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从CRISPR-sgRNA表达等离子体中虚假转录的RNA构成了生物分子凝聚物形成的支架,并阻碍了精确的基因组成像

Shiqi Mao¹, Ruonan Wu¹, Weibang Luo¹

¹Department of Biomedical Engineering, College of Future Technology, Peking University, Beijing 100871, China.

Nucleic acids research

|March 22, 2025

概括

来自CRISPR成像等离子体的加密转录会在细胞核中引起虚假信号. 移除等离子体骨干会减少这些信号,从而提高基因组成像的准确性.

科学领域:

分子生物学分子生物学
遗传学是一个遗传学.
细胞生物学细胞生物学

背景情况:

基于CRISPR的成像使用光标记的sgRNAs进行基因组位置分析.
非特定的探头积累可以导致假阳性信号,阻碍准确性.

研究的目的:

在基于CRISPR的基因组成像中识别假阳性信号的来源.
制定策略,以提高CRISPR成像系统的精度.

主要方法:

检查了sgRNA表达等离子体,转录和RNA结合蛋白的亚细胞局部.
研究了由神秘转录形成的核体的特性.
使用全等离子体与转录单元进行成像准确性的比较.

主要成果:

从sgRNA等离子体中虚假转录的加密转录是错误阳性焦点的主要原因.
这些神秘的转录形成了类似液体的核体,含有光蛋白.
使用sgRNA转录单元 (没有等离子体骨干) 显著减少了虚假信号.

结论:

隐秘的等离子体转录显示了以前未知的核活动.
移除等离子体骨干提供了一种简单的策略,以提高基于CRISPR的基因组成像准确性.

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