Question

What allows motor proteins to "walk" along a filament?

a. Plectin binding to tubulin
b. Cycling between GTP-bound and GDP-bound
c. Synchronized catastrophe and rescue
d. Phosphorylation of GTP on heads
e. Conformational change regulated by repeated ATP hydrolysis, energy released

Answer 1

Motor proteins are able to "walk" along a filament, such as actin, due to a conformational change regulated by repeated ATP hydrolysis, energy released.

Step-by-step explanation:

Motor proteins are able to "walk" along a filament, such as actin, due to a conformational change regulated by repeated ATP hydrolysis, energy released. This means that the motor protein undergoes a change in shape as ATP is hydrolyzed, releasing energy that powers the movement of the protein along the filament. In the case of myosin, which is a motor protein that walks along microfilaments, the myosin heads undergo a series of allosteric changes that enable the myosin rod to move along the actin filament.