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arXiv 2307.07085physics.chem-phcs.AI
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用于蛋白质-配体系统及更广泛体系模拟的机器学习分子力学力场

Machine-learned molecular mechanics force field for the simulation of protein-ligand systems and beyond

Memorial Sloan Kettering Cancer Center(纪念斯隆凯特琳癌症中心);Asahi Kasei Pharma Corporation(旭化成制药株式会社);University of California, Irvine(加州大学欧文分校);University of California San Diego(加州大学圣迭戈分校);University of Colorado Boulder(科罗拉多大学博尔德分校);Open Molecular Software Foundation(开放分子软件基金会)
Kenichiro Takaba, Iván Pulido, Pavan Kumar Behara, Chapin E. Cavender, Anika J. Friedman, Michael M. Henry, Hugo MacDermott Opeskin, Christopher R. Iacovella, A… 展开作者

Kenichiro Takaba, Iván Pulido, Pavan Kumar Behara, Chapin E. Cavender, Anika J. Friedman, Michael M. Henry, Hugo MacDermott Opeskin, Christopher R. Iacovella, Arnav M. Nagle, Alexander Matthew Payne, Michael R. Shirts, David L. Mobley, John D. Chodera, Yuanqing Wang

AI总结:

本文提出了一种基于图神经网络的端到端可微机器学习分子力学力场espaloma-0.3,通过拟合超110万量子化学计算数据,实现了对蛋白质-配体系统结合自由能的高精度预测,为系统构建可扩展的准确力场提供了新路径。

摘要:

开发可靠且可扩展的分子力学(MM)力场——即表征分子系统势能面的快速经验模型——对于生物分子模拟和计算机辅助药物设计是不可或缺的。在此,我们引入了一种通用且可扩展的机器学习MM力场espaloma-0.3,以及一个使用图神经网络克服传统基于规则方法局限性的端到端可微框架。该模型在单个GPU日内完成训练,拟合了包含超过110万次能量与力计算的大型多样化量子化学数据集,espaloma-0.3重现了与药物发现高度相关的化学领域的量子化学能量特性,包括小分子、肽和核酸。此外,该力场维持了小分子的量子化学能量最小化几何结构,并保留了肽的凝聚相性质,自洽地参数化蛋白质和配体以产生稳定的模拟,从而实现对结合自由能的高精度预测。该方法展示了作为系统构建更准确力场的前进方向的巨大潜力,这些力场可轻松扩展至感兴趣的新化学领域。

英文摘要:

The development of reliable and extensible molecular mechanics (MM) force fields -- fast, empirical models characterizing the potential energy surface of molecular systems -- is indispensable for biomolecular simulation and computer-aided drug design. Here, we introduce a generalized and extensible machine-learned MM force field, \texttt{espaloma-0.3}, and an end-to-end differentiable framework using graph neural networks to overcome the limitations of traditional rule-based methods. Trained in a single GPU-day to fit a large and diverse quantum chemical dataset of over 1.1M energy and force calculations, \texttt{espaloma-0.3} reproduces quantum chemical energetic properties of chemical domains highly relevant to drug discovery, including small molecules, peptides, and nucleic acids. Moreover, this force field maintains the quantum chemical energy-minimized geometries of small molecules and preserves the condensed phase properties of peptides, self-consistently parametrizing proteins and ligands to produce stable simulations leading to highly accurate predictions of binding free energies. This methodology demonstrates significant promise as a path forward for systematically building more accurate force fields that are easily extensible to new chemical domains of interest.

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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