The function of RAB11FIP5 (RAB11 family interacting protein 5, Ensembl gene identifier ENSG00000135631) is as follows. Rab effector involved in protein trafficking from apical recycling endosomes to the apical plasma membrane. Involved in insulin granule exocytosis. May regulate V-ATPase intracellular transport in response to extracellular acidosis. {ECO:0000269|PubMed:11163216, ECO:0000269|PubMed:20717956}.