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- W2141954811 abstract "Abstract We investigated the role of the redox state of the photosynthetic and respiratory electron transport chains on the regulation ofpsbA expression in Synechocystis PCC 6803. Different means to modify the redox state of the electron carriers were used: (a) dark to oxidize the whole electron transport chain; (b) a shift from dark to light to induce its reduction; (c) the chemical interruption of the electron flow at different points to change the redox state of specific electron carriers; and (d) the presence of glucose to maintain a high reducing power in darkness. We show that changes in the redox state of the intersystem electron transport chain induce modifications of psbA transcript production and psbA mRNA stability. Reduction of the intersystem electron carriers activates psbAtranscription and destabilizes the mRNA, while their oxidation induces a decrease in transcription and a stabilization of the transcript. Furthermore, our data suggest that the redox state of one of the electron carriers between the plastoquinone pool and photosystem I influences not only the expression of the psbA gene, but also that of other two photosynthetic genes, psaE andcpcBA. As a working hypothesis, we propose that the occupancy of the Q0 site in the cytochromeb 6/f complex may be involved in this regulation." @default.
- W2141954811 created "2016-06-24" @default.
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- W2141954811 date "2000-02-01" @default.
- W2141954811 modified "2023-09-30" @default.
- W2141954811 title "Redox Control of <i>psbA</i> Gene Expression in the Cyanobacterium <i>Synechocystis</i> PCC 6803. Involvement of the Cytochrome <i>b6/f</i>Complex" @default.
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- W2141954811 doi "https://doi.org/10.1104/pp.122.2.505" @default.
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