4NRX | pdb_00004nrx

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
E [auth D]	MreC	e4nrxD1	A: alpha bundles	X: DEATH domain	H: HTH	T: winged helix domain	F: MreC	ECOD (develop294)
D [auth A]	MreC	e4nrxA1	A: alpha bundles	X: DEATH domain	H: HTH	T: winged helix domain	F: MreC	ECOD (develop294)
C [auth H]	Glyco_hydro_2	e4nrxH3	A: alpha bundles	X: Fusion glycoprotein F2	H: MoeA-I/Ornithine decarboxylase-C/Reverse ferredoxin-like domain in RNA-polymerase	T: MoeA-I/Ornithine decarboxylase-C/Reverse ferredoxin-like domain in RNA-polymerase	F: Glyco_hydro_2	ECOD (develop294)
H [auth E]	MreC	e4nrxE1	A: alpha bundles	X: DEATH domain	H: HTH	T: winged helix domain	F: MreC	ECOD (develop294)
G [auth B]	MreC	e4nrxB1	A: alpha bundles	X: DEATH domain	H: HTH	T: winged helix domain	F: MreC	ECOD (develop294)
F [auth L]	Acylphosphatase	e4nrxL1	A: alpha bundles	X: Rossmann-like	H: Rossmann-related	T: Nucleotide-binding domain	F: Acylphosphatase	ECOD (develop294)

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
E [auth D]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
D [auth A]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
C [auth H]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
H [auth E]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
G [auth B]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
F [auth L]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)

Chain	Protein Name	Description	Organism Name	Gene Allele Name(s)	Domain Name(s)	Receptor Type	Receptor Description	Provenance Source
C [auth H], D [auth A], E [auth D]	N-terminal region [HIV-1], neutralizing	VH-CH1	Homo sapiens (human)	IGHV5-5101, IGHV5-5103, IGHJ601, IGHJ602, IGHG101, IGHG102, IGHG1*04	V-DOMAIN VH, C-DOMAIN CH1	IG	FAB-GAMMA-1_KAPPA	IMGT (202610-0)
F [auth L], G [auth B], H [auth E]	N-terminal region [HIV-1], neutralizing	L-KAPPA	Homo sapiens (human)	IGKV1-3901, IGKV1D-3901, IGKJ301, IGKC01	V-DOMAIN V-KAPPA, C-DOMAIN C-KAPPA	IG	FAB-GAMMA-1_KAPPA	IMGT (202610-0)

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
C [auth H], D [auth A], E [auth D]	Heavy Chain	IGHV5	-	envelope glycoprotein gp41	SAbDab (2026-03-20)
F [auth L], G [auth B], H [auth E]	Light Chain	IGKV1	Kappa	envelope glycoprotein gp41	SAbDab (2026-03-20)

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A [auth P], B [auth C]	Envelope glycoprotein gp41	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
C [auth H], D [auth A], E [auth D]	m66 Heavy Chain	-	-	-
F [auth L], G [auth B], H [auth E]	m66 Light Chain	-	-	-

Chains	Accession	Name	Type
A [auth P], B [auth C]	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.

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