开发一种前修改策略,以克服限制-修改障碍,并在乳糖菌中增强基因工程,用于尼生物合成
Chen Chen1,2,3, Yue Zhang1,2,3, Ruiqi Chen1,2,3
1School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China.
International journal of molecular sciences
|March 13, 2025
概括
一个新的前修改策略 (PMS) 克服了乳球菌的限制-修改障碍,显著提高了尼生物合成. 这种方法提高了工业应用的基因工程效率.
科学领域:
- 微生物学 微生物学
- 基因工程是一种基因工程.
- 生物技术是生物技术.
背景情况:
- 乳糖杆菌中的限制修饰 (RM) 系统阻碍了基因工程,限制了Nisin的生产.
- 低转化效率阻碍了基因工程在非模型L. lactis菌株中的应用.
研究的目的:
- 制定一项战略,以克服L. lactis.中的RM障碍.
- 通过改进的基因工程技术来增强尼辛生物合成.
主要方法:
- 实施了使用工程化大肠杆菌菌株进行L. lactis甲基化的前修改策略 (PMS).
- 优化了等离子体输送系统,包括滚动圆放大 (RCA).
- 在L. lactis. 中引入并分析了完整的Nisin生物合成基因集群.
主要成果:
- 使用PMS实现了显著提高的转换效率 (~10^3到10^4转换剂/μg DNA) .
- 成功引入了大型Nisin基因集群,并分析了基因表达调节.
- 通过食批发发酵,通过食批发发酵达到最大的Nisin标位为11,052.9 IU/mL.
结论:
- PMS提供了一种多功能且高效的方法,用于逃避L. lactis.中的RM障碍.
- 这一策略大大增强了Nisin生物合成,并促进了基因修饰.
- 铺平了L. lactis中先进的代谢工程的道路,用于工业化Nisin生产.
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