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Updated: Jun 6, 2025

Real-time Imaging of Single Engineered RNA Transcripts in Living Cells Using Ratiometric Bimolecular Beacons

Real-time Imaging of Single Engineered RNA Transcripts in Living Cells Using Ratiometric Bimolecular Beacons

Published on: August 6, 2014

RNA稳定外套蛋白用于活细胞中独特的单个mRNA的敏感和同时成像

Christopher J Kuffner, Alexander M Marzilli, John T Ngo

bioRxiv : the preprint server for biology

|November 28, 2024

概括

新的蛋白质探针 (dMCP和dPCP) 通过减少背景噪声显著提高了活细胞RNA成像灵敏度. 这一突破使单个mRNA分子和细胞内的双色RNA跟踪能够更清晰地可视化.

科学领域:

分子生物学分子生物学
细胞生物学细胞生物学
生物技术是生物技术.

背景情况:

活细胞RNA成像对于了解细胞过程至关重要.
现有的工具往往缺乏灵敏度,原因是未绑定探头的背景噪音.

研究的目的:

开发用于敏感活细胞RNA成像的增强型蛋白质探针.
为了减少背景排放,并改善单个mRNA分子的可视化.

主要方法:

将MS2和PP7外层蛋白转化为条件稳定的变体 (dMCP和dPCP).
采用了蛋白质工程技术,包括循环 permutation 和 degron masking.
使用直角MS2和PP7图案进行双色成像.

主要成果:

产生的dMCP和dPCP变体在与RNA脱离时迅速降解.
在活细胞中实现了单个mRNA分子的敏感可视化.
启用了使用双色图像的不同RNA物种的同时低背景可视化.

结论:

开发了用于活细胞RNA成像的多功能,低背景探测器.
这些探头增强了RNA局部化和调节的可视化.
这项技术对于涉及MS2和PP7标记RNA的成像和生物技术应用具有广泛的实用性.

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