Member of the machinery of polarized transport. Required for the indirect transcytotic route at the step of the egress of the transcytosing cargo from perinuclear endosomes in order for it to travel to the apical surface via a raft-dependent pathway (By similarity). Interacts with TPD52L2. Associated with lipid rafts. In polarized epithelial cells, restricted to the apical surface (By similarity). Belongs to the MAL family.