Parageobacillus thermoglucosidasius 菌株工程使用一个神素响应的RiboCas来控制基因表达
Matthew S H Lau1, Abubakar Madika1,2, Ying Zhang1
1BBSRC/EPSRC Synthetic Biology Research Centre (SBRC), Biodiscovery Institute, School of Life Sciences, University of Nottingham, University Park, Nottingham NG7 2RD, U.K.
ACS synthetic biology
|March 22, 2024
概括
研究人员开发了一种可诱导的CRISPR/Cas9系统RiboCas93,用于热友细菌Parageobacillus thermoglucosidasius. 该系统提高了基因编辑效率,降低了毒性,从而实现了可持续的生物制造.
科学领域:
- 生物技术是生物技术.
- 合成生物学 合成生物学
- 微生物工程 微生物工程
背景情况:
- 对可持续化学品和燃料生产的日益增长的需求需要先进的生物发酵工艺.
- 热友微生物为工业生物工艺提供了优势,但需要增强的基因组编辑工具才能有效利用.
- 在*Parageobacillus thermoglucosidasius*中现有的CRISPR/Cas9基因编辑受到构成性Cas9表达的阻碍,导致低效率和非目标突变.
研究的目的:
- 开发一种可控制和高效的CRISPR/Cas9基因编辑系统,用于Parageobacillus thermoglucosidasius.
- 为了减轻与Cas9表达相关的毒性和非目标效应,在这个热友细菌中.
- 提高工业应用的突变生成效率.
主要方法:
- 设计了一种对神素有反应的合成核糖开关,以控制Cas9的表达.
- 开发了一个可诱导的CRISPR/Cas9系统,命名为RiboCas93.
- 评估了通过 рибо开关对基因表达的剂量依赖控制.
- 评估了转换效率,编辑效率和非目标突变 (SNP).
主要成果:
- 通过使用神氨酸诱导的核糖开关,证明了Cas9表达的剂量依赖控制.
- 在突变生成中实现了100%的效率.
- 显著提高编辑向量的转换效率.
- 降低了Cas9的毒性,通过观察到的单核酸多态度 (SNP) 的减少来证明.
结论:
- RiboCas93提供了一种高效可控的基因组编辑方法,用于*Parageobacillus thermoglucosidasius*.
- 可诱导系统克服了构成性Cas9表达的局限性,增强了工业生物制造的潜力.
- 这一进步促进了热友细菌的快速和精确的突变基因生成.
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