Quantum-classical model of retinal photoisomerization reaction in visual pigment rhodopsin

A quantum-classical model of photoisomerization of the visual pigment rhodopsin chromophore is proposed. At certain (and more realistic) parameter value combinations, the model is shown to accurately reproduce a number of independent experimental data on the photoreaction dynamics: the quantum yield...

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Bibliographic Details
Published in:Doklady. Biochemistry and biophysics 2016-11, Vol.471 (1), p.435-439
Main Authors: Lakhno, V. D., Shigaev, A. S., Feldman, T. B., Nadtochenko, V. A., Ostrovsky, M. A.
Format: Article
Language:English
Subjects:
Algorithms
Biochemistry
Biological and Medical Physics
Biomedical and Life Sciences
Biophysics
Isomerism
Life Sciences
Models, Theoretical
Molecular Biology
Molecular Structure
Photochemical Processes
Pigments
Quantum Theory
Retina
Retina - chemistry
Rhodopsin - chemistry
Vitamin A - chemistry
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Summary:A quantum-classical model of photoisomerization of the visual pigment rhodopsin chromophore is proposed. At certain (and more realistic) parameter value combinations, the model is shown to accurately reproduce a number of independent experimental data on the photoreaction dynamics: the quantum yield, the time to reach the point of conical intersection of potential energy surfaces, the termination time of the evolution of quantum subsystem, as well as the characteristic low frequencies of retinal molecular lattice fluctuations during photoisomerization. In addition, the model behavior is in good accordance with experimental data about coherence and local character of quantum transition.
ISSN:1607-6729
1608-3091
DOI:10.1134/S1607672916060168