Microhomology-mediated end joining (MMEJ) is a mechanism of DNA double-strand-break repair that creates deletions and promotes other types of genome instability. New in vivo and in vitro analyses demonstrate that the heterotrimeric replication protein A (RPA) complex prevents spontaneous annealing of microhomologies, thereby preventing genome-destabilizing MMEJ.
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McVey, M. RPA puts the brakes on MMEJ. Nat Struct Mol Biol 21, 348–349 (2014). https://doi.org/10.1038/nsmb.2802
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DOI: https://doi.org/10.1038/nsmb.2802
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