Respiration-deficient mutants of Zymomonas mobilis show improved growth and ethanol fermentation under aerobic and high temperature conditions(MICROBIAL PHYSIOLOGY AND BIOTECHNOLOGY)
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概要
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Respiration-deficient mutant (RDM) strains of Zymomonas mobilis were isolated from antibiotic-resistant mutants. These RDM strains showed various degrees of respiratory deficiency. All RDM strains exhibited much higher ethanol fermentation capacity than the wild-type strain under aerobic conditions. The strains also gained thermotolerance and exhibited greater ethanol production at high temperature (39℃), under both non-aerobic and aerobic conditions, compared with the wild-type strain. Microarray and subsequent quantitative PCR analyses suggest that enhanced gene expression involved in the metabolism of glucose to ethanol resulted in the high ethanol production of RDM strains under aerobic growth conditions. Reduction of intracellular oxidative stress may also result in improved ethanol fermentation by RDM strains at high temperatures.
著者
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HAYASHI Takeshi
Department of Neurology, Okayama University School of Medicine
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Furukawa Kensuke
Department Of Agricultural Chemistry Faculty Of Agriculture Kyushu University
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Furuta Yoshifumi
Research Laboratory, Sanwa Shurui, Co. Ltd.
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Furukawa Kensuke
Department Of Food And Fermentation Science Faculty Of Food And Nutrition Beppu University
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Furuta Yoshifumi
Research Laboratory Sanwa Shurui Co. Ltd.
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Hayashi Takeshi
Department Of Food And Fermentation Science Faculty Of Food And Nutrition Beppu University
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Hayashi Takeshi
Department Of Computer Science And Systems Engineering Graduate School Of Engineering Kobe Universit
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