Sulfur dioxygenase (, ''sulfur oxygenase'', ''sulfur:oxygen oxidoreductase'') is an
enzyme
Enzymes () are proteins that act as biological catalysts by accelerating chemical reactions. The molecules upon which enzymes may act are called substrates, and the enzyme converts the substrates into different molecules known as products ...
with
systematic name A systematic name is a name given in a systematic way to one unique group, organism, object or chemical substance, out of a specific population or collection. Systematic names are usually part of a nomenclature.
A semisystematic name or semitrivial ...
''S-sulfanylglutathione:oxygen oxidoreductase''. This enzyme
catalyses the following
chemical reaction
A chemical reaction is a process that leads to the IUPAC nomenclature for organic transformations, chemical transformation of one set of chemical substances to another. Classically, chemical reactions encompass changes that only involve the pos ...
:
sulfur + O
2 + H
2O
sulfite + 2 H
+ (overall reaction)
: (1a)
glutathione
Glutathione (GSH, ) is an antioxidant in plants, animals, fungi, and some bacteria and archaea. Glutathione is capable of preventing damage to important cellular components caused by sources such as reactive oxygen species, free radicals, pe ...
+ sulfur
S-sulfanylglutathione (spontaneous reaction)
: (1b) S-sulfanylglutathione + O
2 + H
2O
glutathione + sulfite + 2 H
+
This enzyme contains iron.
In humans, sulfur dioxygenase is needed to detoxify sulfide.
References
External links
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EC 1.13.11