We carried out a first-principles quantum-mechanical study of a set of full-turn A-form DNA oligonucleotides using density functional approximations. The structural features of the fully relaxed model DNA molecules and more importantly, the energetic and structural changes of these molecules under stretching conditions are examined in detail. Special attention is paid to the dependence of the structural properties on the stacking sequences of the constituent DNA base pairs. It appears that DNA oligonucleotides are extremely flexible, and structural properties such as the diameter and the widths of the minor and major grooves change regularly as a function of the stretching rate (stretching length in percentage). Additionally, we found that the length of the hydrogen bonds in the DNA base pairs varies with the DNA stacking sequence. This work indicates that rich information and insights can be gained from first principles studies of model DNA molecules of only atoms.
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7 December 2019
Research Article|
December 04 2019
A DFT study of energetic and structural properties of a full turn of A-form DNA under relaxed and stretching conditions
Yue Liu
;
Yue Liu
1
CAS Key Laboratory of Quantum Information, University of Science and Technology of China
, Hefei 230026, Anhui, China
2
CAS Center for Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China
, Hefei 230026, Anhui, China
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Xinguo Ren
;
Xinguo Ren
a)
1
CAS Key Laboratory of Quantum Information, University of Science and Technology of China
, Hefei 230026, Anhui, China
2
CAS Center for Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China
, Hefei 230026, Anhui, China
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Lixin He
Lixin He
b)
1
CAS Key Laboratory of Quantum Information, University of Science and Technology of China
, Hefei 230026, Anhui, China
2
CAS Center for Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China
, Hefei 230026, Anhui, China
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J. Chem. Phys. 151, 215102 (2019)
Article history
Received:
October 01 2019
Accepted:
November 07 2019
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Citation
Yue Liu, Xinguo Ren, Lixin He; A DFT study of energetic and structural properties of a full turn of A-form DNA under relaxed and stretching conditions. J. Chem. Phys. 7 December 2019; 151 (21): 215102. https://doi.org/10.1063/1.5129716
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