Achieving selectivity in space and time with DNA double-strand-break response and repair: molecular stages and scaffolds come with strings attached
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When double-strand breaks (DSBs) in DNA remain unrepaired, catastrophic loss of genes occurs, leading to translocations, mutations and carcinogenesis. If a sister chromatid is not available at the DNA DSB, nonhomologous end joining (NHEJ) is used to join broken ends. The NHEJ pathway comprises synapsis, end processing and ligation. Here, we ask how DSBs in DNA are repaired efficiently. We suggest that colocation of proteins is achieved over time by the following components: stages, where the main actors are assembled, scaffolds that are erected quickly around broken parts to give access, and strings that tether proteins together. In NHEJ, a
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1572-9001