通过代谢和发酵工程,通过大肠杆菌 (Escherichia coli) 来从基纤维素化物中产生高埃克托因
Yifan Feng1, Wenlong Xiao1, Xinyi Li1
1State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211816, P. R. China.
ACS synthetic biology
|February 11, 2025
概括
这项研究利用大肠杆菌 (Escherichia coli) 来增强生殖素的生产,通过使用可再生资源 (如小麦) 来实现高标位,以实现具有成本效益的工业应用.
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:
- 埃克托因是类生物体的兼容溶液,由于其补水和保护性质,具有显著的化品和制药潜力.
- 有效和成本效益的生产方法对于工业规模的生菜的应用至关重要.
研究的目的:
- 为了设计一种微生物宿主,以生产高产的ectoine.
- 为了优化发酵过程,以实现经济高效的ectoine合成.
- 探索使用可再生资源来生产生.
主要方法:
- 组装了从Halomonas venusta到Escherichia coli的生殖素合成基因集群 (ectABC).
- 淘汰了PTS中的crr基因以重定向代谢流量,并过度表达了LysC (EclysC*) 的反不敏感突变.
- 优化发酵介质和料批量策略,包括使用来自小麦的纤维素酸化物.
主要成果:
- 经过基因改造的大肠杆菌在基因改造后产生了2.51g/L的ectoine,在中等优化后增加到4.55g/L.
- 在5.0升生物反应器中进行料批发发酵,产生了115.15g/L的ectoine.
- 使用小麦水解剂,最终度为134.08g/L,产量为0.33g/g糖,生产率为3.7g/L/h.
结论:
- 代谢工程和过程优化显著增强了大肠杆菌中的ectoine生产.
- 林氏纤维素酸解液的使用为工业性乙烯酸制造提供了一种具有成本效益的途径.
- 这项研究提出了一种可持续的,大规模的从可再生原料中生产ectoine的可行战略.
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