| Literature DB >> 9488439 |
V Korinek1, N Barker, K Willert, M Molenaar, J Roose, G Wagenaar, M Markman, W Lamers, O Destree, H Clevers.
Abstract
Tcf transcription factors interact with beta-catenin and Armadillo to mediate Wnt/Wingless signaling. We now report the characterization of genes encoding two murine members of the Tcf family, mTcf-3 and mTcf-4. mTcf-3 mRNA is ubiquitously present in embryonic day 6.5 (E6.5) mouse embryos but gradually disappears over the next 3 to 4 days. mTcf-4 expression occurs first at E10.5 and is restricted to di- and mesencephalon and the intestinal epithelium during embryogenesis. The mTcf-3 and mTcf-4 proteins bind a canonical Tcf DNA motif and can complex with the transcriptional coactivator beta-catenin. Overexpression of Wnt-1 in a mammary epithelial cell line leads to the formation of a nuclear complex between beta-catenin and Tcf proteins and to Tcf reporter gene transcription. These data demonstrate a direct link between Wnt stimulation and beta-catenin/Tcf transcriptional activation and imply a role for mTcf-3 and -4 in early Wnt-driven developmental decisions in the mouse embryo.Entities:
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Year: 1998 PMID: 9488439 PMCID: PMC108837 DOI: 10.1128/MCB.18.3.1248
Source DB: PubMed Journal: Mol Cell Biol ISSN: 0270-7306 Impact factor: 4.272