在金黄色葡萄球菌中开发一种无诱导剂,受病毒性基因促进体控制,光记者标记的CRISPR干扰系统
Roni Miah1, Mona Johannessen1, Morten Kjos2
1Department of Medical Biology and Center for New Antibacterial Strategies (CANS), UT- The Arctic University of Norway, Tromsø, Norway.
Microbiology spectrum
|August 20, 2024
概括
我们开发了一种无诱导剂的CRISPRi系统用于金黄色葡萄球菌使用内源性毒性基因促进剂. 这种新的方法避免了诱导毒性,并改善了细菌基因调节的系统可访问性.
科学领域:
- 微生物学 微生物学
- 分子生物学分子生物学
- 基因规则 基因规则
背景情况:
- 克里斯普尔干扰 (CRISPRi) 使用dCas9和引导RNA进行基因沉默.
- 诱导dCas9表达的诱导性促进体可以影响细胞生理学,并且可获得性有限.
- 黄金葡萄球菌是一种重要的临床病原体,需要有效的基因操纵工具.
研究的目的:
- 开发一种无诱导体的CRISPRi系统,用于金黄色葡萄球菌.
- 为了利用内源性毒性基因促进剂 (vgp) 进行dCas9表达.
- 为了证明S. aureus中功能性CRISPRi介导的基因调节.
主要方法:
- 在S. aureus中设计的CRISPRi系统USA300 LAC.
- 使用内源性毒性基因促进物 (凝固酶,自溶酶,纤维素结合蛋白A) 表达dCas9.
- 集成了一个光报道器来监控促销商的活动.
- 向的基本基因 (例如,青素结合蛋白1) 和毒性因子.
主要成果:
- 由内源性毒性基因促进体控制的成功dCas9表达.
- 通过向青素结合蛋白来实现CRISPRi介导的增长停止 1.
- 展示了目标基因表达的成功下调和凝结酶活性的抑制.
- 验证了S. aureus中病毒性基因促进器驱动的CRISPRi系统的功能.
结论:
- 开发的病毒性基因促进器驱动的CRISPRi系统为S. aureus的基因调节提供了一种有效的,无诱导剂的方法.
- 该系统克服了传统的依赖诱导器的CRISPRi系统的局限性.
- 它为研究S. aureus病变和开发新疗法提供了有价值的工具.
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