Required for centrosome cohesion and recruitment of CEP68 to centrosomes. Interacts with CEP250 and CEP68. Interacts with NEK2; the interaction leads to phosphorylation of CNTLN. Colocalizes with gamma-tubulin during interphase and mitosis. Appears to associate with the mother centriole during G1 phase and with daughter centrioles towards G1/S phase (By similarity). Localizes to the proximal ends of the centrioles (PubMed:24554434). Levels are high at interphase centrosomes but are reduced on mitotic spindle poles (PubMed:24554434). Phosphorylated directly or indirectly by NEK2. Truncated N-terminus. Truncated N-terminus.