Abstract

Mammalian telomeres are guanine-rich sequences which cap the ends of linear chromosomes. While recognized as sites sensitive to oxidative stress, studies on the consequences of oxidative damage to telomeres have been primarily limited to experimental conditions which cause oxidative damage throughout the whole genome and cell. We developed a chemoptogenetic tool (FAP-mCER-TRF1) to specifically induce singlet oxygen at telomeres, resulting in the formation of the common oxidative lesion 8-oxo-guanine. Here, we describe this tool and detail how to generate cell lines which express FAP-mCER-TRF1 at telomeres and verify the formation of 8-oxo-guanine.

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