DNA damage activates signaling cascades driven by the ATM–ATR protein kinases, culminating in the recruitment of repair proteins to the damage site through poorly understood mechanisms. Now a flurry of papers reveals how ATM-dependent phosphorylation of mediator and chromatin-associated proteins at sites of double-strand breaks promotes ubiquitylation of local nucleosomes, thereby eliciting a powerful signal for recruitment of repair complexes to the damage site.
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Bennett, E., Harper, J. DNA damage: ubiquitin marks the spot. Nat Struct Mol Biol 15, 20–22 (2008). https://doi.org/10.1038/nsmb0108-20
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DOI: https://doi.org/10.1038/nsmb0108-20
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