Drug Discovery in the Age of AI – Accelerating the Journey from Molecule to Medicine

Methods in Drug Discovery and Discovering Lead Molecules
Joshua S. Fleishman

Joshua S. Fleishman

St. John's University College of Pharmacy and Health Sciences, Jamaica, NY, USA

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First published: 26 May 2025

Abstract

Advances in artificial intelligence (AI) have revolutionized scientific research and are predicted to have a profound impact on biomedicine. Molecular representations are used in AI, providing a foundation for molecular discovery. This review explores the transformative impact of molecular representation on drug discovery, highlighting the critical role played by accurate representations in decoding chemical structures to enable rational molecular design. Various kinds of molecular representation are described, including linear notation, molecular graphs, physicochemical descriptors, and deep learning representations, along with their contribution to AI-assisted molecular discovery. The roles of machine learning and deep learning in predicting molecular properties, optimizing lead compounds, and exploring the vast chemical space of molecules are also discussed. The potential application of generative deep learning models to de novo drug molecular design and optimization is also reviewed.

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