Plays an important role in cell division and centrosome function by participating in centriole duplication (, ). Inhibits microtubule nucleation from the centrosome. Involved in the regulation of slow processive growth of centriolar microtubules. Acts as a microtubule plus-end tracking protein that stabilizes centriolar microtubules and inhibits microtubule polymerization and extension from the distal ends of centrioles ( ). Required for centriole elongation and for STIL-mediated centriole amplification . Required for the recruitment of CEP295 to the proximal end of new-born centrioles at the centriolar microtubule wall during early S phase in a PLK4-dependent manner . May be involved in the control of centriolar-microtubule growth by acting as a regulator of tubulin release .
Subcellular locations: Cytoplasm, Cytoskeleton, Microtubule organizing center, Centrosome, Cytoplasm, Cytoskeleton, Microtubule organizing center, Centrosome, Centriole
Localized within the center of microtubule asters . During centriole biogenesis, it is concentrated within the proximal lumen of both parental centrioles and procentrioles .