5FCU | pdb_00005fcu

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
C [auth L]	d5fcul2	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	C1 set domains (antibody constant domain-like)	automated matches	RHESUS MACAQUE (Macaca mulatta ) [TaxId: 9544 ],	SCOPe (2.08)
C [auth L]	d5fcul1	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	automated matches	automated matches	RHESUS MACAQUE (Macaca mulatta ) [TaxId: 9544 ],	SCOPe (2.08)
B [auth H]	d5fcuh_	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	automated matches	automated matches	RHESUS MACAQUE (Macaca mulatta ) [TaxId: 9544 ],	SCOPe (2.08)

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A [auth G]	Pre-SET	e5fcuG1	A: a/b three-layered sandwiches	X: alpha/beta knot	H: alpha/beta knot	T: alpha/beta knot	F: Pre-SET	ECOD (v294.1)
C [auth L]	HABP4_PAI-RBP1	e5fcuL2	A: a/b three-layered sandwiches	X: HTH	H: Baseplate wedge protein gp6 helical domain	T: Baseplate wedge protein gp6 helical domain	F: HABP4_PAI-RBP1	ECOD (v294.1)
B [auth H]	HABP4_PAI-RBP1	e5fcuH1	A: a/b three-layered sandwiches	X: HTH	H: Baseplate wedge protein gp6 helical domain	T: Baseplate wedge protein gp6 helical domain	F: HABP4_PAI-RBP1	ECOD (v294.1)

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
C [auth L]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
B [auth H]	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 L]	JR4 Fab	L-LAMBDA	Macaca mulatta (Rhesus monkey)	IGLV1S601, IGLJ601, IGLC6*01	V-DOMAIN V-LAMBDA, C-DOMAIN C-LAMBDA	IG	FAB-GAMMA-1_LAMBDA	IMGT (202612-0)
B [auth H]	JR4 Fab	VH-CH1	Macaca mulatta (Rhesus monkey)	IGHV4-15001, IGHJ5-202, IGHG102, IGHG101	V-DOMAIN VH, C-DOMAIN CH1	IG	FAB-GAMMA-1_LAMBDA	IMGT (202612-0)

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
C [auth L]	Light Chain	IGLV1	Lambda	clade a/e 93th057 hiv-1 gp120 core	SAbDab (2026-03-27)
B [auth H]	Heavy Chain	IGHV4	-	clade a/e 93th057 hiv-1 gp120 core	SAbDab (2026-03-27)

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A [auth G]	clade A/E 93TH057 HIV-1 gp120 core	-	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 virion membrane
C [auth L]	JR4 FAB LIGHT CHAIN	-	-	-
B [auth H]	JR4 FAB HEAVY CHAIN	-	-	-

Chains	Accession	Name	Type
A [auth G]	IPR000777	Human immunodeficiency virus 1, envelope glycoprotein Gp120	Domain
A [auth G]	IPR036377	Gp120 core superfamily	Homologous Superfamily

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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