論文

査読有り 筆頭著者 責任著者 本文へのリンクあり 国際共著 国際誌
2020年6月29日

Launching of Davydov solitons in protein $α$-helix spines

Physica E: Low-dimensional Systems and Nanostructures
  • Danko D. Georgiev
  • ,
  • James F. Glazebrook

124
開始ページ
114332
終了ページ
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1016/j.physe.2020.114332, 10.48550/arXiv.2006.16798

Biological order provided by $\alpha$-helical secondary protein structures is an important resource exploitable by living organisms for increasing the efficiency of energy transport. In particular, self-trapping of amide I energy quanta by the induced phonon deformation of the hydrogen-bonded lattice of peptide groups is capable of generating either pinned or moving solitary waves following the Davydov quasiparticle/soliton model. The effect of applied in-phase Gaussian pulses of amide I energy, however, was found to be strongly dependent on the site of application. Moving solitons were only launched when the amide I energy was applied at one of the $\alpha$-helix ends, whereas pinned solitons were produced in the $\alpha$-helix interior. In this paper, we describe a general mechanism that launches moving solitons in the interior of the $\alpha$-helix through phase-modulated Gaussian pulses of amide I energy. We also compare the predicted soliton velocity based on effective soliton mass and the observed soliton velocity in computer simulations for different parameter values of the isotropy of the exciton-phonon interaction. The presented results demonstrate the capacity for explicit control of soliton velocity in protein $\alpha$-helices, and further support the plausibility of gradual optimization of quantum dynamics for achieving specialized protein functions through natural selection.

リンク情報
DOI
https://doi.org/10.1016/j.physe.2020.114332
DOI
https://doi.org/10.48550/arXiv.2006.16798 本文へのリンクあり
arXiv
http://arxiv.org/abs/arXiv:2006.16798
URL
http://arxiv.org/abs/2006.16798 本文へのリンクあり
URL
http://arxiv.org/pdf/2006.16798 本文へのリンクあり
ID情報
  • DOI : 10.1016/j.physe.2020.114332
  • DOI : 10.48550/arXiv.2006.16798
  • ISSN : 1386-9477
  • ORCIDのPut Code : 76488891
  • arXiv ID : arXiv:2006.16798

エクスポート
BibTeX RIS