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Citation
von Kalm, L., Crossgrove, K., von Seggern, D., Guild, G.M., Beckendorf, S.K. (1994). The Broad-Complex directly controls a tissue-specific response to the steroid hormone ecdysone at the onset of Drosophila metamorphosis.  EMBO J. 13(15): 3505--3516.
FlyBase ID
FBrf0075097
Publication Type
Research paper
Abstract

In Drosophila, all of the major metamorphic transitions are regulated by changes in the titer of the steroid hormone ecdysone. Here we examine how a key regulator of metamorphosis and primary ecdysone response gene, the Broad-Complex, transmits the hormonal signal to one of its targets, the Sgs-4 glue gene. We show that Broad-Complex RNAs accumulate in mid third instar larval salivary glands prior to Sgs-4 induction, as expected for the products of a gene that regulates the timing of Sgs-4 activation. The Broad-Complex codes for a family of zinc finger transcriptional regulators. We have identified a number of binding sites for these proteins in sequences known to regulate the timing of Sgs-4 induction, and have used these sites to derive a binding consensus for each protein. Some of these binding sites are required in vivo for Sgs-4 activity. In addition, rbp+, a genetically defined Broad-Complex function that is required for Sgs-4 induction, acts through these Broad-Complex binding sites. Thus, the Broad-Complex directly mediates a temporal and tissue-specific response to ecdysone as larvae become committed to metamorphosis.

PubMed ID
PubMed Central ID
PMC395254 (PMC) (EuropePMC)
DOI
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Secondary IDs
  • FBrf0083550
Language of Publication
English
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Parent Publication
Publication Type
Journal
Abbreviation
EMBO J.
Title
The EMBO Journal
Publication Year
1982-
ISBN/ISSN
0261-4189
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