在大肠杆菌中设计太阳酸/酸 (SFAP) 途径,用于乳酸生产
Yajing Zhang1, Tao Sun2, Linqi Liu1
1State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy, Dalian, 116023, China; University of Chinese Academy of Sciences, Beijing, 100049, China.
Metabolic engineering
|April 15, 2024
概括
工程Escherichia coli利用二氧化碳和糖生产乳酸 (LA) 通过一个新的太阳能酸/酸路径. 这种方法通过高效的碳固定和减少电力利用,提高了20%的LA产量.
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:
- 微生物的二氧化碳 (CO2) 固定成乳酸 (LA) 是可持续生物制造的关键.
- 将二氧化碳固定与糖代谢相结合,在保持碳储量和代谢兼容性方面提出了挑战.
研究的目的:
- 设计一种新的途径,以有效地将二氧化碳固定到LA中,使用共同基质.
- 通过合并二氧化碳固定与中央糖代谢来增强LA生产.
主要方法:
- 在大肠杆菌中设计和建造了一条太阳酸/酸 (SFAP) 途径.
- 采用甲酸盐氧化,为二氧化碳固定提供降解等效物.
- 基于Rubisco的集成CO2固定与葡萄糖代谢,将其转移到酸路径.
主要成果:
- 通过SFAP途径,可以将二氧化碳固定到由二氧化碳和葡萄糖生产的LA中.
- 甲酸盐氧化提供了足够的还原力来驱动二氧化碳固定和葡萄糖代谢.
- 与单独使用葡萄糖相比,在理论上提高了20%的产量.
结论:
- 开发的SFAP途径为生物生产中二氧化碳利用提供了一个有效的策略.
- 与光电化学细胞的集成为低碳生物制造提供了一个有希望的途径.
- 工程化大肠杆菌可以有效地将二氧化碳转化为像LA这样的增值产品.
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