Dynamin 2 associates with microtubules at mitosis and regulates cell cycle progression

Nobuhisa Ishida, Yuichi Nakamura, Kenji Tanabe, Shun Ai Li, Kohji Takei

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)


Dynamin, a ~100 kDa large GTPase, is known as a key player for membrane traffic. Recent evidence shows that dynamin also regulates the dynamic instability of microtubules by a mechanism independent of membrane traffic. As microtubules are highly dynamic during mitosis, we investigated whether the regulation of microtubules by dynamin is essential for cell cycle progression. Dynamin 2 intensely localized at the mitotic spindle, and the localization depended on its proline-rich domain (PRD), which is required for microtubule association. The deletion of PRD resulted in the impairment of cytokinesis, whereby the mutant had less effect on endocytosis. Interestingly, dominant-negative dynamin (K44A), which blocks membrane traffic but has no effect on microtubules, also blocked cytokinesis. On the other hand, the deletion of the middle domain, which binds to γ-tubulin, impaired the entry into mitosis. As both deletion mutants had no significant effect on endocytosis, dynamin 2 may participate in cell cycle progression by regulating the microtubules. These data suggest that dynamin may play a key role for cell cycle progression by two distinct pathways, membrane traffic and cytoskeleton.

Original languageEnglish
Pages (from-to)145-154
Number of pages10
JournalCell structure and function
Issue number2
Publication statusPublished - 2011


  • Cytokinesis
  • Dynamin
  • Endocytosis
  • Microtubules
  • Mitosis

ASJC Scopus subject areas

  • Physiology
  • Molecular Biology
  • Cell Biology


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