Damage-induced lncRNAs control the DNA damage response through interaction with DDRNAs at individual double-strand breaks.

Damage-induced lncRNAs control the DNA damage response through interaction with DDRNAs at individual double-strand breaks.
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损伤诱导的 lncRNA 通过与双链断裂处的 DDRNA 相互作用来控制 DNA 损伤反应。

DOI:
10.1038/ncb3643
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发表时间:
2017-12
影响因子:
21.3
通讯作者:
d'Adda di Fagagna F
d'Adda di Fagagna F
中科院分区:
生物学1区
文献类型:
--
作者:
Michelini F;Pitchiaya S;Vitelli V;Sharma S;Gioia U;Pessina F;Cabrini M;Wang Y;Capozzo I;Iannelli F;Matti V;Francia S;Shivashankar GV;Walter NG;d'Adda di Fagagna F

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DNA损伤反应(DDR)保持了基因组的完整性。被称为ddrna的小非编码rna在DNA双链断裂(dsb)中产生,对DDR激活至关重要。在这里,我们证明了活性DDRNAs以转录依赖的方式特异性地定位于其受损的同源基因组位点。当DNA损伤时,RNA聚合酶II (RNAPII)结合到MRE11/RAD50/NBS1复合体上,被招募到dsb上,从DNA末端和向DNA末端合成损伤诱导的长链非编码RNA (dilncRNAs)。DilncRNAs既作为DDRNA前体,又通过RNA:RNA配对募集DDRNA。dilncRNAs和DDRNAs共同促进DDR病灶形成并与53BP1相关。因此,抑制RNAPII可阻止DDRNA募集、DDR激活和DNA修复。与dilncRNAs和DDRNAs匹配的反义寡核苷酸损害位点特异性DDR病灶形成和DNA修复。我们提出,DDR信号位点除了共享一个共同的蛋白质库外,还单独宿主一组DDR激活所需的独特位点特异性rna。
The DNA damage response (DDR) preserves genomic integrity. Small non-coding RNAs termed DDRNAs are generated at DNA double-strand breaks (DSBs) and are critical for DDR activation. Here we show that active DDRNAs specifically localize to their damaged homologous genomic sites in a transcription-dependent manner. Upon DNA damage, RNA polymerase II (RNAPII) binds to the MRE11/RAD50/NBS1 complex, is recruited to DSBs and synthesizes damage-induced long non-coding RNAs (dilncRNAs) from and towards DNA ends. DilncRNAs act both as DDRNA precursors and by recruiting DDRNAs through RNA:RNA pairing. Together dilncRNAs and DDRNAs fuel DDR focus formation and associate with 53BP1. Accordingly, inhibition of RNAPII prevents DDRNA recruitment, DDR activation and DNA repair. Antisense oligonucleotides matching dilncRNAs and DDRNAs impair site-specific DDR focus formation and DNA repair. We propose that DDR signalling sites, in addition to sharing a common pool of proteins, individually host a unique set of site-specific RNAs necessary for DDR activation.
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发表时间: 2012-03-04
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