All belong to molecular motor family except ?
Correct Answer: Actin
Description: Ans. is 'd' i.e., Actin Molecular motors Molecular motors are protein with ATPase or GTPase activity that move organelles, proteins, and other components of cell to all pas of the cells. These proteins produce force movement in wide variety of cellular processes including vesicular transpo, cell division, nuclear migration, muscle contraction, mechanochemical transduction and others. Molecular motors use energy to generate this force (molecular motors are ATPase/ GTPase). Impoant cytoskeletal molecular motors are :? i) Kinesin (an ATPase) :- Involved in axoplasmic transpo and uses hydrolysis of ATP to move vesicles down the axon toward the positive (+) end of microtubule formation. ii) Dynein (an ATPase) :- It also uses ATP. there are two types of dynein : ? a) Cytosolic dynein :- Involved in axoplasmic flow to move vesicle in opposite direction, i.e., towards the negative end of microtubules. b) Axonemal dynein :- Power ciliary and flagellar movement. iii) Dynamin (a GTPase) :- Uses GTP and is involved in endocytosis. iv) Myosin (an ATPase) Uses ATP and is involved in muscle contraction by binding with actin.
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