非马科夫动态模型识别非规范的KRAS-VHL遇到复杂的构造,用于新的PROTAC设计
Yunrui Qiu1,2, Rafal P Wiewiora3, Jesus A Izaguirre4
1Department of Chemistry, Theoretical Chemistry Institute, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States.
JACS Au
|November 1, 2024
概括
一个新的计算协议预测了蛋白质与蛋白质的相互作用,用于设计蛋白质溶解向嵌合体 (PROTACs). 该方法有助于开发新型链接剂以稳定三元复合体,并增强针对癌症治疗的向蛋白质降解.
科学领域:
- 生物化学和结构生物学
- 计算化学和药物设计
- 瘤学和分子治疗学
背景情况:
- 向蛋白质降解 (TPD) 是一个有前途的治疗策略,蛋白质溶解向金马体 (PROTACs) 显示出显著的临床潜力.
- PROTACs的功能是通过劫持细胞的无素-蛋白酶系统来降解特定的感兴趣蛋白 (POI).
- 设计有效的PROTAC需要优化链接器,以稳定POI和E3结合酶之间的三元复合体.
研究的目的:
- 开发基于物理学的计算协议,用于预测E3链酶和POI之间的非正规和转移性蛋白质-蛋白质相互作用 (PPI) 接口.
- 帮助合理设计稳定三元复合体并增强向蛋白质降解的PROTACs的链接器.
- 探索瘤基因同类物和希佩尔-林道E3结合酶之间的固有PPI.
主要方法:
- 利用基于集成通用主方程 (IGME) 方法的非马科夫动态模型.
- 进行了全原子分子动力学模拟 (∼1.5 ms) 的无链接器碰撞复合体.
- 系统地探索和识别了代表不同PPI接口的超稳定状态.
主要成果:
- 计算协议预测了六个不同的元稳定状态,具有独特的PPI接口.
- 根据热力学/动力学稳定性和可用于链接器设计的可访问性,选择了三个有前途的元稳定状态.
- 一个预测的PPI接口与一个有效的PROTAC中最近确定的共晶结构密切匹配.
结论:
- 开发的基于物理学的协议可以预测转移稳定的POI-E3酶接口,这对PROTAC设计至关重要.
- 这种方法促进了连接器的合理设计,以稳定三元复合体并提高降解效率.
- 该协议具有促进开发基于PROTAC的新型治疗方法的巨大潜力.
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