KEGG   ENZYME: 5.4.4.5Help
Entry
EC 5.4.4.5                  Enzyme                                 

Name
9,12-octadecadienoate 8-hydroperoxide 8R-isomerase;
5,8-LDS (bifunctional enzyme);
5,8-linoleate diol synthase (bifunctional enzyme);
8-hydroperoxide isomerase;
(8R,9Z,12Z)-8-hydroperoxy-9,12-octadecadienoate mutase ((5S,8R,9Z,12Z)-5,8-dihydroxy-9,12-octadecadienoate-forming);
PpoA
Class
Isomerases;
Intramolecular transferases;
Transferring hydroxy groups
BRITE hierarchy
Sysname
(8R,9Z,12Z)-8-hydroperoxyoctadeca-9,12-dienoate hydroxymutase [(5S,8R,9Z,12Z)-5,8-dihydroxyoctadeca-9,12-dienoate-forming]
Reaction(IUBMB)
(8R,9Z,12Z)-8-hydroperoxyoctadeca-9,12-dienoate = (5S,8R,9Z,12Z)-5,8-dihydroxyoctadeca-9,12-dienoate [RN:R09905]
Reaction(KEGG)
Substrate
(8R,9Z,12Z)-8-hydroperoxyoctadeca-9,12-dienoate [CPD:C14831]
Product
(5S,8R,9Z,12Z)-5,8-dihydroxyoctadeca-9,12-dienoate [CPD:C20186]
Comment
The enzyme contains heme [3]. 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 (cf. EC 1.13.11.60, linoleate 8R-lipoxygenase), which is subsequently isomerized to (5S,8R,9Z,12Z)-5,8-dihydroxyoctadeca-9,12-dienoate within the C-terminal P-450 heme thiolate domain [3].
History
EC 5.4.4.5 created 2011
Pathway
Linoleic acid metabolism
Orthology
K17863  
linoleate 8R-lipoxygenase / 9,12-octadecadienoate 8-hydroperoxide 8R-isomerase
Genes
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:21130068]
  Authors
Hoffmann I, Jerneren F, Garscha U, Oliw EH
  Title
Expression of 5,8-LDS of Aspergillus fumigatus and its dioxygenase domain. A comparison with 7,8-LDS, 10-dioxygenase, and cyclooxygenase.
  Journal
Arch. Biochem. Biophys. 506 (2011) 216-22.
  Sequence
Reference
2  [PMID:20045744]
  Authors
Jerneren F, Garscha U, Hoffmann I, Hamberg M, Oliw EH
  Title
Reaction mechanism of 5,8-linoleate diol synthase, 10R-dioxygenase, and 8,11-hydroperoxide isomerase of Aspergillus clavatus.
  Journal
Biochim. Biophys. Acta. 1801 (2010) 503-7.
Reference
3  [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]
Other DBs
ExplorEnz - The Enzyme Database: 
IUBMB Enzyme Nomenclature: 
ExPASy - ENZYME nomenclature database: 
BRENDA, the Enzyme Database: 

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