Abstract
Telomerase counteracts the loss of terminal DNA sequences from chromosome ends; however, it may erroneously add telomeric repeats to DNA double-strand breaks. In this issue, Ouenzar et al. (2017. J. Cell Biol. https://doi.org/10.1083/jcb.201610071) uncover cell cycle-dependent sequestration of the telomerase RNA in nucleoli, a process that excludes telomerase from DNA repair sites.
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