Myosins are actin-based motor molecules with ATPase activity. Unconventional myosins serve in intracellular movements. Their highly divergent tails are presumed to bind to membranous compartments, which would be moved relative to actin filaments (By similarity). Interacts (via its IQ motifs) with calmodulin. Detected in stereocilia at the insertions of stereocilia into the apical surface of the cell, near the side plaques of tip links and near the tops of the tip links. Expressed in brain and the sacculus of the internal ear. Belongs to the TRAFAC class myosin-kinesin ATPase superfamily. Myosin family. Represents an unconventional myosin. This protein should not be confused with the conventional myosin-1 (MYH1).