KEGG   ENZYME: 1.13.11.55Help
Entry
EC 1.13.11.55               Enzyme                                 

Name
sulfur oxygenase/reductase;
SOR;
sulfur oxygenase;
sulfur oxygenase reductase
Class
Oxidoreductases;
Acting on single donors with incorporation of molecular oxygen (oxygenases);
With incorporation of two atoms of oxygen
BRITE hierarchy
Sysname
sulfur:oxygen oxidoreductase (hydrogen-sulfide- and sulfite-forming)
Reaction(IUBMB)
4 sulfur + 4 H2O + O2 = 2 hydrogen sulfide + 2 sulfite [RN:R07365]
Reaction(KEGG)
Substrate
sulfur [CPD:C00087];
H2O [CPD:C00001];
O2 [CPD:C00007]
Product
hydrogen sulfide [CPD:C00283];
sulfite [CPD:C00094]
Comment
This enzyme, which is found in thermophilic microorganisms, contains one mononuclear none-heme iron centre per subunit. Elemental sulfur is both the electron donor and one of the two known acceptors, the other being oxygen. Thiosulfate is also observed as a product, but is likely formed non-enzymically by a reaction between sulfite and sulfur [1]. This enzyme differs from EC 1.13.11.18, sulfur dioxygenase and EC 1.12.98.4, sulfhydrogenase, in that both activities occur simultaneously.
History
EC 1.13.11.55 created 2006
Pathway
Sulfur metabolism
Microbial metabolism in diverse environments
Orthology
K16952  
sulfur oxygenase/reductase
Genes
TNI: 
TTI: 
HNA: 
DBA: 
ACZ: 
AFI: 
SAY: 
SAP: 
AAE: 
aq_455(sor)
PTO: 
FAC: 
STO: 
AHO: 
 » show all
Taxonomy
Reference
1  [PMID:2493451]
  Authors
Kletzin A.
  Title
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.
  Journal
J. Bacteriol. 171 (1989) 1638-43.
Reference
2  [PMID:1522063]
  Authors
Kletzin A.
  Title
Molecular characterization of the sor gene, which encodes the sulfur oxygenase/reductase of the thermoacidophilic Archaeum Desulfurolobus ambivalens.
  Journal
J. Bacteriol. 174 (1992) 5854-9.
  Sequence
Reference
3  [PMID:12664265]
  Authors
Sun CW, Chen ZW, He ZG, Zhou PJ, Liu SJ.
  Title
Purification and properties of the sulfur oxygenase/reductase from the acidothermophilic archaeon, Acidianus strain S5.
  Journal
Extremophiles. 7 (2003) 131-4.
Reference
4  [PMID:15030315]
  Authors
Urich T, Bandeiras TM, Leal SS, Rachel R, Albrecht T, Zimmermann P, Scholz C, Teixeira M, Gomes CM, Kletzin A.
  Title
The sulphur oxygenase reductase from Acidianus ambivalens is a multimeric protein containing a low-potential mononuclear non-haem iron centre.
  Journal
Biochem. J. 381 (2004) 137-46.
Other DBs
ExplorEnz - The Enzyme Database: 
IUBMB Enzyme Nomenclature: 
ExPASy - ENZYME nomenclature database: 
BRENDA, the Enzyme Database: 
CAS: 
120598-92-7

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