Energy transport mechanism in the form of proton soliton in a one-dimensional hydrogen-bonded polypeptide chain

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• 作者：L. Kavitha ; R. Priya ; N. Ayyappan ; D. Gopi ; S. Jayanthi
• 关键词：Hydrogen bond ; Proton transfer ; Solitons
• 刊名：Journal of Biological Physics
• 出版年：2016
• 出版时间：January 2016
• 年：2016
• 卷：42
• 期：1
• 页码：9-31
• 全文大小：1,157 KB
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• 作者单位：L. Kavitha (1) (2)
  R. Priya (3)
  N. Ayyappan (1)
  D. Gopi (4) (5)
  S. Jayanthi (3)
  
  1. Department of Physics, School of Basic and Applied Sciences, Central University of Tamilnadu, Thiruvarur, 610 101, Tamilnadu, India
  2. The Abdus Salam International Centre for Theoretical Physics, Trieste, Italy
  3. Department of Physics, Periyar University, Salem, 636 011, Tamilnadu, India
  4. Center for Nanoscience and Nanotechnology, Periyar University, Salem, 636 011, Tamilnadu, India
  5. Department of Chemistry, Periyar University, Salem, 636 011, Tamilnadu, India
  
• 刊物类别：Physics and Astronomy
• 刊物主题：Physics
  Biophysics and Biomedical Physics
  Condensed Matter
  Statistical Physics
  Polymer Sciences
  Bioinformatics
  Neurosciences
  
• 出版者：Springer Netherlands
• ISSN：1573-0689

文摘

The dynamics of protons in a one-dimensional hydrogen-bonded (HB) polypeptide chain (PC) is investigated theoretically. A new Hamiltonian is formulated with the inclusion of higher-order molecular interactions between peptide groups (PGs). The wave function of the excitation state of a single particle is replaced by a new wave function of a two-quanta quasi-coherent state. The dynamics is governed by a higher-order nonlinear Schrödinger equation and the energy transport is performed by the proton soliton. A nonlinear multiple-scale perturbation analysis has been performed and the evolution of soliton parameters such as velocity and amplitude is explored numerically. The proton soliton is thermally stable and very robust against these perturbations. The energy transport by the proton soliton is more appropriate to understand the mechanism of energy transfer in biological processes such as muscle contraction, DNA replication, and neuro-electric pulse transfer on biomembranes. Keywords Hydrogen bond Proton transfer Solitons