Reference: Asano T, et al. (1999)
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Abstract
Sake yeast strains were improved so as to produce larger amounts of isoamyl acetate than the parental strain by isolating econazole-resistant mutants. Econazole, an imidazole antimycotic, directly interacts with unsaturated fatty acids in the yeast cell membrane, where it also inhibits the synthesis of ergosterol and decreases the ratio of unsaturated to saturated fatty acids. In contrast, alcohol acetyltransferase (AATase), which catalyzes the synthesis of isoamyl acetate, is inhibited by unsaturated fatty acids. Fifty econazole-resistant mutants were isolated from a sake yeast, Kyokai no. 701, several of which produced approximately 1.4 to 2.4 times more isoamyl acetate and an almost equal amount of isoamyl alcohol compared with the parental strain. The AATase activities of the mutants in koji extract were 1.2 to 1.4 times higher, and the unsaturated to saturated fatty acid ratios were lower, than in the parental strain.
- Reference Type
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Journal Article
- Authors
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Asano T,
Inoue T,
Kurose N,
Hiraoka N,
Kawakita S
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