Plays a role in neurogenesis and neuronal migration. Necessary for correct formation of mitotic spindles and chromosome separation during mitosis. Necessary for cytokinesis and cell proliferation (By similarity). In a filamentous pattern adjacent to the nucleus of migrating cerebellar granule cells. Colocalizes with tubulin and dynein and with the microtubule organizing center. Distributed throughout the cytoplasm of non-migrating cells (By similarity). Localizes to the mitotic spindle in a EML4-dependent manner (By similarity). Reversibly phosphorylated on serine residues during the M phase of the cell cycle. Phosphorylation is necessary for correct formation of mitotic spindles and chromosome separation during mitosis (By similarity). Belongs to the nudC family.