Involved in spermatozoa motility (, ). May also regulate cilium motility through its role in the assembly of the axonemal radial spokes (By similarity).
Subcellular locations: Cytoplasm, Cytoskeleton, Cilium axoneme, Cell projection, Cilium, Flagellum
Isoform 1 is highly expressed in testis and, at lower levels, in lung. Very low levels are detected in kidney and brain . In testis, expressed in spermatozoa (at protein level) (, ). Isoform 2 is not detected in testis, lung, kidney, nor in brain .