Microtubule polymerases and depolymerases

Howard, Jonathon; Hyman, Anthony A.

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Microtubule polymerases and depolymerases

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Howard, Jonathon
Max Planck Institute of Molecular Cell Biology and Genetics, Max Planck Society;

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Hyman, Anthony A.
Max Planck Institute of Molecular Cell Biology and Genetics, Max Planck Society;

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Citation

Howard, J., & Hyman, A. A. (2007). Microtubule polymerases and depolymerases. Current Opinion in Cell Biology, 19(1), 31-35.

Cite as: https://hdl.handle.net/21.11116/0000-0001-0EEE-5

Abstract

The variety of shapes and sizes of the microtubule cytoskeleton is as great as the number of different cell types. This large variety is a consequence of the dynamic properties of microtubules, which allow them to adopt distributions of arbitrary size and form. How is the distribution of microtubule lengths controlled? Recent work suggests that the length distribution is controlled, at least in part, by the activity of microtubule polymerases and depolymerases, which accelerate microtubule growth and shrinkage. Specifically, biochemical and single-molecule studies have shown how MCAK (kinesin-13) and Kip3p (kinesin-8) accelerate depolymerization and how XMAP215 may accelerate growth. Studies on the yeast Dam1 complex have shown how proteins can couple a cellular structure, the kinetochore, to the ends of polymerizing and depolymerizing microtubules.