arXiv:2505.01700cs.LGq-bio.QM2025-05被引 13

AI模型在蛋白质-配体对接任务中超越物理方法,且可通过后处理优化提升精度。

PoseX: AI Defeats Physics Approaches on Protein-Ligand Cross Docking

  • 构建开源基准PoseX,涵盖自对接与交叉对接场景,支持多类方法评估。
  • AI方法整体对接成功率高于物理方法,松弛后可显著减少分子内冲突。
  • 结合AI建模与物理后处理能实现卓越性能,适合药物研发人员参考。

现有蛋白质-配体对接研究多聚焦自对接场景,实用性不足;部分方法依赖复杂框架,难以高效评估。为此,我们设计了开源基准PoseX,用于评估自对接与交叉对接,实现对算法进展的全面、实用评估。具体包括:构建包含718个自对接和1,312个交叉对接条目的新数据集;整合23种方法,涵盖物理类(如Schrödinger Glide)、AI对接类(如DiffDock)和AI共折叠类(如AlphaFold3);开发松弛后处理方法以降低构象能量并优化结合构象;搭建实时排行榜供模型提交排名。大量实验揭示:(1)AI方法整体对接成功率持续优于物理方法;(2)多数AI方法的分子内/间冲突经松弛后显著缓解,表明结合AI建模与物理后处理可获优异表现;(3)除Boltz-1x外,其他AI共折叠方法存在配体立体化学问题,而后者引入物理启发势能有效修复幻觉,说明立体化学建模可显著提升结构合理性;(4)明确结合口袋信息能显著提升对接性能,尤其对AI共折叠方法具有重要指导意义。代码、数据集与排行榜已开源:https://github.com/CataAI/PoseX。

原文摘要 · Abstract (English)

Existing protein-ligand docking studies typically focus on the self-docking scenario, which is less practical in real applications. Moreover, some studies involve heavy frameworks requiring extensive training, posing challenges for convenient and efficient assessment of docking methods. To fill these gaps, we design PoseX, an open-source benchmark to evaluate both self-docking and cross-docking, enabling a practical and comprehensive assessment of algorithmic advances. Specifically, we curated a novel dataset comprising 718 entries for self-docking and 1,312 entries for cross-docking; second, we incorporated 23 docking methods in three methodological categories, including physics-based methods (e.g., Schrödinger Glide), AI docking methods (e.g., DiffDock) and AI co-folding methods (e.g., AlphaFold3); third, we developed a relaxation method for post-processing to minimize conformational energy and refine binding poses; fourth, we built a leaderboard to rank submitted models in real-time. We derived some key insights and conclusions from extensive experiments: (1) AI approaches have consistently outperformed physics-based methods in overall docking success rate. (2) Most intra- and intermolecular clashes of AI approaches can be greatly alleviated with relaxation, which means combining AI modeling with physics-based post-processing could achieve excellent performance. (3) AI co-folding methods exhibit ligand chirality issues, except for Boltz-1x, which introduced physics-inspired potentials to fix hallucinations, suggesting modeling on stereochemistry improves the structural plausibility markedly. (4) Specifying binding pockets significantly promotes docking performance, indicating that pocket information can be leveraged adequately, particularly for AI co-folding methods, in future modeling efforts. The code, dataset, and leaderboard are released at https://github.com/CataAI/PoseX.

蛋白质对接AI药物发现分子建模

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