GTPase that recruits MYO1E to MHC class II-containing vesicles via the effector protein ARL14EP and hence controls the movement of these vesicles along the actin cytoskeleton in dendritic cells. Interacts with ARL14EP. Colocalizes with MHC II-containing cytoplasmic vesicles. Belongs to the small GTPase superfamily. Arf family.