Plays a role in microtubule organization. Required for centriole subdistal appendage assembly. Interacts with CCDC68 and CCDC120; leading to recruitment to centrosomes (By similarity). Interacts with PLK1 (By similarity). Interacts with NIN (PubMed:27565344). Interacts with FHDC1 (PubMed:29742020). Interacts with CCDC61 (By similarity). Interacts with TBK1; efficient complex formation may be dependent on the presence of CCDC61 (By similarity). Associated with the mature mother centriole. Associated with spindle microtubules during mitosis (By similarity). Localizes to the distal appendage region of the centriole (By similarity). Localizes at the centriole proximal ends (By similarity). Phosphorylated; probably by PLK1. Belongs to the CEP170 family.