Annotations: 1ZEA

Structure of the anti-cholera toxin antibody Fab fragment TE33 in complex with a D-peptide

External Resource: Annotation

Domain Annotation: ECOD Classification
Domain Annotation: CATH
IMGT Antibody Annotation
SAbDab Antibody Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Protein Modification Annotation

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
B [auth H]	Hepar_II_III	e1zeaH1	A: beta barrels	X: HTH	H: Nudix	T: winged helix domain	F: Hepar_II_III	ECOD (v294.2)
A [auth L]	Hepar_II_III	e1zeaL1	A: beta barrels	X: HTH	H: Nudix	T: winged helix domain	F: Hepar_II_III	ECOD (v294.2)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
B [auth H]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
A [auth L]	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 H]	TE33	VH-CH1	Mus musculus (house mouse)	IGHV9-301, IGHJ103, IGHG1*02	V-DOMAIN VH, C-DOMAIN CH1	IG	FAB-GAMMA-1_KAPPA	IMGT (202617-0)
A [auth L]	TE33	L-KAPPA	Mus musculus (house mouse)	IGKV1-11701, IGKJ401, IGKC01, IGKC02	V-DOMAIN V-KAPPA, C-DOMAIN C-KAPPA	IG	FAB-GAMMA-1_KAPPA	IMGT (202617-0)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
B [auth H]	Heavy Chain	IGHV9	-	short synthetic d-amino acid peptide d2	SAbDab (2026-05-08)
A [auth L]	Light Chain	IGKV1	Kappa	short synthetic d-amino acid peptide d2	SAbDab (2026-05-08)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
C [auth A]	short synthetic D-amino acid peptide D2	-	-	-
B [auth H]	monoclonal anti-cholera toxin IGG1 KAPPA antibody, H chain	-	response to stimulus immune response immune system process adaptive immune response	cell periphery cellular anatomical structure plasma membrane membrane protein-containing complex immunoglobulin complex extracellular region
A [auth L]	monoclonal anti-cholera toxin IGG1 KAPPA antibody, L chain	cation binding ion binding binding metal ion binding small molecule binding	response to stimulus immune response immune system process adaptive immune response	cellular anatomical structure extracellular region cell periphery plasma membrane membrane protein-containing complex immunoglobulin complex

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
B [auth H]	IPR050199	Immunoglobulin Heavy Variable	Family
B [auth H]	IPR013783	Immunoglobulin-like fold	Homologous Superfamily
B [auth H]	IPR036179	Immunoglobulin-like domain superfamily	Homologous Superfamily
B [auth H]	IPR003598	Immunoglobulin subtype 2	Domain
B [auth H]	IPR013106	Immunoglobulin V-set domain	Domain
B [auth H]	IPR003599	Immunoglobulin domain subtype	Domain
B [auth H]	IPR007110	Immunoglobulin-like domain	Domain
A [auth L]	IPR050150	Immunoglobulin Variable Light Chain	Family
A [auth L]	IPR036179	Immunoglobulin-like domain superfamily	Homologous Superfamily
A [auth L]	IPR003597	Immunoglobulin C1-set	Domain
A [auth L]	IPR013783	Immunoglobulin-like fold	Homologous Superfamily
A [auth L]	IPR013106	Immunoglobulin V-set domain	Domain
A [auth L]	IPR003599	Immunoglobulin domain subtype	Domain
A [auth L]	IPR007110	Immunoglobulin-like domain	Domain
A [auth L]	IPR003006	Immunoglobulin/major histocompatibility complex, conserved site	Conserved Site

Protein Modification Annotation

Modified Residue(s)
Chain	Residue(s)	Description
C [auth A]	DAS	: AA0190 : D-aspartic acid (Asp) MOD:01921 , D-aspartic acid (Asn) MOD:01930
C [auth A]	DGN	: AA0190
C [auth A]	DHI	: AA0190
C [auth A]	DPR	: AA0190
C [auth A]	DSN	: AA0190 , AA0195 , AA0624 : D-aspartic acid (Asp) MOD:01921 , D-aspartic acid (Asn) MOD:01930 , D-serine (Ser) MOD:00202 , D-serine MOD:00891 , D-serine (Cys) MOD:00892 , 2-(L-cystein-S-yl)-D-serine MOD:01987
C [auth A]	DTY	: AA0190 , AA0195 , AA0624
C [auth A]	DVA	: AA0190 , AA0195 , AA0624 , AA0200 : D-aspartic acid (Asp) MOD:01921 , D-aspartic acid (Asn) MOD:01930 , D-serine (Ser) MOD:00202 , D-serine MOD:00891 , D-serine (Cys) MOD:00892 , 2-(L-cystein-S-yl)-D-serine MOD:01987 , D-valine MOD:00705

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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.