Walking the line
Motor proteins have been observed to march around the cells delivering cargoes or energy producing mitochondria to the cellular neighborhood or to the precise locations, with impeccable timing. They provide the pulling power that is required to separate the chromosomes during the cell division. Motor protein deliver neurotransmitter to the tips of verve cells, up to 1 meter away from where the neurotransmitters were produced. Kinesin and dynein position organelles strategically throughout the cell, permitting heterogeneous organization as exemplified by neurons. Progressive protein motors are characterized by the ability to use ATP to walk along filament roadways. Most of the myosin and kinesin motors are composed of dimer of two legs, which twist around each other in an Α-helical coiled coil. Chemists are involved in studying the structural biology of the motors and their regulatory mechanisms.
Everts, S. (2006). Walking the line.