Rad10 exhibits lesion-dependent genetic requirements for recruitment to DNA double-strand breaks in Saccharomyces cerevisiae

TY - JOUR

T1 - Rad10 exhibits lesion-dependent genetic requirements for recruitment to DNA double-strand breaks in Saccharomyces cerevisiae

AU - Moore, Destaye M

AU - Karlin, Justin

AU - González-Barrera, Sergio

AU - Mardiros, Armen

AU - Lisby, Michael

AU - Doughty, Ana

AU - Gilley, Jennifer

AU - Rothstein, Rodney

AU - Friedberg, Errol C

AU - Fischhaber, Paula L

N1 - Keywords: DNA Breaks, Double-Stranded; Saccharomyces cerevisiae; Saccharomyces cerevisiae Proteins; Single-Strand Specific DNA and RNA Endonucleases

PY - 2009

Y1 - 2009

N2 - In the yeast Saccharomyces cerevisiae, the Rad1-Rad10 protein complex participates in nucleotide excision repair (NER) and homologous recombination (HR). During HR, the Rad1-Rad10 endonuclease cleaves 3' branches of DNA and aberrant 3' DNA ends that are refractory to other 3' processing enzymes. Here we show that yeast strains expressing fluorescently labeled Rad10 protein (Rad10-YFP) form foci in response to double-strand breaks (DSBs) induced by a site-specific restriction enzyme, I-SceI or by ionizing radiation (IR). Additionally, for endonuclease-induced DSBs, Rad10-YFP localization to DSB sites depends on both RAD51 and RAD52, but not MRE11 while IR-induced breaks do not require RAD51. Finally, Rad10-YFP colocalizes with Rad51-CFP and with Rad52-CFP at DSB sites, indicating a temporal overlap of Rad52, Rad51 and Rad10 functions at DSBs. These observations are consistent with a putative role of Rad10 protein in excising overhanging DNA ends after homology searching and refine the potential role(s) of the Rad1-Rad10 complex in DSB repair in yeast.

AB - In the yeast Saccharomyces cerevisiae, the Rad1-Rad10 protein complex participates in nucleotide excision repair (NER) and homologous recombination (HR). During HR, the Rad1-Rad10 endonuclease cleaves 3' branches of DNA and aberrant 3' DNA ends that are refractory to other 3' processing enzymes. Here we show that yeast strains expressing fluorescently labeled Rad10 protein (Rad10-YFP) form foci in response to double-strand breaks (DSBs) induced by a site-specific restriction enzyme, I-SceI or by ionizing radiation (IR). Additionally, for endonuclease-induced DSBs, Rad10-YFP localization to DSB sites depends on both RAD51 and RAD52, but not MRE11 while IR-induced breaks do not require RAD51. Finally, Rad10-YFP colocalizes with Rad51-CFP and with Rad52-CFP at DSB sites, indicating a temporal overlap of Rad52, Rad51 and Rad10 functions at DSBs. These observations are consistent with a putative role of Rad10 protein in excising overhanging DNA ends after homology searching and refine the potential role(s) of the Rad1-Rad10 complex in DSB repair in yeast.

U2 - 10.1093/nar/gkp709

DO - 10.1093/nar/gkp709

M3 - Journal article

C2 - 19729509

SN - 0305-1048

VL - 37

SP - 6429

EP - 6438

JO - Nucleic Acids Research

JF - Nucleic Acids Research

IS - 19

ER -