DNA-Protein Cross-Linking Sequencing for Genome-Wide Mapping of Thymidine Glycol.
DNA-Protein Cross-Linking Sequencing for Genome-Wide Mapping of Thymidine Glycol.
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DOI:
10.1021/jacs.1c10490
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发表时间:
2022-01-12
影响因子:
15
通讯作者:
Wang Y
中科院分区:
文献类型:
--
作者:
Tang F;Yuan J;Yuan BF;Wang Y
Thymidine glycol (Tg) is the most prevalent form of oxidatively induced pyrimidine lesions in DNA. Tg can arise from direct oxidation of thymidine in DNA. In addition, 5-methyl-2′-deoxycytidine (5-mdC) can be oxidized to 5-mdC glycol, and its subsequent deamination also yields Tg. However, Tg’s distribution in the human genome remains unknown. Here, we presented a DNA–protein cross-linking sequencing (DPC-Seq) method for genome-wide mapping of Tg in human cells. Our approach capitalizes on the specificity of a bifunctional DNA glycosylase, i.e., NTHL1, for the covalent labeling, as well as DPC pulldown, SDS-PAGE fractionation, and membrane transfer for highly efficient and selective enrichment of Tg-bearing DNA. By employing DPC-Seq, we detected thousands of Tg sites in the human genome, where dual ablation of NTHL1 and NEIL1, the major DNA glycosylases responsible for Tg repair, led to pronounced increases in the number of Tg peaks. In addition, Tg is depleted in genomic regions associated with active transcription but enriched at nucleosome-binding sites, especially at heterochromatin sites marked with H3K9me2. Collectively, we developed a DPC-Seq method for highly efficient enrichment of Tg-containing DNA and for genome-wide mapping of Tg in human cells. Our work offers a robust tool for future functional studies of Tg in DNA, and we envision that the method can also be adapted for mapping other modified nucleosides in genomic DNA in the future.
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影响因子:
2.9
作者:
BREIMER, LH;LINDAHL, T
通讯作者:
LINDAHL, T
DOI:
10.1073/pnas.1614430113
发表时间:
2016-10-11
影响因子:
11.1
作者:
Hu, Jinchuan;Lieb, Jason D.;Adar, Sheera
通讯作者:
Adar, Sheera
影响因子:
14.9
作者:
Amente, Stefano;Di Palo, Giacomo;Majello, Barbara
通讯作者:
Majello, Barbara
影响因子:
3.9
作者:
Collins, AR;Cadet, J;Viña, J
通讯作者:
Viña, J
DOI:
10.3791/52118
发表时间:
2015-01-03
期刊:
Journal of visualized experiments : JoVE
影响因子:
--
作者:
Bauer DE;Canver MC;Orkin SH
通讯作者:
Orkin SH