Energy transfer along ?-helical proteins
| Autor: | Rocio Palma |
|---|---|
| Rok vydání: | 1992 |
| Předmět: |
Quantitative Biology::Biomolecules
Hydrogen bond Chemistry Energy flux Condensed Matter Physics Second quantization Molecular physics Atomic and Molecular Physics and Optics Davydov soliton symbols.namesake Distribution function Excited state symbols Molecule Physical and Theoretical Chemistry Atomic physics Hamiltonian (quantum mechanics) |
| Zdroj: | International Journal of Quantum Chemistry. 44:167-177 |
| ISSN: | 1097-461X 0020-7608 |
| Popis: | The aim of this paper was to establish a distribution function for the number of vibrational excitons in a given state N(r,k) for describing the energy-transfer process along α-helical proteins under normal physiological conditions. In the background lies Davydov's model, where the most important role is placed by the amide-I bond (CO). In this protein, the peptide group molecules are localized along three chains, which are relatively tightly linked by hydrogen bonds. Their vibrations are weakly connected with other normal vibrations. The Hamiltonian of such a chain is expressed in terms of the second quantization in the approximation when only one molecule is excited by the energy of hydrolysis of ATP and transfers its energy to the neighboring molecules. The further development of the model is made using Boltzman's equation in the stationary case at high temperatures T/ω ≫ 1. We determined the temperature dependence of the energy flux. The best result was that the process of energy transfer is determined, principally, by the vibrational exciton–phonon interaction. © 1992 John Wiley & Sons, Inc. |
| Databáze: | OpenAIRE |
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