系统地开发一个高效的细胞工厂,用于生产5 - 氨基烯酸
Houming Zhou1, Chengyu Zhang1, Zilong Li2
1State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, 200237, China; State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China.
Trends in biotechnology
|August 7, 2024
概括
这项研究设计了大肠杆菌以实现具有成本效益的5 - 氨基氨酸 (5-ALA) 生物制造. 优化的菌株和动态控制系统实现了创纪录的63.39g/l标位,使经济可行性.
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:
- 5 - 氨基氨酸 (5-ALA) 在农业,畜牧业和医药领域具有多样化的应用.
- 目前的5-ALA生物制造工艺缺乏经济可行性.
- 对于5-ALA生产的成本效益高的方法对于其广泛使用至关重要.
研究的目的:
- 开发一种经济上可行的5-ALA.生物制造工艺.
- 通过系统的代谢工程来提高5-ALA生产标位.
- 为了克服氧化还原平衡和碳流量的局限性,提高产量.
主要方法:
- 差异性进化被用于识别高性能5-ALA合成酶 (ALAS).
- 基因组规模建模指导了埃舍里奇亚大肠杆菌中四个关键标的修改.
- 开发了一个动态控制系统,以平衡氧化还原状态和碳流量.
- 人工氧化还原稳定和辅助因子养在转录和养水平上得到了优化.
主要成果:
- 在一个5L生物反应器中,工程化埃舍里希亚大肠杆菌在5L生物反应器中达到21.82g/l的5-ALA标位.
- 一个动态控制系统成功地平衡了氧化还原状态和碳流量.
- 最终优化的工艺达到63.39g/l的记录标位,为5-ALA生物制造.
结论:
- 系统的代谢工程和动态控制使成本高效的5-ALA生物制造成为可能.
- 开发的工艺证明了为5-ALA生产记录的最高性能.
- 这一进步促进了5-ALA的经济可行性和更广泛的应用.
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