Aggarwal, A and Naskar, S and Maiti, PK (2022) Molecular Rectifiers with a Very High Rectification Ratio Enabled by Oxidative Damage in Double-Stranded DNA. In: Journal of Physical Chemistry B, 126 (25). pp. 4636-4646.
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Abstract
In this work, we report a novel strategy to construct highly efficient molecular diodes using oxidatively damaged DNA molecules. Being exposed to several endogenous and exogenous events, DNA suffers from constant oxidative damage, leading to the oxidation of guanine to 8-oxoguanine (8oxoG). Here, we study the charge migration properties of native and oxidatively damaged DNA using a multiscale multiconfigurational methodology comprising molecular dynamics, density functional theory, and kinetic Monte Carlo simulations. We perform a comprehensive study to understand the effect of different concentrations and locations of 8oxoG in a dsDNA sequence on its charge-transport properties and find tunable rectifier properties having potential applications in molecular electronics such as molecular switches and molecular rectifiers. We also discover the negative differential resistance properties of the fully oxidized Drew-Dickerson sequence. The presence of 8oxoG guanine leads to the trapping of charge, thus operating as a charge sink, which reveals how oxidized guanine saves the rest of the genome from further oxidative damage.
| Item Type: | Journal Article |
|---|---|
| Publication: | Journal of Physical Chemistry B |
| Publisher: | American Chemical Society |
| Additional Information: | The copyright for this article belongs to the Authors. |
| Keywords: | Bioinformatics; Density functional theory; Intelligent systems; Molecular dynamics; Monte Carlo methods; Oxidation; Positive ions; Rectifying circuits, 8-oxoguanine; Charge migration; DNA molecules; Exposed to; Guanine; Molecular diodes; Molecular rectifier; Novel strategies; Oxidative damage; Rectification ratio, DNA, DNA; guanine, DNA damage; metabolism; oxidation reduction reaction; oxidative stress, DNA; DNA Damage; Guanine; Oxidation-Reduction; Oxidative Stress |
| Department/Centre: | Division of Physical & Mathematical Sciences > Physics |
| Date Deposited: | 21 Sep 2022 06:02 |
| Last Modified: | 21 Sep 2022 06:02 |
| URI: | https://eprints.iisc.ac.in/id/eprint/76612 |
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