6ULC

Structure of full-length, fully glycosylated, non-modified HIV-1 gp160 bound to PG16 Fab at a nominal resolution of 4.6 Angstrom

External Resource: Annotation

Domain Annotation: ECOD Classification
IMGT Antibody Annotation
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)
H [auth L]	Metallophos,Metallophos_C	e6ulcL1	A: alpha arrays	X: putative RnfG subunit of electron transport complex	H: putative RnfG subunit of electron transport complex	T: Aspartate/ornithine carbamoyltransferase	F: Metallophos,Metallophos_C	ECOD (v295.2)
G [auth H]	Metallophos,Metallophos_C	e6ulcH1	A: alpha arrays	X: putative RnfG subunit of electron transport complex	H: putative RnfG subunit of electron transport complex	T: Aspartate/ornithine carbamoyltransferase	F: Metallophos,Metallophos_C	ECOD (v295.2)
F	C1-set	e6ulcF1	A: alpha arrays	X: putative RnfG subunit of electron transport complex	H: putative RnfG subunit of electron transport complex	T: Aspartate/ornithine carbamoyltransferase	F: C1-set	ECOD (v295.2)
D	C1-set	e6ulcD1	A: alpha arrays	X: putative RnfG subunit of electron transport complex	H: putative RnfG subunit of electron transport complex	T: Aspartate/ornithine carbamoyltransferase	F: C1-set	ECOD (v295.2)
B	Metallophos,Metallophos_C	e6ulcB1	A: alpha arrays	X: putative RnfG subunit of electron transport complex	H: putative RnfG subunit of electron transport complex	T: Aspartate/ornithine carbamoyltransferase	F: Metallophos,Metallophos_C	ECOD (v295.2)
E	C1-set	e6ulcE1	A: alpha arrays	X: putative RnfG subunit of electron transport complex	H: putative RnfG subunit of electron transport complex	T: Aspartate/ornithine carbamoyltransferase	F: C1-set	ECOD (v295.2)
C	C1-set	e6ulcC1	A: alpha arrays	X: putative RnfG subunit of electron transport complex	H: putative RnfG subunit of electron transport complex	T: Aspartate/ornithine carbamoyltransferase	F: C1-set	ECOD (v295.2)
A	Metallophos,Metallophos_C	e6ulcA1	A: alpha arrays	X: putative RnfG subunit of electron transport complex	H: putative RnfG subunit of electron transport complex	T: Aspartate/ornithine carbamoyltransferase	F: Metallophos,Metallophos_C	ECOD (v295.2)

