May be involved in ciliogenesis. Probably plays an important role in centrosome cohesion during interphase. Monomer and homodimer (Probable). Forms a complex in vitro with both NEK2 kinase and the PPP1CC catalytic subunit of protein phosphatase 1 (PP1) (By similarity). Interacts with CEP135 (By similarity). Interacts with CROCC/rootletin (PubMed:16339073). Interacts with CNTLN (By similarity). Interacts with NIN (via C-terminus) (PubMed:27565344). Component of the core centrosome where it is found at the proximal ends of centrioles. Expressed in the retina. C-terminal part is phosphorylated by NEK2. Dephosphorylated in vitro by the PP1 phosphatase (By similarity).