Myosin, dynein and kinase all "walk" towards specific ends of the microtubule or actin filament they are on. I'm most familiar with the walking mechanism for myosin, where ATP fuels conformal changes in the binding region, but I don't understand how it chooses to go one direction over another. Actin fibers' positive and negative ends are fueled by the addition of G-actin via ATP and its subsequent reduction to ADP, so I suspect that this process is somehow involved in determining the direction of myosin's movement.
As just a secondary thought, are there differences in the mechanisms of the movement between the three walking molecules listed above?
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