Membrane-associated guanylate kinase, WW and PDZ domain-containing protein 3 (Magi3)

Acts as a scaffolding protein in cell-cell junctions, thereby regulating various cellular and signaling procedures. Cooperates with PTEN to modulate the kinase activity of AKT1.

Its interaction with PTPRB and tyrosine phosphorylated proteins suggests that it may connect receptor tyrosine phosphatase with its substrates in the plasma membrane. In polarized epithelial cells, involved in effective trafficking of TGFA to the cell surface.