2020年6月29日
Launching of Davydov solitons in protein $α$-helix spines
Physica E: Low-dimensional Systems and Nanostructures
- ,
- 巻
- 124
- 号
- 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
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- 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
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- 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