Predicted to enable tubulin binding activity and tubulin-glutamic acid ligase activity. Predicted to be involved in microtubule cytoskeleton organization and protein polyglutamylation. Predicted to act upstream of or within fertilization; retina development in camera-type eye; and sperm axoneme assembly. Predicted to be located in several cellular components, including 9+0 non-motile cilium; cytosol; and microtubule organizing center. Predicted to be active in cilium. Human ortholog(s) of this gene implicated in cone-rod dystrophy 19. Orthologous to human TTLL5 (tubulin tyrosine ligase like 5). [provided by Alliance of Genome Resources, Apr 2022]