期刊
CHEMICAL PHYSICS LETTERS
卷 478, 期 4-6, 页码 238-242出版社
ELSEVIER
DOI: 10.1016/j.cplett.2009.07.054
关键词
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资金
- Ministry of Education, Culture, Sports, Science and Technology of Japan [20038008]
- Core Research for Evolutional Science and Technology from the Japan Science and Technology Agency
- Scientific Research on Priority Area 'Molecular Theory for Real Systems'
- Grant-in-Aid for Young Scientists (B) [20750004]
- Grants-in-Aid for Scientific Research [20750004, 20038008] Funding Source: KAKEN
The stabilities of products for proton-transfer reactions in stacked two guanine(G)-cytosine(C) pairs are discussed by means of Hartree-Fock, MP2 and density functional methods. The stacking energy of the original 5'-d(CpG)-3' (CG/GC) differs from that of single proton-transfer (SPT) product. On the other hand, the stacking energy of the original 5'-d(GpG)-3' (GC/GC) is essentially equal to the double proton-transfer (DPT) products. The dispersion forces of both CG/GC and its SPT product are similar to each other. Not only dispersion force but also Coulomb attraction contributes to the stability of the SPT product of CG/GC. (C) 2009 Elsevier B. V. All rights reserved.
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