Sulfur oxygenase/reductase

Sulfur oxygenase/reductase
Sulfur oxygenase reductase homo24mer, Acidianus ambivalens
Identifiers
EC no.	1.13.11.55
Databases
IntEnz	IntEnz view
BRENDA	BRENDA entry
ExPASy	NiceZyme view
KEGG	KEGG entry
MetaCyc	metabolic pathway
PRIAM	profile
PDB structures	RCSB PDB PDBe PDBsum
Search PMC articles PubMed articles NCBI proteins

In enzymology, a sulfur oxygenase/reductase (EC 1.13.11.55) is an enzyme that catalyzes the chemical reaction

4 sulfur + 4 H₂O + O₂ ${\displaystyle \rightleftharpoons }$ 2 hydrogen sulfide + 2 bisulfite + 2 H⁺

The 3 substrates of this enzyme are sulfur, H₂O, and O₂, whereas its 3 products are hydrogen sulfide, bisulfite, and H⁺.

This enzyme belongs to the family of oxidoreductases, specifically those acting on single donors with O₂ as oxidant and incorporation of two atoms of oxygen into the substrate (oxygenases). The oxygen incorporated need not be derived from O₂. The systematic name of this enzyme class is sulfur:oxygen oxidoreductase (hydrogen-sulfide- and sulfite-forming). Other names in common use include SOR, sulfur oxygenase, and sulfur oxygenase reductase.

References[]

• Kletzin A (1989). "Coupled enzymatic production of sulfite, thiosulfate, and hydrogen sulfide from sulfur: purification and properties of a sulfur oxygenase reductase from the facultatively anaerobic archaebacterium Desulfurolobus ambivalens". J. Bacteriol. 171 (3): 1638–43. PMC 209792. PMID 2493451.
• Kletzin A (1992). "Molecular characterization of the sor gene, which encodes the sulfur oxygenase/reductase of the thermoacidophilic Archaeum Desulfurolobus ambivalens". J. Bacteriol. 174 (18): 5854–9. PMC 207119. PMID 1522063.
• Sun CW, Chen ZW, He ZG, Zhou PJ, Liu SJ (2003). "Purification and properties of the sulfur oxygenase/reductase from the acidothermophilic archaeon, Acidianus strain S5". Extremophiles. 7 (2): 131–4. doi:10.1007/s00792-002-0304-5. PMID 12664265.
• Urich T, Bandeiras T, Leal S, Rachel R, Albrecht T, Zimmermann P, Scholz C, Teixeira M, Gomes CM, Kletzin A (2004). "The sulphur oxygenase reductase from Acidianus ambivalens is a multimeric protein containing a low-potential mononuclear non-haem iron centre". Biochem. J. 381 (Pt 1): 137–46. doi:10.1042/BJ20040003. PMC 1133771. PMID 15030315.