新模型精准模拟分子静电与电荷转移,助力药物研发与材料设计。
MACE-POLAR-1: A Polarisable Electrostatic Foundation Model for Molecular Chemistry
- 结合几何特征与极化迭代,显式建模长程静电与诱导效应。
- 在1亿个量子计算数据上训练,化学精度媲美杂化泛函方法。
- 适合研究带电/自旋态变化、蛋白质-配体相互作用等复杂体系。
准确建模静电相互作用和电荷转移是计算化学的基础,但多数机器学习势函数依赖局部原子描述符,无法捕捉长程静电效应。我们提出一种新的分子化学静电基础模型,基于MACE架构扩展了长程相互作用与电荷极化的显式处理。该方法融合局部多体几何特征与非自洽场框架,通过可学习的电荷与自旋密度极化迭代模拟诱导效应,并利用可学习的福克函数进行全局电荷平衡以调控总电荷与总自旋。这一设计实现了对变电荷与自旋态体系的高精度物理描述,同时保持计算效率。模型在包含1亿个杂化DFT计算的OMol25数据集上训练,在热化学、反应能垒、构象能量及过渡金属配合物等多样基准测试中达到化学精度,性能媲美杂化泛函。尤其值得注意的是,引入长程静电后,非共价相互作用与超分子复合物的描述显著提升:在X23-DMC数据集上预测分子晶体生成能误差低于1 kcal/mol,且在蛋白-配体相互作用上较短程模型提升四倍。该模型具备处理可变电荷/自旋态、响应外场、提供可解释的自旋分辨电荷密度能力,从分子到蛋白-配体复合物均保持高精度,是计算分子化学与药物发现的通用工具。
原文摘要 · Abstract (English)
Accurate modelling of electrostatic interactions and charge transfer is fundamental to computational chemistry, yet most machine learning interatomic potentials (MLIPs) rely on local atomic descriptors that cannot capture long-range electrostatic effects. We present a new electrostatic foundation model for molecular chemistry that extends the MACE architecture with explicit treatment of long-range interactions and electrostatic induction. Our approach combines local many-body geometric features with a non-self-consistent field formalism that updates learnable charge and spin densities through polarisable iterations to model induction, followed by global charge equilibration via learnable Fukui functions to control total charge and total spin. This design enables an accurate and physical description of systems with varying charge and spin states while maintaining computational efficiency. Trained on the OMol25 dataset of 100 million hybrid DFT calculations, our models achieve chemical accuracy across diverse benchmarks, with accuracy competitive with hybrid DFT on thermochemistry, reaction barriers, conformational energies, and transition metal complexes. Notably, we demonstrate that the inclusion of long-range electrostatics leads to a large improvement in the description of non-covalent interactions and supramolecular complexes over non-electrostatic models, including sub-kcal/mol prediction of molecular crystal formation energy in the X23-DMC dataset and a fourfold improvement over short-ranged models on protein-ligand interactions. The model's ability to handle variable charge and spin states, respond to external fields, provide interpretable spin-resolved charge densities, and maintain accuracy from small molecules to protein-ligand complexes positions it as a versatile tool for computational molecular chemistry and drug discovery.
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