Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10799236 | Biochimica et Biophysica Acta (BBA) - Gene Regulatory Mechanisms | 2013 | 10 Pages |
Abstract
GAGA is a highly conserved Drosophila transcription factor encoded by the Trithorax-like (Trl) gene. While GAGA usually activates transcription, it represses its own promoter. Here we show that GAGA-mediated repression of Trl is conserved between two distant Drosophila species. A detailed promoter study showed that GAGA repressive activity can't be attributed to any discrete element in the Trl promoter. Genome-wide analysis of the transcriptome in S2 cells indicated that repression of Trl is very likely unique, being GAGA factor a transactivator for all the other promoters. Taken together, our results suggest a new mechanism to explain GAGA-mediated repression that involves a dose-dependent change in the architecture of the Trl promoter.
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Authors
David Piñeyro, Marta Blanch, Martà Badal, Ana Kosoy, Jordi Bernués,