Energy patterns in coupled alpha-helix protein chains with diagonal and off-diagonal couplings

Journal article

Authors / Editors

Tabi, Condrad

Research Areas

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Publication Details

Author list: Tabi CB, Ondoua RY, Fouda HPE, Kofane TC

Publisher: Elsevier

Place: AMSTERDAM

Publication year: 2016

Journal: Physics Letters A (0375-9601)

Journal acronym: PHYS LETT A

Volume number: 380

Issue number: 31-32

Start page: 2374

End page: 2381

Number of pages: 8

ISSN: 0375-9601

eISSN: 1873-2429

Languages: English-Great Britain (EN-GB)

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Abstract

We introduce off-diagonal effects in the three-stranded model of alpha-helix chains, which bring about additional nonlinear terms to enhance the way energy spreads among the coupled spines. This is analyzed through the modulational instability theory. The linear stability analysis of plane wave solutions is performed and the competitive effects of diagonal and off-diagonal interactions are studied, followed by direct numerical simulations. Some features of the obtained solitonic structures are discussed. (C) 2016 Elsevier B.V. All rights reserved.

Keywords

alpha-helix, Energy, solitons

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