Journal
JOURNAL OF PHYSICAL CHEMISTRY A
Volume 116, Issue 1, Pages 704-719Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp209579w
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Funding
- MEXT, Japan
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We develop the pair interaction energy decomposition analysis (PIEDA) in solution by combining the fragment molecular orbital (FMO) method with the polarizable continuum model (PCM). The solvent screening of the electrostatic interaction and the desolvation penalty in complex formation are described by this approach from ab initio calculations of fragments and their pairs. The applications to the complex of solvated sodium and chlorine ions, as well as to lysine and aspartic acid, show how the analysis helps reveal the physical picture. The PIEDA/PCM method is also applied to a small protein chignolin (PDB: 1UAO), and the solvent screening of the pair interactions is discussed.
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