酸化介导对GTP结合KRAS的形状动态的影响的分子机制,由GaMD轨迹基于深度学习探测
Jianzhong Chen1,2, Jian Wang1, Wanchun Yang1
1School of Science, Shandong Jiaotong University, Jinan 250357, China.
Molecules (Basel, Switzerland)
|May 25, 2024
概括
在特定部位的KRAS酸化显著改变了其结构和功能. 这项研究揭示了这些变化如何影响KRAS开关域,影响其活动.
科学领域:
- 分子生物学分子生物学
- 计算生物学 计算生物学
- 生物化学 生物化学
背景情况:
- 克拉斯蛋白是细胞信号通路的关键调节者.
- 已知转化后的修改,如酸化,可以调节KRAS活性.
- 了解这些修改对于破译KRAS相关疾病至关重要.
研究的目的:
- 研究酸化如何影响与GTP结合的KRAS的结构动态的分子机制.
- 阐明开关域在酸化后的KRAS功能中的作用.
- 探索特定酸化位点 (pY32,pY64,pY137) 对KRAS构成的影响.
主要方法:
- 使用了高斯加速分子动力学 (GaMD) 模拟.
- 使用深度学习 (DL) 技术来分析模拟数据.
- 进行了自由能源景观 (FEL) 和主要组件分析 (PCA).
主要成果:
- 深度学习在酸化后在KRAS开关域中发现了显著的结构差异.
- 在pY32,pY64和pY137的酸化诱导了更多无序的交换机域和关闭和开放状态之间的过渡.
- PCA揭示了PC1和PC2的主要运动控制了化KRAS中的这些状态过渡.
- 由于酸化,观察到GTP,Mg2+和交换域之间的相互作用发生变化.
结论:
- 在pY32,pY64和pY137的酸化通过改变交换机域动态和相互作用来调节KRAS活动.
- 这项研究提供了对酸化如何调节KRAS功能的分子理解.
- 这些发现为未来对KRAS生物学和治疗策略的研究提供了理论见解.
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