LRP6 (low-density lipoprotein receptor-related protein 6) is a single span transmembrane Wnt receptor that interacts with Axin to promote the Wnt-dependent accumulation of beta-catenin. Cells treated with Wnt quickly induce plasma membrane-associated LRP6 aggregates. The aggregates are phosphorylated, and then promote Axin recruitment and beta-catenin stabilization. LRP6 is internalized with caveolin and components of this endocytic pathway are required not only for Wnt-3a-induced internalization of LRP6 but also for accumulation of beta-catenin (1-2).
Wnt Signaling Pathway
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