Abstract
The small Suc1/Cks protein is a ubiquitous subunit of Cdk/cyclin complexes, but its precise function has remained unclear. We have isolated a Xenopus homolog, Xe-p9, of the Suc1/Cks protein by virtue of its ability to rescue a fission yeast mutant that enters mitosis prematurely. To assess its functional role in cell cycle control, we have both overexpressed p9 in Xenopus egg extracts and immunodepleted the protein from these extracts. We found that addition of recombinant His6-p9 to egg extracts results in a pronounced delay of mitosis that can be attributed to an inhibition of the tyrosine dephosphorylation of the inactive Cdc2/cyclin B complex. In immunodepletion studies, we observed that the consequences of removing p9 from egg extracts depend on the stage of the cell cycle. Specifically, in the case of interphase extracts, the removal of p9 abolishes the entry into mitosis as a result of a failure in the activation of the Cdc2/cyclin B complex by tyrosine dephosphorylation. Furthermore, mitotic extracts lacking p9 fail to exit mitosis because of a defect in the destruction of cyclin B. Collectively, these results indicate that p9 has multiple essential roles in the cell cycle by governing the interaction of the Cdc2/cyclin B complex with both positive and negative regulators.
References
69
Referenced
76
10.1073/pnas.87.11.4043
10.1016/0092-8674(88)90060-8
10.1006/jmbi.1995.0341
10.1091/mbc.5.9.989
10.1128/MCB.15.4.2028
/ Mol Cell Biol. / pl3 suc1 of Schizosaccharomyces pombe regulates two distinct forms of the mitotic Cdc2 kinase. (1995)10.1073/pnas.92.22.10232
10.1016/S0092-8674(00)81065-X
10.1002/j.1460-2075.1987.tb02676.x
/ EMBO J. / pl3sucl acts in the fission yeast cell division cycle as a component of the p34cdc2 protein kinase. (1987)10.1038/379357a0
10.1016/0955-0674(94)90060-4
10.1016/0092-8674(93)90580-J
10.1016/0962-8924(93)90001-H
10.1016/0962-8924(94)90142-2
10.1016/0092-8674(91)90582-J
10.1016/0092-8674(89)90414-5
10.1016/0092-8674(88)90205-X
10.1016/S0969-2126(01)00162-9
10.1002/j.1460-2075.1995.tb07081.x
/ EMBO J. / The crystal structure of pl3 suc1 , a p34 cdc2 -interacting cell cycle control protein. (1995)10.1002/j.1460-2075.1990.tb08159.x
/ EMBO J. / Cdc2 H1 kinase is negatively regulated by a type 2A phosphatase in the Xenopus early embryonic cell cycle: Evidence from the effects of okadaic acid. (1990)10.1038/346379a0
10.1016/0092-8674(88)90206-1
10.1016/0092-8674(91)90583-K
10.1038/349132a0
{'key': '2021111418375969000_10.12.1503.24', 'first-page': '2034', 'article-title': 'The Saccharomyces cerevisiae CKS1 gene, a homolog of the Schizosaccharomyces pombe suc1+\n gene, encodes a subunit of the Cdc28 protein kinase complex.', 'volume': '9', 'year': '1989', 'journal-title': 'Mol. Cell. Biol.'}
/ Mol. Cell. Biol. / The Saccharomyces cerevisiae CKS1 gene, a homolog of the Schizosaccharomyces pombe suc1+ gene, encodes a subunit of the Cdc28 protein kinase complex. (1989)10.1007/BF00331653
10.1002/j.1460-2075.1986.tb04653.x
/ EMBO J. / suc1 is an essential gene involved in both the cell cycle and growth in fission yeast. (1986)10.1016/S0021-9258(17)37636-6
