Microtubule-binding centrosomal protein required for centriole cohesion, independently of the centrosome-associated protein/CEP250 and rootletin/CROCC linker. In interphase, required for anchoring microtubule at the mother centriole subdistal appendages and for centrosome positioning. During mitosis, may be involved in spindle assembly and chromatin alignment by regulating the organization of spindle microtubules into a symmetrical structure. Plays a non-essential role in ciliogenesis. Forms homodimers (via head domain). Localization at the centriolar satellite is dependent on intact microtubule network. Localizes at the centriole subdistal appendages and proximal ends. Localized to centrosomal/satellite-like structures with the onset of centrosome separation in early G2. The coiled-coil domain is involved in microtubule-binding. The N-terminal 3D structure (head domain) resembles that of NHEJ1/XLF, PAXX, SASS6 and XRCC4. Belongs to the CCDC61 family.