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ID 113748
Author
D'Angiolella, Vincenzo New York University
Donato, Valerio New York University
Forrester, Frances M. New York University
Jeong, Yeon-Tae New York University
Pellacani, Claudia New York University
Saraf, Anita The Stowers Institute for Medical Research
Florens, Laurence The Stowers Institute for Medical Research
Washburn, Michael P. The Stowers Institute for Medical Research|The University of Kansas
Pagano, Michele New York University|Howard Hughes Medical Institute
Content Type
Journal Article
Description
F-box proteins are the substrate binding subunits of SCF (Skp1-Cul1-F-box protein) ubiquitin ligase complexes. Using affinity purifications and mass spectrometry, we identified RRM2 (the ribonucleotide reductase family member 2) as an interactor of the F-box protein cyclin F. Ribonucleotide reductase (RNR) catalyzes the conversion of ribonucleotides to deoxyribonucleotides (dNTPs), which are necessary for both replicative and repair DNA synthesis. We found that, during G2, following CDK-mediated phosphorylation of Thr33, RRM2 is degraded via SCFcyclin F to maintain balanced dNTP pools and genome stability. After DNA damage, cyclin F is downregulated in an ATR-dependent manner to allow accumulation of RRM2. Defective elimination of cyclin F delays DNA repair and sensitizes cells to DNA damage, a phenotype that is reverted by expressing a nondegradable RRM2 mutant. In summary, we have identified a biochemical pathway that controls the abundance of dNTPs and ensures efficient DNA repair in response to genotoxic stress.
Journal Title
Cell
ISSN
00928674
NCID
AA00600003
AA12024453
Publisher
Elsevier
Volume
149
Issue
5
Start Page
1023
End Page
1034
Published Date
2012-05-25
Rights
Open Archive
EDB ID
DOI (Published Version)
URL ( Publisher's Version )
FullText File
language
eng
TextVersion
Publisher
departments
Oral Sciences