Annotations: 4V2K

Crystal structure of the thiosulfate dehydrogenase TsdA in complex with thiosulfate

External Resource: Annotation

Domain Annotation: ECOD Classification
Domain Annotation: CATH
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Protein Modification Annotation
Structure Motif: Primary M-CSA Annotation

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	Polyoma_coat	e4v2kA1	A: alpha arrays	X: Four-helical up-and-down bundle	H: Thymidylate synthase/dCMP hydroxymethylase	T: Thymidylate synthase/dCMP hydroxymethylase	F: Polyoma_coat	ECOD (v295.2)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	1.10.760.10	Mainly Alpha	Orthogonal Bundle	Cytochrome Bc1 Complex	Chain D, domain 2	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF21342	SoxA/TsdA, cytochrome c domain (SoxA-TsdA_cyt-c)	SoxA/TsdA, cytochrome c domain	This entry represents the first cytochrome c domain of SoxA and TsdA proteins, heme proteins involved in sulfur oxidation [1-5].	Domain
A	PF13442	Cytochrome C oxidase, cbb3-type, subunit III (Cytochrome_CBB3)	Cytochrome C oxidase, cbb3-type, subunit III		Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	THIOSULFATE DEHYDROGENASE	binding tetrapyrrole binding heme binding electron transfer activity oxidoreductase activity, acting on a sulfur group of donors oxidoreductase activity, acting on a sulfur group of donors, cytochrome as acceptor thiosulfate dehydrogenase activity oxidoreductase activity catalytic activity	-	cellular anatomical structure extracellular region periplasmic space

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR051459	Cytochrome c-type Dehydrogenase	Family
A	IPR036909	Cytochrome c-like domain superfamily	Homologous Superfamily
A	IPR009056	Cytochrome c-like domain	Domain

Protein Modification Annotation

Modified Residue(s)
Chain	Residue(s)	Description
A	CSS	Parent Component: CYS : AA0269 : L-cysteine persulfide MOD:00274

Structure Motif Annotation: Mechanism and Catalytic Site Atlas M-CSA Database Homepage

Chains	Enzyme Name	Description	Catalytic Residues
A	Thiosulfate dehydrogenase M-CSA #986	Thiosulphate dehydrogenase (TsdA) catalyses the oxidation of two thiosulphate molecules to form tetrathionate and is predicted to use an unusual cysteine-ligated heme as the catalytic cofactor. Thiosulfate and polythionates serve as energy-yielding or electron-donating substrates in the metabolism of a wide range of chemolithotrophic and photolithotrophic bacteria, as well as some heterotrophs. This reaction is interesting because of its potential applications in bioleaching and metal solubilisation.	Defined by 4 residues: ARG:A-82 [auth A-109]ARG:A-92 [auth A-119]CYS:A-96 [auth A-123]SER:A-100 [auth A-127] \| Explore in 3D: M-CSA Motif Definition Search M-CSA Motif EC: 1.8.2.2 (PDB Primary Data) Search M-CSA Motif + EC 1.8.2.2