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• W1987684805 abstract "Cyclin-dependent kinase (Cdk1) activity is required for mitotic entry, and this event is restrained by an inhibitory phosphorylation of the catalytic subunit Cdc28 on a conserved tyrosine (Tyr19). This modification is brought about by the protein kinase Swe1 that inhibits Cdk1 activation thus blocking mitotic entry. Swe1 levels are regulated during the cell cycle, and they decrease during G2/M concomitantly to Cdk1 activation, which drives entry into mitosis. However, after mitotic entry, a pool of Swe1 persists, and we collected evidence that it is involved in controlling mitotic spindle elongation. We also describe that the protein phosphatase Cdc14 is implicated in Swe1 regulation; in fact, we observed that Swe1 dephosphorylation in vivo depends on Cdc14 that, in turn, is able to control its subcellular localization. In addition we show that the lack of Swe1 causes premature mitotic spindle elongation and that high levels of Swe1 block mitotic spindle elongation, indicating that Swe1 inhibits this process. Importantly, these effects are not dependent upon the role of in Cdk1 inhibition. These data fit into a model in which Cdc14 binds and inhibits Swe1 to allow timely mitotic spindle elongation.Timely mitotic spindle elongation ensures correct chromosome segregation, which is crucial for genetic stability.ResultsThe protein kinase Swe1 contributes to restraining anaphase progression and is regulated by the protein phosphatase Cdc14.ConclusionSwe1 plays a role in the control of mitotic spindle elongation.SignificanceSwe1 regulation by Cdc14 allows proper coordination of spindle elongation with mitotic progression. Cyclin-dependent kinase (Cdk1) activity is required for mitotic entry, and this event is restrained by an inhibitory phosphorylation of the catalytic subunit Cdc28 on a conserved tyrosine (Tyr19). This modification is brought about by the protein kinase Swe1 that inhibits Cdk1 activation thus blocking mitotic entry. Swe1 levels are regulated during the cell cycle, and they decrease during G2/M concomitantly to Cdk1 activation, which drives entry into mitosis. However, after mitotic entry, a pool of Swe1 persists, and we collected evidence that it is involved in controlling mitotic spindle elongation. We also describe that the protein phosphatase Cdc14 is implicated in Swe1 regulation; in fact, we observed that Swe1 dephosphorylation in vivo depends on Cdc14 that, in turn, is able to control its subcellular localization. In addition we show that the lack of Swe1 causes premature mitotic spindle elongation and that high levels of Swe1 block mitotic spindle elongation, indicating that Swe1 inhibits this process. Importantly, these effects are not dependent upon the role of in Cdk1 inhibition. These data fit into a model in which Cdc14 binds and inhibits Swe1 to allow timely mitotic spindle elongation.Timely mitotic spindle elongation ensures correct chromosome segregation, which is crucial for genetic stability. The protein kinase Swe1 contributes to restraining anaphase progression and is regulated by the protein phosphatase Cdc14. Swe1 plays a role in the control of mitotic spindle elongation." @default.
• W1987684805 created "2016-06-24" @default.
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• W1987684805 date "2015-01-01" @default.
• W1987684805 modified "2023-10-15" @default.
• W1987684805 title "Budding Yeast Swe1 Is Involved in the Control of Mitotic Spindle Elongation and Is Regulated by Cdc14 Phosphatase during Mitosis" @default.
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• W1987684805 doi "https://doi.org/10.1074/jbc.m114.590984" @default.
• W1987684805 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4358240" @default.
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