Annotations: 2YKL

Structure of human anti-nicotine Fab fragment in complex with nicotine-11-yl-methyl-(4-ethylamino-4-oxo)-butanoate

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)
B [auth L]	d2ykll2	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	C1 set domains (antibody constant domain-like)	automated matches	HUMAN (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
B [auth L]	d2ykll1	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	automated matches	automated matches	HUMAN (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)
B [auth L]	Reo_sigma1	e2yklL2	A: a/b three-layered sandwiches	X: Lipocalins/Streptavidin	H: Zn-dependent exopeptidases	T: Zn-dependent exopeptidases	F: Reo_sigma1	ECOD (v294.1)
A [auth H]	C1-set	e2yklH3	A: a/b three-layered sandwiches	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: C1-set	ECOD (v294.1)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
B [auth L]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
A [auth H]	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 [auth L]	Fab, anti-nicotine	L-LAMBDA	Homo sapiens (human)	IGLV1-4701, IGLJ701, IGLJ702, IGLC201, IGLC202, IGLC304	V-DOMAIN V-LAMBDA, C-DOMAIN C-LAMBDA	IG	FAB-GAMMA-2_LAMBDA	IMGT (202615-0)
A [auth H]	Fab, anti-nicotine	VH-CH1	Homo sapiens (human)	IGHV4-3901, IGHV4-3907, IGHJ101, IGHJ501, IGHJ502, IGHG201, IGHG206, IGHG205, IGHG2*03	V-DOMAIN VH, C-DOMAIN CH1	IG	FAB-GAMMA-2_LAMBDA	IMGT (202615-0)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
B [auth L]	Light Chain	IGLV1	Lambda	NICOTINE-11-YL-METHYL-(4-ETHYLAMINO-4-OXO)-BUTANOATE	SAbDab (2026-04-24)
A [auth H]	Heavy Chain	IGHV4	-	NICOTINE-11-YL-METHYL-(4-ETHYLAMINO-4-OXO)-BUTANOATE	SAbDab (2026-04-24)

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