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- W2137977944 abstract "The structure of Watson-Crick-type adenine-thymine and guanine-cytosine pairs has been studied by hybrid Monte Carlo (HMC) and path integral hybrid Monte Carlo (PIHMC) simulations with the use of semiempirical PM6-DH+ method in the gas phase. We elucidated the nuclear quantum effect and temperature dependency on the hydrogen-bonded moiety of base pairs. It was shown that the contribution of nuclear quantum effect on the hydrogen-bonded structure is significant not only at low temperature 150 K but also at temperature as high as 450 K. The relative position of hydrogen-bonded proton between two heavy atoms and the nuclear quantum nature of the proton are also shown. Furthermore, we have applied principal component analysis to HMC and PIHMC simulations to analyze the nuclear quantum effect on intermolecular motions. We found that the ratio of Buckle mode (lowest vibrational mode from normal mode analysis) decreases due to the nuclear quantum effect, whereas that of Propeller mode (second lowest vibrational mode) increases. In addition, nonplanar structures of base pairs were found to become stable due to the nuclear quantum effect from two-dimensional free energy landscape along Buckle and Propeller modes." @default.
- W2137977944 created "2016-06-24" @default.
- W2137977944 creator A5061163379 @default.
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- W2137977944 date "2013-08-05" @default.
- W2137977944 modified "2023-10-05" @default.
- W2137977944 title "Nuclear quantum effect and temperature dependency on the hydrogen-bonded structure of base pairs" @default.
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- W2137977944 doi "https://doi.org/10.1002/jcc.23399" @default.
- W2137977944 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/23913712" @default.
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