An analysis using the hobo genetic system reveals that combinatorial signaling by the dpp and wg pathways regulates dpp expression in leading edge cells of the dorsal ectoderm in Drosophila melanogaster

Stuart Newfeld, N. T. Takaesu

Research output: Contribution to journalArticle

9 Scopus citations

Abstract

Our laboratory has contributed to the development of a genetic system based upon the hobo transposable element in Drosophila melanogaster. We recently reported that hobo, like the better-known P element, is capable of local transposition. In that study, we mobilized a hobo enhancer trap vector and generated two unique alleles of decapentaplegic (dpp), a transforming growth factor-β family member with numerous roles during development. Here we report a detailed study of one of those alleles (dppF11). To our knowledge, this is the first application of the hobo genetic system to understanding developmental processes. First, we demonstrate that lacZ expression from the dppF11 enhancer trap accurately reflects dpp mRNA accumulation in leading edge cells of the dorsal ectoderm. Then we show that combinatorial signaling by the Wingless (Wg) pathway, the Dpp pathway, and the transcriptional coactivator Nejire (CBP/p300) regulates dppF11 expression in these cells. Our analysis of dppF11 suggests a model for the integration of Wg and Dpp signals that may be applicable to other developmental systems. Our analysis also illustrates several new features of the hobo genetic system and highlights the value of hobo, as an alternative to P, in addressing developmental questions.

Original languageEnglish (US)
Pages (from-to)685-692
Number of pages8
JournalGenetics
Volume161
Issue number2
StatePublished - Jul 10 2002

ASJC Scopus subject areas

  • Genetics

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