Wnt/Wingless Signaling Requires BCL9/Legless-Mediated Recruitment of Pygopus to the Nuclear β-Catenin-TCF Complex

详细信息    查看全文

• 作者：Thomas Kramps ; Oliver Peter ; Erich Brunner ; Denise Nellen ; Barbara Froesch ; Sandipan Chatterjee ; Maximilien Murone ; Stephanie Zü ; llig and Konrad Basler
• 刊名：Cell
• 出版年：2002
• 出版时间：5 April 2002
• 年：2002
• 卷：109
• 期：1
• 页码：47-60
• 全文大小：833 K

文摘

Wnt/Wingless signaling controls many fundamental processes during animal development. Wnt transduction is mediated by the association of β-catenin with nuclear TCF DNA binding factors. Here we report the identification of two segment polarity genes in Drosophila, legless (lgs), and pygopus (pygo), and we show that their products are required for Wnt signal transduction at the level of nuclear β-catenin. Lgs encodes the homolog of human BCL9, and we provide genetic and molecular evidence that these proteins exert their function by physically linking Pygo to β-catenin. Our results suggest that the recruitment of Pygo permits β-catenin to transcriptionally activate Wnt target genes and raise the possibility that a deregulation of these events may play a causal role in the development of B cell malignancies.