通过代谢工程和发酵优化策略,在大肠杆菌中有效地生产酸
Weibin Wu1, Maosen Chen2, Chenxi Li2
1Fujian Vocational College of Bioengineering, Fuzhou, China.
Frontiers in microbiology
|September 9, 2024
概括
在大肠杆菌中代谢工程和发酵优化使得高水平的酸 (PhLA) 生产成为可能. 这一进步为PhLA,一种有价值的有机酸的工业应用铺平了道路.
科学领域:
- 生物技术是生物技术.
- 代谢工程是代谢工程.
- 工业微生物学 工业微生物学
背景情况:
- 乳酸 (PhLA) 是一种有价值的有机酸,具有作为生物防腐剂,聚合物单体和制药前体的应用.
- 对PhLA的高效和可扩展的生产方法对于其工业利用至关重要.
- 目前的生产方法可能会面临产量和成本效益的限制.
研究的目的:
- 开发一种代谢工程化的大肠杆菌菌株,用于高水平的酸 (PhLA) 生产.
- 优化发酵策略以最大限度地提高PhLA产量和生产力.
- 建立一个基础,以工业规模生产PhLA.
主要方法:
- 在大肠杆菌CGSC4510.10中确定了PhLA生物合成途径.
- 破坏了 fenilalanine 和 tryptophan 的生物合成途径,以重定向碳流向 PhLA.
- 在酸合成中的关键酶的基因拷贝数量增加.
- 增加了前体的可用性 (基酸和红4-酸盐).
- 优化溶解氧反料和发酵条件.
主要成果:
- 制造了一种基因工程菌株,MG-P10,能够在摇瓶中生产1.42g/L的PhLA.
- 通过优化的发酵策略,在6L发酵器中获得了52.89g/L的PhLA产量.
- 与以前的方法相比,PhLA生产显著改善.
结论:
- 代谢工程和发酵优化策略对于大肠杆菌中高水平的PhLA生产是有效的.
- 开发的菌株和工艺为工业PhLA制造提供了一个强大的平台.
- 这项研究为具有成本效益和可扩展的PhLA生物生产奠定了基础.
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