6OQ5 | pdb_00006oq5

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	Choline_bind_1	e6oq5A6	A: alpha bundles	X: Restriction endonuclease-like	H: Restriction endonuclease-like	T: beta-hairpin stack	F: Choline_bind_1	ECOD (develop294)
A	StcE_b-sandwich	e6oq5A1	A: alpha bundles	X: Family A G protein-coupled receptor-like	H: beta-sandwich domain in metalloprotease stcE	T: beta-sandwich domain in metalloprotease stcE	F: StcE_b-sandwich	ECOD (develop294)
A	HORMA	e6oq5A2	A: alpha bundles	X: Immunoglobulin-like beta-sandwich	H: Anticodon-binding domain of a subclass of class I aminoacyl-tRNA synthetases	T: Anticodon-binding domain of a subclass of class I aminoacyl-tRNA synthetases	F: HORMA	ECOD (develop294)
D [auth F]	ATP-synt	e6oq5F1	A: alpha bundles	X: Ten stranded beta/alpha barrel	H: Ten stranded beta/alpha barrel	T: Ten stranded beta/alpha barrel	F: ATP-synt	ECOD (develop294)
C [auth E]	ATP-synt	e6oq5E1	A: alpha bundles	X: Ten stranded beta/alpha barrel	H: Ten stranded beta/alpha barrel	T: Ten stranded beta/alpha barrel	F: ATP-synt	ECOD (develop294)
B [auth D]	ATP-synt	e6oq5D1	A: alpha bundles	X: Ten stranded beta/alpha barrel	H: Ten stranded beta/alpha barrel	T: Ten stranded beta/alpha barrel	F: ATP-synt	ECOD (develop294)

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	1.10.10.1780	Mainly Alpha	Orthogonal Bundle	Arc Repressor Mutant, subunit A		CATH (utative)
A	3.40.50.11050	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	MARTX cysteine protease (CPD) domain	CATH (utative)
A	2.10.270.10	Mainly Beta	Ribbon	left handed beta-beta-3-solenoid	Cholin Binding	CATH (utative)

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
D [auth F]	Heavy Chain	IGHV1	-	toxin b	SAbDab (2026-03-20)
B [auth D]	Heavy Chain	IGHV1	-	toxin b	SAbDab (2026-03-20)

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Toxin B	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 extracellular region host intracellular membrane-bounded organelle host cellular component host intracellular part host cell membrane other organism part 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 extracellular region host intracellular membrane-bounded organelle host cellular component host intracellular part host cell membrane other organism part 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
D [auth F]	7F	-	-	-
C [auth E]	E3	-	-	-
B [auth D]	5D	-	-	-

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

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. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.

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