Microtubule-associated force-producing protein that may play a role in organelle transport. Has ATPase activity (By similarity). Involved in synaptic transmission (PubMed:24812067). Mediates dendritic trafficking of mRNAs (By similarity). Required for anterograde axonal transportation of MAPK8IP3/JIP3 which is essential for MAPK8IP3/JIP3 function in axon elongation (By similarity). {ECO:0000250|UniProtKB:P28738, ECO:0000250|UniProtKB:P56536, ECO:0000269|PubMed:24812067}. This is the function of KIF5C (kinesin family member 5C, Ensembl gene identifier ENSG00000168280).