Required for organization of the cellular microtubule array and microtubule anchoring at the centrosome. Positively regulates the activity of the minus-end directed microtubule motor protein dynein. May enhance dynein-mediated microtubule sliding by targeting dynein to the microtubule plus end. Positively regulates lysosome peripheral distribution and ruffled border formation in osteoclasts. Localizes to the interphase centrosome and the mitotic spindle. Phosphorylated in mitosis. Belongs to the nudE family.