Enables several functions, including ATP binding activity; ATP-dependent protein binding activity; and syntaxin-1 binding activity. Involved in several processes, including cytoskeleton-dependent intracellular transport; positive regulation of cytochrome-c oxidase activity; and regulation of secretion by cell. Acts upstream of or within pigmentation. Located in several cellular components, including cytoplasmic vesicle; dendrite; and neuronal cell body. Part of actomyosin, myosin complex part and ribonucleoprotein complex. Is active in Schaffer collateral - CA1 synapse; glutamatergic synapse; and postsynaptic actin cytoskeleton. Human ortholog(s) of this gene implicated in Griscelli syndrome type 1. Orthologous to human MYO5A (myosin VA). [provided by Alliance of Genome Resources, Apr 2022]