NDLI: Growth and ethanol fermentation ability on hexose and pentose sugars and glucose effect under various conditions in thermotolerant yeast Kluyveromyces marxianus

Content Provider	Springer Nature Link
Author	Rodrussamee, Nadchak Lertwattanasakul, ppon Hirata, Katsushi Limtong, Savitree Kosaka, Tomoyuki Yamada, Mamoru
Copyright Year	2011
Abstract	Ethanol fermentation ability of the thermotolerant yeast Kluyveromyces marxianus, which is able to utilize various sugars including glucose, mannose, galactose, xylose, and arabinose, was examined under shaking and static conditions at high temperatures. The yeast was found to produce ethanol from all of these sugars except for arabinose under a shaking condition but only from hexose sugars under a static condition. Growth and sugar utilization rate under a static condition were slower than those under a shaking condition, but maximum ethanol yield was slightly higher. Even at 40°C, a level of ethanol production similar to that at 30°C was observed except for galactose under a static condition. Glucose repression on utilization of other sugars was observed, and it was more evident at elevated temperatures. Consistent results were obtained by the addition of 2-deoxyglucose. The glucose effect was further examined at a transcription level, and it was found that KmGAL1 for galactokinase and KmXYL1 for xylose reductase for galactose and xylose/arabinose utilization, respectively, were repressed by glucose at low and high temperatures, but KmHXK2 for hexokinase was not repressed. We discuss the possible mechanism of glucose repression and the potential for utilization of K. marxianus in high-temperature fermentation with mixed sugars containing glucose.
Starting Page	1573
Ending Page	1586
Page Count	14
File Format	PDF
ISSN	01757598
Journal	Applied Microbiology and Biotechnology
Volume Number	90
Issue Number	4
e-ISSN	14320614
Language	English
Publisher	Springer-Verlag
Publisher Date	2011-04-08
Publisher Place	Berlin, Heidelberg
Access Restriction	Subscribed
Subject Keyword	Kluyveromyces marxianus Ethanol production Glucose effect High-temperature fermentation Biotechnology Microbial Genetics and Genomics Microbiology
Content Type	Text
Resource Type	Article
Subject	Medicine Applied Microbiology and Biotechnology Biotechnology

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