KEGG   ENZYME: 1.13.11.60Help
Entry
EC 1.13.11.60               Enzyme                                 

Name
linoleate 8R-lipoxygenase;
linoleic acid 8R-dioxygenase;
5,8-LDS (bifunctional enzyme);
7,8-LDS (bifunctional enzyme);
5,8-linoleate diol synthase (bifunctional enzyme);
7,8-linoleate diol synthase (bifunctional enzyme);
PpoA
Class
Oxidoreductases;
Acting on single donors with incorporation of molecular oxygen (oxygenases);
With incorporation of two atoms of oxygen
BRITE hierarchy
Sysname
linoleate:oxygen (8R)-oxidoreductase
Reaction(IUBMB)
linoleate + O2 = (8R,9Z,12Z)-8-hydroperoxyoctadeca-9,12-dienoate [RN:R07061]
Reaction(KEGG)
Substrate
linoleate [CPD:C01595];
O2 [CPD:C00007]
Product
(8R,9Z,12Z)-8-hydroperoxyoctadeca-9,12-dienoate [CPD:C14831]
Comment
The enzyme contains heme [1,4]. The bifunctional enzyme from Aspergillus nidulans uses different heme domains to catalyse two separate reactions. Linoleic acid is oxidized within the N-terminal heme peroxidase domain to (8R,9Z,12Z)-8-hydroperoxyoctadeca-9,12-dienoate, which is subsequently isomerized by the C-terminal P-450 heme thiolate domain to (5S,8R,9Z,12Z)-5,8-dihydroxyoctadeca-9,12-dienoate (cf. EC 5.4.4.5, 9,12-octadecadienoate 8-hydroperoxide 8R-isomerase) [1]. The bifunctional enzyme from Gaeumannomyces graminis also catalyses the oxidation of linoleic acid to (8R,9Z,12Z)-8-hydroperoxyoctadeca-9,12-dienoate, but its second domain isomerizes it to (7S,8S,9Z,12Z)-5,8-dihydroxyoctadeca-9,12-dienoate (cf. EC 5.4.4.6, 9,12-octadecadienoate 8-hydroperoxide 8S-isomerase) [4].
History
EC 1.13.11.60 created 2011
Pathway
Linoleic acid metabolism
Orthology
K17863  
linoleate 8R-lipoxygenase / 9,12-octadecadienoate 8-hydroperoxide 8R-isomerase
K17864  
linoleate 8R-lipoxygenase / 9,12-octadecadienoate 8-hydroperoxide 8S-isomerase
Genes
PAN: 
MGR: 
ANI: 
AFM: 
AOR: 
AOR_1_2026154(AO090003001138)
ANG: 
ANI_1_966184(An04g05880)
AFV: 
ACT: 
NFI: 
PCS: 
CIM: 
CPW: 
PBL: 
URE: 
TVE: 
AJE: 
 » show all
Taxonomy
Reference
1  [PMID:19286665]
  Authors
Brodhun F, Gobel C, Hornung E, Feussner I
  Title
Identification of PpoA from Aspergillus nidulans as a fusion protein of a fatty acid heme dioxygenase/peroxidase and a cytochrome P450.
  Journal
J. Biol. Chem. 284 (2009) 11792-805.
  Sequence
[ani:AN1967.2]
Reference
2  [PMID:8117115]
  Authors
Hamberg M, Zhang LY, Brodowsky ID, Oliw EH.
  Title
Sequential oxygenation of linoleic acid in the fungus Gaeumannomyces graminis: stereochemistry of dioxygenase and hydroperoxide isomerase reactions.
  Journal
Arch. Biochem. Biophys. 309 (1994) 77-80.
Reference
3  [PMID:18586008]
  Authors
Garscha U, Oliw E
  Title
Pichia expression and mutagenesis of 7,8-linoleate diol synthase change the dioxygenase and hydroperoxide isomerase.
  Journal
Biochem. Biophys. Res. Commun. 373 (2008) 579-83.
Reference
4  [PMID:8662736]
  Authors
Su C, Oliw EH.
  Title
Purification and characterization of linoleate 8-dioxygenase from the fungus Gaeumannomyces graminis as a novel hemoprotein.
  Journal
J. Biol. Chem. 271 (1996) 14112-8.
  Sequence
Other DBs
ExplorEnz - The Enzyme Database: 
IUBMB Enzyme Nomenclature: 
ExPASy - ENZYME nomenclature database: 
BRENDA, the Enzyme Database: 

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