Evaluation of the performance of 3D virtual screening protocols: RMSD comparisons, enrichment assessments, and decoy selection—What can we learn from earlier mistakes?

  • Johannes Kirchmair
  • Patrick Markt
  • Simona Distinto
  • Gerhard Wolber
  • Thierry Langer
Article

Abstract

Within the last few years a considerable amount of evaluative studies has been published that investigate the performance of 3D virtual screening approaches. Thereby, in particular assessments of protein–ligand docking are facing remarkable interest in the scientific community. However, comparing virtual screening approaches is a non-trivial task. Several publications, especially in the field of molecular docking, suffer from shortcomings that are likely to affect the significance of the results considerably. These quality issues often arise from poor study design, biasing, by using improper or inexpressive enrichment descriptors, and from errors in interpretation of the data output. In this review we analyze recent literature evaluating 3D virtual screening methods, with focus on molecular docking. We highlight problematic issues and provide guidelines on how to improve the quality of computational studies. Since 3D virtual screening protocols are in general assessed by their ability to discriminate between active and inactive compounds, we summarize the impact of the composition and preparation of test sets on the outcome of evaluations. Moreover, we investigate the significance of both classic enrichment parameters and advanced descriptors for the performance of 3D virtual screening methods. Furthermore, we review the significance and suitability of RMSD as a measure for the accuracy of protein–ligand docking algorithms and of conformational space sub sampling algorithms.

Keywords

Virtual screening Evaluation of computational methods Pharmacophore modeling Protein–ligand docking Enrichment descriptors Decoy selection Virtual library design Tautomerism RMSD 

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Copyright information

© Springer Science+Business Media B.V. 2008

Authors and Affiliations

  • Johannes Kirchmair
    • 1
  • Patrick Markt
    • 2
  • Simona Distinto
    • 3
  • Gerhard Wolber
    • 1
  • Thierry Langer
    • 1
    • 2
  1. 1.Inte:Ligand Software-Entwicklungs- und Consulting GmbHMaria EnzersdorfAustria
  2. 2.Department of Pharmaceutical Chemistry, Institute of Pharmacy and Center for Molecular Biosciences (CMBI)University of InnsbruckInnsbruckAustria
  3. 3.Dipartimento Farmaco Chimico TecnologicoUniversita` degli Studi di CagliariCagliariItaly

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