arXiv:2507.13950cs.LGphysics.bio-ph2025-07被引 1

用生成模型加速蛋白构象空间探索,提升采样效率。

MoDyGAN: Combining Molecular Dynamics With GANs to Investigate Protein Conformational Space

  • 将蛋白3D结构转为2D矩阵,适配图像类GAN架构
  • 生成的构象与分子动力学模拟高度一致,插值路径吻合
  • 适用于刚性蛋白和多肽,可拓展至复杂三维结构

由于基于物理的动态模拟计算成本高昂,广泛探索蛋白构象景观仍是计算生物学中的重大挑战。本文提出新方法MoDyGAN,结合分子动力学(MD)与生成对抗网络(GAN),用于探索蛋白构象空间。该方法包含一个生成器,将高斯分布映射为基于MD的蛋白轨迹;以及一个融合集成学习与双判别器的精炼模块,进一步提升生成构象的真实性。核心创新在于一种可逆的表示技术,将3D蛋白结构转化为2D矩阵,从而可使用先进的图像类GAN架构。我们以三个刚性蛋白验证了该方法能生成合理的新构象;并以十丙氨酸为例,展示潜在空间插值结果与受力分子动力学(SMD)模拟轨迹高度一致。结果表明,将蛋白表示为类似图像的数据,为应用先进深度学习技术于生物分子模拟开辟新路径,实现高效构象状态采样。该框架还具有向其他复杂3D结构扩展的潜力。

原文摘要 · Abstract (English)

Extensively exploring protein conformational landscapes remains a major challenge in computational biology due to the high computational cost involved in dynamic physics-based simulations. In this work, we propose a novel pipeline, MoDyGAN, that leverages molecular dynamics (MD) simulations and generative adversarial networks (GANs) to explore protein conformational spaces. MoDyGAN contains a generator that maps Gaussian distributions into MD-derived protein trajectories, and a refinement module that combines ensemble learning with a dual-discriminator to further improve the plausibility of generated conformations. Central to our approach is an innovative representation technique that reversibly transforms 3D protein structures into 2D matrices, enabling the use of advanced image-based GAN architectures. We use three rigid proteins to demonstrate that MoDyGAN can generate plausible new conformations. We also use deca-alanine as a case study to show that interpolations within the latent space closely align with trajectories obtained from steered molecular dynamics (SMD) simulations. Our results suggest that representing proteins as image-like data unlocks new possibilities for applying advanced deep learning techniques to biomolecular simulation, leading to an efficient sampling of conformational states. Additionally, the proposed framework holds strong potential for extension to other complex 3D structures.

蛋白质结构生成模型分子动力学

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