Do specific linoleate 13‐lipoxygenases initiate β‐oxidation?

FEBS Letters

Wasternack, Claus¹  Kühn, Hartmut²  Feussner, Ivo¹ 

[1] Institut für Pflanzenbiochemie, Weinberg 3, D-06120 Halle, Germany;Institut für Biochemie, Universitätsklinikum Charité, Humboldt Universität Berlin, Hessische Str. 3-4, D-10115 Berlin, Germany

关键词: Cucumis sativus;    Lipid body;    Lipoxygenase;    β-Oxidation;    Oxygenated polyunsaturated fatty acid;   

DOI  :  10.1016/S0014-5793(97)00218-4

学科分类：生物化学/生物物理

来源: John Wiley & Sons Ltd.

【 摘 要 】

The germination process of oilseed plants is characterized by a mobilization of the storage lipids which constitute the major carbon source for the growing seedling. Despite the physiological importance of the lipid mobilization, the mechanism of this process is not well understood. Recently, it was found that a specific linoleate 13-lipoxygenase is induced during the stage of lipid mobilization in various oilseed plants and that this enzyme is translocated to the membranes of the lipid storage organelles, the so called lipid bodies. Lipoxygenase expression was paralleled by the occurrence of enantiospecific hydro(pero)xy polyenoic fatty acid derivatives in the storage lipids suggesting the in vivo action of the enzyme. Furthermore, it was reported that oxygenated polyenoic fatty acids, in particular as 13(S)-hydro(pero)xy-9(Z),11(E)-octadecanoic acid [13(S)-H(P)ODE], are cleaved preferentially from the storage lipids when compared with their non-oxygenated linoleate residues. These findings may suggest that 13(S)-H(P)ODE may constitute the endogenous substrate for β-oxidation during lipid mobilization of oilseed plants.

【 授权许可】

Unknown