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为了高重力乙醇生产和有针对性的新陈代谢,设计了S. cerevisiae结构

Peizhou Yang¹, Jiaqi Feng², Jianchao Chen²

¹School of Food and Biological Engineering, Anhui Province Key Laboratory of Agricultural Products Modern Processing, Hefei University of Technology, Feicui Road 420, Shushan District, Hefei, 230601, China. yangpeizhou@hfut.edu.cn.

Applied microbiology and biotechnology

|March 19, 2025

概括

工程酵母,S. cerevisiae GFADENA,是使用CRISPR-Cas9基因编辑创建的,用于增强生物乙醇生产. 这种菌株在高重力发酵下获得高产量,表现出更好的耐糖性和高效的乙醇转化.

科学领域:

生物技术和生物工程生物技术和生物工程
微生物发酵微生物发酵
合成生物学合成生物学

背景情况:

高重力发酵对于高效的生物乙醇生产至关重要.
提高了耐糖性和乙醇产量的酵母菌株的需求很高.
基因工程为提高酵母发酵能力提供了一条途径.

研究的目的:

为了设计一种新的酵母菌株,S. cerevisiae GFADENA,以提高高重力发酵性能.
为了研究背后的分子机制,改善了糖耐受性和乙醇产量.
在工业条件下评估工程菌株的生物乙醇生产潜力.

主要方法:

利用聚类正规间隔短Palindromic重复Cas9 (CRISPR-Cas9) 技术进行向基因淘汰.
通过删除七个特定基因 (GPD2,FPS1,ADH2,DLD3,ERG5,NTH1,AMS1) 来构建工程菌株S.cerevisiae GFADENA.
使用糖糖进行高重力发酵,并与玉米糖同时进行糖化和发酵 (SSF).
进行了针对性的代谢组学,以分析代谢途径的改变.

主要成果:

在高重力发酵下,S. cerevisiae GFADENA从400g/L的糖中产生了135g/L的乙醇,比野生类型增加了17%.
使用SSF与400g/L玉米糖实现了145g/L乙醇产量,糖-乙醇转化率为41.1%.
代谢分析显示了能量代谢的显著变化,特别是α-甲酸的上调和果糖-1,6-双酸的下调.

结论:

生物工程S. cerevisiae GFADENA菌株在高重力发酵和SSF过程中表现出卓越的性能.
基因缺失显著影响能量代谢,有助于增强糖糖耐受性和乙醇生产.
本研究提出了一种有效的生物工程策略,以改善基于酵母的生物乙醇生产.

关键词:

这种植物是Saccharomyces cerevisiae.通过CRISPR-Cas9方法来解决问题.乙醇生产乙醇生产高重力发酵高重力发酵有针对性的代谢组学.

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