Motor proteins Animation

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Motor proteins kinesin and dynein move along microtubules.

Dynein and kinesin have footlike domains that bind to and move along the microtubule. Upper domains bind to a structure or cell component to be moved.

Most dyneins move toward the minus end of a microtubule.

Most kinesins move in the opposite direction.

This model shows how kinesin heads repeatedly inch along a microtubule.

Phosphate group transfers from ATP drive the movement.

In this way, kinesin travels along a microtubule, dragging its cellular freight with it.