/ J. Biol. Chem. / Components of a system that ligates cyclin to ubiquitin and their regulation by the protein kinase cdc2. (1994){'key': '2021111418375969000_10.12.1503.28', 'first-page': '504', 'article-title': 'Suc1+\n encodes a predicted 13-kilodalton protein that is essential for cell viability and is directly involved in the division cycle of Schizosaccharomyces pombe.', 'volume': '7', 'year': '1987', 'journal-title': 'Mol. Cell. Biol.'}
/ Mol. Cell. Biol. / Suc1+ encodes a predicted 13-kilodalton protein that is essential for cell viability and is directly involved in the division cycle of Schizosaccharomyces pombe. (1987)10.1002/j.1460-2075.1993.tb05631.x
/ EMBO J. / Phosphorylation and activation of human Cdc25-C by Cdc2-cyclin B and its involvement in the self-amplification of MPF at mitosis. (1993)10.1016/0092-8674(94)90543-6
10.1016/0092-8674(95)90337-2
10.1091/mbc.4.12.1337
10.1091/mbc.3.8.927
10.1242/dev.111.3.813
/ Development / Tyrosine phosphorylation of p34 cdc2 and p42 during meiotic maturation of Xenopus oocyte: Antagonistic action of okadaic acid and 6-DMAP. (1991)10.1016/0092-8674(94)90542-8
10.1016/0092-8674(95)90338-0
10.1091/mbc.5.3.273
10.1016/0092-8674(91)90315-P
10.1016/0092-8674(92)90540-S
10.1091/mbc.6.2.199
10.1016/0962-8924(92)90076-Y
10.1002/j.1460-2075.1991.tb05009.x
/ EMBO J. / Both cyclin A Δ60 and B Δ97 are stable and arrest cells in M-phase, but only cyclin B Δ97 turns on cyclin destruction. (1991)10.1002/j.1460-2075.1993.tb05633.x
/ EMBO J. / Human Weel kinase inhibits cell-division by phosphorylating p34 cdc2 exclusively on tyr15. (1993)10.1101/SQB.1991.056.01.045
10.1016/0092-8674(94)90256-9
10.1016/0092-8674(89)90850-7
10.1016/0076-6879(91)94059-L
10.1038/374131a0
10.1091/mbc.6.1.119
10.1126/science.270.5233.86
10.1016/S0091-679X(08)60298-8
10.1016/0092-8674(95)90322-4
10.1038/339275a0
10.1016/0955-0674(93)90099-C
10.1016/0092-8674(94)90539-8
10.1083/jcb.126.4.827
10.1126/science.8211159
10.1126/science.1384126
10.1083/jcb.115.2.337
10.1016/0968-0004(93)90185-P
10.1101/gad.4.8.1332
10.1016/0378-1119(92)90069-2
10.1016/0092-8674(94)90540-1
10.1101/gad.9.10.1149
10.1016/0968-0004(94)90137-6
10.1016/0092-8674(90)90504-8
10.1101/gad.7.5.822
10.1002/j.1460-2075.1993.tb06017.x
/ EMBO J. / Two distinct mechanisms for negative regulation of the Weel protein ki-nase. (1993)10.1016/0092-8674(95)90336-4
Dates
Type | When |
---|---|
Created | 18 years, 2 months ago (June 5, 2007, 5:15 p.m.) |
Deposited | 3 years, 9 months ago (Nov. 14, 2021, 9:50 p.m.) |
Indexed | 1 month, 2 weeks ago (July 9, 2025, 6:54 p.m.) |
Issued | 29 years, 2 months ago (June 15, 1996) |
Published | 29 years, 2 months ago (June 15, 1996) |
Published Online | 29 years, 2 months ago (June 15, 1996) |
Published Print | 29 years, 2 months ago (June 15, 1996) |
@article{Patra_1996, title={Xe-p9, a Xenopus Suc1/Cks homolog, has multiple essential roles in cell cycle control.}, volume={10}, ISSN={1549-5477}, url={http://dx.doi.org/10.1101/gad.10.12.1503}, DOI={10.1101/gad.10.12.1503}, number={12}, journal={Genes & Development}, publisher={Cold Spring Harbor Laboratory}, author={Patra, D and Dunphy, W G}, year={1996}, month=jun, pages={1503–1515} }