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p120-catenin is an Arm repeat protein that interacts with varied components such as cadherin, small G proteins, kinases, and the Kaiso transcriptional repressor. Despite recent advances in understanding the roles that p120-catenin and Kaiso play in downstream modulation of Wnt/β-catenin signaling, the identity of the upstream regulators of the p120-catenin/Kaiso pathway have remained unclear. Here,...
β-catenin-dependent or canonical Wnt signals are fundamental in animal development and tumor progression. Using Xenopus laevis, we report that the BTB/POZ zinc finger family member Kaiso directly represses canonical Wnt gene targets (Siamois, c-Fos, Cyclin-D1, and c-Myc) in conjunction with TCF/LEF (TCF). Analogous to β-catenin relief of TCF repressive activity, we show that p120-catenin relieves...
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