Keratin-binding protein required for epithelial cell polarization. Involved in apical junction complex (AJC) assembly via its interaction with PARD3. Required for ciliogenesis (By similarity). Interacts with PARD3 (By similarity). May interact with FAS cytoplasmic domain (By similarity). Interacts with TRAPPC14 (By similarity). Localizes specifically to the distal appendage region of the centriole, which anchors the mother centriole to the plasma membrane. Localizes to the apical junction complex (AJC) in epithelial cells (By similarity). Broadly expressed.