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

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

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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.

Original languageEnglish
Article number374
JournalEuropean Physical Journal B
Volume86
Issue number9
DOIs
Publication statusPublished - Sep 1 2013

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All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Tabi, C. B., Mimshe Fewu, J. C., Ekobena Fouda, H. P., Mohamadou, A., & Kofané, T. C. (2013). Nonlinear wave trains in three-strand α-helical protein models. European Physical Journal B, 86(9), [374]. https://doi.org/10.1140/epjb/e2013-40467-6