通过加速分子动力学模拟研究的与N6甲基氨酸RNA复合的YTH域的结构和动态特性
Mingwei Li1, Guanglin Chen2, Zhiyong Zhang1,2
1MOE Key Laboratory for Membraneless Organelles & Cellular Dynamics National Science Center for Physical Sciences at Microscale Division of Life Sciences and Medicine, and Biomedical Sciences and Health Laboratory of Anhui Province University of Science and Technology of China Hefei 230026 China.
Quantitative biology (Beijing, China)
|February 12, 2026
概括
YTH域比非甲基化RNA更有效地结合甲基化RNA,揭示了参与这种相互作用的关键水性残留物. 这项研究增强了对YTH-RNA复杂动态和结合机制的理解.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 结构生物学 结构生物学
背景情况:
- N6-甲基腺 (m6A) 修改对于基因调节和发育至关重要.
- YT521-B同质 (YTH) 域蛋白识别m6A的修饰,影响细胞过程.
- YTH-m6A RNA复合体的精确结合模式和结构动态在很大程度上是未知的.
研究的目的:
- 研究YTH域的结构和动态特征与m6ARNA复合.
- 阐明结合机制并确定涉及YTH-RNA相互作用的关键残留物.
主要方法:
- 微秒时间尺度的加速分子动力学 (aMD) 模拟.
- 主要组件分析 (PCA) 和分子力学概括的出生表面积 (MM/GBSA) 计算.
- 接触分析,基于接触的PCA (conPCA) 和定位突变发生.
主要成果:
- 与非甲基化RNA (A3RNA) 相比,YTH域表现出更大的结构稳定性和与甲基化RNA (m6A3RNA) 的有利结合.
- 加速分子动力学模拟显示了YTH-A3和YTH-m6A3复合体之间明显的识别循环动力学.
- 疏水性残留物 (例如,W380,L383-V385,W431-P434,M437,M441-L442) 对m6ARNA与YTH域的增强结合至关重要.
结论:
- 甲基化RNA显著增强通过疏水性相互作用与YTH域的结合亲和力.
- 一种"符合性选择"机制可能控制着YTH-RNA结合过程.
- 这项研究为M6ARNA被YTH域蛋白识别的结构基础提供了关键的见解.
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