Positively regulates the Wnt signaling pathway by stabilizing beta-catenin through the association with GSK-3. May play a role in tumor progression and collaborate with PIM1 and MYC in lymphomagenesis. Binds DVL1. Binds GSK-3 and prevent GSK-3-dependent phosphorylation. Phosphorylated. Belongs to the GSK-3-binding protein family.