Pleiotropic regulator of centriole duplication, mitosis, and ciliogenesis. Critical interface between centrosome and microtubule-mediated cellular processes. Centriole duplication protein required for recruitment of CEP63, CEP152, and PLK4 to the centrosome. Independent of its centrosomal targeting, localizes to and interacts with microtubules and regulates microtubule nucleation, stability, and mitotic progression. Interacts with CEP63; the interaction is required for their location to proximal end of centrioles (PubMed:32402286). Interacts with microtubules (PubMed:32402286). Localizes to resolvable rings at the proximal end of centrioles (PubMed:32402286). In mitotic cells, localizes to spindle microtubules during metaphase (PubMed:32402286). Aberrant splicing.