Microtubule inner protein (MIP) part of the dynein-decorated doublet microtubules (DMTs) in cilia axoneme . Acts as a regulator of cilium basal body docking and positioning in mono- and multiciliated cells. Regulates basal body docking and cilia formation in multiciliated lung cells. Regulates kinocilium positioning and stereocilia bundle morphogenesis in the inner ear.
Subcellular locations: Cytoplasm, Cytoskeleton, Cilium basal body, Cell projection, Cilium, Apical cell membrane, Cytoplasm, Cytoskeleton, Cilium axoneme
Localizes to the apical cell membrane, the basal body and the primary cilium in monociliated node cells (By similarity).
Expressed in airway epithelial cells.