Efficient conformational sampling and weak scoring in docking programs? Strategy of the wisdom of crowds

Journal of Cheminformatics
Ludovic Chaput, Liliane Mouawad

Abstract

In drug design, an efficient structure-based optimization of a ligand needs the precise knowledge of the protein-ligand interactions. In the absence of experimental information, docking programs are necessary for ligand positioning, and the choice of a reliable program is essential for the success of such an optimization. The performances of four popular docking programs, Gold, Glide, Surflex and FlexX, were investigated using 100 crystal structures of complexes taken from the Directory of Useful Decoys-Enhanced database. The ligand conformational sampling was rather efficient, with a correct pose found for a maximum of 84 complexes, obtained by Surflex. However, the ranking of the correct poses was not as efficient, with a maximum of 68 top-rank or 75 top-4 rank correct poses given by Glidescore. No relationship was found between either the sampling or the scoring performance of the four programs and the properties of either the targets or the small molecules, except for the number of ligand rotatable bonds. As well, no exploitable relationship was found between each program performance in docking and in virtual screening; a wrong top-rank pose may obtain a good score that allows it to be ranked among the most active compounds...Continue Reading

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Methods Mentioned

BETA
X-ray

Software Mentioned

CHARMM
PLP
Schrödinger
rmsd
Gold
CHARMM36
R
Ligprep
MarvinSketch
Glide

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