Probable actin-based motor with a protein kinase activity. Probably plays a role in vision and hearing . Required for normal cochlear hair bundle development and hearing. Plays an important role in the early steps of cochlear hair bundle morphogenesis. Influences the number and lengths of stereocilia to be produced and limits the growth of microvilli within the forming auditory hair bundles thereby contributing to the architecture of the hair bundle, including its staircase pattern. Involved in the elongation of actin in stereocilia tips by transporting the actin regulatory factor ESPN to the plus ends of actin filaments (By similarity).
Subcellular locations: Cytoplasm, Cytoskeleton, Cytoplasm, Cell projection, Filopodium tip, Cell projection, Stereocilium
Increased localization at the filodium tip seen in the presence of MORN4.
Strongest expression in retina, retinal pigment epithelial cells, cochlea and pancreas.