Enables identical protein binding activity. Involved in several processes, including actin filament bundle organization; modification of postsynaptic actin cytoskeleton; and regulation of modification of postsynaptic actin cytoskeleton. Located in lamellipodium. Is active in glutamatergic synapse and postsynaptic actin cytoskeleton. Orthologous to human MYH10 (myosin heavy chain 10). [provided by Alliance of Genome Resources, Apr 2022]