Annotations: 3D0L

Crystal structure of the HIV-1 broadly neutralizing antibody 2F5 in complex with the gp41 FP-MPER Hyb3K construct 514GIGALFLGFLGAAGS528KK-Ahx-655KNEQELLELDKWASLWN671

External Resource: Annotation

Domain Annotation: ECOD Classification
Domain Annotation: CATH
IMGT Antibody Annotation
SAbDab Antibody Annotation
Protein Family Annotation

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
C	Med6	e3d0lC1	A: alpha arrays	X: Hypothetical protein YqbG-like	H: Hypothetical protein YqbG-like	T: alpha/beta-Hydrolases	F: Med6	ECOD (v295.2)
B	zf-CCCH_4	e3d0lB1	A: alpha arrays	X: HTH	H: HTH	T: tetra-helical, lambda repressor-like	F: zf-CCCH_4	ECOD (v295.2)
A	zf-CCCH_4	e3d0lA1	A: alpha arrays	X: HTH	H: HTH	T: tetra-helical, lambda repressor-like	F: zf-CCCH_4	ECOD (v295.2)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
B	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
A	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
B	2F5 mAb, anti-gp41 membrane-proximal external region (MPER)	VH-CH1	Homo sapiens (human)	IGHV2-502, IGHJ601, IGHJ602, IGHG103	V-DOMAIN VH, C-DOMAIN CH1	IG	FAB-GAMMA-1_KAPPA	IMGT (202640-0)
A	2F5 mAb, anti-gp41 membrane-proximal external region (MPER)	L-KAPPA	Homo sapiens (human)	IGKV1D-1301, IGKV1-1302, IGKJ301, IGKJ401, IGKJ402, IGKC01	V-DOMAIN V-KAPPA, C-DOMAIN C-KAPPA	IG	FAB-GAMMA-1_KAPPA	IMGT (202640-0)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
B	Heavy Chain	IGHV2	-	hyb3k peptide construct	SAbDab (2026-10-16)
A	Light Chain	IGKV1	Kappa	hyb3k peptide construct	SAbDab (2026-10-16)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
B	PF07654	Immunoglobulin C1-set domain (C1-set)	Immunoglobulin C1-set domain		Domain
A	PF07654	Immunoglobulin C1-set domain (C1-set)	Immunoglobulin C1-set domain		Domain