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In enzymology, a linoleate diol synthase (EC 1.13.11.44) is an enzyme that catalyzes the chemical reaction
| Linoleate diol synthase | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Identifiers | |||||||||
| EC no. | 1.13.11.44 | ||||||||
| Databases | |||||||||
| IntEnz | IntEnz view | ||||||||
| BRENDA | BRENDA entry | ||||||||
| ExPASy | NiceZyme view | ||||||||
| KEGG | KEGG entry | ||||||||
| MetaCyc | metabolic pathway | ||||||||
| PRIAM | profile | ||||||||
| PDB structures | RCSB PDB PDBe PDBsum | ||||||||
| |||||||||
- linoleate + O2 (9Z,12Z)-(7S,8S)-dihydroxyoctadeca-9,12-dienoate
Thus, the two substrates of this enzyme are linoleate and O2, whereas its product is (9Z,12Z)-(7S,8S)-dihydroxyoctadeca-9,12-dienoate.
This enzyme belongs to the family of oxidoreductases, specifically those acting on single donors with O2 as oxidant and incorporation of 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 linoleate:oxygen 7S,8S-oxidoreductase. This enzyme is also called linoleate (8R)-dioxygenase. This enzyme participates in linoleic acid metabolism.
References
edit- Brodowsky ID, Hamberg M, Oliw EH (1992). "A linoleic acid (8R)-dioxygenase and hydroperoxide isomerase of the fungus Gaeumannomyces graminis. Biosynthesis of (8R)-hydroxylinoleic acid and (7S,8S)-dihydroxylinoleic acid from (8R)-hydroperoxylinoleic acid". J. Biol. Chem. 267 (21): 14738–45. PMID 1634517.
- Hamberg M, Zhang LY, Brodowsky ID, Oliw EH (1994). "Sequential oxygenation of linoleic acid in the fungus Gaeumannomyces graminis: stereochemistry of dioxygenase and hydroperoxide isomerase reactions". Arch. Biochem. Biophys. 309 (1): 77–80. doi:10.1006/abbi.1994.1087. PMID 8117115.
- Hörnsten, L; Su, C; Osbourn, AE; Garosi, P; Hellman, U; Wernstedt, C; Oliw, EH (1999). "Cloning of linoleate diol synthase reveals homology with prostaglandin H synthases". J. Biol. Chem. 274 (40): 28219–24. doi:10.1074/jbc.274.40.28219. PMID 10497176.
- Oliw EH, Su C, Skogstrom T, Benthin G (1998). "Analysis of novel hydroperoxides and other metabolites of oleic, linoleic, and linolenic acids by liquid chromatography-mass spectrometry with ion trap MSn". Lipids. 33 (9): 843–52. doi:10.1007/s11745-998-0280-0. PMID 9778131.
- Su C, Oliw EH (1996). "Purification and characterization of linoleate 8-dioxygenase from the fungus Gaeumannomyces graminis as a novel hemoprotein". J. Biol. Chem. 271 (24): 14112–8. doi:10.1074/jbc.271.24.14112. PMID 8662736.
- Su C, Sahlin M, Oliw EH (1998). "A protein radical and ferryl intermediates are generated by linoleate diol synthase, a ferric hemeprotein with dioxygenase and hydroperoxide isomerase activities". J. Biol. Chem. 273 (33): 20744–51. doi:10.1074/jbc.273.33.20744. PMID 9694817.
