Target-Specific Prediction of Ligand Affinity with Structure-Based Interaction Fingerprints

Journal of Chemical Information and Modeling
Florian LeidnerCelia A Schiffer

Abstract

Discovery and optimization of small molecule inhibitors as therapeutic drugs have immensely benefited from rational structure-based drug design. With recent advances in high-resolution structure determination, computational power, and machine learning methodology, it is becoming more tractable to elucidate the structural basis of drug potency. However, the applicability of machine learning models to drug design is limited by the interpretability of the resulting models in terms of feature importance. Here, we take advantage of the large number of available inhibitor-bound HIV-1 protease structures and associated potencies to evaluate inhibitor diversity and machine learning models to predict ligand affinity. First, using a hierarchical clustering approach, we grouped HIV-1 protease inhibitors and identified distinct core structures. Explicit features including protein-ligand interactions were extracted from high-resolution cocrystal structures as 3D-based fingerprints. We found that a gradient boosting machine learning model with this explicit feature attribution can predict binding affinity with high accuracy. Finally, Shapley values were derived to explain local feature importance. We found specific van der Waals (vdW) intera...Continue Reading

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Citations

Jan 8, 2021·Chemical Reviews·Ashley N MatthewCelia A Schiffer
Mar 31, 2021·Journal of Chemical Theory and Computation·Florian LeidnerCelia A Schiffer
Aug 28, 2021·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Shunsuke TamuraKimito Funatsu

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