Crossref journal-article
American Society for Cell Biology (ASCB)
Molecular Biology of the Cell (1076)
Abstract

In the fission yeast Schizosaccharomyces pombe, p34cdc2plays a central role controlling the cell cycle. We recently isolated a new gene named srw1+, capable of encoding a WD repeat protein, as a multicopy suppressor of hyperactivated p34cdc2. Cells lackingsrw1+are sterile and defective in cell cycle controls. When starved for nitrogen source, they fail to effectively arrest in G1and die of accelerated mitotic catastrophe if regulation of p34cdc2/Cdc13 by inhibitory tyrosine phosphorylation is compromised by partial inactivation of Wee1 kinase. Fertility is restored to the disruptant by deletion of Cig2 B-type cyclin or slight inactivation of p34cdc2.srw1+shares functional similarity withrum1+, having abilities to induce endoreplication and restore fertility to rum1disruptants. In the srw1 disruptant, Cdc13 fails to be degraded when cells are starved for nitrogen. We conclude that Srw1 controls differentiation and cell cycling at least by negatively regulating Cig2- and Cdc13-associated p34cdc2and that one of its roles is to down-regulate the level of the mitotic cyclin particularly in nitrogen-poor environments.

Bibliography

Yamaguchi, S., Murakami, H., & Okayama, H. (1997). A WD Repeat Protein Controls the Cell Cycle and Differentiation by Negatively Regulating Cdc2/B-Type Cyclin Complexes. Molecular Biology of the Cell, 8(12), 2475–2486.

Authors 3
  1. Satoko Yamaguchi (first)
  2. Hiroshi Murakami (additional)
  3. Hiroto Okayama (additional)
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Dates
Type When
Created 12 years, 1 month ago (July 2, 2013, 7:12 p.m.)
Deposited 3 years, 6 months ago (Feb. 26, 2022, 9:34 p.m.)
Indexed 3 weeks, 1 day ago (Aug. 5, 2025, 8:11 a.m.)
Issued 27 years, 8 months ago (Dec. 1, 1997)
Published 27 years, 8 months ago (Dec. 1, 1997)
Published Print 27 years, 8 months ago (Dec. 1, 1997)
Funders 0

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@article{Yamaguchi_1997, title={A WD Repeat Protein Controls the Cell Cycle and Differentiation by Negatively Regulating Cdc2/B-Type Cyclin Complexes}, volume={8}, ISSN={1939-4586}, url={http://dx.doi.org/10.1091/mbc.8.12.2475}, DOI={10.1091/mbc.8.12.2475}, number={12}, journal={Molecular Biology of the Cell}, publisher={American Society for Cell Biology (ASCB)}, author={Yamaguchi, Satoko and Murakami, Hiroshi and Okayama, Hiroto}, year={1997}, month=dec, pages={2475–2486} }