title: The CREB-binding protein affects the circadian regulation of behaviour.
abstract: Rhythmic changes in light and temperature conditions form the primary environmental cues that synchronize the molecular circadian clock of most species with the external cycles of day and night. Previous studies established a role for the CREB-binding protein (CBP) in molecular clock function by coactivation of circadian transcription. Here, we report that moderately increased levels of CBP strongly dampen circadian behavioural rhythms without affecting molecular oscillations of circadian transcription. Interestingly, light-dark cycles as well as high temperature facilitated a circadian control of behavioural activity. Based on these observations we propose that in addition to its coactivator function for circadian transcription, CBP is involved in the regulation of circadian behaviour down-stream of the circadian clock.
authors.affiliation: Biochemistry Center Heidelberg, University of Heidelberg, Germany.
authors.forename: Christian
authors.initials: C
authors.lastname: Maurer
authors.affiliation: Biochemistry Center Heidelberg, University of Heidelberg, Germany.
authors.forename: Tobias
authors.initials: T
authors.lastname: Winter
authors.affiliation: Biochemistry Center Heidelberg, University of Heidelberg, Germany.
authors.forename: Siwei
authors.initials: S
authors.lastname: Chen
authors.affiliation: Biochemistry Center Heidelberg, University of Heidelberg, Germany.
authors.forename: Hsiu-Cheng
authors.initials: HC
authors.lastname: Hung
authors.affiliation: Biochemistry Center Heidelberg, University of Heidelberg, Germany. Frank.Weber@bzh.uni-heidelberg.de.
authors.forename: Frank
authors.initials: F
authors.lastname: Weber
mesh_terms: D000818:Animals; D056926:CLOCK Proteins / Q000235:genetics / Q000378:metabolism; D050882:CREB-Binding Protein / Q000235:genetics / Q000378:metabolism*; D002940:Circadian Rhythm / Q000235:genetics*; D004330:Drosophila / Q000235:genetics / Q000378:metabolism* / Q000502:physiology; D029721:Drosophila Proteins / Q000235:genetics / Q000378:metabolism
chemical_list: C120526:Clk protein, Drosophila; D029721:Drosophila Proteins; D056926:CLOCK Proteins; D050882:CREB-Binding Protein
keywords: CLOCK/CYCLE; CREB-binding protein; Drosophila; behaviour; circadian rhythms