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Does myosin have the ability to swivel when powered by ATP?
Yes...ATP causes myosin to detach from actin. Then, Hydrolysis of ATP, which results in ADP and P, causes conformational change in myosin head to swivel or pivot about its axis and then weakly bind to an actin filament. Once the myosin head binds, a conformational change in the myosin head will cause the P to leave (the ADP is still stuck on). The leaving of the P causes the power stroke or "the pulling of the actin filament/rowing stroke". ADP then leaves and the myosin is now back at its original state.
What are the thick protein filaments in the cell made of?
The thick filament is composed of the myosin molecule. The thin filament is composed of the actin molecule. Flexing the head of myosin provides the powerstroke.
Which step allows actin and myosin to release from each other?
an ATP molecule attaches to myosin apex answers
What happens to ATP when it binds to Myosin?
Energisation of the head takes place, then cross bridge linkage follows
ADP molecules on the surface of actin serve as active sites for the formation of cross bridges with molecules of?
ATP not ADP binds to actin-myosin and is cleaved by to ADP.
Difference between actin and myosin?
Myosin is a molecular motor that converts ATP to energy. Actin is responsible for cell movement and uses energy from the ATP conversion done by myosin..
Which molecule binds to the myosin head in order to break the actin-myosin bond?
ATP
Does myosin have the ability to swivel when powered by ATP?
Yes...ATP causes myosin to detach from actin. Then, Hydrolysis of ATP, which results in ADP and P, causes conformational change in myosin head to swivel or pivot about its axis and then weakly bind to an actin filament. Once the myosin head binds, a conformational change in the myosin head will cause the P to leave (the ADP is still stuck on). The leaving of the P causes the power stroke or "the pulling of the actin filament/rowing stroke". ADP then leaves and the myosin is now back at its original state.
What are the thick protein filaments in the cell made of?
The thick filament is composed of the myosin molecule. The thin filament is composed of the actin molecule. Flexing the head of myosin provides the powerstroke.
What molecule has a binding site for myosin heads?
Myosin heads bind to the actin binding site, and also has a part where ATP binds
What causes cross bridge detachment?
ATP binds to the myosin head
What immediately follows the binding of ATP to the myosin head?
The myosin head pivots, moving the actin strand.
What role does ATP play in muscle contraction?
The role ATP plays in muscle contraction is that ATP binds to sites on myosin heads, inducing a conformational change in the actin binding site and reducing the affinity for the actin substrate. Hydrolysis of ATP then cocks the myosin head and moves it closer to the z disk. Release of ADP increases the affinity of the actin binding site and a power stroke moves the head roughly 100 angstroms closer to the z disk. In short, after the power stroke, ATP is hydrolyzed to release the myosin heads from actin so that they can go to the next binding site on the actin filament. It's sort of like reloading the myosin gun.
An energy molecule that facilitates the sliding motion of actin and myosin?
ATP
Which step allows actin and myosin to release from each other?
an ATP molecule attaches to myosin apex answers
Which event causes cross bridge detachment?
ATP binding to the myosin head
What happens to ATP when it binds to Myosin?
Energisation of the head takes place, then cross bridge linkage follows
