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- W2040804282 abstract "A number of transcription factors contain so-called zinc finger domains for the interaction with their cognate DNA sequence. It has been shown that removal of the zinc ions complexed in these zinc fingers abrogates DNA binding and transcription activation. Therefore we wanted to test the hypothesis that the activity of transcription factors could be regulated by physiological chelators of zinc. A prominent candidate for such a chelator is the Cys-rich protein thionein (apometallothionein) that is inducible by heavy metal loads, and by other environmental stimuli. Here we show with DNA binding and in vitro transcriptions assays that thionein indeed can inactive the zinc finger-containing Spl in a reversible manner. By contrast, transcription factor Oct-l, which binds DNA via a homeo-domain, i.e. a helix-turn-helix motif not involving zinc ions, is refractory to thionein action. We propose that modulation of intracellular thionein concentration is used for the coordinated regulation of a large subset of genes whose transcription depends on zinc finger proteins." @default.
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- W2040804282 date "1991-02-25" @default.
- W2040804282 modified "2023-10-04" @default.
- W2040804282 title "Thionein (apometallothionein) can modulate DNA binding and transcription activation by zinc finger containing factor Spl" @default.
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- W2040804282 doi "https://doi.org/10.1016/0014-5793(91)80175-3" @default.
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