Metabolism of ricinoleic acid into γ-decalactone: β-oxidation and long chain acyl intermediates of ricinoleic acid in the genus Sporidiobolus sp

• Published in: FEMS microbiology letters Vol. 188; no. 1; pp. 69 - 74
• Main Authors: Blin-Perrin, Caroline, Molle, Daniel, Dufosse, Laurent, Le-Quere, Jean-Luc, Viel, Christophe, Mauvais, Geneviève, Feron, Gilles
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier B.V 01.07.2000; Blackwell; Wiley-Blackwell
• Subjects: Acylation; Basidiomycota - growth & development; Basidiomycota - metabolism; Biological and medical sciences; Fundamental and applied biological sciences. Psychology; g-Decalactone; Growth, nutrition, metabolism, transports, enzymes. Molecular biology; Lactones - metabolism; Life Sciences; Microbiology; Microbiology and Parasitology; Mycology; Oxidation-Reduction; Ricinoleic acid; Ricinoleic Acids - metabolism; Sporidiobolus; Sporidiobolus genus; Yeast β-oxidation; γ-Decalactone; γ-Decalactone; Sporidiobolus genus; Ricinoleic acid; Yeast β-oxidation; Fungi; Yeast; Sporidiobolus; β Oxidation; Basidiomycetes; Lipids; Metabolism; Fatty acids; Thallophyta
• ISSN: 0378-1097; 1574-6968
• DOI: 10.1016/S0378-1097(00)00212-3

In order to study differences in γ-decalactone production in yeast, four species of Sporidiobolus were cultivated with 5% of methyl ricinoleate as the lactone substrate. In vivo studies showed different time courses of intermediates of ricinoleic acid breakdown between the four species. In vitro studies of the β-oxidation system were conducted with crude cell extracts of Sporidiobolus spp. and with ricinoleyl-CoA (RCoA) as substrate. The β-oxidation was detected by measuring acyl-CoA oxidase, 3-hydroxyacyl-CoA dehydrogenase activities, and acetyl-CoA production. The time courses of the CoA esters resulting from RCoA breakdown by crude extract of Sporidiobolus spp. permit the proposal of different metabolic models in the yeast. These models explained the differences observed during in vivo studies.