NDLI: BHLH-ORANGE family genes regulate the expression of E-box clock genes in Drosophila

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BHLH-ORANGE family genes regulate the expression of E-box clock genes in Drosophila

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Applied Entomology and Zoology : Volume 46, Issue 2, May 2011

Applied Entomology and Zoology : Volume 46, Issue 1, February 2011

BHLH-ORANGE family genes regulate the expression of E-box clock genes in Drosophila

Content Provider	Springer Nature Link
Author	Itoh, Taichi Q. Tanimura, Teiichi Matsumoto, Akira
Copyright Year	2011
Abstract	Drosophila has 13 basic helix-loop-helix-ORANGE (bHLH-O) family genes. One of the members, clockwork orange (cwo), which is the counterpart of mammalian clock genes Dec1 and Dec2, regulates the transcriptional feedback loops of circadian clock genes through binding to E-box sequences in target gene promoters. The goal of the current study was to determine the role of Drosophila bHLH-O proteins in circadian rhythms at the molecular and behavioral level. Promoter assays in cultured Drosophila S2 cells were carried out to investigate which of the known bHLH-O proteins directly regulates the transcription of clock genes. In addition to CWO, three other bHLH-O proteins, SIDE, Mβ and Mγ, suppressed E-box clock gene transcription in vitro. RNA interference (RNAi) was used to generate bHLH-O knockdown flies in pacemaker neurons, and then locomotor activity rhythm was measured. cwo knockdown flies exhibited a remarkable phenotype. To clarify the functional complementation in circadian regulation among CWO, SIDE, Mβ and Mγ, promoter activity in the presence of combinations of two bHLH-O genes and locomotor rhythm in double knockdown flies were examined. The results suggest that CWO predominantly acts as a key factor of circadian regulation both in vitro and in vivo.
Starting Page	391
Ending Page	397
Page Count	7
File Format	PDF
ISSN	00036862
Journal	Applied Entomology and Zoology
Volume Number	46
Issue Number	3
e-ISSN	1347605X
Language	English
Publisher	Springer Japan
Publisher Date	2011-05-26
Publisher Place	Japan
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Drosophila Circadian rhythm Clockwork orange Basic helix-loop-helix-ORANGE Applied Ecology Agriculture Entomology Plant Pathology Environmental Management Zoology
Content Type	Text
Resource Type	Article
Subject	Insect Science

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