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Oxidative damage to mitochondrial DNA (mtDNA) has been implicated as a contributing factor to the origin of many pathological processes. Among the major DNA lesions generated by oxidative stress, 8-oxoguanine (8-oxoG) has a strong mutagenic potential. The main pathway for the repair of this lesion is the base excision repair (BER) initiated by the OGG1 DNA glycosylase. In human cells alternative splicing...
The mammalian endonuclease III homolog NTH1 is a DNA glycosylase/AP lyase that recognizes oxidized pyrimidine bases. Here, we compared the intracellular localization of human and mouse NTH1 and analyzed their sorting signals by examining expression of enhanced green fluorescent protein (EGFP)-tagged NTH1 protein. Full-length hNTH1 was sorted exclusively into nuclei. Deletion analysis showed that two...
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