Required for anchoring microtubules to the centrosomes. Required for ciliation. Homodimer. Part of a ternary complex that contains CEP350, CEP43 and MAPRE1. Interacts directly with CEP350 and MAPRE1. Interacts with CEP19. Interacts (via N-terminus) with CEP350 (via C-terminus). Associated with gamma-tubulin. Localizes on both mother and daughter centrioles. Localizes to an axial position on the mother centriole. Localizes to the distal end of the centriole partly to the subdistal appendage region. Belongs to the CEP43 family.