首页> 美国卫生研究院文献>Epigenetics Chromatin >Decoupling the downstream effects of germline nuclear RNAi reveals that H3K9me3 is dispensable for heritable RNAi and the maintenance of endogenous siRNA-mediated transcriptional silencing in Caenorhabditis elegans
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Decoupling the downstream effects of germline nuclear RNAi reveals that H3K9me3 is dispensable for heritable RNAi and the maintenance of endogenous siRNA-mediated transcriptional silencing in Caenorhabditis elegans

机译:解耦种系核RNAi的下游效应表明H3K9me3可用于遗传性RNAi和秀丽隐杆线虫的内源性siRNA介导的转录沉默的维持

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摘要

BackgroundGermline nuclear RNAi in C. elegans is a transgenerational gene-silencing pathway that leads to H3K9 trimethylation (H3K9me3) and transcriptional silencing at the target genes. H3K9me3 induced by either exogenous double-stranded RNA (dsRNA) or endogenous siRNA (endo-siRNA) is highly specific to the target loci and transgenerationally heritable. Despite these features, the role of H3K9me3 in siRNA-mediated transcriptional silencing and inheritance of the silencing state at native target genes is unclear. In this study, we took combined genetic and whole-genome approaches to address this question.
机译:背景秀丽隐杆线虫的胚核RNAi是一种跨世代的基因沉默途径,可导致H3K9三甲基化(H3K9me3)和目标基因的转录沉默。由外源双链RNA(dsRNA)或内源siRNA(endo-siRNA)诱导的H3K9me3对目标基因座具有高度特异性,并且可遗传遗传。尽管具有这些功能,但尚不清楚H3K9me3在siRNA介导的转录沉默中以及在天然靶基因处沉默状态的遗传中的作用。在这项研究中,我们采取了遗传和全基因组相结合的方法来解决这个问题。

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