The Ultimate (Mis)match: When DNA Meets RNA.

The Ultimate (Mis)match: When DNA Meets RNA.
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DOI:
10.3390/cells10061433
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发表时间:
2021-06-08
期刊:
影响因子:
6
通讯作者:
Rothstein R
Rothstein R
中科院分区:
生物学2区
文献类型:
--
作者:
Palancade B;Rothstein R

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包含RNA的结构,包括核糖核苷酸插入,DNA:RNA杂交和r环,最近在维持基因组完整性方面发挥了关键作用。引人注目的是,不同的酶活性通常参与基因组维持,有助于它们的产生,它们加工成基因毒性或修复中间体,或它们的去除。在这里,我们回顾了这种底物乱交如何解释基因组代谢过程中RNA插入的有害和有益影响。我们总结了体内和体外实验如何支持DNA聚合酶和同源重组蛋白在含rna结构形成中的作用,并讨论了DNA修复酶在其去除中的作用。受RNA插入影响的途径的多样性可能反映了RNA分子在基因组维持和传播中的祖先功能。
RNA-containing structures, including ribonucleotide insertions, DNA:RNA hybrids and R-loops, have recently emerged as critical players in the maintenance of genome integrity. Strikingly, different enzymatic activities classically involved in genome maintenance contribute to their generation, their processing into genotoxic or repair intermediates, or their removal. Here we review how this substrate promiscuity can account for the detrimental and beneficial impacts of RNA insertions during genome metabolism. We summarize how in vivo and in vitro experiments support the contribution of DNA polymerases and homologous recombination proteins in the formation of RNA-containing structures, and we discuss the role of DNA repair enzymes in their removal. The diversity of pathways that are thus affected by RNA insertions likely reflects the ancestral function of RNA molecules in genome maintenance and transmission.
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