一种热稳定型I-BCRISPR-Cas系统用于正交和多重基因工程
Zhiheng Yang1,2, Zilong Li2, Bixiao Li2
1State Key Laboratory of Bioreactor Engineering, and School of Biotechnology, East China University of Science and Technology (ECUST), 200237, Shanghai, China.
Nature communications
|October 4, 2023
概括
研究人员开发了一种新的CRISPR-Cas工具,用于热友细菌中的基因工程. 该系统提高了转换效率,并使得可以为工业应用创建改进的细胞工厂.
科学领域:
- 合成生物学 合成生物学
- 微生物工程 微生物工程
- 在CRISPR-Cas系统中.
背景情况:
- 热友微生物为工业生物技术提供了巨大的潜力,但受到有限的遗传工具的阻碍.
- 有效的基因操纵对于优化这些生物体作为细胞工厂至关重要.
研究的目的:
- 确定和描述一种用于基因工程的新型热爱型I-BCRISPR-Cas系统.
- 开发一种用于基因组编辑和转录抑制的多功能工具,用于热友和中友宿主.
- 为高价值产品合成设计增强的热友细胞工厂.
主要方法:
- 来自Parageobacillus thermoglucosidasius的一种I-B型CRISPR-Cas系统的识别和表征.
- 开发一种可切换的CRISPR-Cas工具,通过调整crRNA长度来进行转录抑制和DNA裂变.
- 应用转化效率目标的全基因组选工具.
- 动态控制的超能力细胞的工程和热友的 рибофлавин细胞工厂.
主要成果:
- 鉴定的CRISPR-Cas系统表现出可调节的转录抑制 (<26bpcrRNA) 和DNA裂变 (>26bpcrRNA) 活动.
- 对于热性宿主和半热性宿主,建立了一个直角工具.
- 在P. thermoglucosidasius中通过多重抑制实现了高转化效率 (~10^8 CFU/μg DNA).
- 通过基因组规模工程构建了一个具有创纪录标位的热友性 рибофлавин细胞工厂.
结论:
- 这项工作为P. thermoglucosidasius提供了一个强大而通用的基因操纵工具包.
- 开发的系统显著推进了用于工业生物技术的热友细胞工厂的工程.
- 能够在热友生物中进行多样化的高效基因操纵,促进强大的工业微生物平台的开发.
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