Annotations: 6U59

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	gp120 core	8097270	3001390	SCOP2B (2022-06-29)
E [auth C]	SCOP2B Superfamily	gp120 core	8097270	3001390	SCOP2B (2022-06-29)
I [auth G]	SCOP2B Superfamily	gp120 core	8097270	3001390	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Virus ectodomain	8085612	3001628	SCOP2B (2022-06-29)
F [auth D]	SCOP2B Superfamily	Virus ectodomain	8085612	3001628	SCOP2B (2022-06-29)
J [auth I]	SCOP2B Superfamily	Virus ectodomain	8085612	3001628	SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	GP120_2nd	e6u59A3	A: beta barrels	X: V1/V2 domain in HIV gp120 (From Topology)	H: V1/V2 domain in HIV gp120 (From Topology)	T: V1/V2 domain in HIV gp120	F: GP120_2nd	ECOD (1.6)
A	GP120_3rd	e6u59A1	A: a+b two layers	X: Ribosomal protein L31e-like	H: Ribosomal protein L31e/gp120 outer domain (From Topology)	T: Ribosomal protein L31e/gp120 outer domain	F: GP120_3rd	ECOD (1.6)
A	GP120_1st	e6u59A2	A: a+b two layers	X: gp120 inner domain (From Topology)	H: gp120 inner domain (From Topology)	T: gp120 inner domain	F: GP120_1st	ECOD (1.6)
E [auth C]	GP120_2nd	e6u59C2	A: beta barrels	X: V1/V2 domain in HIV gp120 (From Topology)	H: V1/V2 domain in HIV gp120 (From Topology)	T: V1/V2 domain in HIV gp120	F: GP120_2nd	ECOD (1.6)
E [auth C]	GP120_3rd	e6u59C1	A: a+b two layers	X: Ribosomal protein L31e-like	H: Ribosomal protein L31e/gp120 outer domain (From Topology)	T: Ribosomal protein L31e/gp120 outer domain	F: GP120_3rd	ECOD (1.6)
E [auth C]	GP120_1st	e6u59C3	A: a+b two layers	X: gp120 inner domain (From Topology)	H: gp120 inner domain (From Topology)	T: gp120 inner domain	F: GP120_1st	ECOD (1.6)
I [auth G]	GP120_2nd	e6u59G1	A: beta barrels	X: V1/V2 domain in HIV gp120 (From Topology)	H: V1/V2 domain in HIV gp120 (From Topology)	T: V1/V2 domain in HIV gp120	F: GP120_2nd	ECOD (1.6)
I [auth G]	GP120_3rd	e6u59G3	A: a+b two layers	X: Ribosomal protein L31e-like	H: Ribosomal protein L31e/gp120 outer domain (From Topology)	T: Ribosomal protein L31e/gp120 outer domain	F: GP120_3rd	ECOD (1.6)
I [auth G]	GP120_1st	e6u59G2	A: a+b two layers	X: gp120 inner domain (From Topology)	H: gp120 inner domain (From Topology)	T: gp120 inner domain	F: GP120_1st	ECOD (1.6)
B	GP41_1st	e6u59B1	A: a+b duplicates or obligate multimers	X: MPER trimer (From Topology)	H: MPER trimer (From Topology)	T: MPER trimer	F: GP41_1st	ECOD (1.6)
F [auth D]	GP41_1st	e6u59D1	A: a+b duplicates or obligate multimers	X: MPER trimer (From Topology)	H: MPER trimer (From Topology)	T: MPER trimer	F: GP41_1st	ECOD (1.6)
J [auth I]	GP41_1st	e6u59I1	A: a+b duplicates or obligate multimers	X: MPER trimer (From Topology)	H: MPER trimer (From Topology)	T: MPER trimer	F: GP41_1st	ECOD (1.6)
C [auth L]	V-set	e6u59L1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: V-set	ECOD (1.6)
G [auth E]	V-set	e6u59E1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: V-set	ECOD (1.6)
K [auth J]	V-set	e6u59J1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: V-set	ECOD (1.6)
D [auth H]	V-set_12	e6u59H1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: V-set_12	ECOD (1.6)
H [auth F]	V-set_12	e6u59F1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: V-set_12	ECOD (1.6)
L [auth K]	V-set_12	e6u59K1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: V-set_12	ECOD (1.6)

