4JY4 | pdb_00004jy4

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
B [auth A]	d4jy4a1	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	automated matches	automated matches	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
A [auth B]	d4jy4b_	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	automated matches	automated matches	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
B [auth A]	Pyr_redox_2	e4jy4A1	A: a/b three-layered sandwiches	X: SSHS domain	H: Class II aaRS and biotin synthetases	T: Ribosome modulation factor	F: Pyr_redox_2	ECOD (v294.1)
A [auth B]	Pyr_redox_2	e4jy4B1	A: a/b three-layered sandwiches	X: SSHS domain	H: Class II aaRS and biotin synthetases	T: Ribosome modulation factor	F: Pyr_redox_2	ECOD (v294.1)

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
B [auth A]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
A [auth B]	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
B [auth A]	PGT121 mAb, anti-gp120 [HIV-1], broadly neutralizing	L-LAMBDA	Homo sapiens (human)	IGLV3-2101, IGLJ302, IGLC3*03	V-DOMAIN V-LAMBDA, C-DOMAIN C-LAMBDA	IG	FAB-GAMMA-1_LAMBDA	IMGT (202611-0)
A [auth B]	PGT121 mAb, anti-gp120 [HIV-1], broadly neutralizing	VH-CH1	Homo sapiens (human)	IGHV4-5901, IGHV4-5908, IGHV4-408, IGHJ603, IGHG1*03	V-DOMAIN VH, C-DOMAIN CH1	IG	FAB-GAMMA-1_LAMBDA	IMGT (202611-0)

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
A [auth B]	Heavy Chain	IGHV4	-	-	SAbDab (2026-03-27)

Chain	Name	Target	Provenance Source
B [auth A]	Elipovimab	HIV-1 gp120	Therapeutic SAbDab (2026-03-27)
A [auth B]	Elipovimab	HIV-1 gp120	Therapeutic SAbDab (2026-03-27)

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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