通过出口工程和贝叶斯对介质组成的优化,在Corynebacterium glutamicum中增强了l-氨酸合成
Yifan Huang1, Yujie Gao2, Yamin Huang1
1Laboratory of Pharmaceutical Engineering, School of Life Science and Health Engineering, Jiangnan University, Wuxi, 214122, Jiangsu, China.
Synthetic and systems biotechnology
|April 28, 2025
概括
研究人员设计了一个无等离子体的细胞工厂,以高效地生产L-氨酸. 一种新的SerE突变 (E277K) 显著促进了l-胺的出口,在Corynebacterium glutamicum中达到47.77g/L的纪录标位.
科学领域:
- 代谢工程是代谢工程.
- 合成生物学 合成生物学
- 生物技术是生物技术.
背景情况:
- 氨酸是一种有价值的氨基酸,在食品,医药和化品中广泛应用.
- 目前的L-氨酸的工业生产受到低位数的限制,需要改进生产策略.
- 运输工程为增强氨基酸出口和整体生产效率提供了一个有前途的途径.
研究的目的:
- 建设一个无等离子体细胞工厂,以提高L-氨酸的生产.
- 为增加L-氨酸出口商SerE的出口能力进行设计.
- 使用先进的计算和发酵技术优化L-氨酸的生产.
主要方法:
- 研究了SerE过度表达和删除对Corynebacterium glutamicum中L-氨酸标位和细胞生长的影响.
- 采用半理性设计,生物信息学,氨酸突变和特定站点和突变生成来设计SerE.
- 利用结构分析,分子动力学模拟和贝叶斯优化来改善应变和优化过程.
主要成果:
- 过度表达SerE增加了L-氨酸标位15.1%,但细胞生长减少.
- 改造的SerE突变E277K显示出口能力提高了53.2%,L-氨酸位增加了39.6%.
- 在优化条件下,在使用C-E277K菌株的5L生物反应器中,L-氨酸标位达到47.77g/L的创纪录.
结论:
- 设计L-氨酸出口途径,特别是通过针对性的氨酸突变,对于高度生产至关重要.
- 开发的无等离子体细胞工厂和改造的SerE突变体代表了L-胺工业生产的重大进步.
- 这项研究提供了一个强大的战略,通过运输工程和优化来增强氨基酸生产.
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