Construction of thermo-tolerant yeast based on an artificial protein quality control system (APQC) to improve the production of bio-ethanol
Construction of thermo-tolerant yeast based on an artificial protein quality control system (APQC) to improve the production of bio-ethanol
复制标题
基于人工蛋白质质量控制系统(APQC)构建耐热酵母以提高生物乙醇的产量
DOI:
10.1016/j.ces.2017.12.009
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发表时间:
2018-02
影响因子:
4.7
通讯作者:
Chun Li
中科院分区:
文献类型:
--
作者:
Ke Xu;Liping Yu;Wenxin Bai;Bing Xiao;Yueqin Liu;Bo Lv;Jun Li;Chun Li
A major challenge for the production of bio-ethanol is to develop yeast that can sustain growth under high temperature. Here, we show the application of an artificial protein quality control (APQC) system to an industrialSaccharomyces cerevisiaestrain for improving thermo-tolerance, a key trait for a bio-ethanol fermentation program. All engineered strains exhibited a significantly higher growth rate and cell viability at 37 °C, which conferred increased thermo-tolerance and more efficient glucose conversion to ethanol. Furthermore, the analysis of ubiquitination and the enzyme activities of pyruvate kinase (PK) and malate dehydrogenase (MDH) indicated strengthened protein quality, implying that proteostasis had been effectively improved at higher temperature. Industrial material fermentation results from yeast-RSP5-UBC4 (combined expression of ubiquitin conjugated enzyme E2 and ubiquitin ligase E3) showed a 2.4% increase in ethanol production. All these findings prove that APQC is suitable for improving yeast resistance to high temperature during industrial bio-ethanol production.
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影响因子:
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DOI:
10.1126/science.1179689
发表时间:
2010-02-19
期刊:
Science (New York, N.Y.)
影响因子:
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