Required for sperm flagellum formation and maturation of elongating spermatids, thus playing an essential role in male fertility. Contributes to in vitro proteolytic cleavage of SEPT10 in a calmodulin-dependent manner.
Subcellular locations: Cell projection, Cilium, Flagellum
Expressed within the midpiece and along the whole sperm flagellum. Detected in the annulus of the sperm flagellum in S12 and S15 spermatids and mature sperm.