Analyzing Homologous Recombination at a Genome-Wide Level
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Among the types of damage, DNA double-strand breaks (DSBs) (provoked by various environmental stresses, but also during normal cell metabolic activity) are the most deleterious, as illustrated by the variety of human diseases associated with DSB repair defects. DSBs are repaired by two groups of pathways: homologous recombination (HR) and nonhomologous end joining. These pathways do not trigger the same mutational signatures, and multiple factors, such as cell cycle stage, the complexity of the lesion and also the genomic location, contribute to the choice between these repair pathways. To study the usage of the HR machinery at DSBs, we propose a genome-wide method based on the chromatin immunoprecipitation of the HR core component Rad51, followed by high-throughput sequencing.
Key wordsHomologous recombination DNA double-strand break DNA repair Chromatin immunoprecipitation ChIP-seq Next generation sequencing
Funding in G.L. laboratory is provided by grants from the European Research Council (ERC-2014-CoG 647344), Agence Nationale pour la Recherche (ANR-14-CE10-0002-01), the Institut National contre le Cancer (INCA), and the Ligue Nationale contre le Cancer (LNCC). C.A salary is provided by FRM (Fondation pour la Recherche Medicale) (FRM FDT201904007941).
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