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). Involved in egg activation by coupling dynamic actin to membrane. Interacts (via its IQ motifs) with calmodulin. Colocalizes with cortical F-actin to the plasma membrane. Colocalizes with exocytosing corticale granules upon egg activation. Expressed during oogenesis and eggs. Up-regulated by polyadenylation during meiotic maturation (at protein level). 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).