构建者的基准测试:对PRosettaC和AlphaFold3进行比较分析,以预测PROTAC三元复合体
Joseph M Schulz1, Sarah I Schürer2, Robert C Reynolds3
1University of Miami.
Research square
|July 9, 2025
概括
精确建模三元复合体是PROTAC药物设计的关键. 这项研究对AlphaFold3和PRosettaC进行了基准测试,发现PRosettaC在动态模拟中表现有前途,尽管静态模型的局限性很大.
科学领域:
- 生物化学和结构生物学
- 计算化学的计算化学
- 药物发现 药物发现 药物发现
背景情况:
- 使用蛋白质溶解向金马 (PROTACs) 的向蛋白质降解是一种快速发展的治疗方式.
- 准确预测三元复杂结构,包括目标蛋白,E3结合酶和PROTAC,对于合理的降解剂设计至关重要,但仍然具有挑战性.
- 现有的计算工具需要对实验数据进行严格的基准测试.
研究的目的:
- 系统地评估AlphaFold3和PRosettaC在预测三元复杂结构中的性能.
- 评估辅助蛋白和链接器采样对预测准确性的影响.
- 引入一个包含分子动力学模拟的动态评估框架,以实现更现实的基准测试.
主要方法:
- 对AlphaFold3和PRosettaC与36个实验解决的三元复合体进行基准测试.
- 使用DockQ得分来量化预测复合体的结构忠实度.
- 采用分子动力学模拟来分析短暂的结构状态和动态兼容性.
主要成果:
- 由于包含非特定的辅助蛋白质,AlphaFold3的准确性可能被高估.
- 在特定情况下,PRosettaC提供了精确的几何模型,但由于链接器采样不足而困难.
- 动态分析显示,一些PRosettaC模型在不通过静态评估捕获的过渡状态中达到高精度.
结论:
- 静态基准测试可能无法完全捕捉PROTAC三元复杂预测计算工具的性能.
- 通过分子动力学结合蛋白质灵活性对于更全面的评估至关重要.
- 这项研究为评估"in silico"工具提供了一个精细的框架,有助于PROTACs的合理发展.
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