Component of the axonemal radial spoke head which plays an important role in ciliary motility . Essential for triplet radial spokes (RS1, RS2 and RS3) head assembly in the motile cilia (By similarity).
Subcellular locations: Cytoplasm, Cytoskeleton, Cilium axoneme, Cell projection, Cilium
Expressed in trachea, lungs, and testes . Very strong expression is detected in nasal brushings .