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首页> 外文期刊>Physica status solidi, B. Basic research >A comparison of electronic states in periodic and aperiodic poly(dA)-poly(dT) DNA
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A comparison of electronic states in periodic and aperiodic poly(dA)-poly(dT) DNA

机译:周期性和非周期性poly(dA)-poly(dT)DNA中电子态的比较

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Using an ab initio tight-binding formalism based on density-functional theory [Lewis et al., Phys. Rev. B 64, 195103-1 (2001)], we present theoretical work on the electronic states in a model periodic DNA double helix of poly(dA)-poly(dT) (10 base-pairs). Comparison of the periodic structure is made to an aperiodic DNA structure with the same sequence, but the structure is distorted as a result of thermal fluctuations from a molecular-dynamics simulation. We find that the periodic structure exhibits periodic and very extended HOMO-LUMO states however, the equivalent states are quite localized in the aperiodic structure. [References: 59]
机译:使用基于密度泛函理论的从头算起紧密绑定形式主义[Lewis等,Phys。 Rev. B 64,195103-1(2001)],我们介绍了在poly(dA)-poly(dT)(10个碱基对)的模型周期性DNA双螺旋中对电子态的理论研究。比较了周期性结构与具有相同序列的非周期性DNA结构,但是由于分子动力学模拟的热涨落,结构发生了变形。我们发现,周期性结构表现出周期性且非常扩展的HOMO-LUMO状态,但是,等效状态非常局限在非周期性结构中。 [参考:59]

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