Journal
JOURNAL OF CHEMICAL PHYSICS
Volume 133, Issue 4, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3458798
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Funding
- Villum Kahn Rasmussen foundation
- Lundbeck Foundation
- Novo Nordisk Foundation
- Carlsberg Foundation
- Danish Center for Scientific Computing
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We report on the results of testing the reference interaction site model (RISM) for the estimation of the hydration free energy of druglike molecules. The optimum model was selected after testing of different RISM free energy expressions combined with different quantum mechanics and empirical force-field methods of structure optimization and atomic partial charge calculation. The final model gave a systematic error with a standard deviation of 2.6 kcal/mol for a test set of 31 molecules selected from the SAMPL1 blind challenge set [J. P. Guthrie, J. Phys. Chem. B 113, 4501 (2009)]. After parametrization of this model to include terms for the excluded volume and the number of atoms of different types in the molecule, the root mean squared error for a test set of 19 molecules was less than 1.2 kcal/mol. (C) 2010 American Institute of Physics. [doi:10.1063/1.3458798]
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