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. Localizes to the proximal ends of the centrioles. Levels are high at interphase centrosomes but are reduced on mitotic spindle poles. Phosphorylated directly or indirectly by NEK2. Contaminating sequence. Potential poly-A sequence.