Abstract
DNA double-strand breaks (DSBs) are mainly repaired by homologous recombination (HR) and non-homologous end joining (NHEJ). The choice of HR or NHEJ is dictated in part by whether the broken DNA ends are resected to generate extended single-stranded DNA (ssDNA) overhangs, which are quickly bound by the trimeric ssDNA binding complex RPA, the first step of HR. Here we describe a series of protocols for generating Abelson murine leukemia virus-transformed pre-B cells (abl pre-B cells) with stably integrated inducible Cas9 that can be used to identify and study novel pathways regulating DNA end processing. These approaches involve gene inactivation by CRISPR/Cas9, whole genome guide RNA (gRNA) library-mediated screen, and flow cytometry-based detection of chromatin-bound RPA after DNA damage.
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Acknowledgments
B.P.S. is supported by National Institutes of Health grants R01 AI047829 and R01 AI074953.
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Chen, BR., Sleckman, B.P. (2022). A Whole Genome CRISPR/Cas9 Screening Approach for Identifying Genes Encoding DNA End-Processing Proteins. In: Mosammaparast, N. (eds) DNA Damage Responses. Methods in Molecular Biology, vol 2444. Humana, New York, NY. https://doi.org/10.1007/978-1-0716-2063-2_2
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DOI: https://doi.org/10.1007/978-1-0716-2063-2_2
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