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In enzymology, a linoleate 11-lipoxygenase (EC 1.13.11.45) is an enzyme that catalyzes the chemical reaction

linoleate + O₂ ${\displaystyle \rightleftharpoons }$ (9Z,12Z)-(11S)-11-hydroperoxyoctadeca-9,12-dienoate

Thus, the two substrates of this enzyme are linoleate and O₂, whereas its product is (9Z,12Z)-(11S)-11-hydroperoxyoctadeca-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 11S-oxidoreductase. This enzyme is also called linoleate dioxygenase, manganese lipoxygenase. This enzyme participates in linoleic acid metabolism.

References

• Hamberg M, Su C, Oliw E (1998). "Manganese lipoxygenase. Discovery of a bis-allylic hydroperoxide as product and intermediate in a lipoxygenase reaction". J. Biol. Chem. 273 (21): 13080–8. doi:10.1074/jbc.273.21.13080. PMID 9582346.
• 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 (1998). "Manganese lipoxygenase. Purification and characterization". J. Biol. Chem. 273 (21): 13072–9. doi:10.1074/jbc.273.21.13072. PMID 9582345.

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