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- W2912993287 abstract "Exposure of genomic, single-stranded DNA (ssDNA) during transcription and replication creates opportunities for the formation of inappropriate secondary structures. Cells manage this exposure by using topoisomerases and helicases to reduce the inherent topological stress that arises from unwinding the double helix and by coating ssDNA with protective protein complexes. Interestingly, specific DNA-RNA hybrids, known as R-loops, form during transcription and exist in homeostasis throughout the genomes of prokaryotes and eukaryotes. These hybrids nucleate from guanine rich clusters in the template strand and extend across GC rich spans of transcribed genes. In vivo regulatory functions have evolved from R-loops, including regulation of gene expression and telomere lengthening. However, they also exist as a form of stress, particularly when replication forks collide with the transcription machinery. New methodologies and models are being developed to delineate the biology of R-loops, including those related to cell stress-based diseases like cancer. As accumulation of R-loops is associated with disease, targeting molecular pathways that regulate their formation or removal could provide new avenues for therapeutic intervention. This review covers recent understandings of the molecular basis for R-loop formation, removal, and biological outcomes in the context of cellular stress." @default.
- W2912993287 created "2019-02-21" @default.
- W2912993287 creator A5057178272 @default.
- W2912993287 creator A5085879776 @default.
- W2912993287 date "2019-02-11" @default.
- W2912993287 modified "2023-10-13" @default.
- W2912993287 title "R-loops: formation, function, and relevance to cell stress" @default.
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- W2912993287 doi "https://doi.org/10.15698/cst2019.02.175" @default.
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