Abstract
A balanced deoxyribonucleotide (dNTP) supply is essential for DNA repair. Here, we found that ribonucleotide reductase (RNR) subunits RRM1 and RRM2 accumulated very rapidly at damage sites. RRM1 bound physically to Tip60. Chromatin immunoprecipitation analyses of cells with an I-SceI cassette revealed that RRM1 bound to a damage site in a Tip60-dependent manner. Active RRM1 mutants lacking Tip60 binding failed to rescue an impaired DNA repair in RRM1-depleted G1-phase cells. Inhibition of RNR recruitment by an RRM1 C-terminal fragment sensitized cells to DNA damage. We propose that Tip60-dependent recruitment of RNR plays an essential role in dNTP supply for DNA repair.
Original language | English |
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Pages (from-to) | 333-338 |
Number of pages | 6 |
Journal | Genes and Development |
Volume | 24 |
Issue number | 4 |
DOIs | |
Publication status | Published - 2010 Feb 15 |
Keywords
- DNA double-strand breaks
- DNA repair
- Genomic instability
- Ribonucleotide reductase
- Tip60
- dNTPs
ASJC Scopus subject areas
- Genetics
- Developmental Biology