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- W4384816806 abstract "Abstract In addition to being essential for gene expression, transcription is crucial for the maintenance of genome integrity. Here, we undertook a systematic approach, to monitor the assembly kinetics of the pre-initiating RNA Polymerase (Pol) II at promoters at steady state and different stages during recovery from UV irradiation-stress, when pre-initiation and initiation steps have been suggested to be transiently shut down. Taking advantage of the reversible dissociation of pre-initiating Pol II after high salt treatment, we found that de novo recruitment of the available Pol II molecules at active promoters not only persists upon UV at all times tested but occurs significantly faster in the early phase of recovery (2 h) than in unexposed human fibroblasts at the majority of active genes. Our method unveiled groups of genes with significantly different pre-initiation complex (PIC) assembly dynamics after UV that present distinct rates of UV-related mutational signatures in melanoma tumours, providing functional relevance to the importance of keeping transcription initiation active during UV recovery. Our findings uncover novel mechanistic insights further detailing the multilayered transcriptional response to genotoxic stress and link PIC assembly dynamics after exposure to genotoxins with cancer mutational landscapes." @default.
- W4384816806 created "2023-07-21" @default.
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- W4384816806 date "2023-07-20" @default.
- W4384816806 modified "2023-09-24" @default.
- W4384816806 title "Enhanced frequency of transcription pre-initiation complexes assembly after exposure to UV irradiation results in increased repair activity and reduced probabilities for mutagenesis" @default.
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- W4384816806 doi "https://doi.org/10.1093/nar/gkad593" @default.
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