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Mech Dev. 2000 Mar 1;91(1-2):249-58.

Brachyury is a target gene of the Wnt/beta-catenin signaling pathway.

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Max-Planck Institut für Immunbiologie, Stübeweg 51, D-79108, Freiburg, Germany.


To identify target genes of the Wnt/beta-catenin signaling pathway in early mouse embryonic development we have established a co-culture system consisting of NIH3T3 fibroblasts expressing different Wnts as feeder layer cells and embryonic stem (ES) cells expressing a green fluorescent protein (GFP) reporter gene transcriptionally regulated by the TCF/beta-catenin complex. ES cells specifically respond to Wnt signal as monitored by GFP expression. In GFP-positive ES cells we observe expression of Brachyury. Two TCF binding sites located in a 500 bp Brachyury promoter fragment bind the LEF-1/beta-catenin complex and respond specifically to beta-catenin-dependent transactivation. From these results we conclude that Brachyury is a target gene for Wnt/beta-catenin signaling.

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