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Updated: Sep 10, 2025

Using In Vitro and In-cell SHAPE to Investigate Small Molecule Induced Pre-mRNA Structural Changes

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Published on: January 30, 2019

一个多层次的研究来描述SHAPE探测器/RNA分子预活性复合物及其在启动SHAPE反应中的作用

Cécilia Hognon¹, Ameni Ben Abdeljaoued¹, Pierre Hardouin¹

¹Université Paris Cité, CiTCoM, CNRS, F-75006 Paris, France.

Journal of chemical information and modeling

|August 27, 2025

概括

了解RNA结构是细胞功能的关键. 这项研究揭示了SHAPE化学探测器如何与RNA相互作用,通过分子模拟和量子力学澄清了它的反应性.

科学领域:

结构生物学
计算化学
分子生物物理学

背景情况:

但高分辨率的确定是具有挑战性的.
化学探测, 像SHAPE, 很受欢迎, 但它的反应机制不太清楚.
SHAPE的反应性与RNA的局部结构和动态有关.

研究的目的:

阐明RNA局部结构,动态和SHAPE化学反应之间的关系.
提供关于SHAPE探测器预反应复合物形成和结合模式的分子见解.

主要方法:

结合偏向分子动力学 (MD) 模拟和QM/MM计算的多尺度方法.
雨采样 (美国) MD模拟以分析结合角度和预反应复合物形成.
QM/MM模拟以表征化反应的初始步骤和脱质.

主要成果:

当地的RNA环境极大地影响了SHAPE探测器的招募和安置.
受结合角度影响的有利结合对于预反应复合体的形成至关重要.
基脱质和基化取决于当地的环境和探头的近距离;不需要事先形成氧离子.

结论:

这项研究为SHAPE探测器的反应性提供了新的分子层面的理解.
这些发现澄清了无法解释的SHAPE反应性,并突出了局部RNA结构和动态的重要性.
这些结果促进了化学探测用于RNA结构的确定.

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Probing RNA Structure with Dimethyl Sulfate Mutational Profiling with Sequencing In Vitro and in Cells

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