Cell cycle-dependent regulation of double-strand break repair: a role for the CDK.
DNA Double-Strand Breaks (DSBs) are dangerous lesions that can lead to genomic instability and to cell death. Eukaryotic cells repair DSBs either by nonhomologous end joining (NHEJ) or by homologous recombination (HR). Recent work has allowed to study the ability of yeast cells to repair a single, chromosomal DSB, at different stages of the cell cycle. Yeast cells repair the broken chromosome during the G(1) stage only by NHEJ, whereas HR is the mechanism of choice during the rest of the cell cycle. HR does not require duplicated chromatids or passage through S-phase. Control over the fate of the broken chromosome is exerted by Clb-CDK activity, which is required to carry out the first step of HR, ssDNA resection. Similar results in other organisms suggest that this control is a conserved feature in all eukaryotes.
Aylon
Yael
Y
Department of Molecular Microbiology and Biotechnology, Tel Aviv University, Ramat Aviv, Israel.
Kupiec
Martin
M
D002453:Cell Cycle / Q000235:genetics / Q000502:physiology*; D018797:Cell Cycle Proteins / Q000235:genetics / Q000502:physiology; D019457:Chromosome Breakage / Q000235:genetics / Q000502:physiology*; D018844:Cyclin-Dependent Kinases / Q000502:physiology*; D004247:DNA / Q000235:genetics / Q000502:physiology*; D004249:DNA Damage / Q000235:genetics / Q000502:physiology; D004260:DNA Repair / Q000235:genetics / Q000502:physiology*; D004271:DNA, Fungal / Q000235:genetics / Q000502:physiology; D016193:G1 Phase / Q000235:genetics / Q000502:physiology; D015966:Gene Expression Regulation, Fungal; D005800:Genes, Fungal; D042822:Genomic Instability; D009154:Mutation; D011995:Recombination, Genetic; D012441:Saccharomyces cerevisiae / Q000235:genetics
D018797:Cell Cycle Proteins; D004271:DNA, Fungal; D004247:DNA; D018844:Cyclin-Dependent Kinases