特定的多价值分子可以促进CRISPR介导的转录激活
Rui Chen1,2,3,4, Xinyao Shi1,3, Xiangrui Yao1,3
1Shenzhen Key Laboratory of Gene Regulation and Systems Biology, School of Life Sciences, Southern University of Science and Technology, Shenzhen, China.
Nature communications
|August 22, 2024
概括
内在无序区域 (IDR) 和模块化域 (MD) 可以增强CRISPR/Cas基因激活. 最佳的合作性,而不是最大的合作性,以及针对促进剂-增强剂相互作用是使用这些多价值分子进行强大的激活的关键.
科学领域:
- 分子生物学分子生物学
- 基因规则 基因规则
- 生物技术是生物技术.
背景情况:
- 克里斯普尔/卡斯系统提供精确的基因编辑能力.
- 与CRISPR/Cas组件融合的转录激活剂可以调节基因表达.
- 本质上无序区域 (IDR) 和模块化域 (MD) 在增强CRISPR/Cas活动中的作用尚未完全被理解.
研究的目的:
- 研究IDRs增强CRISPR/Cas基转录激活的机制.
- 探索将IDRs和MDs与CRISPR/Cas激活剂相结合的协同效应.
- 通过使用工程CRISPR/Cas系统,确定强大的基因激活的最佳策略.
主要方法:
- 将12种不同的IDR与dCas9-VP64转录激活剂融合.
- 评估IDRs对基因激活的影响,独立于相位分离.
- 将dCas9-VP64-IDR结构与模块化域 (MD) 结合起来.
- 系统地改变gRNA结合位点并评估cis-trans合作性.
- 准促进剂-增强剂对并评估染色质相互作用.
主要成果:
- 在12种测试的IDR中,有7种增强了dCas9-VP64的激活,而不管分相.
- 单独使用MDs并没有增强激活,但与dCas9-VP64-IDR结合时显著增强了激活.
- 最佳的cis-trans合作性,而不是最大的,导致了最强大的基因激活.
- 准促进剂-增强剂区域和增强色素相互作用放大了协同效应.
结论:
- 通过结合IDRs和MDs,可以有效地增强工程CRISPR/Cas激活器.
- 该研究提供了对多价值分子介导的基因激活机制的见解.
- 使用CRISPR/Cas技术开发了一种用于有效激活基因的多功能平台.
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