Chabes, A., Stillman, B. (January 2007) Constitutively high dNTP concentration inhibits cell cycle progression and the DNA damage checkpoint in yeast Saccharomyces cerevisiae. Proceedings of the National Academy of Sciences of the United States of America, 104 (4). pp. 1183-1188. ISSN 0027-8424
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Abstract
In eukaryotic cells the concentration of dNTP is highest in S phase and lowest in G1 phase and is controlled by ribonucleotide reductase (RNR). RNR activity is eliminated in all eukaryotes in G1 phase by a variety of mechanisms: transcriptional regulation, small inhibitory proteins, and protein degradation. After activation of RNR upon commitment to S phase, dATP feedback inhibition ensures that the dNTP concentration does not exceed a certain maximal level. It is not apparent why limitation of dNTP concentration is necessary in G1 phase. In principle, dATP feedback inhibition should be sufficient to couple dNTP production to utilization. We demonstrate that in Saccharomyces cerevisiae constitutively high dNTP concentration transiently arrests cell cycle progression in late G1 phase, affects activation of origins of replication, and inhibits the DNA damage checkpoint. We propose that fluctuation of dNTP concentration controls cell cycle progression and the initiation of DNA replication.
| Item Type: | Paper |
|---|---|
| Uncontrolled Keywords: | DNA replication ribonucleotide reductase |
| Subjects: | bioinformatics > genomics and proteomics > genetics & nucleic acid processing > DNA, RNA structure, function, modification > dNTP bioinformatics > genomics and proteomics > genetics & nucleic acid processing > protein structure, function, modification > protein types > enzymes > ribonucleotide reductase |
| CSHL Authors: | |
| Communities: | CSHL labs > Stillman lab |
| Highlight: | Stillman, Bruce W. |
| Depositing User: | CSHL Librarian |
| Date: | 23 January 2007 |
| Date Deposited: | 01 Dec 2011 22:25 |
| Last Modified: | 11 Jan 2018 15:48 |
| PMCID: | PMC1783093 |
| Related URLs: | |
| URI: | https://repository.cshl.edu/id/eprint/22982 |
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