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The role of human in the loop: lessons from D3R challenge 4

Abstract

The rapid development of new machine learning techniques led to significant progress in the area of computer-aided drug design. However, despite the enormous predictive power of new methods, they lack explainability and are often used as black boxes. The most important decisions in drug discovery are still made by human experts who rely on intuitions and simplified representation of the field. We used D3R Grand Challenge 4 to model contributions of human experts during the prediction of the structure of protein–ligand complexes, and prediction of binding affinities for series of ligands in the context of absence or abundance of experimental data. We demonstrated that human decisions have a series of biases: a tendency to focus on easily identifiable protein–ligand interactions such as hydrogen bonds, and neglect for a more distributed and complex electrostatic interactions and solvation effects. While these biases still allow human experts to compete with blind algorithms in some areas, the underutilization of the information leads to significantly worse performance in data-rich tasks such as binding affinity prediction.

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Correspondence to Oleg V. Stroganov.

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Stroganov, O.V., Novikov, F.N., Medvedev, M.G. et al. The role of human in the loop: lessons from D3R challenge 4. J Comput Aided Mol Des 34, 121–130 (2020). https://doi.org/10.1007/s10822-020-00291-4

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Keywords

  • Lead finder
  • D3R
  • Drug design data resource
  • Molecular docking
  • Human in the loop
  • Machine learning