WDR26 is a new partner of Axin1 in the canonical Wnt signaling pathway
2016
The stability of β-catenin is very important for canonical Wnt signaling. A protein complex including Axin/APC/GSK3β phosphorylates β-catenin to be degraded by ubiquitination with β-TrCP. In the recent study, we isolated WDR26, a protein that binds to Axin. Here, we found that WDR26 is a negative regulator of the canonical Wnt signaling pathway, and that WDR26 affected β-catenin levels. In addition, WDR26/Axin binding is involved in the ubiquitination of β-catenin. These results suggest that WDR26 plays a negative role in β-catenin degradation in the Wnt signaling pathway.
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