Publication Date:
2007-06-30
Description:
When prototrophic yeast cells are cultured under nutrient-limited conditions that mimic growth in the wild, rather than in the high-glucose solutions used in most laboratory studies, they exhibit a robustly periodic metabolic cycle. Over a cycle of 4 to 5 hours, yeast cells rhythmically alternate between glycolysis and respiration. The cell division cycle is tightly constrained to the reductive phase of this yeast metabolic cycle, with DNA replication taking place only during the glycolytic phase. We show that cell cycle mutants impeded in metabolic cycle-directed restriction of cell division exhibit substantial increases in spontaneous mutation rate. In addition, disruption of the gene encoding a DNA checkpoint kinase that couples the cell division cycle to the circadian cycle abolishes synchrony of the metabolic and cell cycles. Thus, circadian, metabolic, and cell division cycles may be coordinated similarly as an evolutionarily conserved means of preserving genome integrity.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chen, Zheng -- Odstrcil, Elizabeth A -- Tu, Benjamin P -- McKnight, Steven L -- New York, N.Y. -- Science. 2007 Jun 29;316(5833):1916-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75390, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17600220" target="_blank"〉PubMed〈/a〉
Keywords:
*Cell Cycle
;
Cell Cycle Proteins/genetics/metabolism
;
Checkpoint Kinase 2
;
*DNA Replication
;
*Genome, Fungal
;
*Glycolysis
;
Homeostasis
;
Hydrogen Peroxide/metabolism
;
Metabolic Networks and Pathways
;
Methionine/metabolism
;
Oxidation-Reduction
;
Protein-Serine-Threonine Kinases/genetics/metabolism
;
Saccharomyces cerevisiae/cytology/*genetics/growth & development/*metabolism
;
Saccharomyces cerevisiae Proteins/genetics/metabolism
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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