Formation of n-Alkane-2-Ones and n-Alkane-2-Ols from Triglycerides by a Black Yeast, Aureobasidium

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概要

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• The n-alkane-forming-strains were screened from soil by checking n-alkane-2-one(2-one)formation from both synthetic anc natural triglycerides. All of the 2-one-accumulative strains were filamentous fungi with the exception of a black yeast(SM-25). The yeast(SM-25)was identified to be a strains which belongs to the genus Aureobasidium, and had the following interesting activity : extracellular accumulation of n-undecane-2-one(C_<11>-2-one)and n-undecane-2-ol(C_<11>-2-ol)in significant yields with consumption of lauric acid(C_<12 : 0>), a major component, in palm-kernel oil. The maximal accumulations of 2-ones and 2-ols were achieved in 4-d and 6-d cultures, respectively, with a subsequent decrease in their volume. The time-shift in the maximal accumulation suggests that 2-one is a precursor for 2-ol. When synthetic triglycerides were used as substrate, the yeast indicated a specific accumulation of n-pentane-2-one(C_5-2-one)in a high yield and of n-pentane-2-ol(C_5-2-ol)in a low yield with consumption of tricaproin(caproic triglyceride). In tricaprylin-, tricaprin- and trilaurin- basal media, accumulation of 2-one and 2-ol was small or undetectable. Although there is a clear discrepancy between molecular species of 2-ones and 2-ols formed from palm-kernel oil and synthetic triglycerides, we don't have a clear explanation for this yet. In order to clarify the metabolic pathyaw in the yeast for n-alkane-2-one or n-alkane-2-ol formation from fatty acids, the metabolites from 2-ones and 2-ols were characterized. Subsequently, the occurrence of interconversion between n-alkane-2-one and n-alkane-2-ol by the yeast cells was demonstrated. This observation did not lead us to a definite answer to the question : which is the upstream intermediate in the fatty-acid-metabolic pathway, 2-one or 2-ol?

• 社団法人日本生物工学会の論文
• 1991-02-25

著者

• Yagi Takashi

  Research And Development Center Showa Sangyo Co. Ltd.

• HATANO TAKUSHI

  Department of Bioengineering, Faculty of Engineering, Fukuyama University

• FUKUI SAKUZO

  Department of Bioengineering, Faculty of Engineering, Fukuyama University

• Yagi T

  Showa Sangyo Co. Ltd. Funabashi Jpn

• Fukui F

  Showa Sangyo Co. Ltd. Ibaraki Jpn

• Fukui Fumio

  Fermentation Research Laboratories Sankyo Co. Ltd.

• HATANO AKIKO

  Research and Development Center, Showa Sangyo Co. Ltd.,

• FUKUI FUMIO

  R & D Center, Showa Sangyo Co., Ltd.,

• HATANO AKIKO

  R & D Center, Showa Sangyo Co., Ltd.,

• YAGI TAKAHSI

  R & D Center, Showa Sangyo Co., Ltd.,

• KAWAGUCHI MIEKO

  Department of Bioengineering, Faculty of Engineering, Fkuyama University

• NAKANISHI TAISUKE

  R & D Center, Showa Sangyo Co., Ltd.,

• Hatano Akiko

  Research And Development Center Showa Sangyo Co. Ltd.

• Nakanishi Taisuke

  Department Of Agricultural Chemistry Faculty Of Agriculture Kinki University

• Fukui Sakuzo

  Department Of Bioengineering Faculty Of Engineering Fukuyama University

• Hatano Takushi

  Department Of Bioengineering Faculty Of Engineering Fukuyama University

• Kawaguchi Mieko

  Department Of Bioengineering Faculty Of Engineering Fkuyama University

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