双基因级改造工程加速了Corynebacterium glutamicum的基因组演变
Qing Wang1,2, Jie Zhang1,2, Zhe Zhao1,2
1The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China.
Nucleic acids research
|July 5, 2024
概括
研究人员开发了一种新工具,oMut-Cgts,以增加Corynebacterium glutamicum的突变率. 这种进化工程方法增强了基因修饰,以更快地发展菌株和生物应用.
科学领域:
- 微生物学 微生物学
- 合成生物学 合成生物学
- 基因工程是一种基因工程.
背景情况:
- 高自发突变率对于发现新的表型和理解基因-表型关系至关重要.
- 突变频率的增加是微生物菌株开发和遗传探索的关键挑战.
研究的目的:
- 开发一种实用且可控制的进化工具 (oMut-Cgts) 针对Corynebacterium glutamicum.
- 通过双重遗传水平的修改,显著增加突变率.
主要方法:
- 工程RNA聚合酶α子单元和DNA酶Cgl0854作为cytidine deaminase (pmCDA1) 的.
- 在转录和复制过程中,pmCDA1定位在短暂的单链DNA (ssDNA) 区域.
- 组合和优化双重遗传水平的修改.
主要成果:
- 在突变率上实现了1.02 × 10^4倍的增加.
- 在全基因组中证明了统一和高效的C:G→T:A过渡.
- 成功进化了Corynebacterium glutamicum,提高了对压力 (酸性,氧化,乙醇) 的耐受性.
结论:
- 这种oMut-Cgts工具能够在Corynebacterium glutamicum中实现快速的基因组进化和表型增强.
- 这种方法对多维生物工程有效,包括基因功能挖掘和蛋白质进化.
- 该策略可能适用于所有 prokaryotic 细胞,用于快速基因组进化.
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