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Development and validation of an improved algorithm for overlaying flexible molecules.


ABSTRACT: A program for overlaying multiple flexible molecules has been developed. Candidate overlays are generated by a novel fingerprint algorithm, scored on three objective functions (union volume, hydrogen-bond match, and hydrophobic match), and ranked by constrained Pareto ranking. A diverse subset of the best ranked solutions is chosen using an overlay-dissimilarity metric. If necessary, the solutions can be optimised. A multi-objective genetic algorithm can be used to find additional overlays with a given mapping of chemical features but different ligand conformations. The fingerprint algorithm may also be used to produce constrained overlays, in which user-specified chemical groups are forced to be superimposed. The program has been tested on several sets of ligands, for each of which the true overlay is known from protein-ligand crystal structures. Both objective and subjective success criteria indicate that good results are obtained on the majority of these sets.

SUBMITTER: Taylor R 

PROVIDER: S-EPMC3348445 | biostudies-literature | 2012 Apr

REPOSITORIES: biostudies-literature

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Development and validation of an improved algorithm for overlaying flexible molecules.

Taylor Robin R   Cole Jason C JC   Cosgrove David A DA   Gardiner Eleanor J EJ   Gillet Valerie J VJ   Korb Oliver O  

Journal of computer-aided molecular design 20120427 4


A program for overlaying multiple flexible molecules has been developed. Candidate overlays are generated by a novel fingerprint algorithm, scored on three objective functions (union volume, hydrogen-bond match, and hydrophobic match), and ranked by constrained Pareto ranking. A diverse subset of the best ranked solutions is chosen using an overlay-dissimilarity metric. If necessary, the solutions can be optimised. A multi-objective genetic algorithm can be used to find additional overlays with  ...[more]

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