防止使用工程制造的可诱导葡萄糖的遗传电路来避免生产逃逸
Leonardo F Tavares1, Nathan V Ribeiro1, Vitória F B Zocca1
1Universidade Estadual Paulista (UNESP), School of Pharmaceutical Sciences, Department of Bioprocess Engineering and Biotechnology, Araraquara, 14800-903, Brazil.
ACS synthetic biology
|September 29, 2023
概括
在Bacillus subtilis中设计了一个可诱导葡萄糖的遗传电路,以平衡微生物的生产和细胞的适应性. 这种电路保持了生产能力,在引入葡萄糖后可以提高生物化学产量.
科学领域:
- 合成生物学 合成生物学
- 代谢工程是代谢工程.
- 微生物生物技术 微生物生物技术
背景情况:
- 在高负载生化生产过程中保持细胞健康对于工业应用至关重要.
- 代谢途径的不平衡会降低微生物菌株的效率和生产力.
- 工程发起剂和遗传电路提供精确控制基因表达,以减轻细胞负担.
研究的目的:
- 在Bacillus subtilis中设计出一个强大的,可诱导葡萄糖的基因电路.
- 为了利用碳催化剂抑制系统来控制基因表达.
- 提高微生物细胞适应性和生产效率,用于工业生化合成.
主要方法:
- 设计和实施一种可诱导葡萄糖的基因电路,利用Bacillus subtilis的碳催化剂抑制.
- 在压制性和持续诱导条件下进行连续种植,延长几代人.
- 通过比较培养策略评估生产能力和细胞适应性变化.
主要成果:
- 工程电路使得在葡萄糖可用时可以在生产状态中切换,证明了弹性.
- 在压制性条件下的连续种植保留了生产能力,导致激活34倍,诱导后产量增加70%.
- 67代的连续诱导导致了62%的生产损失和增长率的增加,突出了受控诱导的好处.
结论:
- 工程制造的可诱导葡萄糖的基因电路是路径独立的,并且广泛适用于微生物生产.
- 这个系统有效地平衡了细胞生长和生产,为工业生化合成提供了具有成本效益的解决方案.
- 通过这种电路进行受控的诱导,可以在长时间的培养期内增强和保持微生物的生产能力.
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