Spectral Diﬀerences between Monomers and Trimers of Photosystem I Depend on the Interaction between Peripheral Chlorophylls of Neighboring Monomers in Trimer

Pishchalnikov, R.Y.; Shubin, V.V.; Razjivin, A.P.

Статья опубликована в журнале из списка RSCI Web of Science

Информация о цитировании статьи получена из Web of Science, Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 17 октября 2017 г.

Авторы: Pishchalnikov R.Yu, Shubin V.V., Razjivin A.P.
Журнал: Physics of Wave Phenomena
Том: 25
Номер: 3
Год издания: 2017
Издательство: Allerton Press Inc.
Местоположение издательства: United States
Первая страница: 185
Последняя страница: 195
DOI: 10.3103/S1541308X17030050
Аннотация: The spatial position of the long-wavelength chlorophylls in trimer of pigment-protein complex of photosystem I (PSI) have been determined by modeling the optical ﬂuorescence absorption and emission spectra for two hypothetical models of PSI trimer. The calculation has been performed using X-ray diﬀraction data on the spatial position of chlorophylls in PSI monomer; the pigment site energies were taken from the studies of other researchers, while interactions between monomers in trimer are considered as ﬁtting parameters. The interaction energy between the chlorophylls spaced by a distance smaller than 10 A˚ was estimated based on the concept of extended dipole−dipole interaction. The model under study allowed us to evaluate the inﬂuence of the exciton interaction between peripheral pigments on the optical response of PSI trimer. The intensity and shape of stationary ﬂuorescence line turned out to be sensitive to the PSI monomer packing in trimer. A visualization of the density matrix for low-energy exciton states has made it possible to estimate the localization of long-wavelength chlorophylls in PSI trimer.
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Spectral Diﬀerences between Monomers and Trimers of Photosystem I Depend on the Interaction between Peripheral Chlorophylls of Neighboring Monomers in Trimerстатья

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