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
C [auth L], G [auth E], K [auth J]	Fv 13B	V-KAPPA	Homo sapiens (human)	IGKV1S202, IGKJ1-202, IGKJ1-2*01	V-DOMAIN V-KAPPA	IG	FV-HEAVY_KAPPA	IMGT (202524-0)
D [auth H], H [auth F], L [auth K]	Fv 13B	VH	Homo sapiens (human)	IGHV1S4501, IGHJ401	V-DOMAIN VH	IG	FV-HEAVY_KAPPA	IMGT (202524-0)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
C [auth L], G [auth E], K [auth J]	Light Chain	IGKV1	Kappa	sosip.664 gp120,sosip.664 gp120	SAbDab (2025-06-27)
D [auth H], H [auth F], L [auth K]	Heavy Chain	IGHV1	-	sosip.664 gp120,sosip.664 gp120	SAbDab (2025-06-27)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, E [auth C], I [auth G]	PF00516	Envelope glycoprotein GP120 (GP120)	Envelope glycoprotein GP120	The envelope glycoprotein Gp160 of HIV1 is cleaved into the surface protein Gp120 and the transmembrane protein Gp41. The entry of HIV requires interaction of viral GP120 with the CD4 glycoprotein (Swiss:P01730) and a chemokine receptor on the cell s ...	The envelope glycoprotein Gp160 of HIV1 is cleaved into the surface protein Gp120 and the transmembrane protein Gp41. The entry of HIV requires interaction of viral GP120 with the CD4 glycoprotein (Swiss:P01730) and a chemokine receptor on the cell surface [1]. Gp160 us proteolytically cleaved n the trans-Golgi and activated by cellular furin or furin-like proteases to produce gp120 and gp41 [1,2].	Domain
B, F [auth D], J [auth I]	PF00517	Retroviral envelope protein (GP41)	Retroviral envelope protein	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, E [auth C], I [auth G]	SOSIP.664 gp120,SOSIP.664 gp120	structural molecule activity	viral process fusion of virus membrane with host endosome membrane membrane fusion involved in viral entry into host cell membrane organization cellular component organization membrane fusion fusion of virus membrane with host plasma membrane cellular process cellular component organization or biogenesis protein localization regulation of localization regulation of biological process cellular localization regulation of cellular process viral process fusion of virus membrane with host endosome membrane membrane fusion involved in viral entry into host cell membrane organization cellular component organization membrane fusion fusion of virus membrane with host plasma membrane cellular process cellular component organization or biogenesis protein localization regulation of localization regulation of biological process cellular localization regulation of cellular process regulation of protein localization positive regulation of receptor clustering biological regulation positive regulation of biological process positive regulation of protein localization to membrane localization within membrane protein localization to membrane localization regulation of cellular localization cellular macromolecule localization macromolecule localization receptor clustering positive regulation of protein localization regulation of receptor clustering regulation of protein localization to membrane positive regulation of cellular process 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 plasma membrane raft distribution regulation of cellular component organization positive regulation of cellular component organization plasma membrane raft polarization plasma membrane organization membrane raft organization endomembrane system organization membrane raft distribution plasma membrane raft localization membrane raft polarization regulation of plasma membrane raft polarization membrane raft localization regulation of plasma membrane organization positive regulation of plasma membrane raft polarization import into cell receptor-mediated endocytosis of virus by host cell transport establishment of localization vesicle-mediated transport symbiont entry into host cell clathrin-dependent endocytosis symbiont entry into host clathrin-dependent endocytosis of virus by host cell receptor-mediated endocytosis endocytosis endocytosis involved in viral entry into host cell viral gene expression viral protein processing	cellular anatomical structure membrane virion component virion membrane host intracellular membrane-bounded organelle host cellular component host intracellular part host cell membrane host cell cytoplasm part host intracellular organelle host cell endosome membrane host cell cytoplasm host cell part host cell endosome cellular anatomical structure membrane virion component virion membrane host intracellular membrane-bounded organelle host cellular component host intracellular part host cell membrane host cell cytoplasm part host intracellular organelle host cell endosome membrane host cell cytoplasm host cell part host cell endosome host intracellular region viral membrane viral envelope host cell plasma membrane
B, F [auth D], J [auth I]	SOSIP.664 gp41	structural molecule activity	viral process fusion of virus membrane with host endosome membrane membrane fusion involved in viral entry into host cell membrane organization cellular component organization membrane fusion fusion of virus membrane with host plasma membrane cellular process cellular component organization or biogenesis protein localization regulation of localization regulation of biological process cellular localization regulation of cellular process viral process fusion of virus membrane with host endosome membrane membrane fusion involved in viral entry into host cell membrane organization cellular component organization membrane fusion fusion of virus membrane with host plasma membrane cellular process cellular component organization or biogenesis protein localization regulation of localization regulation of biological process cellular localization regulation of cellular process regulation of protein localization positive regulation of receptor clustering biological regulation positive regulation of biological process positive regulation of protein localization to membrane localization within membrane protein localization to membrane localization regulation of cellular localization cellular macromolecule localization macromolecule localization receptor clustering positive regulation of protein localization regulation of receptor clustering regulation of protein localization to membrane positive regulation of cellular process 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 plasma membrane raft distribution regulation of cellular component organization positive regulation of cellular component organization plasma membrane raft polarization plasma membrane organization membrane raft organization endomembrane system organization membrane raft distribution plasma membrane raft localization membrane raft polarization regulation of plasma membrane raft polarization membrane raft localization regulation of plasma membrane organization positive regulation of plasma membrane raft polarization import into cell receptor-mediated endocytosis of virus by host cell transport establishment of localization vesicle-mediated transport symbiont entry into host cell clathrin-dependent endocytosis symbiont entry into host clathrin-dependent endocytosis of virus by host cell receptor-mediated endocytosis endocytosis endocytosis involved in viral entry into host cell viral gene expression viral protein processing	cellular anatomical structure membrane virion component virion membrane host intracellular membrane-bounded organelle host cellular component host intracellular part host cell membrane host cell cytoplasm part host intracellular organelle host cell endosome membrane host cell cytoplasm host cell part host cell endosome cellular anatomical structure membrane virion component virion membrane host intracellular membrane-bounded organelle host cellular component host intracellular part host cell membrane host cell cytoplasm part host intracellular organelle host cell endosome membrane host cell cytoplasm host cell part host cell endosome host intracellular region viral membrane viral envelope host cell plasma membrane
C [auth L], G [auth E], K [auth J]	rabbit antibody 13B Fragment antigen binding light chain	-	-	-
D [auth H], H [auth F], L [auth K]	rabbit antibody 13B Fragment antigen binding heavy chain	-	-	-

InterPro: Protein Family Classification InterPro Database Homepage

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

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.