Required for centrosome duplication. Plays a central role in determining centrosome size. Interacts with hyls-1; leading to hyls-1 localization into newly forming centrioles. Localizes to the centrosome throughout the cell cycle. Localizes to a tiny dot in the center of centrosome. Recruited to the centrosome once per cell cycle, at the time of organelle duplication and remains stably associated after. Localizes to centrosomes both in sperm and in the syncytial part of the gonad. Staining in the gonad disappears as the meiotic nuclei cellularizes to form oocytes, presumably marking the point at which the centrioles are lost during oogenesis. In newly fertilized embryos, it is localized to a discrete spot near the sperm-derived pronucleus. Then, it remains attached to the centrosome throughout the rest of development.