首页> 外文期刊>Chemistry: A European journal >Preferential 5-Methylcytosine Oxidation in the Linker Region of Reconstituted Positioned Nucleosomes by Tet1 Protein
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Preferential 5-Methylcytosine Oxidation in the Linker Region of Reconstituted Positioned Nucleosomes by Tet1 Protein

机译:Tet1蛋白在重组定位核小体的接头区域中发生优选的5-甲基胞嘧啶氧化

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摘要

Tet (ten-eleven translocation) family proteins oxidize 5-methylcytosine (mC) to 5-hydroxymethylcytosine (hmC), 5-formylcytosine (fC), and 5-carboxycytosine (caC), and are suggested to be involved in the active DNA demethylation pathway. In this study, we reconstituted positioned mononucleosomes using CpG-methylated 382bp DNA containing the Widom 601 sequence and recombinant histone octamer, and subjected the nucleosome to treatment with Tet1 protein. The sites of oxidized methylcytosine were identified by bisulfite sequencing. We found that, for the oxidation reaction, Tet1 protein prefers mCs located in the linker region of the nucleosome compared with those located in the core region.
机译:Tet(十一位易位)家族蛋白将5-甲基胞嘧啶(mC)氧化为5-羟甲基胞嘧啶(hmC),5-甲酰基胞嘧啶(fC)和5-羧基胞嘧啶(caC),并建议参与活性DNA脱甲基途径。在这项研究中,我们使用含有Widom 601序列和重组组蛋白八聚体的CpG甲基化382bp DNA重构了定位的单核小体,并对核小体进行了Tet1蛋白处理。通过亚硫酸氢盐测序鉴定氧化的甲基胞嘧啶的位点。我们发现,对于氧化反应,与位于核心区域的mCs相比,Tet1蛋白更喜欢位于核小体的接头区域中的mC。

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