一个可编程的CRISPR/Cas9工具包改善了Bacillus subtilis中的烯生产
Yang Liu1, Haijiao Cheng1, Haoni Li1,2
1Key Laboratory of Systems Microbial Biotechnology, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, China.
Applied and environmental microbiology
|June 5, 2023
概括
这项研究介绍了一套CRISPR/Cas9工具包,用于有效地进行细菌的代谢工程,简化基因整合和基因表达,以产生像利科这样有价值的化合物.
科学领域:
- 合成生物学 合成生物学
- 微生物工程 微生物工程
- 生物技术是生物技术.
背景情况:
- 细菌细菌是一种安全且广泛使用的宿主,用于生产重组蛋白质和化学物质.
- B. subtilis的代谢工程至关重要,但受到有限的选择性标记物的阻碍,特别是在复杂的途径上.
- 需要有效的遗传工具来克服B. subtilis.的这些局限性.
研究的目的:
- 开发一个易于使用的基于CRISPR/Cas9的克隆工具包,用于B. subtilis代谢工程.
- 解决染色体集成,促进体选择,终结体功能和指导RNA向方面的挑战.
- 为了证明工具包在优化工业相关化合物的生产中的实用性.
主要方法:
- 利用CRISPR/Cas9技术,为B. subtilis.构建了一个多功能克隆工具包.
- 描述了六种促进剂 (0.9到23倍的P43强度) 和七种终止剂 (>90%的效率).
- 设计了六个指导RNA目标,并使用GFP报告员证实了高达100%的集成效率.
主要成果:
- 开发了一套工具,使得快速克隆和单步子克隆能够在B. subtilis.中实现稳定的染色体集成.
- 通过操纵生物合成途径中的13个关键基因,成功优化了白甘生产.
- 鉴定出了特定的基因集群 (ispG-idi-dxs-ispD阳性,dxr-ispE-ispF-ispH阴性) 影响烯产量.
结论:
- 开发的工具包显著促进了B. subtilis.的途径组装和基因表达.
- 这一策略使B. subtilis菌株的快速工程能够用于复杂的化学和制药生产.
- 该工具包增强了B. subtilis作为生物底盘的工业应用潜力.
相关概念视频
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