3PEE

Structure of the C. difficile TcdB cysteine protease domain

External Resource: Annotation

Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
Protein Family 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 [auth B]	SCOP2B Superfamily	Caspase-like	8104069	3001096	SCOP2B (2022-06-29)
B [auth A]	SCOP2B Superfamily	Caspase-like	8104069	3001096	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)
A [auth B]	PF11713	e3peeB1	A: a/b three-layered sandwiches	X: Caspase-like (From Topology)	H: Caspase-like (From Topology)	T: Caspase-like	F: PF11713	ECOD (1.6)
B [auth A]	PF11713	e3peeA1	A: a/b three-layered sandwiches	X: Caspase-like (From Topology)	H: Caspase-like (From Topology)	T: Caspase-like	F: PF11713	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A [auth B]	3.40.50.11050	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	MARTX cysteine protease (CPD) domain	CATH (4.3.0)
B [auth A]	3.40.50.11050	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	MARTX cysteine protease (CPD) domain	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A [auth B], B [auth A]	PF11713	Peptidase C80 family (Peptidase_C80)	Peptidase C80 family	This family belongs to cysteine peptidase family C80.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A [auth B], B [auth A]	Toxin B	glycosyltransferase activity transferase activity catalytic activity binding lipid binding peptidase activity catalytic activity, acting on a protein hydrolase activity toxin activity cation binding ion binding metal ion binding small molecule binding	organic substance metabolic process organonitrogen compound metabolic process proteolysis metabolic process primary metabolic process protein metabolic process macromolecule metabolic process	extracellular region cellular anatomical entity host intracellular membrane-bounded organelle host cellular component host intracellular part host cell membrane host cell cytoplasm part host intracellular organelle host cell endosome membrane host cell cytoplasm host cell part host cell endosome host intracellular region cell periphery extracellular region cellular anatomical entity host intracellular membrane-bounded organelle host cellular component host intracellular part host cell membrane host cell cytoplasm part host intracellular organelle host cell endosome membrane host cell cytoplasm host cell part host cell endosome host intracellular region cell periphery plasma membrane membrane host cell plasma membrane host cell cytosol

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A [auth B], B [auth A]	IPR038383	CGT/MARTX, cysteine protease (CPD) domain superfamily	Homologous Superfamily
A [auth B], B [auth A]	IPR024772	TcdA/TcdB toxin, N-terminal helical domain	Domain
A [auth B], B [auth A]	IPR020974	CGT/MARTX, cysteine protease (CPD) domain	Domain
A [auth B], B [auth A]	IPR024769	TcdA/TcdB toxin, pore forming domain	Domain
A [auth B], B [auth A]	IPR029044	Nucleotide-diphospho-sugar transferases	Homologous Superfamily
A [auth B], B [auth A]	IPR020972	Dermonecrotic/RTX toxin, membrane localization domain	Domain
A [auth B], B [auth A]	IPR024770	TcdA/TcdB toxin, catalytic glycosyltransferase domain	Domain
A [auth B], B [auth A]	IPR018337	Cell wall/choline-binding repeat	Repeat

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), 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 R01GM133198.