Annotations: 4F58

Fab structure of a neutralizing antibody L3 from an early subtype A HIV-1 infected patient

External Resource: Annotation

Domain Annotation: SCOP/SCOPe Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
IMGT Antibody Annotation
SAbDab Antibody Annotation

Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A [auth L]	d4f58l2	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	C1 set domains (antibody constant domain-like)	automated matches	(Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
A [auth L]	d4f58l1	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	automated matches	automated matches	(Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
C [auth M]	d4f58m2	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	C1 set domains (antibody constant domain-like)	automated matches	(Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
C [auth M]	d4f58m1	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	automated matches	automated matches	(Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
E [auth N]	d4f58n2	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	C1 set domains (antibody constant domain-like)	automated matches	(Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
E [auth N]	d4f58n1	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	automated matches	automated matches	(Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
G [auth O]	d4f58o2	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	C1 set domains (antibody constant domain-like)	automated matches	(Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
G [auth O]	d4f58o1	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	automated matches	automated matches	(Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
B [auth H]	d4f58h_	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	V set domains (antibody variable domain-like)	automated matches	(Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
D [auth I]	d4f58i_	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	V set domains (antibody variable domain-like)	automated matches	(Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
F [auth J]	d4f58j_	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	V set domains (antibody variable domain-like)	automated matches	(Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
H [auth K]	d4f58k_	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	V set domains (antibody variable domain-like)	automated matches	(Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A [auth L]	V-set	e4f58L1	A: a/b three-layered sandwiches	X: beta-Grasp	H: HTH	T: winged helix domain	F: V-set	ECOD (v294.1)
C [auth M]	V-set	e4f58M1	A: a/b three-layered sandwiches	X: beta-Grasp	H: HTH	T: winged helix domain	F: V-set	ECOD (v294.1)
E [auth N]	V-set	e4f58N1	A: a/b three-layered sandwiches	X: beta-Grasp	H: HTH	T: winged helix domain	F: V-set	ECOD (v294.1)
G [auth O]	V-set	e4f58O1	A: a/b three-layered sandwiches	X: beta-Grasp	H: HTH	T: winged helix domain	F: V-set	ECOD (v294.1)
B [auth H]	ABC_tran	e4f58H1	A: a/b three-layered sandwiches	X: beta-Grasp	H: HTH	T: winged helix domain	F: ABC_tran	ECOD (v294.1)
B [auth H]	V-set	e4f58H3	A: a/b three-layered sandwiches	X: Subtilisin-like	H: Subtilisin-like	T: Subtilisin-like	F: V-set	ECOD (v294.1)
D [auth I]	ABC_tran	e4f58I1	A: a/b three-layered sandwiches	X: beta-Grasp	H: HTH	T: winged helix domain	F: ABC_tran	ECOD (v294.1)
D [auth I]	V-set	e4f58I3	A: a/b three-layered sandwiches	X: Subtilisin-like	H: Subtilisin-like	T: Subtilisin-like	F: V-set	ECOD (v294.1)
F [auth J]	ABC_tran	e4f58J1	A: a/b three-layered sandwiches	X: beta-Grasp	H: HTH	T: winged helix domain	F: ABC_tran	ECOD (v294.1)
F [auth J]	V-set	e4f58J3	A: a/b three-layered sandwiches	X: Subtilisin-like	H: Subtilisin-like	T: Subtilisin-like	F: V-set	ECOD (v294.1)
H [auth K]	ABC_tran	e4f58K1	A: a/b three-layered sandwiches	X: beta-Grasp	H: HTH	T: winged helix domain	F: ABC_tran	ECOD (v294.1)

Domain Annotation: CATH CATH Database Homepage

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

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
A [auth L], C [auth M], E [auth N], G [auth O]	Fab L3, broadly Neutralizing antibody	L-LAMBDA	Homo sapiens (human)	IGLV2-1401, IGLJ101, IGLJ201, IGLJ302, IGLJ601, IGLJ301, IGLC201, IGLC202, IGLC3*04	V-DOMAIN V-LAMBDA, C-DOMAIN C-LAMBDA	IG	FAB-GAMMA-1_LAMBDA	IMGT (202615-0)
B [auth H], D [auth I], F [auth J], H [auth K]	Fab L3, broadly Neutralizing antibody	VH-CH1	Homo sapiens (human)	IGHV3-3002, IGHJ101, IGHJ401, IGHJ501, IGHJ502, IGHJ402, IGHJ403, IGHG101, IGHG102, IGHG104	V-DOMAIN VH, C-DOMAIN CH1	IG	FAB-GAMMA-1_LAMBDA	IMGT (202615-0)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
A [auth L], C [auth M], E [auth N], G [auth O]	Light Chain	IGLV2	Lambda	-	SAbDab (2026-04-24)
B [auth H], D [auth I], F [auth J], H [auth K]	Heavy Chain	IGHV3	-	-	SAbDab (2026-04-24)

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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.