Plays a role in motile cilium function, possibly by acting on outer dynein arm assembly. Seems to be important for initiation rather than maintenance of cilium motility. Required for correct positioning of cilia at the apical cell surface, suggesting an additional role in the planar cell polarity (PCP) pathway. May suppress canonical Wnt signaling activity. Interacts with ZMYND10. Partially colocalized with SASS6 in cytoplasmic puncta, suggesting a centrosomal localization. Expressed in the trachea (at protein level). Belongs to the CFAP298 family.