Article ; Online: Updating atomic charge parameters of aliphatic amino acids: a quest to improve the performance of molecular modeling via sequential molecular dynamics and DFT-GIAO-NMR calculations.
Physical chemistry chemical physics : PCCP
2021 Volume 23, Issue 14, Page(s) 8413–8425
Abstract: In this work, we observe the behavior of the dipole moment, atomic charges, solute-solvent interactions and NMR spectroscopy of aliphatic amino acids in a water solution via the computational simulations of classical molecular dynamics and DFT quantum ... ...
| Abstract | In this work, we observe the behavior of the dipole moment, atomic charges, solute-solvent interactions and NMR spectroscopy of aliphatic amino acids in a water solution via the computational simulations of classical molecular dynamics and DFT quantum calculations. Our results indicate that the convergence of the atomic charge of the solute, from an iterative process, together with the dipole moment of the amino acid, alters the lifetime of hydrogen bonds present in the first solvation shell, resulting in the modification of its structure and dynamics. Using GIAO-DFT-NMR calculations, we assessed the impact of these structural solute-solvent modifications on the magnetic shielding constants of the solute carbon atoms. In this sense, we evaluate the importance of an update in parameters that describe atomic charges present in the CHARMM36 force field. |
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| MeSH term(s) | Amino Acids/chemistry ; Density Functional Theory ; Hydrogen Bonding ; Magnetic Resonance Spectroscopy ; Models, Chemical ; Molecular Dynamics Simulation/standards ; Solvents/chemistry ; Static Electricity ; Water/chemistry |
| Chemical Substances | Amino Acids ; Solvents ; Water (059QF0KO0R) |
| Language | English |
| Publishing date | 2021-03-25 |
| Publishing country | England |
| Document type | Journal Article |
| ZDB-ID | 1476244-4 |
| ISSN | 1463-9084 ; 1463-9076 |
| ISSN (online) | 1463-9084 |
| ISSN | 1463-9076 |
| DOI | 10.1039/d1cp00183c |
| Database | MEDical Literature Analysis and Retrieval System OnLINE |
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