title: High expression of unsaturated fatty acid synthesis gene OLE 1 in sake yeasts.
abstract: Gene Filters and Northern blot analysis revealed that the sake yeast strain Kyokai no. 7 (K 7) showed a higher expression level of OLE 1, which encodes a Delta-9 fatty acid desaturase gene, compared with the laboratory yeast strain X 2180-1A. Other sake yeasts also showed a high expression level of OLE 1. Unsaturated fatty acid concentrations in strain K 7 are higher than that in strain X 2180-1A, suggesting that the higher expression level of OLE 1 in sake yeasts increases the unsaturated fatty acid content in the cell membrane. Experiments using OLE 1 promoter:lacZ fusion reporter genes revealed that both the cis element of the OLE 1 promoter and trans factors are involved in the increased expression of OLE 1 in sake yeasts.
authors.affiliation: General Research Laboratory of Kiku-Masamune Sake Brewing Co. Ltd., 1-8-6 Uozaki-nishimachi, Higasinada-ku, Kobe 658-0026, Japan. ta-yamada@kikumasamane.co.jp
authors.forename: Tasuku
authors.initials: T
authors.lastname: Yamada
authors.forename: Hitoshi
authors.initials: H
authors.lastname: Shimoi
authors.forename: Kiyoshi
authors.initials: K
authors.lastname: Ito
mesh_terms: D044943:Fatty Acid Desaturases / Q000235:genetics* / Q000378:metabolism*; D005231:Fatty Acids, Unsaturated / Q000096:biosynthesis*; D020869:Gene Expression Profiling / Q000379:methods; D015966:Gene Expression Regulation, Fungal / Q000502:physiology; D020411:Oligonucleotide Array Sequence Analysis / Q000379:methods*; D011401:Promoter Regions, Genetic / Q000235:genetics; D012441:Saccharomyces cerevisiae / Q000235:genetics* / Q000378:metabolism*; D013230:Stearoyl-CoA Desaturase; D014920:Wine / Q000382:microbiology*
chemical_list: D005231:Fatty Acids, Unsaturated; D044943:Fatty Acid Desaturases; D013230:Stearoyl-CoA Desaturase; C029627:delta-9 fatty acid desaturase