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Regulation of wee1(+) expression during meiosis in fission yeast.


ABSTRACT: In eukaryotes, the cyclin-dependent kinase Cdk1p (Cdc2p) plays a central role in entry into and progression through nuclear division during mitosis and meiosis. Cdk1p is activated during meiotic nuclear divisions by dephosphorylation of its tyrosine-15 residue. The phosphorylation status of this residue is largely determined by the Wee1p kinase and the Cdc25p phosphatase. In fission yeast, the forkhead-type transcription factor Mei4p is essential for entry into the first meiotic nuclear division. We recently identified cdc25(+) as an essential target of Mei4p in the control of entry into meiosis I. Here, we show that wee1(+) is another important target of Mei4p in the control of entry into meiosis I. Mei4p bound to the upstream region of wee1(+) in vivo and in vitro and inhibited expression of wee1(+), whereas Mei4p positively regulated expression of the adjacent pseudogene. Overexpression of Mei4p inhibited expression of wee1(+) and induced that of the pseudogene. Conversely, deletion of Mei4p did not decrease expression of wee1(+) but inhibited that of the pseudogene. In addition, deletion of Mei4p-binding regions delayed repression of wee1(+) expression as well as induction of expression of the pseudogene. These results suggest that repression of wee1(+) expression is primarily owing to Mei4p-mediated transcriptional interference.

SUBMITTER: Murakami-Tonami Y 

PROVIDER: S-EPMC4612672 | biostudies-literature | 2014

REPOSITORIES: biostudies-literature

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Regulation of wee1(+) expression during meiosis in fission yeast.

Murakami-Tonami Yuko Y   Ohtsuka Hokuto H   Aiba Hirofumi H   Murakami Hiroshi H  

Cell cycle (Georgetown, Tex.) 20140101 18


In eukaryotes, the cyclin-dependent kinase Cdk1p (Cdc2p) plays a central role in entry into and progression through nuclear division during mitosis and meiosis. Cdk1p is activated during meiotic nuclear divisions by dephosphorylation of its tyrosine-15 residue. The phosphorylation status of this residue is largely determined by the Wee1p kinase and the Cdc25p phosphatase. In fission yeast, the forkhead-type transcription factor Mei4p is essential for entry into the first meiotic nuclear division  ...[more]

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