Regulation of per and cry genes reveals a central role for the D-box enhancer in light-dependent gene expression
Light serves as a key environmental signal for synchronizing the circadian clock with the day night cycle. The zebrafish represents an attractive model for exploring how light influences the vertebrate clock mechanism. Direct illumination of most fish tissues and cell lines induces expression of a b...
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| Main Authors: | , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
December 2012
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| In: |
PLOS ONE
Year: 2012, Volume: 7, Issue: 12 |
| ISSN: | 1932-6203 |
| DOI: | 10.1371/journal.pone.0051278 |
| Online Access: | Verlag, kostenfrei, Volltext: http://dx.doi.org/10.1371/journal.pone.0051278 Verlag, kostenfrei, Volltext: http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0051278 
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| Author Notes: | Philipp Mracek, Cristina Santoriello, M. Laura Idda, Cristina Pagano, Zohar Ben-Moshe, Yoav Gothilf, Daniela Vallone, Nicholas S. Foulkes |
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| 245 | 1 | 0 | |a Regulation of per and cry genes reveals a central role for the D-box enhancer in light-dependent gene expression |c Philipp Mracek, Cristina Santoriello, M. Laura Idda, Cristina Pagano, Zohar Ben-Moshe, Yoav Gothilf, Daniela Vallone, Nicholas S. Foulkes |
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| 520 | |a Light serves as a key environmental signal for synchronizing the circadian clock with the day night cycle. The zebrafish represents an attractive model for exploring how light influences the vertebrate clock mechanism. Direct illumination of most fish tissues and cell lines induces expression of a broad range of genes including DNA repair, stress response and key clock genes. We have previously identified D- and E-box elements within the promoter of the zebrafish per2 gene that together direct light-induced gene expression. However, is the combined regulation by E- and D-boxes a general feature for all light-induced gene expression? We have tackled this question by examining the regulation of additional light-inducible genes. Our results demonstrate that with the exception of per2, all other genes tested are not induced by light upon blocking of de novo protein synthesis. We reveal that a single D-box serves as the principal light responsive element within the cry1a promoter. Furthermore, upon inhibition of protein synthesis D-box mediated gene expression is abolished while the E-box confers light driven activation as observed in the per2 gene. Given the existence of different photoreceptors in fish cells, our results implicate the D-box enhancer as a general convergence point for light driven signaling. | ||
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