Nonlinear wave trains in three-strand α-helical protein models

C.B. Tabi (), J.C. Mimshe Fewu, H.P. Ekobena Fouda, A. Mohamadou and T.C. Kofané

The European Physical Journal B: Condensed Matter and Complex Systems, 2013, vol. 86, issue 9, 1-8

Abstract: Realistic models of α-helix proteins are composed of three covalently-bonded strands, each of which is made of hydrogen-bonded peptide units. The modulational instability analysis of such complex molecular systems is carried out in this work. We show that the exciton-vibron coupling parameter contributes to the explosion and expansion of instability regions. The right choice of the modulational instability parameters leads to the formation of excitonic modulated pulse-like structures. It is argued that covalent bonds are compressed during the process of energy transport, while hydrogen bond oscillations display regular trains of breather-like objects. We also argue that the probable way of energy transport, from modulational instability, is through hydrogen bonds. Copyright EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2013

Keywords: Statistical and Nonlinear Physics (search for similar items in EconPapers)
Date: 2013
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DOI: 10.1140/epjb/e2013-40467-6

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