设计甲基酸路径并使用临时促进剂来增强Rhodobacter sphaeroides HY01中的烯生产
Xinwei He1, Dan Wang1, Jing Liu1
1State Key Laboratory of Bioreactor Engineering and School of Biotechnology, East China University of Science and Technology, Shanghai 200237, China.
Journal of agricultural and food chemistry
|December 3, 2024
概括
Rhodobacter sphaeroides HY01可以被设计为高产量的化物生产. 通过使用时间促进剂优化甲基二酸盐路径,显著提升了莱科生物合成,达到创纪录的水平.
科学领域:
- 微生物生物技术 微生物生物技术
- 代谢工程是代谢工程.
- 合成生物学 合成生物学
背景情况:
- Rhodobacter sphaeroides HY01是一种高产的菌株,用于生产辅酶Q10 (Q10).
- 过度生产Q10会耗尽异烯前体,限制其他类生物合成.
- 这种菌株具有多样化类产生的潜力,因此需要优化路径.
研究的目的:
- 为了改造 Rhodobacter sphaeroides HY01 增强产生的特类烯.
- 调查甲基酸 (MEP) 路径重构对柳科产量的影响.
- 为微生物类生物合成建立一个坚固的底盘.
主要方法:
- MEP路径的基因工程,包括基因过度表达 (crtE,crtI4) 和引入.
- 微调 PrrAB 两个组件系统以调节 MEP 路径流量.
- 转录组分析以识别和表征本地时促进体.
- 控制基因表达,使用已识别的原生促进剂进行烯生物合成.
主要成果:
- 最初的MEP路径重构实现了126.1毫克/升的柳科.
- 关键MEP通路基因的过度表达导致了菌株降解和产量减少.
- 工程设计PrrAB系统增加了柳科的产量,达到154.9 mg/L.
- 使用时促进剂进行MEP通路基因控制,结果创下了283.1 mg/L的烯记录.
结论:
- Rhodobacter sphaeroides HY01 作为类生物合成的多功能底盘.
- 代谢工程策略,特别是时间促进器利用,对于优化产量至关重要.
- 微调调控系统和基因表达时间提高了微生物的生产能力.
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