Key structural component of the deuterosome, a structure that promotes de novo centriole amplification in multiciliated cells. Deuterosome-mediated centriole amplification occurs in terminally differentiated multiciliated cells and can generate more than 100 centrioles. Probably sufficient for the specification and formation of the deuterosome inner core. Interacts with CEP152 and recruits PLK4 to activate centriole biogenesis (By similarity). Interacts with CEP152; the interaction is mutually exclusive with CEP63. Localizes to the deuterosome. Belongs to the CEP63 family. Contaminating sequence. Potential poly-A sequence. The C-terminus was extended based on orthologous sequences.