期刊
BIORESOURCE TECHNOLOGY
卷 245, 期 -, 页码 1461-1468出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2017.05.191
关键词
Saccharomyces cerevisiae; Acetic acid stress tolerance; Zinc sulfate; Ady2p; Ethanol production
资金
- National Natural Science Foundation of China [21376043, 31461143029, 5151101168]
The aim of this work was to study the effects of deleting acetate transporter gene ADY2 on growth and fermentation of Saccharomyces cerevisiae in the presence of inhibitors. Comparative transcriptome analysis revealed that three genes encoding plasma membrane carboxylic acid transporters, especially ADY2, were significantly downregulated under the zinc sulfate addition condition in the presence of acetic acid stress, and the deletion of ADY2 improved growth of S. cerevisiae under acetic acid, ethanol and hydrogen peroxide stresses. Consistently, a concomitant increase in ethanol production by 14.7% in the presence of 3.6 g/L acetic acid was observed in the ADY2 deletion mutant of S. cerevisiae BY4741. Decreased intracellular acetic acid, ROS accumulation, and plasma membrane permeability were observed in the ADY2 deletion mutant. These findings would be useful for developing robust yeast strains for efficient ethanol production. (C) 2017 Elsevier Ltd. All rights reserved.
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