Predicted to enable ATP binding activity; actin filament binding activity; and cytoskeletal motor activity. Predicted to be part of myosin complex. Is an ortholog of C. elegans unc-54 and members of the C. elegans myo and nmy gene classes including myo-3 and nmy-2. In C. elegans, myo-1 is involved in muscle contraction and pharyngeal pumping.