Mitotic Exit Network controls the localization of Cdc14 to the Spindle Pole Body in Saccharomyces cerevisiae

Satoshi Yoshida, Kazuhide Asakawa, Akio Toh-e

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75 Citations (Scopus)


Budding yeast Cdc14 phosphatase plays essential roles in mitotic exit. Cdc14 is sequestered in the nucleolus by its inhibitor Net1/Cfi1 and is only released from the nucleolus during anaphase to inactivate mitotic CDK. It is believed that the mitotic exit network (MEN) is required for the release of Cdc14 from the nucleolus because liberation of Cdc14 by net1/cfi1 mutations bypasses the essential role of the MEN. But how the MEN residing at the spindle pole body (SPB) controls the association of Cdc14 with Net1/Cfi1 in the nucleolus is not yet understood [1, 2]. We found that Cdc14-5GFP was released from the nucleolus in the MEN mutants (tem1, cdc15, dbf2, and nud1), but not in the cdc5 cells during early anaphase. The Cdc14 liberation from the nucleolus was inhibited by the Mad2 checkpoint and by the Bub2 checkpoint in a different manner when microtubule organization was disrupted. We observed Cdc14-5GFP atthe SPB in addition to the nucleolus. The SPB localization of Cdc14 was significantly affected by the MEN mutations and the bub2 mutation. We conclude that Cdc14 is released from the nucleolus at the onset of anaphase in a CDC5-dependent manner and that MEN factors possibly regulate Cdc14 release from the SPB.

Original languageEnglish
Pages (from-to)944-950
Number of pages7
JournalCurrent Biology
Issue number11
Publication statusPublished - 2002 Jun 4
Externally publishedYes

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Agricultural and Biological Sciences(all)


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