Topoisomerase I Plays a Critical Role in Suppressing Genome Instability at a Highly Transcribed G-Quadruplex-Forming Sequence

Topoisomerase I Plays a Critical Role in Suppressing Genome Instability at a Highly Transcribed G-Quadruplex-Forming Sequence . Puja Yadav, Victoria Harcy, Juan Lucas Argueso, Margaret Dominska, Sue Jinks-Robertson, Nayun Kim; PLoS Genet 10(12): e1004839. doi:10.1371/journal.pgen.1004839

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Genomic instability at purine-rich GAA•TTC repeats and CAG•CTG repeats, which can fold into three-stranded H-DNA and a slipped hairpin structure, forms the molecular basis of multiple neurodegenerative diseases, such as Freidreich's Ataxia and Huntington's disease, respectively.