Torsional anharmonicity in the conformational analysis of beta-D-galactose.
Schemes to include a treatment of torsional anharmonicity in the conformational analysis of biological molecules are introduced. The approaches combine ab initio electronic energies and harmonic frequencies with anharmonic torsional partition functions calculated using the torsional path integral Mo...
| Main Authors: | , , |
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| Format: | Journal article |
| Language: | English |
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2006
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| _version_ | 1826279856020652032 |
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| author | Sturdy, Y Skylaris, C Clary, D |
| author_facet | Sturdy, Y Skylaris, C Clary, D |
| author_sort | Sturdy, Y |
| collection | OXFORD |
| description | Schemes to include a treatment of torsional anharmonicity in the conformational analysis of biological molecules are introduced. The approaches combine ab initio electronic energies and harmonic frequencies with anharmonic torsional partition functions calculated using the torsional path integral Monte Carlo method on affordable potential energy surfaces. The schemes are applied to the conformational study of the monosaccharide beta-d-galactose in the gas phase. The global minimum structure is almost exclusively populated at 100 K, but a large number of conformers are present at ambient and higher temperatures. Both quantum mechanical and anharmonic effects in the torsional modes have little effect on the populations at all temperatures considered, and it is, therefore, expected that standard harmonic treatments are satisfactory for the conformational study of monosaccharides. |
| first_indexed | 2024-03-07T00:05:02Z |
| format | Journal article |
| id | oxford-uuid:7744272e-32aa-44df-9a1f-70a55139d8fe |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T00:05:02Z |
| publishDate | 2006 |
| record_format | dspace |
| spelling | oxford-uuid:7744272e-32aa-44df-9a1f-70a55139d8fe2022-03-26T20:22:41ZTorsional anharmonicity in the conformational analysis of beta-D-galactose.Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:7744272e-32aa-44df-9a1f-70a55139d8feEnglishSymplectic Elements at Oxford2006Sturdy, YSkylaris, CClary, DSchemes to include a treatment of torsional anharmonicity in the conformational analysis of biological molecules are introduced. The approaches combine ab initio electronic energies and harmonic frequencies with anharmonic torsional partition functions calculated using the torsional path integral Monte Carlo method on affordable potential energy surfaces. The schemes are applied to the conformational study of the monosaccharide beta-d-galactose in the gas phase. The global minimum structure is almost exclusively populated at 100 K, but a large number of conformers are present at ambient and higher temperatures. Both quantum mechanical and anharmonic effects in the torsional modes have little effect on the populations at all temperatures considered, and it is, therefore, expected that standard harmonic treatments are satisfactory for the conformational study of monosaccharides. |
| spellingShingle | Sturdy, Y Skylaris, C Clary, D Torsional anharmonicity in the conformational analysis of beta-D-galactose. |
| title | Torsional anharmonicity in the conformational analysis of beta-D-galactose. |
| title_full | Torsional anharmonicity in the conformational analysis of beta-D-galactose. |
| title_fullStr | Torsional anharmonicity in the conformational analysis of beta-D-galactose. |
| title_full_unstemmed | Torsional anharmonicity in the conformational analysis of beta-D-galactose. |
| title_short | Torsional anharmonicity in the conformational analysis of beta-D-galactose. |
| title_sort | torsional anharmonicity in the conformational analysis of beta d galactose |
| work_keys_str_mv | AT sturdyy torsionalanharmonicityintheconformationalanalysisofbetadgalactose AT skylarisc torsionalanharmonicityintheconformationalanalysisofbetadgalactose AT claryd torsionalanharmonicityintheconformationalanalysisofbetadgalactose |