May act as Rab effector protein and play a role in vesicle trafficking (By similarity). Involved in apical-directed transport in polarized epithelial cells; the functions seems to implicate Rab8, BIN1 and possibly DNM1 (PubMed:26833786). Interacts with RAB8A, RAB8B, RAB10, RAB13 and RAB15 (in their GTP-bound forms); at least in case of RAB8A can bind 2 molecules of RAB8A simultaneously. Interacts with BIN1 and AMPH. Interacts with DNM1. The CAAX motif is a signal for prenylation and required for endosomal colocalization with Rab8 and Rab10. The bivalent Mical/EHBP Rab binding (bMERB) domain, mediates binding to Rab8, Rab10, Rab10, Rab13 and Rab15 (in their GTP-bound forms). Prenylated (Probable). Farnelysation (predominant) and geranylgeranylation has been observed in vitro.