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Modifications and loss of bases are frequent types of DNA lesions, often handled by the base excision repair (BER) pathway. BER is initiated by DNA glycosylases, generating abasic (AP) sites that are subsequently cleaved by AP endonucleases, which further pass on nicked DNA to downstream DNA polymerases and ligases. The coordinated handover of cytotoxic intermediates between different BER enzymes...
Mutagenic and cytotoxic apurinic/apyrimidinic (AP) sites are among the most frequent lesions in DNA. Repair of AP sites is initiated by AP endonucleases and most organisms possess two or more of these enzymes. Saccharomyces cerevisiae has AP endonuclease 1 (Apn1) as the major enzymatic activity with AP endonuclease 2 (Apn2) being an important backup. Schizosaccharomyces pombe also encodes two potential...
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