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- W2135671499 abstract "The expression of many genes of facultatively photosynthetic bacteria of the genus Rhodobacter is controlled by the oxygen tension. Among these are the genes of the puf and puc operons, which encode proteins of the photosynthetic apparatus. Previous results revealed that thioredoxins are involved in the regulated expression of these operons, but it remained unsolved as to the mechanisms by which thioredoxins affect puf and puc expression. Here we show that reduced TrxA of Rhodobacter capsulatus and Rhodobacter sphaeroides and oxidized TrxC of R.capsulatus interact with DNA gyrase and alter its DNA supercoiling activity. While TrxA enhances supercoiling, TrxC exerts a negative effect on this activity. Furthermore, inhibition of gyrase activity strongly reduces puf and puc expression. Our results reveal a new signaling pathway by which oxygen can affect the expression of bacterial genes." @default.
- W2135671499 created "2016-06-24" @default.
- W2135671499 creator A5046930369 @default.
- W2135671499 date "2004-08-18" @default.
- W2135671499 modified "2023-10-16" @default.
- W2135671499 title "Thioredoxin can influence gene expression by affecting gyrase activity" @default.
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- W2135671499 doi "https://doi.org/10.1093/nar/gkh794" @default.
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