Journal
NUCLEIC ACIDS RESEARCH
Volume 43, Issue 5, Pages 2744-2756Publisher
OXFORD UNIV PRESS
DOI: 10.1093/nar/gkv148
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Funding
- National Institute of Environmental Health Sciences [1R21ES020946]
- National Human Genome Research Institute [1R01HG006786]
- CAPES Foundation, Brazil [0138-12-6]
- FAPESP, Brazil [2009/52417-7, 2009/50036-6]
- Department of Radiation Oncology, University of Michigan
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The kinetics of DNA repair and RNA synthesis recovery in human cells following UV-irradiation were assessed using nascent RNA Bru-seq and quantitative long PCR. It was found that UV light inhibited transcription elongation and that recovery of RNA synthesis occurred as a wave in the 5'-3' direction with slow recovery and TC-NER at the 3' end of long genes. RNA synthesis resumed fully at the 3'-end of genes after a 24 h recovery in wild-type fibroblasts, but not in cells deficient in transcription-coupled nucleotide excision repair (TC-NER) or global genomic NER (GG-NER). Different transcription recovery profiles were found for individual genes but these differences did not fully correlate to differences in DNA repair of these genes. Our study gives the first genomewide view of how UV-induced lesions affect transcription and how the recovery of RNA synthesis of large genes are particularly delayed by the apparent lack of resumption of transcription by arrested polymerases.
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