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
H [auth L]	Fab PG16	L-LAMBDA	Homo sapiens (human)	IGLV2-1403, IGLJ101, IGLJ201, IGLJ302, IGLJ601, IGLJ301, IGLC3*03	V-DOMAIN V-LAMBDA, C-DOMAIN C-LAMBDA	IG	FAB-GAMMA-1_LAMBDA	IMGT (202637-0)
G [auth H]	Fab PG16	VH-CH1	Homo sapiens (human)	IGHV3-3003, IGHV3-3006, IGHV3-3012, IGHV3-3019, IGHV3-3305, IGHJ604, IGHG103, IGHG108, IGHG1*06	V-DOMAIN VH, C-DOMAIN CH1	IG	FAB-GAMMA-1_LAMBDA	IMGT (202637-0)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
H [auth L]	Light Chain	IGLV2	Lambda	envelope glycoprotein gp120,envelope glycoprotein gp120 \| envelope glycoprotein gp120,envelope glycoprotein gp120	SAbDab (2026-09-25)
G [auth H]	Heavy Chain	IGHV3	-	envelope glycoprotein gp120,envelope glycoprotein gp120 \| envelope glycoprotein gp120,envelope glycoprotein gp120	SAbDab (2026-09-25)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
H [auth L]	antibody PG16 Fab light chain	-	-	-
G [auth H]	antibody PG16 Fab heavy chain	-	-	-
B, D, F	Envelope glycoprotein gp41	structural molecule activity	viral process fusion of virus membrane with host endosome membrane membrane fusion involved in viral entry into host cell virion attachment to host cell biological process involved in interspecies interaction between organisms adhesion of symbiont to host cell viral life cycle adhesion of symbiont to host biological process involved in interaction with host biological process involved in symbiotic interaction import into cell receptor-mediated endocytosis of virus by host cell transport establishment of localization viral process fusion of virus membrane with host endosome membrane membrane fusion involved in viral entry into host cell virion attachment to host cell biological process involved in interspecies interaction between organisms adhesion of symbiont to host cell viral life cycle adhesion of symbiont to host biological process involved in interaction with host biological process involved in symbiotic interaction import into cell receptor-mediated endocytosis of virus by host cell transport establishment of localization vesicle-mediated transport localization symbiont entry into host cell clathrin-dependent endocytosis symbiont entry into host cellular process clathrin-dependent endocytosis of virus by host cell receptor-mediated endocytosis endocytosis endocytosis involved in viral entry into host cell symbiont-mediated perturbation of host defense response symbiont-mediated perturbation of host process modulation of process of another organism	virion component virion membrane host intracellular membrane-bounded organelle host cellular component host intracellular part host cell membrane other organism part host cell cytoplasm part host intracellular organelle cellular anatomical structure host cell endosome membrane host cell cytoplasm host cell part host cell endosome virion component virion membrane host intracellular membrane-bounded organelle host cellular component host intracellular part host cell membrane other organism part host cell cytoplasm part host intracellular organelle cellular anatomical structure host cell endosome membrane host cell cytoplasm host cell part host cell endosome host intracellular region viral membrane viral envelope host cell plasma membrane
A, C, E	envelope glycoprotein gp120,envelope glycoprotein gp120	structural molecule activity	viral process fusion of virus membrane with host endosome membrane membrane fusion involved in viral entry into host cell virion attachment to host cell biological process involved in interspecies interaction between organisms adhesion of symbiont to host cell viral life cycle adhesion of symbiont to host biological process involved in interaction with host biological process involved in symbiotic interaction import into cell receptor-mediated endocytosis of virus by host cell transport establishment of localization viral process fusion of virus membrane with host endosome membrane membrane fusion involved in viral entry into host cell virion attachment to host cell biological process involved in interspecies interaction between organisms adhesion of symbiont to host cell viral life cycle adhesion of symbiont to host biological process involved in interaction with host biological process involved in symbiotic interaction import into cell receptor-mediated endocytosis of virus by host cell transport establishment of localization vesicle-mediated transport localization symbiont entry into host cell clathrin-dependent endocytosis symbiont entry into host cellular process clathrin-dependent endocytosis of virus by host cell receptor-mediated endocytosis endocytosis endocytosis involved in viral entry into host cell symbiont-mediated perturbation of host defense response symbiont-mediated perturbation of host process modulation of process of another organism	virion component virion membrane host intracellular membrane-bounded organelle host cellular component host intracellular part host cell membrane other organism part host cell cytoplasm part host intracellular organelle cellular anatomical structure host cell endosome membrane host cell cytoplasm host cell part host cell endosome virion component virion membrane host intracellular membrane-bounded organelle host cellular component host intracellular part host cell membrane other organism part host cell cytoplasm part host intracellular organelle cellular anatomical structure host cell endosome membrane host cell cytoplasm host cell part host cell endosome host intracellular region viral membrane viral envelope host cell plasma membrane

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
B, D, F	IPR000777	Human immunodeficiency virus 1, envelope glycoprotein Gp120	Domain
B, D, F	IPR036377	Gp120 core superfamily	Homologous Superfamily
B, D, F	IPR000328	Retroviral envelope protein GP41-like	Domain
B, D, F	IPR037527	Envelope glycoprotein Gp160	Family
A, C, E	IPR000777	Human immunodeficiency virus 1, envelope glycoprotein Gp120	Domain
A, C, E	IPR036377	Gp120 core superfamily	Homologous Superfamily
A, C, E	IPR000328	Retroviral envelope protein GP41-like	Domain
A, C, E	IPR037527	Envelope glycoprotein Gp160	Family