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arXiv 1907.06952physics.chem-phphysics.bio-phphysics.comp-ph
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基于密度泛函理论和量子机器学习的可伸缩分子力场参数化方法

A Scalable Molecular Force Field Parameterization Method Based on Density Functional Theory and Quantum-Level Machine Learning

Raimondas Galvelis, Stefan Doerr, Joao M. Damas, Matt J. Harvey, Gianni De Fabritiis

摘要:

快速准确的分子力场参数化是一个尚未解决的问题。准确的FF通常不适用于所有分子,如新型药物样分子。虽然存在基于量子力学(QM)的方法来以更好的精度对它们进行参数化,但它们在计算上昂贵且缓慢,这限制了对少量分子的适用性。在这里,我们提出了一个自动FF参数化方法,它可以利用DFT计算或近似QM能量产生不同的神经网络电位(NNPs),以获得改进的分子参数。我们证明,对于torchani-ANI-1x NNP的情况下,我们可以参数化的小分子在一小部分的时间相比,使用DFT QM计算的等效参数化,同时产生更准确的参数比FF(GAFF 2)。我们希望我们的方法是至关重要的计算结构为基础的药物发现。当前版本可在PlayMolecule(www.playmolecule.org)上获得,并在HTMD中实现,允许使用不同的QM和NNP选项对分子进行参数化。

英文摘要:

Fast and accurate molecular force field (FF) parameterization is still an unsolved problem. Accurate FFs are not generally available for all molecules, like novel druglike molecules. While methods based on quantum mechanics (QM) exist to parameterize them with better accuracy, they are computationally expensive and slow, which limits applicability to a small number of molecules. Here, we present an automated FF parameterization method which can utilize either DFT calculations or approximate QM energies produced by different neural network potentials (NNPs), to obtain improved parameters for molecules. We demonstrate that for the case of torchani-ANI-1x NNP, we can parameterize small molecules in a fraction of time compared with an equivalent parameterization using DFT QM calculations while producing more accurate parameters than FF (GAFF2). We expect our method to be of critical importance in computational structure-based drug discovery. The current version is available at PlayMolecule (www.playmolecule.org) and implemented in HTMD, allowing to parameterize molecules with different QM and NNP options.

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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