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arXiv 2007.11309cond-mat.softphysics.bio-phq-bio.BM
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DNA和RNA --哪个显示更高的电子传导性?

DNA versus RNA -- which shows higher electronic conduction?

Abhishek Aggarwal, Saientan Bag, Ravindra Venkatramani, Manish Jain, Prabal K. Maiti

摘要:

在这项研究中,我们比较了多个(双链)dsRNA序列与相应的dsDNA序列的电荷传输特性。最近的研究提出了一个矛盾的图片相对电荷传输效率在A型DNA:RNA杂交和双链DNA。使用多尺度建模框架,我们计算电导的dsDNA和dsRNA的Landauer形式主义在相干极限和Marcus-Hush理论在非相干极限。我们发现,双链DNA进行更好地比dsRNA在这两个电荷传输制度。我们的分析表明,双链DNA和dsRNA的扭曲角和滑动的结构差异是在非相干跳跃区的双链DNA的高电导背后的主要原因。然而,在相干极限下,对于相同的碱基对长度,对于dsRNA具有相对于dsDNA的较小的端到端长度的形态,dsRNA的电导高于dsDNA的电导。

英文摘要:

In this study, we compare the charge transport properties of multiple (double stranded) dsRNA sequences with corresponding dsDNA sequences. Recent studies have presented a contradictory picture of relative charge transport efficiencies in A-form DNA:RNA hybrids and dsDNA. Using a multiscale modelling framework, we compute conductance of dsDNA and dsRNA using Landauer formalism in coherent limit and Marcus-Hush theory in the incoherent limit. We find that dsDNA conducts better than dsRNA in both the charge transport regimes. Our analysis shows that the structural differences in the twist angle and slide of dsDNA and dsRNA are the main reasons behind the higher conductance of dsDNA in the incoherent hopping regime. In the coherent limit however, for the same base pair length, the conductance of dsRNA is higher than that of dsDNA for the morphologies where dsRNA has smaller end-to-end length relative to that of dsDNA.

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