Annotations: 4R04

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Nucleotide-diphospho-sugar transferases	8099200	3000077	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	TcdA_TcdB_pore_2nd	e4r04A5	A: beta duplicates or obligate multimers	X: Toxin A (TcdA) delivery domain (From Topology)	H: Toxin A (TcdA) delivery domain (From Topology)	T: Toxin A (TcdA) delivery domain	F: TcdA_TcdB_pore_2nd	ECOD (1.6)
A	TcdA_TcdB_pore_1st	e4r04A4	A: alpha arrays	X: Toxin A (TcdA) helical domain (From Topology)	H: Toxin A (TcdA) helical domain (From Topology)	T: Toxin A (TcdA) helical domain	F: TcdA_TcdB_pore_1st	ECOD (1.6)
A	MLD	e4r04A1	A: alpha bundles	X: Bromodomain-like	H: PMT helical bundle domain-like	T: PMT helical bundle domain-like	F: MLD	ECOD (1.6)
A	TcdA_TcdB	e4r04A2	A: a/b three-layered sandwiches	X: Nucleotide-diphospho-sugar transferases (From Topology)	H: Nucleotide-diphospho-sugar transferases (From Topology)	T: Nucleotide-diphospho-sugar transferases	F: TcdA_TcdB	ECOD (1.6)
A	Peptidase_C80	e4r04A3	A: a/b three-layered sandwiches	X: Caspase-like (From Topology)	H: Caspase-like (From Topology)	T: Caspase-like	F: Peptidase_C80	ECOD (1.6)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF12919	TcdA/TcdB catalytic glycosyltransferase domain (TcdA_TcdB)	TcdA/TcdB catalytic glycosyltransferase domain	This domain represents the N-terminal glycosyltransferase from a set of toxins found in some bacteria. This domain in TcdB glycosylates the host RhoA protein.	Domain
A	PF12918	TcdB toxin N-terminal helical domain (TcdB_N)	TcdB toxin N-terminal helical domain	This is a short helical bundle domain found associated with the catalytic domain of the TcdB toxin from C. difficile [1]. The function of this domain is unknown, but it may be involved in substrate recognition.	Domain
A	PF11713	Peptidase C80 family (Peptidase_C80)	Peptidase C80 family	This family belongs to cysteine peptidase family C80.	Domain
A	PF12920	TcdA/TcdB pore forming domain (TcdA_TcdB_pore)	TcdA/TcdB pore forming domain	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Toxin A	glycosyltransferase activity transferase activity catalytic activity binding lipid binding toxin activity cysteine-type peptidase activity peptidase activity catalytic activity, acting on a protein hydrolase activity cation binding ion binding metal ion binding small molecule binding	proteolysis metabolic process cellular process primary metabolic process protein metabolic process macromolecule metabolic process	cellular anatomical structure membrane extracellular region 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 cellular anatomical structure membrane extracellular region 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 host cell plasma membrane host cell cytosol

InterPro: Protein Family Classification InterPro Database Homepage

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

Membrane Protein Annotation: OPM OPM Database Homepage

Chains	External Link	Type	Class	Superfamily	Family
A	OPM	Monotopic/peripheral	Alpha/Beta monotopic/peripheral	Nucleotide-diphospho-sugar transferases	Glycosylating toxin

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.