The pathways and outcomes of mycobacterial NHEJ depend on the structure of the broken DNA ends.

Abstract excerpt

Mycobacteria can repair DNA double-strand breaks (DSBs) via a nonhomologous end-joining (NHEJ) system that includes a dedicated DNA ligase (LigD) and the DNA end-binding protein Ku. Here we exploit an improved plasmid-based NHEJ assay and a collection of Mycobacterium smegmatis strains bearing deletions or mutations in Ku or the DNA ligases to interrogate the contributions of LigD's three catalytic activities...

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