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State of the phycobilisome determines effective absorption cross-section of Photosystem II in Synechocystis sp. PCC 6803статья
Статья опубликована в высокорейтинговом журнале
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: 24 ноября 2021 г.
- Авторы: Protasova Elena A., Antal Taras K., Zlenko Dmitry V., Elanskaya Irina V., Lukashev Evgeny P., Friedrich Thomas, Mironov Kirill S., Sluchanko Nikolai N., Ge Baosheng, Qin Song, Maksimov Eugene G.
- Журнал: Biochimica et Biophysica Acta - Bioenergetics
- Год издания: 2021
- Издательство: Elsevier BV
- Местоположение издательства: Netherlands
- Номер статьи: 148494
- DOI: 10.1016/j.bbabio.2021.148494
- Аннотация: Quenching of excess excitation energy is necessary for the photoprotection of light-harvesting complexes. In cyanobacteria, quenching of phycobilisome (PBS) excitation energy is induced by the Orange Carotenoid Protein (OCP), which becomes photoactivated under high light conditions. A decrease in energy transfer efficiency from the PBSs to the reaction centers decreases photosystem II (PS II) activity. However, quantitative analysis of OCP-induced photoprotection in vivo is complicated by similar effects of both photochemical and non-photochemical quenching on the quantum yield of the PBS fluorescence overlap with the emission of chlorophyll. In the present study, we have analyzed chlorophyll a fluorescence induction to estimate the effective cross-section of PS II and compared the effects of reversible OCP-dependent quenching of PBS fluorescence with reduction of PBS content upon nitrogen starvation or mutations of key PBS components. This approach allowed us to estimate the dependency of the rate constant of PS II primary electron acceptor reduction on the amount of PBSs in the cell. We found that OCP-dependent quenching triggered by blue light affects approximately half of PBSs coupled to PS II, indicating that under normal conditions, the concentration of OCP is not sufficient for quenching of all PBSs coupled to PS II.
- Добавил в систему: Протасова Елена Александровна
Прикрепленные файлы
| № | Имя | Описание | Имя файла | Размер | Добавлен |
|---|---|---|---|---|---|
| 1. | Полный текст | Полный текст | 1-s2.0-S0005272821001274-main.pdf | 5,1 МБ | 24 октября 2022 [emaksimoff] |