Myosins are actin-based motor molecules with ATPase activity. Involved in macropinocytosis and remodeling of actin cytoskeleton. Monomer. Enriched in actin cortex regions. Expressed (in low abundance) during the first half of the developmental cycle. DH (RhoGEF) domain interacts with Rac1-related GTPases. Belongs to the TRAFAC class myosin-kinesin ATPase superfamily. Myosin family.