复杂结构的高精度预测
Mikhail Ignatov1,2, Akhil Jindal1,2, Sergei Kotelnikov1,2
1Department of Applied Mathematics and Statistics, Stony Brook University, Stony Brook, New York 11794, United States.
Journal of the American Chemical Society
|March 24, 2023
概括
我们开发了一种计算方法来准确模拟PROTAC三元复合体. 这种方法通过分析E3连接酶-标蛋白相互作用和链接器构造来预测PROTAC降解活性.
科学领域:
- 生物化学
- 结构生物学
- 计算化学
背景情况:
- 蛋白质溶解向基因组 (PROTACs) 是诱导向蛋白质降解的异构功能分子.
- 通过在目标蛋白质E3联酶和PROTAC分子之间形成三元复合体来起作用.
- 这些三元复合体的精确结构建模对于理解PROTAC机制和设计新疗法至关重要.
研究的目的:
- 提出一种用于生成高精度结构模型的新计算方法 E3 合酶-PROTAC-目标蛋白三元复合体.
- 使用已知的 PROTAC 结构和盲目测试案例验证开发的计算方法的预测准确性.
- 阐明三元复合结构,稳定性和PROTAC介导的蛋白质降解之间的关系.
主要方法:
- 开发一种计算方法,将"无声"卷积术语纳入蛋白质-蛋白质对接,以基于链接器构造的镜姿势.
- 针对相同E3连接酶的同一蛋白质的多个PROTAC模型的集群算法的实施.
- 该方法应用于已知的PROTAC结构和涉及BRAF突变V600E的盲测试案例.
主要成果:
- 来自计算方法的最大共识集群始终显示出三元复杂结构的高预测精度.
- 预测模型的组合准确地预测了三元复合体的解离率和合作性.
- 这项研究证实,PROTAC稳定了有利的E3酶-蛋白相互作用,但不一定是最有利的蛋白质-蛋白质几何结构.
结论:
- 开发的计算方法使得PROTAC三元复合体的精确结构建模,有助于PROTAC设计和优化.
- 这些发现突显了链接体构成和三元复合体稳定性对PROTAC疗效的重要性.
- 这种方法为PROTAC的作用机制及其作为治疗剂的潜力提供了宝贵的见解.
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