Transport of Pyruvate in Saccharomyces cerevisiae and Cloning of the Gene Encoded Pyruvate Permease
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概要
- 論文の詳細を見る
Pyruvate uptake in Saccharomyces cerevisiae was not observed at 0℃ and was prevented by the uncoupler carbonyl cyanide m-chlorophenylhydrazone (CCCP). The initial uptake rate of S. cerevisiae kyokai No. 901 was maximum at pH 6 and K_m=4.1mM. It seemed that lactate inhibited the pyruvate uptake competitively from the results of the Lineweaver-Burk plots. The inhibition constant (K_i) in the presence of 3mM lactate was 1.6 mM. The pyruvate uptake was inhibited by D-glucose and deoxyglucose, but not by L-glucose, acetate or ethanol. Mutants of laboratory strain No. 5022 ((a) his (2,6), ura3) deficient in pyruvate uptake were isolated from fluoropyruvate resistant mutants. Transformation of the mutant with a yeast genomic library allowed the isolation of the gene JEN1 (YKL217w), which restored pyruvate uptake. Disruption of JEN1 abolished the uptake of pyruvate and gained the resistance against fluoropyruvate. The results indicate that no other monocarboxylate permease is able to efficiently transport pyruvate in S. cerevisiae.
- 社団法人日本農芸化学会の論文
- 2000-05-23
著者
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Fujii Tsutomu
National Research Institute of Brewing
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Iefuji Haruyuki
National Research Institute of Brewing
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Iefuji Haruyuki
National Res. Inst. Of Brewing
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AKITA Osamu
National Research Institute of Brewing (NRIB)
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NISHIMORI CHIHARU
National Research Institute of Brewing
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Akita Osamu
National Research Institute Of Brewing
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SHIMAMOTO Toshihiro
National Research Institute of Brewing
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Nishimori C
National Res. Inst. Brewing Hiroshima Jpn
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