6533b831fe1ef96bd12984d6
RESEARCH PRODUCT
Elucidation of the regulation of an adult cuticle gene Acp65A by the transcription factor Broad.
H.-y. CuiMatthieu LestradetLynn M. RiddifordN. Bruey-sedanoJean-philippe Charlessubject
Gene isoformHot TemperatureMutantResponse elementMolecular Sequence DataGene expressionGeneticsAnimalsDrosophila ProteinsPromoter Regions GeneticMolecular BiologyGeneTranscription factorBinding SitesbiologyBase SequencePupaGene Expression Regulation Developmentalbiology.organism_classificationMolecular biologyDrosophila melanogasterInsect ScienceInsect ProteinsDrosophila melanogasterIntegumentary SystemDrosophila ProteinProtein BindingTranscription Factorsdescription
Broad (BR), an ecdysone-inducible transcription factor, is a major determinant of the pupal stage. The misexpression of BR-Z1 isoform (BR-Z1) during adult development of Drosophila melanogaster prevents the expression of the adult cuticle protein 65A gene (Acp65A). We found that the proximal 237 bp of the 5' flanking region of Acp65A were sufficient to mediate this suppression. A targeted point mutation of a putative BR-Z1 response element (BRE) within this region showed that it was not involved. Drosophila hormone receptor-like 38 (DHR38) is required for Acp65A expression. We found that BR-Z1 repressed DHR38 expression and that BR's inhibition of Acp65A expression was rescued by exogenous expression of DHR38. Thus, BR-Z1 suppresses Acp65A expression by preventing the normal up-regulation of DHR38 at the time of adult cuticle formation.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2009-08-01 | Insect molecular biology |