Kinesin

It is curious to study kinesin, unlike myosin, a motor protein composed of two polypeptides that are wrapped with three important areas, the tail, the stem and the head.

The tail attaches to the vesicles generated in the cell to “walk” over the microtubules so that they carry these vesicles full of … well, it depends on what they have to transport.

Curious is knowing that there are different kinesins that correspond to different polypeptides that each of them is specialized in moving a different vesicle.

The movement is performed because an ATP (Adenosin Tri Phosphate) binds to a specific area of the head by changing the shape of the head and causing it to “move.” Come on, what a lifelong enzyme does, change shape when something “goes” in its active place by hydrolyzing the ATP. It’s easy, an ATP enter, modify the enzyme and expel the ATP as ADP (Adenosin Dphosphate) putting itself in its original configuration to enter another ATP and “advance” another step (this is not correct, it need all the P of the ATP for changing his configuration).

The tail, which binds to vesicles, is an area of ​​lipids and as such, are amphiphilic, using this property to bind vesicles.

Nature is beautiful, you just have to study it to understand it.

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