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The cycle of myosin-actin interaction is outlined as follows: <ref name="Lehninger" /> | The cycle of myosin-actin interaction is outlined as follows: <ref name="Lehninger" /> | ||
1. ATP binds to myosin and a binding site opens on myosin head to disrupt the actin-myosin interaction, actin is released. ATP is hydrolyzed | |||
2. a conformational change moving the protein to a "high-energy" state causes the myosin head to change orientation moving it to bind with the actin subunit closer the a region called the Z disk than the previous actin subunit | |||
3. the binding site is closed, strengthening the myosin-actin binding | |||
4. a power stroke quickly follows and the myosin head undergoes an additional conformational change bringing it back to the resting state in which it began | |||
Click the link to access DNAtube video "A Moving Myosin Motor Protein" | Click the link to access DNAtube video "A Moving Myosin Motor Protein" | ||