通过CRISPR/Cas9的动力机制揭示的功能洞察
Austin T Raper1, Anthony A Stephenson1, Zucai Suo1
1Department of Chemistry and Biochemistry, ‡Ohio State Biochemistry Program, and §The James Comprehensive Cancer Center, The Ohio State University , Columbus, Ohio 43210, United States.
Journal of the American Chemical Society
|February 15, 2018
概括
这项研究定义了Streptococcus pyogenes Cas9的动力机制,揭示了缓慢的DNA产物释放使其成为单次转换酶. 了解Cas9的动力学对于基因编辑技术的发展至关重要.
科学领域:
- 生物化学
- 分子生物学
- 遗传学
背景情况:
- Prokaryotic 适应性免疫导致了 CRISPR-Cas9 在基因工程中的广泛应用.
- 目前尚不清楚Cas9的动力机制和DNA裂变细节.
研究的目的:
- 确定Streptococcus pyogenes Cas9从指导RNA结合到DNA裂变和产品释放的动力机制.
- 在Cas9中阐明HNH和RuvC核酶活性调节的动力基础.
主要方法:
- 对Streptococcus pyogenes Cas9的动态分析
- 同时测量HNH和RuvC核酶对DNA裂变的贡献.
主要成果:
- 在第一个转换中,DNA关联是限制速度的;从三元复合体的分裂是快速的.
- 极其缓慢的DNA产品释放限制了Cas9的单次转换活动.
- HNH 域对 RuvC 核酶的活性进行结构调节.
结论:
- 提供了Cas9的关键动态和功能细节.
- 在基因编辑实验和非目标DNA分裂的研究中提供信息.
- 支持Cas9作为生物技术工具的持续发展.
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