Armadillo coactivates transcription driven by the product of the Drosophila segment polarity gene dTCF.

Journal Article (Journal Article)

The vertebrate transcription factors TCF (T cell factor) and LEF (lymphocyte enhancer binding factor) interact with beta-catenin and are hypothesized to mediate Wingless/Wnt signaling. We have cloned a maternally expressed Drosophila TCF family member, dTCF. dTCF binds a canonical TCF DNA motif and interacts with the beta-catenin homolog Armadillo. Previous studies have identified two regions in Armadillo required for Wingless signaling. One of these interacts with dTCF, while the other constitutes a transactivation domain. Mutations in dTCF and expression of a dominant-negative dTCF transgene cause a segment polarity phenotype and affect expression of the Wingless target genes engrailed and Ultrabithorax. Epistasis analysis positions dTCF downstream of armadillo. The Armadillo-dTCF complex mediates Wingless signaling as a bipartite transcription factor.

Full Text

Duke Authors

Cited Authors

  • van de Wetering, M; Cavallo, R; Dooijes, D; van Beest, M; van Es, J; Loureiro, J; Ypma, A; Hursh, D; Jones, T; Bejsovec, A; Peifer, M; Mortin, M; Clevers, H

Published Date

  • March 1997

Published In

Volume / Issue

  • 88 / 6

Start / End Page

  • 789 - 799

PubMed ID

  • 9118222

Electronic International Standard Serial Number (EISSN)

  • 1097-4172

International Standard Serial Number (ISSN)

  • 0092-8674

Digital Object Identifier (DOI)

  • 10.1016/s0092-8674(00)81925-x


  • eng