文献类型：期刊文献

英文题名：Modification of the second PEP4-allele facilitates an industrial Saccharomyces cerevisiae to tolerate tartaric acid stress

作者：Zhang, Hongbo[1];Yang, Xiaomei[1];Shen, Chi[1];Sun, Jianqiu[1];Lu, Yuhang[1];Hu, Wanting[1];Yao, Hongfei[1];Zhao, Wenhao[1]

机构：[1]Shaoxing Univ, Coll Life & Environm Sci, 900 Chengnandadao Rd, Shaoxing 312000, Peoples R China

年份：2023

卷号：174

期号：8

外文期刊名：RESEARCH IN MICROBIOLOGY

收录：SCI-EXPANDED(收录号：WOS:001127647500001)、、Scopus(收录号：2-s2.0-85172780254)、WOS

基金：Funding This work was supported by the National Natural Science Foundation of China [No.31301551] .

语种：英文

外文关键词：Saccharomyces cerevisiae; PEP4-allele; Tartaric acid stress; Cellular tolerance

外文摘要：The practical significance of constructing robust industrial production strains against organic acid stress lies not only in improving fermentation efficiency but also in reducing manufacturing costs. In a previous study, we constructed an industrial Saccharomyces cerevisiae strain by modifying another PEP4-allele of a mutant that already had one PEP4-allele disrupted. This modification enhanced cellular tolerance to citric acid stress during growth. Unlike citric acid, which S. cerevisiae can consume, tartaric acid is often added to grape must during winemaking to increase total acidity and is not metabolizable. The results of the present study indicate that the modification of the second PEP4-allele improves the cellular tolerance of the strain with one PEP4-allele disrupted against tartaric acid stress during growth and contributes to maintaining intracellular pH homeostasis in cells subjected to tartaric acid stress. Moreover, under tar-taric acid stress, a significant improvement in glucose-ethanol conversion performance, conferred by the modification of the second PEP4-allele, was observed. This study not only broadens our understanding of the role of the PEP4-allele in cellular regulation but also provides a prospective approach to reducing the concentration of sulfur dioxide used in winemaking.(c) 2023 Institut Pasteur. Published by Elsevier Masson SAS. All rights reserved.