1. Improvement of acetic acid tolerance and fermentation performance of Saccharomyces cerevisiae by disruption of the FPS1 aquaglyceroporin gene
- Author
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Xiu-Ying Liu, Xuena Guo, Xiuping He, Jun-Guo Zhang, Ying Lu, and Borun Zhang
- Subjects
Saccharomyces cerevisiae Proteins ,Saccharomyces cerevisiae ,Bioengineering ,Ethanol fermentation ,Biology ,Applied Microbiology and Biotechnology ,Gene Knockout Techniques ,Industrial Microbiology ,Acetic acid ,chemistry.chemical_compound ,Ethanol fuel ,Acetic Acid ,Strain (chemistry) ,Membrane Proteins ,Drug Tolerance ,General Medicine ,Hydrogen-Ion Concentration ,Industrial microbiology ,biology.organism_classification ,Yeast ,Culture Media ,Biochemistry ,chemistry ,Fermentation ,Aquaglyceroporins ,Biotechnology - Abstract
The FPS1 gene coding for the Fps1p aquaglyceroporin protein of an industrial strain of Saccharomyces cerevisiae was disrupted by inserting CUP1 gene. Wild-type strain, CE25, could only grow on YPD medium containing less than 0.45% (v/v) acetic acid, while recombinant strain T12 with FPS1 disruption could grow on YPD medium with 0.6% (v/v) acetic acid. Under 0.4% (v/v) acetic acid stress (pH 4.26), ethanol production and cell growth rates of T12 were 1.7 ± 0.1 and 0.061 ± 0.003 g/l h, while those of CE25 were 1.2 ± 0.1 and 0.048 ± 0.003 g/l h, respectively. FPS1 gene disruption in an industrial ethanologenic yeast thus increases cell growth and ethanol yield under acetic acid stress, which suggests the potential utility of FPS1 gene disruption for bioethanol production from renewable resources such as lignocelluloses.
- Published
- 2010
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