Abstract
The ability to propose reasonable ligand-receptor binding geometries is crucial to the success of structure-based drug design. One approach is to “dock” molecules together in many ways and then “score” or evaluate each orientation; in a database of compounds, those which score well should be more likely to bind to the target macromolecule. A method that combines a rapid, geometric docking algorithm with the evaluation of molecular mechanics interaction energies is presented. The “force field score” is successful in identifying the experimental binding mode in four systems, and represents an improvement over the other scoring methods tested. The degree of orientational sampling required to reproduce and identify the known geometries, with and without energy-minimization, is also investigated. Both scoring and sampling issues are of paramount importance to the usefulness of molecular docking in real-life applications.
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