sulfite dehydrogenase

Sulfite dehydrogenase heterotetramer, Paracoccus pantotrophus

Identifiers
EC number| 1.8.2.1
CAS number| 37256-47-6
Databases
IntEnz| IntEnz view
BRENDA| BRENDA entry
ExPASy| NiceZyme view
KEGG| KEGG entry
MetaCyc| metabolic pathway
PRIAM| profile
PDB structures| RCSB PDB PDBe PDBsum
Gene Ontology| AmiGO  / QuickGO
| Search

PMC| articles
PubMed| articles
NCBI| proteins

In enzymology, a sulfite dehydrogenase (EC 1.8.2.1) is an enzyme that catalyzes the chemical reaction

sulfite + 2 ferricytochrome c + H2O ⇌ sulfate + 2 ferrocytochrome c + 2 H+

The 3 substrates of this enzyme are sulfite, ferricytochrome c, and H2O, whereas its 3 products are sulfate, ferrocytochrome c, and H+.

This enzyme belongs to the family of oxidoreductases, specifically those acting on a sulfur group of donor with a cytochrome as acceptor. The systematic name of this enzyme class is sulfite:ferricytochrome-c oxidoreductase. Other names in common use include sulfite cytochrome c reductase, sulfite-cytochrome c oxidoreductase, and sulfite oxidase. This enzyme participates in sulfur metabolism.

## References

* "Purification and properties of sulfite:cytochrome c oxidoreductase from Thiobacillus novellus". Biochim. Biophys. Acta 128: 522-534. 1966. doi:10.1016/0926-6593(66)90013-0.
* "Properties and role of sulphite:cytochrome c oxidoreductase purified from Thiobacillus versutus (A2)". J. Gen. Microbiol. 130: 1683-1692. 1984. doi:10.1099/00221287-130-7-1683.

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Oxidoreductases: sulfur oxidoreductases (EC 1.8)

1.8.1: NAD or NADP|

* Dihydrolipoamide dehydrogenase
* Glutathione reductase
* Thioredoxin reductase

1.8.2: cytochrome|

* Sulfite dehydrogenase
* Thiosulfate dehydrogenase
* Flavocytochrome c sulfide dehydrogenase

1.8.3: oxygen|

* Sulfite oxidase

1.8.4: disulfide|

* Glutathione—homocystine transhydrogenase

1.8.5: quinone|

* Glutathione dehydrogenase (ascorbate)

1.8.98: Other, known|

* CoB—CoM heterodisulfide reductase

1.8.99: Other|

* Sulfite reductase

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Enzymes

Activity|

* Active site
* Binding site
* Catalytic triad
* Oxyanion hole
* Enzyme promiscuity
* Catalytically perfect enzyme
* Coenzyme
* Cofactor
* Enzyme catalysis

Regulation|

* Allosteric regulation
* Cooperativity
* Enzyme inhibitor
* Enzyme activator

Classification|

* EC number
* Enzyme superfamily
* Enzyme family
* List of enzymes

Kinetics|

* Enzyme kinetics
* Eadie–Hofstee diagram
* Hanes–Woolf plot
* Lineweaver–Burk plot
* Michaelis–Menten kinetics

Types|

* EC1 Oxidoreductases (list)
* EC2 Transferases (list)
* EC3 Hydrolases (list)
* EC4 Lyases (list)
* EC5 Isomerases (list)
* EC6 Ligases (list)
* EC7 Translocases (list)

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