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- W3048559069 abstract "By combining analytical theory and Molecular Dynamics simulations we study the relaxation dynamics of DNA circular plasmids that initially undergo a local twist perturbation. We identify three distinctive time scales; (I) a rapid relaxation of local bending, (II) the slow twist spreading, and (III) the buckling transition taking place in a much longer time scale. In all of these stages, the twist-bend coupling arising from the groove asymmetry in DNA double helix clearly manifests. In particular, the separation of time scales allows to deduce an effective diffusion equation in stage (II), with a diffusion coefficient influenced by the twist-bend coupling. We also discuss the mapping of the realistic DNA model to the simplest isotropic twistable worm-like chain using the renormalized bending and twist moduli; although useful in many cases, it fails to make a quantitative prediction on the instability mode of buckling transition." @default.
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- W3048559069 date "2020-08-13" @default.
- W3048559069 modified "2023-10-16" @default.
- W3048559069 title "Twist dynamics and buckling instability of ring DNA: Effect of groove asymmetry and anisotropic bending" @default.
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- W3048559069 doi "https://doi.org/10.48550/arxiv.2008.05686" @default.
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