Enables intraciliary transport particle B binding activity. Predicted to be involved in intraciliary transport. Predicted to act upstream of or within intraciliary anterograde transport. Located in centrosome and cilium. Part of intraciliary transport particle B. Orthologous to human TTC30A (tetratricopeptide repeat domain 30A) and TTC30B (tetratricopeptide repeat domain 30B). [provided by Alliance of Genome Resources, Apr 2022]