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Ch. 7 - Inside the Cell
All textbooksFreeman 8th EditionCh. 7 - Inside the CellProblem 4
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Chapter 7, Problem 4

How does the hydrolysis of ATP result in the movement of a motor protein along a cytoskeletal filament?

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Hi everyone. Let's look at our next question. After the hydraulics is of a T. P. What happens first before the mechanical movement through muscle contraction is produced. So we've got mechanical movement being caused through the cross bridge linkage of Acton and myosin. So we have imagine are acting filament here and then we've got our mayas in filament coming down with sort of a head here. And Maya sin in its low energy confirmation. It's bound to a molecule of a. T. P. Now it says after the hydraulics of a T. P. So now 80 P. Has been hydrolyzed over here and I gotta act in filament and the hydraulic sis of the A. T. P. Now we have our medicine. It's now got A D. P. It's released an organic phosphate and that causes a change in confirmation. The hydraulics of A T. P. Causes a change in confirmation of this Maya son head and that in turn allows binding to act in and the formation of the cross bridge. So again we've got the hydraulics of a T. P. That causes a change in confirmation of the miocene head which allows it to perform that cross bridge linkage to the axon filament. So let's look at our answer choices to see what best describes that. We've got choice. A Miocene must be hydrolyzed. Well that is not correct. It's a TP that gets hydrolyzed. Then we've got choice be acting must be powered up with a T. P. That's also not a correct answer. Acting is not interacting with the A. T. P. Here. It's my assassin. Um That is has the A. T. P. Bound to it. Choice C. Says Miocene head will bind to act in and that is correct. After the hydraulics of a teepee, the my son had binds to act in. That is what must take place before this mechanical movement can happen. And Choice D. Says my ascendant acting will be reduced in length. Well, that does not happen. That is not our answer. So again, after the hydraulics is of a. T. P. What happens first before the mechanical movement through muscle contraction is produced and that is choice. See the Miocene head will bind to acting. See you in the next video.
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