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arXiv 2201.08714q-bio.BMcs.LGphysics.chem-ph
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分子构象比较的等距离几何误差

Equivalent Distance Geometry Error for Molecular Conformation Comparison

Peking University(北京大学)

Shuwen Yang, Tianyu Wen, Ziyao Li, Guojie Song

摘要:

直接从输入分子图生成3-D结构的简单构象生成模型在机器学习的各种分子任务中发挥着重要作用,例如3D-QSAR和药物设计中的虚拟筛选。然而,这些模型中现有的损失函数要么花费太多的时间,要么不能保证在优化过程中的等价性,这意味着不公平地对待不同的项目,导致生成的构象的局部几何形状差。因此,我们提出了等价距离几何误差(EDGE)来计算构象之间的差异,其中构象几何中的三种要素(键长、键角和二面角)以一定的权重进行了等价优化。在改进的方法中,优化的特点是最小化3跳内原子对距离的线性变换。大量的实验表明,与现有的损失函数相比,EDGE执行有效和高效的两个任务在相同的骨干。

英文摘要:

Straight-forward conformation generation models, which generate 3-D structures directly from input molecular graphs, play an important role in various molecular tasks with machine learning, such as 3D-QSAR and virtual screening in drug design. However, existing loss functions in these models either cost overmuch time or fail to guarantee the equivalence during optimization, which means treating different items unfairly, resulting in poor local geometry in generated conformation. So, we propose Equivalent Distance Geometry Error (EDGE) to calculate the differential discrepancy between conformations where the essential factors of three kinds in conformation geometry (i.e. bond lengths, bond angles and dihedral angles) are equivalently optimized with certain weights. And in the improved version of our method, the optimization features minimizing linear transformations of atom-pair distances within 3-hop. Extensive experiments show that, compared with existing loss functions, EDGE performs effectively and efficiently in two tasks under the same backbones.

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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