Annotations: 9BLX

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
B [auth L]	Fer4_20	e9blxL01	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: Fer4_20	ECOD (v294.2)
A [auth H]	Fer4_20	e9blxH01	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: Fer4_20	ECOD (v294.2)

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
B [auth L], D [auth B]	Light Chain	IGKV1	Kappa	envelope glycoprotein gp160	SAbDab (2026-05-08)
A [auth H], C [auth A]	Heavy Chain	IGHV4	-	envelope glycoprotein gp160	SAbDab (2026-05-08)

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
E [auth I], F [auth G]	Envelope glycoprotein gp160	structural molecule activity	viral process 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 symbiont entry into host cell symbiont entry into host	virion component viral membrane viral envelope host cell plasma membrane host cellular component cellular anatomical structure host cell part host cell membrane other organism part virion membrane host intracellular membrane-bounded organelle host intracellular part host cell cytoplasm part host intracellular organelle virion component viral membrane viral envelope host cell plasma membrane host cellular component cellular anatomical structure host cell part host cell membrane other organism part virion membrane host intracellular membrane-bounded organelle host intracellular part host cell cytoplasm part host intracellular organelle host cell endosome membrane host cell cytoplasm host cell endosome host intracellular region
B [auth L], D [auth B]	ITS111.01 Light	-	-	-
A [auth H], C [auth A]	ITS111.01 Heavy	-	-	-

Chains	Accession	Name	Type
E [auth I], F [auth G]	IPR000777	Human immunodeficiency virus 1, envelope glycoprotein Gp120	Domain
E [auth I], F [auth G]	IPR036377	Gp120 core superfamily	Homologous Superfamily
E [auth I], F [auth G]	IPR000328	Retroviral envelope protein GP41-like	Domain

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.

9BLX | pdb_00009blx