Crossref journal-article
Rockefeller University Press
The Journal of Cell Biology (291)
Abstract

Little is known about the pathways used by cyclins and cyclin-dependent kinases to induce the events of the cell cycle. In budding yeast, a protein called Nap1 binds to the mitotic cyclin Clb2, and Nap1 is required for the ability of Clb2 to induce specific mitotic events, but the role played by Nap1 is unclear. We have used genetic and biochemical approaches to identify additional proteins that function with Nap1 in the control of mitotic events. These approaches have both identified a protein kinase called Gin4 that is required for the ability of Clb2 and Nap1 to promote the switch from polar to isotropic bud growth that normally occurs during mitosis. Gin4 is also required for the ability of Clb2 and Nap1 to promote normal progression through mitosis. The Gin4 protein becomes phosphorylated as cells enter mitosis, resulting in the activation of Gin4 kinase activity, and the phosphorylation of Gin4 is dependent upon Nap1 and Clb2 in vivo. Affinity chromatography experiments demonstrate that Gin4 binds tightly to Nap1, indicating that the functions of these two proteins are closely tied within the cell. These results demonstrate that the activation of Gin4 is under the control of Clb2 and Nap1, and they provide an important step towards elucidating the molecular pathways that link cyclin-dependent kinases to the events they control.

Bibliography

Altman, R., & Kellogg, D. (1997). Control of Mitotic Events by Nap1 and the Gin4 Kinase. The Journal of Cell Biology, 138(1), 119–130.

Authors 2
  1. Roger Altman (first)
  2. Douglas Kellogg (additional)
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Dates
Type When
Created 23 years, 1 month ago (July 26, 2002, 12:47 p.m.)
Deposited 2 years, 1 month ago (July 28, 2023, 6:48 p.m.)
Indexed 2 months ago (July 2, 2025, 3:07 p.m.)
Issued 28 years, 1 month ago (July 14, 1997)
Published 28 years, 1 month ago (July 14, 1997)
Published Online 28 years, 1 month ago (July 14, 1997)
Published Print 28 years, 1 month ago (July 14, 1997)
Funders 0

None

@article{Altman_1997, title={Control of Mitotic Events by Nap1 and the Gin4 Kinase}, volume={138}, ISSN={1540-8140}, url={http://dx.doi.org/10.1083/jcb.138.1.119}, DOI={10.1083/jcb.138.1.119}, number={1}, journal={The Journal of Cell Biology}, publisher={Rockefeller University Press}, author={Altman, Roger and Kellogg, Douglas}, year={1997}, month=jul, pages={119–130} }