Assessing Force Field Potential Energy Function Accuracy via a Multipolar Description of Atomic Electrostatic Interactions in RNA

Computational investigations of RNA properties often rely on a molecular mechanical approach to define molecular potential energy. Force fields for RNA typically employ a point charge model of electrostatics, which does not provide a realistic quantum-mechanical picture. In reality, electron distrib...

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Veröffentlicht in:Journal of chemical information and modeling 2018-11, Vol.58 (11), p.2239-2254
Hauptverfasser: Yuan, Yongna, Zhang, Zhuangzhuang, Mills, Matthew J. L, Hu, Rongjing, Zhang, Ruisheng
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Sprache:eng
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Zusammenfassung:Computational investigations of RNA properties often rely on a molecular mechanical approach to define molecular potential energy. Force fields for RNA typically employ a point charge model of electrostatics, which does not provide a realistic quantum-mechanical picture. In reality, electron distributions around nuclei are not spherically symmetric and are geometry dependent. A multipole expansion method which allows for incorporation of polarizability and anisotropy in a force field is described, and its applicability to modeling the behavior of RNA molecules is investigated. Transferability of the model, critical for force field development, is also investigated.
ISSN:1549-9596
1549-960X
DOI:10.1021/acs.jcim.8b00328