Cited by 42Ubiquitin and proteasome pathwaysMicrotubule and mitosis dynamicsFungal and yeast genetics research

Glucose and Ras Activity Influence the Ubiquitin Ligases APC/C and SCF in Saccharomyces cerevisiae

Irniger, Stefan, Bäumer, Matthias, Braus, Gerhard H·2000·Genetics

Abstract

In budding yeast, the Ras/cAMP pathway is involved in the coordination of cell growth and cell division. Glucose-rich medium stimulates Ras/cAMP signaling, which causes an increase in the critical cell size for cell cycle entry. Here we show that glucose and activated Ras proteins also influence the function of the anaphase-promoting complex (APC/C), a ubiquitin-protein ligase required for sister chromatid separation and mitotic exit. We found that apc10-22 and other mutants defective in the APC/C are suppressed by reduced Ras signaling activity, by a deletion of the RAS2 gene, by a cdc25 mutation, by elevated levels of PDE2, or by growth without glucose. Viability of these mutants is also enhanced by decreased Cdk1 activity. In contrast, a constitutively activated RAS2Val19 allele or shifts to glucose medium are deleterious to apc10-22 mutants. Remarkably, cdc34-2 mutants, which are impaired in SCF function, are differently affected with respect to Ras activity. Viability of cdc34-2 mutants at elevated temperatures is dependent on glucose and the RAS2 gene. We conclude that glucose and Ras proteins influence the APC/C and the SCF complex in an opposite manner. These ubiquitin ligases might represent novel targets for modulating cell division in response to growth conditions.

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  1. Zachariae et al. 1998a; Jaspersen et al. 1999). Downloaded from https://academic.oup.com/genetics/article/154/4/1509/6047919 by guest on 11 August 2023
  2. Gimeno, C. J., P. O. Ljungdahl, C. A. Styles and G. R. Fink, 1992 tory Press, Cold Spring Harbor, NY.

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Authors
Irniger, S., Bäumer, M., & Braus, G. H.
Affiliations
University of Göttingen (DE)
Corresponding author
Braus, Gerhard H
Venue
Genetics
Published
2000-04-01
Volume
154
Issue
4
Pages
1509-1521
ISSN
  • 0016-6731 (ISSN-L)
  • 1943-2631
OpenAlex
W2164697287
Cited by
42
References
60
Citations by year
2026: 1 · 2023: 1 · 2022: 1 · 2020: 1 · 2018: 3 · 2016: 1 · 2015: 2 · 2012: 1
FWCI
1.33
Type
journal article
Language
en
Open access
closed
Locations
  • Genetics (publishedVersion)
  • PubMed (publishedVersion)
  • GRO (submittedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Ubiquitin and proteasome pathways
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Microtubule and mitosis dynamics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Fungal and yeast genetics research
Keywords
glucose signaling, anaphase-promoting complex, SCF ubiquitin ligase, Cdc34, RAS2, cell cycle regulation, mitotic exit, sister chromatid separation, CDK1, Cdc25, PDE2, Saccharomyces cerevisiae, temperature sensitivity
MeSH terms
Glucose, Hydrolysis, Mutation, Peptide Synthases, Saccharomyces cerevisiae, Ubiquitins, Signal Transduction, ras Proteins, Cell Cycle Proteins, SKP Cullin F-Box Protein Ligases

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