Motor protein involved in microtubule-associated anterograde transport (PubMed:1846075). Regulates the transport of synaptic vesicle precursors in the axon of DA motor neurons (PubMed:20510931). Regulates the polarized sorting of axonal proteins (PubMed:22101643). Essential for the transport of synaptic components during the synaptic remodeling of the DD motor neuron, probably downstream of cdk-5 and/or pct-1/cyy-1 complex (PubMed:21609829). Required for the anterograde transport of neuropeptide-containing dense core vesicles along axons (PubMed:12657671). Involved in necrotic cell death (PubMed:22157748). Expressed in nerve ring, amphid commissure and ventral nerve cord (at protein level). Worms exhibit uncoordinated and slow movement. Belongs to the TRAFAC class myosin-kinesin ATPase superfamily. Kinesin family. Unc-104 subfamily.