Journal
JOURNAL OF CHEMICAL THEORY AND COMPUTATION
Volume 8, Issue 8, Pages 2553-2558Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ct300203w
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Explicit solvent molecular dynamics free energy perturbation simulations were performed to predict absolute solvation free energies of 239 diverse small molecules. We use OPLS2.0, the next generation OPLS force field, and compare the results with popular small molecule force fields-OPLS_2005, GAFF, and CHARMm-MSI. OPLS2.0 produces the best correlation with experimental data (R-2 = 0.95, slope = 0.96) and the lowest average unsigned errors (0.7 kcal/mol). Important classes of compounds that performed suboptimally with OPLS_2005 show significant improvements.
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