Phosphorus Chemical Shifts in a Nucleic Acid Backbone from Combined Molecular Dynamics and Density Functional Calculations

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F10%3A00040633" target="_blank" >RIV/00216224:14310/10:00040633 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Phosphorus Chemical Shifts in a Nucleic Acid Backbone from Combined Molecular Dynamics and Density Functional Calculations

Popis výsledku v původním jazyce

A comprehensive quantum chemical analysis of the influence of backbone torsion angles on 31P chemical shifts in DNAs has been carried out. An extensive DFT study employed snapshots obtained from the molecular dynamics simulation of [d(CGCGAATTCGCG)]2 toconstruct geometries of a hydrated dimethyl phosphate, which was used as a model for the phosphodiester linkage. Our calculations provided differences of 2.1 +/- 0.3 and 1.6 +/- 0.3 ppm between the BI and BII chemical shifts in two B-DNA residues of interest, which is in a very good agreement with the difference of 1.6 ppm inferred from experimental data. A more negative 31P chemical shift for a residue in pure BI conformation compared to residues in mixed BI/BII conformation states is provided by DFT,in agreement with the NMR experiment. Statistical analysis of the MD/DFT data revealed a large dispersion of chemical shifts in both BI and BII regions of DNA structures. 31P chemical shift ranges within 3.5 +/- 0.8 ppm in the BI region a

Název v anglickém jazyce

Phosphorus Chemical Shifts in a Nucleic Acid Backbone from Combined Molecular Dynamics and Density Functional Calculations

Popis výsledku anglicky

A comprehensive quantum chemical analysis of the influence of backbone torsion angles on 31P chemical shifts in DNAs has been carried out. An extensive DFT study employed snapshots obtained from the molecular dynamics simulation of [d(CGCGAATTCGCG)]2 toconstruct geometries of a hydrated dimethyl phosphate, which was used as a model for the phosphodiester linkage. Our calculations provided differences of 2.1 +/- 0.3 and 1.6 +/- 0.3 ppm between the BI and BII chemical shifts in two B-DNA residues of interest, which is in a very good agreement with the difference of 1.6 ppm inferred from experimental data. A more negative 31P chemical shift for a residue in pure BI conformation compared to residues in mixed BI/BII conformation states is provided by DFT,in agreement with the NMR experiment. Statistical analysis of the MD/DFT data revealed a large dispersion of chemical shifts in both BI and BII regions of DNA structures. 31P chemical shift ranges within 3.5 +/- 0.8 ppm in the BI region a

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CF - Fyzikální chemie a teoretická chemie

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2010

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

The Journal of the American Chemical Society

ISSN

0002-7863

e-ISSN

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Svazek periodika

132

Číslo periodika v rámci svazku

48

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

10

Strana od-do

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Kód UT WoS článku

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EID výsledku v databázi Scopus

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