Energy patterns in twist-opening models of DNA with solvent interactions

Journal article

Authors / Editors

Tabi, Condrad

Research Areas

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Publication Details

Author list: Tabi CB, Bineli G, Mohamadou A

Publisher: Springer

Place: DORDRECHT

Publication year: 2015

Journal: Journal of Biological Physics (0092-0606)

Journal acronym: J BIOL PHYS

Volume number: 41

Issue number: 4

Start page: 391

End page: 408

Number of pages: 18

ISSN: 0092-0606

eISSN: 1573-0689

Languages: English-Great Britain (EN-GB)

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Abstract

Energy localization, via modulation instability, is addressed in a modified twist-opening model of DNA with solvent interactions. The Fourier expansion method is used to reduce the complex roto-torsional equations of the system to a set of discrete coupled nonlinear Schrodinger equations, which are used to perform the analytical investigation of modulation instability. We find that the instability criterion is highly influenced by the solvent parameters. Direct numerical simulations, performed on the generic model, further confirm our analytical predictions, as solvent interactions bring about highly localized energy patterns. These patterns are also shown to be robust under thermal fluctuations.

Keywords

DNA, Energy localization, Modulational instability, Solvent interaction

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