从野生类型Saccharomyces cerevisiae中选高产量2-乙醇生产菌株,并优化发酵参数
Chenshuo Zhang1,2, Tingwen Fan1, Zhichun Wang3
1State Key Laboratory of Microbial Diversity and Innovative Utilization, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China.
Foods (Basel, Switzerland)
|July 29, 2025
概括
这项研究优化了Saccharomyces cerevisiae发酵,以产生2-phenylethanol (2-PE),一种香的酒精. 通过增强的发酵和现场产品回收,在工业应用中实现了6.41g/L的高产量.
科学领域:
- 生物技术和工业微生物学
- 代谢工程是代谢工程.
- 发酵科学 发酵科学
背景情况:
- 2-乙醇 (2-PE) 是一种有价值的芳香醇,在食品,制药和化品中具有应用.
- 有效和可持续的生产方法对于满足对2-PE的工业需求至关重要.
- 麦芽是一种成熟的微生物,用于工业发酵.
研究的目的:
- 隔离和识别一种高产的2-PE生产菌株的Saccharomyces cerevisiae.
- 优化发酵条件,包括介质组成和生物反应器参数,以提高2-PE生产.
- 研究在现场产品回收 (ISPR) 的应用,以提高2-PE产量和减轻细胞毒性.
主要方法:
- 隔离和识别一个产量高的2-PE生产Saccharomyces cerevisiae菌株.
- 使用单因素实验优化发酵介质成分 (碳和来源).
- 生物反应器发酵,控制pH值,注射剂比例,基质补充 (L-Phe) 和现场产品回收 (ISPR).
主要成果:
- 一种产量高的2-PE产生的Saccharomyces cerevisiae菌株被成功鉴定出来.
- 优化的发酵介质和生物反应器条件 (pH5.5,10%的注射剂,L-Phe补充) 产生了4.81g/L的2-PE.
- 通过应用ISPR技术,通过降低产品细胞毒性,最终的2-PE产量增加到6.41g/L.
结论:
- 使用Saccharomyces cerevisiae优化的发酵过程为2-PE生产提供了有效和自然的途径.
- 玉米液和酵母提取物在调节2-PE合成的基因表达方面发挥着至关重要的作用.
- 开发的战略,包括ISPR,显示了在食品,制药和化品行业的工业规模2-PE制造的巨大潜力.
相关概念视频
01:22Bioreactor Controls-III
Strain improvement is a foundational strategy in industrial microbiology aimed at maximizing microbial productivity, particularly because natural isolates typically yield commercially valuable products in very low concentrations. Although optimizing the culture medium and environmental conditions can improve yields, these adjustments are inherently limited by the organism’s genetic potential. As a result, the focus shifts toward genetic modifications to enhance biosynthetic capacity. The...
01:27Production of Alcohol
Continuous fermentation is a key strategy in industrial ethanol production, particularly when efficiency, scalability, and high yields are essential. This approach allows for uninterrupted operation and optimized resource utilization. The primary feedstock, corn starch, undergoes enzymatic hydrolysis facilitated by α-amylase and glucoamylase. These enzymes break down the starch into fermentable sugars such as glucose, which are readily assimilated by fermentative microorganisms.Fermentation...