Adapter that functions to localize a calcium-sensitive signal transduction machinery in sperm to a calcium-permeable ion channel (By similarity). Microtubule inner protein (MIP) part of the dynein-decorated doublet microtubules (DMTs) in cilia axoneme, which is required for motile cilia beating .
Subcellular locations: Cytoplasm, Cytoskeleton, Cilium axoneme, Cell projection, Cilium, Flagellum
Sperm acrosomal crescent and flagellar principal piece.
Expressed in airway epithelial cells.