Article abstract
Nature Cell Biology 10, 19 - 29 (2008)
Published online: 9 December 2007 | doi:10.1038/ncb1665
Disruption of KIF17–Mint1 interaction by CaMKII-dependent phosphorylation: a molecular model of kinesin–cargo release
Laurent Guillaud1, Richard Wong1 & Nobutaka Hirokawa1
Abstract
Establishment and maintenance of cell structures and functions are highly dependent on the efficient regulation of intracellular transport in which proteins of the kinesin superfamily (KIFs) are very important. In this regard, how KIFs regulate the release of their cargo is a critical process that remains to be elucidated. To address this specific question, we have investigated the mechanism behind the regulation of the KIF17–Mint1 interaction. Here we report that the tail region of the molecular motor KIF17 is regulated by phosphorylation. Using direct visualization of protein–protein interaction by FRET and various in vitro and in vivo approaches we have demonstrated that CaMKII-dependent phosphorylation of KIF17 on Ser 1029 disrupts the KIF17–Mint1 association and results in the release of the transported cargo from its microtubule-based transport.
- Department of Cell Biology and Anatomy, Graduate School of Medicine, University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-0033, Japan.
Correspondence to: Nobutaka Hirokawa1 e-mail: hirokawa@m.u-tokyo.ac.jp
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