Energy transport mechanism in the form of proton soliton in a one-dimensional hydrogen-bonded polypeptide chain |
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Authors: | L Kavitha R Priya N Ayyappan D Gopi S Jayanthi |
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Institution: | 1.Department of Physics, School of Basic and Applied Sciences,Central University of Tamilnadu,Thiruvarur,India;2.The Abdus Salam International Centre for Theoretical Physics,Trieste,Italy;3.Department of Physics,Periyar University,Salem,India;4.Center for Nanoscience and Nanotechnology,Periyar University,Salem,India;5.Department of Chemistry,Periyar University,Salem,India |
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Abstract: | 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. |
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Keywords: | Hydrogen bond Proton transfer Solitons |
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