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强大的Saccharomyces cerevisiae通过合理的代谢工程从未经过排毒的蒸汽爆炸的玉米炉水解剂有效生产乙醇

Yilu Wu¹, Di Cai², Changsheng Su²

¹College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, PR China; National Energy R&D Center for Biorefinery, Beijing University of Chemical Technology, Beijing 100029, PR China.

Bioresource technology

|April 30, 2025

概括

这项研究通过改善酵母菌的化和抑制剂耐受性来增强从红纤维素材料的生物乙醇生产. 定制的酵母菌株在没有营养补充剂的情况下从玉米炉水解剂获得了高产量.

科学领域:

生物技术是生物技术.
代谢工程是代谢工程.
合成生物学合成生物学

背景情况:

使用Saccharomyces cerevisiae的林氏纤维素生物乙醇生产面临由于低效的树脂和抑制化合物的存在而面临的挑战.
开发强大的酵母菌株对于具有成本效益和大规模的基纤维素生物燃料生产至关重要.

研究的目的:

为了设计一种Saccharomyces cerevisiae菌株,以提高利用西洛斯和耐受林氏纤维素解酸盐中存在的抑制剂的能力.
为了提高生物乙醇生产效率,从未经过排毒的玉米炉水解剂.

主要方法:

在父母酵母菌株中,西洛异构酶通路的异构表达.
适应性实验室进化以增强抑制剂耐受性和氧化糖利用率.
减少谷氨和NADPH合成系统的工程,以减轻反应性氧物种 (ROS).

主要成果:

经过工程改造的Saccharomyces cerevisiae菌株从未经过排毒的蒸汽爆炸玉米炉水解盐 (SECSH) 显著改善了生物乙醇生产.
达到70.52±0.38g/L的高生物乙醇标位,产量为0.450g/g的总糖.
定制品种的表现很好,不需要补充营养.

结论:

基因改造和适应性实验室进化的联合策略有效地改善了S. cerevisiae的树脂同化和抑制剂耐受性.
这种方法为大型工业生产基纤维素生物乙醇提供了可行的基础.
这种工程菌株为克服从非食品生物质生产生物燃料的关键瓶提供了有希望的解决方案.

关键词:

适应性实验室进化的演变.生物乙醇生物乙醇谷氨抗氧化系统的抗氧化系统.葡萄糖纤维素水解酸.这种植物是Saccharomyces cerevisiae.

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