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Protein expression analysis revealed a fine-tuned mechanism of in situ detoxification pathway for the tolerant industrial yeast Saccharomyces cerevisiae

文献类型： 外文期刊

作者： Liu, Z. Lewis 1 ; Huang, Xiaoqiu 2 ; Zhou, Qian 3 ; Xu, Jian 4 ;

作者机构： 1.USDA ARS, Bioenergy Res Unit, Natl Ctr Agr Utilizat Res, 1815 N Univ St, Peoria, IL 61604 USA

2.Iowa State Univ, Dept Comp Sci, Ames, IA 50011 USA

3.Chinese Acad Fishery Sci, Yellow Sea Fishery Res Inst, 106 Nanning Rd, Qingdao 266071, Shandong, Peoples R China

4.Chinese Acad Sci, Qingdao Inst BioEnergy & Bioproc Technol, CAS Key Lab Biofuels, Single Cell Ctr, Qingdao 266101, Shandong, Peoples R China

5.Chinese Acad Sci, Qingdao Inst BioEnergy & Bioproc Technol, Shandong Key Lab Energy Genet, Qingdao 266101, Shandong, Peoples R China

关键词： Adaptation; Industrial yeast; In situ detoxification; Protein expression; Stress tolerance

期刊名称：APPLIED MICROBIOLOGY AND BIOTECHNOLOGY （ 影响因子：4.813； 五年影响因子：4.697 ）

ISSN： 0175-7598

年卷期： 2019 年 103 卷 14 期

页码：

收录情况： SCI

摘要： Inhibitory compounds liberated from lignocellulose pretreatment are representative toxic chemicals that repress microbial growth and metabolism. A tolerant strain of the industrial yeast Saccharomyces cerevisiae is able to detoxify a major class of toxic compounds while producing ethanol. Knowledge on the yeast tolerance was mostly obtained by gene expression analysis and limited protein expression evidence is yet available underlying the yeast adaptation. Here we report a comparative protein expression profiling study on Y-50049, a tolerant strain compared with its parental industrial type strain Y-12632. We found a distinctive protein expression of glucose-6-phosphate dehydrogenase (Zwf1) in Y-50049 but not in Y-12632, in the relatively conserved glycolysis and pentose phosphate pathway (PPP) in response to a combinational challenge of 2-furaldehyde (furfural) and 5-hydroxymethyl-2-furaldehyde (HMF). A group of proteins with aldehyde reduction activity was uniquely induced expressed in Y-50049 but not in Y-12632. Such evidence allowed fine-tuning a mechanism of the renovated in situ detoxification by Y-50049. As the key protein, Zwf1 drove the glucose metabolism in favor of the oxidative branch of the PPP facilitating in situ detoxification of the toxic chemicals by Y-50049. The activated expression of Zwf1 generated the essential cofactor nicotinamide adenine dinucleotide phosphate (NADPH) enabling reduction of furfural and HMF through a group of aldehyde reduction enzymes. In return, the activate aldehyde reductions released desirable feedbacks of NADP(+) stimulating continued oxidative activity of Zwf1. Thus, a well-maintained cofactor regeneration cycle was established to restore the cofactor imbalance caused by furfural-HMF. Challenges and perspectives on adaptation of significantly differential expressions of ribosomal proteins and other unique proteins are also discussed.

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