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大规模并行分析针对RNA的CRISPR-Cas13d

Hung-Che Kuo¹, Joshua Prupes², Chia-Wei Chou²

¹Department of Molecular Biosciences and Institute for Cellular and Molecular Biology, University of Texas at Austin, Austin, TX, 78712, USA. hckuo@utexas.edu.

Nature communications

|January 12, 2024

概括

克里斯普尔-Cas13dRNA向对RNA二次结构敏感,而不仅仅是序列. 这一发现使得精确的RNA检测成为可能,比如使用工程CRISPRRNA (crRNA) 来区分SARS-CoV-2变种.

科学领域:

分子生物学分子生物学
生物技术是生物技术.
遗传学遗传学是一个

背景情况:

CRISPR-Cas13d是一种用于RNA操纵和诊断的多功能工具.
目前对其RNA结合和分裂特异性的全面了解是有限的.

研究的目的:

系统地描述CRISPR-Cas13d的RNA结合和分裂特异性.
开发一个Cas13dRNA向的预测模型.
设计Cas13d系统用于特定的RNA检测,例如区分病毒变异.

主要方法:

开发和应用RNA芯片混合协会映射平台 (RNA-CHAMP) 来分析数千种RNA变异的结合亲和关系.
对CRISPR-Cas13d与多种RNA标相互作用的深入分析.
生物物理建模以阐明RNA识别机制.

主要成果:

克里斯普尔-Cas13d不需要一个原始空间器的侧面序列.
目标RNA的二次结构显著影响Cas13d的结合和裂变.
结合对远端crRNA-目标RNA区域的不匹配敏感,而近端变化影响核酶活性.
目标识别始于RNA的远端.

结论:

CRISPR-Cas13d的RNA向主要是由RNA二次结构决定的,而不是仅仅是序列.
一个生物物理模型准确地预测了Cas13d RNA的识别.
工程CRISPRRNA (crRNA) 可以设计用于区分特定的RNA目标,通过区分SARS-CoV-2变种来证明这一点.

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