RRC ID 21885
Author Itoh TQ, Tanimura T, Matsumoto A.
Title Membrane-bound transporter controls the circadian transcription of clock genes in Drosophila.
Journal Genes Cells
Abstract Little is known about molecular mechanisms that control the Drosophila circadian clock beyond the transcriptional-translational feedback regulation of clock genes as an intracellular process. In this study, Early gene at 23 (E23) was identified as a novel clock gene that encodes the membrane-bound ABC transporter that is induced by the molting hormone ecdysone. E23 expresses in pacemaker neurons in fly head, and its knockdown flies lengthened circadian period with an increased expression of the clock gene vrille. E23 and vrille responded to both ecdysone and clock signals, whereas E23 protein specifically suppressed the ecdysone response and is necessary for rhythmicity. Thus, E23 forms its own feedback loop in the ecdysone response to control circadian oscillation through ecdysone-mediated vrille expression. The ecdysone signaling pathway with E23 is essential not only in developmental stage but also for the circadian behavior in adult fly.
Volume 16(12)
Pages 1159-67
Published 2011-12-1
DOI 10.1111/j.1365-2443.2011.01559.x
PMID 22077638
MeSH ATP-Binding Cassette Transporters* / genetics ATP-Binding Cassette Transporters* / metabolism Animals Animals, Genetically Modified Biological Clocks / drug effects Biological Clocks / physiology* Cell Membrane / genetics Cell Membrane / metabolism Cells, Cultured Circadian Rhythm / drug effects Circadian Rhythm / physiology* Drosophila Proteins / genetics Drosophila Proteins / metabolism* Drosophila melanogaster / drug effects Drosophila melanogaster / genetics Drosophila melanogaster / metabolism* Ecdysone / metabolism Ecdysone / pharmacology* Feedback, Physiological / physiology* Gene Expression Regulation / drug effects Gene Knockdown Techniques Genes, Reporter Luciferases / analysis Neurons / cytology Neurons / drug effects Neurons / metabolism* Signal Transduction / physiology Transcription Factors / genetics Transcription Factors / metabolism*
IF 1.922
Times Cited 20