Sulfur oxygenase/reductase

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⁺

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

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

This enzyme belongs to the family of oxidoreductases, specifically those acting on single donors with O₂ as the oxidant and incorporating 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.