Flexible phase adjustment of circadian albumin D site-binding protein (Dbp) gene expression by CRYPTOCHROME1
- Stratmann, Markus Department of Molecular Biology, University of Geneva, Switzerland
- Stadler, Frédéric Department of Medicine, Unit of Biochemistry, University of Fribourg, Switzerland
- Tamanini, Filippo Department of Genetics, Erasmus University Medical Center, Rotterdam, The Netherlands
- Horst, Gijsbertus T.J. van der Department of Genetics, Erasmus University Medical Center, Rotterdam, The Netherlands
- Ripperger, Jürgen A. Department of Medicine, Unit of Biochemistry, University of Fribourg, Switzerland
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2010
Published in:
- Genes & Development. - 2010, vol. 24, p. 1317-1328
English
The albumin D site-binding protein (DBP) governs circadian transcription of a number of hepatic detoxification and metabolic enzymes prior to the activity phase and subsequent food intake of mice. However, the behavior of mice is drastically affected by the photoperiod. Therefore, continuous adjustment of the phase of circadian Dbp expression is required in the liver. Here we describe a direct impact of CRYPTOCHROME1 (CRY1) on the phase of Dbp expression. Dbp and the nuclear receptor Rev-Erbα are circadian target genes of BMAL1 and CLOCK. Surprisingly, dynamic CRY1 binding to the Dbp promoter region delayed BMAL1 and CLOCK-mediated transcription of Dbp compared with Rev-Erbα. Extended presence of CRY1 in the nucleus enabled continuous uncoupling of the phase of Dbp from Rev-Erbα expression upon change from short to longer photoperiods. CRY1 thus maintained the peak of DBP accumulation close to the activity phase. In contrast, Rev-Erbα expression was phase-locked to the circadian oscillator and shaped by accumulation of its own gene product. Our data indicate that fine-tuning of circadian transcription in the liver is even more sophisticated than expected.
- Faculty
- Faculté des sciences et de médecine
- Department
- Département de Biologie
- Language
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- English
- Classification
- Biological sciences
- License
- License undefined
- Identifiers
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- RERO DOC 20260
- DOI 10.1101/gad.578810
- Persistent URL
- https://folia.unifr.ch/unifr/documents/301633
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