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arXiv 2408.12419cs.LGcs.AI
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AlphaFolding:结合参考引导与运动引导的动态蛋白质结构预测4D扩散模型

AlphaFolding: 4D Diffusion for Dynamic Protein Structure Prediction with Reference and Motion Guidance

Fudan University(复旦大学);Shanghai Academy of Artificial Intelligence for Science(上海科学智能研究院);Nanjing University(南京大学)

Kaihui Cheng, Ce Liu, Qingkun Su, Jun Wang, Liwei Zhang, Yining Tang, Yao Yao, Siyu Zhu, Yuan Qi

AI总结:

针对蛋白质动态结构预测研究不足的问题,提出名为AlphaFolding的4D扩散模型,结合参考网络与运动对齐模块,可同时预测多时间步蛋白质轨迹,在基准测试中实现高精度动态结构预测。

摘要:

蛋白质结构预测对于理解蛋白质的结构-功能关系、推动生物学研究、助力药物研发与实验设计至关重要。尽管深度学习方法以及实验获得的3D蛋白质结构数据的增多加速了结构预测研究,但蛋白质结构的动态特性尚未得到充分关注。本研究提出了一种创新的4D扩散模型,该模型结合分子动力学(MD)模拟数据来学习动态蛋白质结构。我们的方法具备以下核心组成部分:(1)统一扩散模型,可生成包含主链和侧链的动态蛋白质结构,采用原子分组与侧链二面角预测技术;(2)参考网络,通过融合初始3D蛋白质结构的潜在嵌入提升结构一致性;(3)运动对齐模块,旨在增强多个时间步之间的时间结构连贯性。据我们所知,这是首个旨在同时预测多个时间步蛋白质轨迹的基于扩散的模型。在基准数据集上的验证表明,我们的模型在预测包含最多256个氨基酸的蛋白质在32个时间步内的动态3D结构时具有高精度,能够有效捕捉稳定状态下的局部柔性和显著构象变化。项目主页:https://fudan-generative-vision.github.io/AlphaFolding/#/

英文摘要:

Protein structure prediction is pivotal for understanding the structure-function relationship of proteins, advancing biological research, and facilitating pharmaceutical development and experimental design. While deep learning methods and the expanded availability of experimental 3D protein structures have accelerated structure prediction, the dynamic nature of protein structures has received limited attention. This study introduces an innovative 4D diffusion model incorporating molecular dynamics (MD) simulation data to learn dynamic protein structures. Our approach is distinguished by the following components: (1) a unified diffusion model capable of generating dynamic protein structures, including both the backbone and side chains, utilizing atomic grouping and side-chain dihedral angle predictions; (2) a reference network that enhances structural consistency by integrating the latent embeddings of the initial 3D protein structures; and (3) a motion alignment module aimed at improving temporal structural coherence across multiple time steps. To our knowledge, this is the first diffusion-based model aimed at predicting protein trajectories across multiple time steps simultaneously. Validation on benchmark datasets demonstrates that our model exhibits high accuracy in predicting dynamic 3D structures of proteins containing up to 256 amino acids over 32 time steps, effectively capturing both local flexibility in stable states and significant conformational changes. URL: https://fudan-generative-vision.github.io/AlphaFolding/#/

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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