Enables ATP binding activity; actin filament binding activity; and microfilament motor activity. Acts upstream of or within actin filament-based movement. Located in several cellular components, including brush border; growth cone; and stress fiber. Part of myosin complex. Is expressed in several structures, including alimentary system; central nervous system; respiratory system; sensory organ; and vibrissa. Human ortholog(s) of this gene implicated in autosomal dominant nonsyndromic deafness 4A and sensorineural hearing loss. Orthologous to human MYH14 (myosin heavy chain 14). [provided by Alliance of Genome Resources, Apr 2022]