Annotations: 4IDJ

S.Aureus a-hemolysin monomer in complex with Fab

External Resource: Annotation

Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
IMGT Antibody Annotation
SAbDab Antibody Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Leukocidin-like	8037938	3000256	SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
C [auth L]	PEPCK_N	e4idjL1	A: beta barrels	X: PBZ domain	H: PBZ domain	T: PBZ domain	F: PEPCK_N	ECOD (v294.2)
B [auth H]	PEPCK_N	e4idjH1	A: beta barrels	X: PBZ domain	H: PBZ domain	T: PBZ domain	F: PEPCK_N	ECOD (v294.2)
A	PEPCK_N	e4idjA1	A: beta barrels	X: PBZ domain	H: PBZ domain	T: PBZ domain	F: PEPCK_N	ECOD (v294.2)

Domain Annotation: CATH CATH Database Homepage

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)
A	2.70.240.10	Mainly Beta	Distorted Sandwich	Leukocidin-like	Leukocidin/porin MspA	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
C [auth L]	FAB-GAMMA-2_KAPPA	L-KAPPA	Homo sapiens (human)	IGKV3-2001, IGKJ101, IGKJ201, IGKJ301, IGKC01, IGKC04	V-DOMAIN V-KAPPA, C-DOMAIN C-KAPPA	IG	FAB-GAMMA-2_KAPPA	IMGT (202617-0)
B [auth H]	FAB-GAMMA-2_KAPPA	VH-CH1	Homo sapiens (human)	IGHV1-6906, IGHV1-6910, IGHV1-6914, IGHJ302, IGHG201, IGHG206, IGHG205, IGHG203	V-DOMAIN VH, C-DOMAIN CH1	IG	FAB-GAMMA-2_KAPPA	IMGT (202617-0)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
C [auth L]	Light Chain	IGKV3	Kappa	alpha-hemolysin	SAbDab (2026-05-08)
B [auth H]	Heavy Chain	IGHV1	-	alpha-hemolysin	SAbDab (2026-05-08)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
C [auth L]	Fab Light chain	-	-	-
B [auth H]	Fab Heavy chain	-	-	-
A	Alpha-hemolysin	identical protein binding protein binding binding toxin activity	biological process involved in interspecies interaction between organisms cytolysis in another organism cellular process disruption of cell in another organism disruption of anatomical structure in another organism cytolysis killing of cells of another organism cell killing	cellular anatomical structure extracellular region

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR016183	Leukocidin/Hemolysin toxin	Domain
A	IPR005831	Aerolysin/haemolysin toxin, conserved site	Conserved Site
A	IPR036435	Leukocidin/porin MspA superfamily	Homologous Superfamily
A	IPR003963	Bi-component toxin, staphylococci	Family

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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.