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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Molecular dissection of the microtubule depolymerizing activity of mitotic centromere-associated kinesin.

Mitotic centromere-associated kinesin (MCAK) is a microtubule depolymerizer that is consistent with its role in promoting chromosome segregation during mitosis. Here we show that the conserved motor domain of MCAK is necessary but not sufficient for microtubule depolymerization in cells or in vitro. The addition of only 30 amino acids N-terminal to the motor restores depolymerization activity. Furthermore, dimerization studies revealed that the smallest functional MCAK deletion constructs are monomers. These results define a highly conserved domain within MCAK and related (KIN I) kinesins that is critical for depolymerization activity and show that this depolymerization is not dependent on MCAK dimerization.[1]


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