Abstract
Cells have evolved distinct mechanisms for both preventing and removing mutagenic and lethal DNA damage. Structural and biochemical characterization of key enzymes that function in DNA repair pathways are illuminating the biological and chemical mechanisms that govern initial lesion detection, recognition, and excision repair of damaged DNA. These results are beginning to reveal a higher level of DNA repair coordination that ensures the faithful repair of damaged DNA. Enzyme-induced DNA distortions allow for the specific recognition of distinct extrahelical lesions, as well as tight binding to cleaved products, which has implications for the ordered transfer of unstable DNA repair intermediates between enzymes during base excision repair.
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