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Inorganic Fe2+ formation upon Fe-S protein thermodestruction in the membranes of thermophilic cyanobacteria: Mossbauer spectroscopy studyстатья
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: 18 июля 2013 г.
- Авторы: Kaurov Y.N., Novakova A.A., Davletshina L.N., Aleksandrova A.Y., Khval'kovskaya E.A., Semin B.K., Belevich N.P., Ivanov I.I., Rubin A.B.
- Журнал: FEBS Letters
- Том: 450
- Номер: 1-2
- Год издания: 1999
- Издательство: Elsevier BV
- Местоположение издательства: Netherlands
- Первая страница: 135
- Последняя страница: 138
- DOI: 10.1016/S0014-5793(99)00485-8
- Аннотация: A model description of the Mossbauer spectrum (80 K) of native membranes of the thermophilic cyanobacterium Synechococcus elongatus is suggested on the basis of the known values of quadrupole splitting (Delta E-Q) and isomer shift (delta(Fe)) for the iron-containing components of the photosynthetic apparatus, Using this approach, we found that heating the membranes at 70-80 K results in a decrease of doublet amplitudes belonging to F-X, F-A, F-B and ferredoxin and simultaneous formation of a new doublet with Delta E-Q = 3.10 mm/s and delta(Fe) = 1.28 mm/s, typical of inorganic hydrated forms of Fe2+, The inhibition of electron transfer via photosystem I to oxygen, catalyzed by ferredoxin, occurs within the same range of temperatures. The data demonstrate that the processes of thermoinduced Fe2+ formation and distortions in the photosystem I electron transport in the membranes are interrelated and caused mainly by the degradation of ferredoxin, The possible role of Fe2+ formation in the damage of the photosynthetic apparatus resulting from heating and the action of other extreme factors is discussed. (C) 1999 Federation of European Biochemical Societies.
- Добавил в систему: Иванов Илья Ильич