The generalized Born/volume integral implicit solvent model: Estimation of the free energy of hydration using London dispersion instead of atomic surface area

2008/02/28 by Paul Labute · 1 citation
Physics and Astronomy · Chemistry · Biochemistry, Genetics and Molecular Biology · #Spectroscopy and Quantum Chemical Studies #Electrostatics and Colloid Interactions #DNA and Nucleic Acid Chemistry

paper · doi:10.1002/jcc.20933

Abstract

A new generalized Born model for estimating the free energy of hydration is presented. The new generalized Born/volume integral (GB/VI) estimates the free energy of hydration as a classical electrostatic energy plus a cavitation energy that is not based upon atomic surface area (SA) used in GB/SA hydration models but on a VI London dispersion energy estimated from quantities already calculated in the classical electrostatic energy. The (relatively few) GB/VI model parameters are fitted to experimental data, and parameterizations for two different atomic partial charge models are presented. Comparison of the calculated and experimental free energies of hydration for 560 small molecules (both neutral and charged) shows good agreement (r(2) = 0.94).

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