Abstract
THE cytoplasmic proteins β-catenin of vertebrates and armadillo of Drosophila have two functions: they link the cadherin cell-adhesion molecules to the cytoskeleton1–4, and they participate in the wnt/wingless signalling pathway5–7. Here we show, in a yeast two-hybrid screen, that the architectural transcription factor LEF-1 (for lymphoid enhancer-binding factor)8–10 interacts with β-catenin. In mammalian cells, coexpressed LEF-1 and β-catenin form a complex that is localized to the nucleus and can be detected by immunoprecipitation. Moreover, LEF-1 and β-catenin form a ternary complex with DNA that displays an altered DNA bend. Microinjection of LEF-1 into Xenopus embryos induces axis duplication, which is augmented by interaction with β-catenin. Thus β-catenin regulates gene expression by direct interaction with transcription factors such as LEF-1, providing a molecular mechanism for the transmission of signals from cell-adhesion components or wnt protein to the nucleus.
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Behrens, J., von Kries, J., Kühl, M. et al. Functional interaction of β-catenin with the transcription factor LEF-1. Nature 382, 638–642 (1996). https://doi.org/10.1038/382638a0
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DOI: https://doi.org/10.1038/382638a0