Perlman syndrome nuclease DIS3L2 controls cytoplasmic non-coding RNAs and provides surveillance pathway for maturing snRNAs.

Perlman syndrome nuclease DIS3L2 controls cytoplasmic non-coding RNAs and provides surveillance pathway for maturing snRNAs.
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DOI:
10.1093/nar/gkw649
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发表时间:
2016-12-01
影响因子:
14.9
通讯作者:
Dziembowski A
Dziembowski A
中科院分区:
生物学2区
文献类型:
--
作者:
Łabno A;Warkocki Z;Kuliński T;Krawczyk PS;Bijata K;Tomecki R;Dziembowski A

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Perlman综合征中不依赖于外切体的核糖核酸外切酶DIS 3L 2发生突变。在这里,我们使用了广泛的全球转录组学和靶向生化分析来鉴定人类细胞中的新型DIS 3L 2底物。我们表明DIS 3L 2调节pol II转录本,包括选定的典型和组蛋白编码mRNA,以及来自铁蛋白mRNA 5 'UTR的新型FTL_短RNA。重要的是,DIS 3L 2有助于在成熟snRNA的细胞质加工过程中监视它们。在pol III转录物中,DIS 3L 2特别靶向穹窿和Y RNA以及一个cDNA 200样元件RNA,但不靶向Alu重复序列,这些重复序列被外泌体相关的DIS 3去除。使用3′ RACE-Seq,我们证明了所有新的DIS 3L 2底物在体内都被TUT 4/TUT 7聚(U)聚合酶尿苷酸化。尿苷酸化依赖性DIS 3L 2介导的衰变可以在体外重现,从而加强DIS 3L 2和TUTases之间的紧密合作。总之,这些结果表明,帕尔曼综合征的特征性催化失活的DIS 3L 2可导致其靶RNA的失调以干扰转录组稳态。
The exosome-independent exoribonuclease DIS3L2 is mutated in Perlman syndrome. Here, we used extensive global transcriptomic and targeted biochemical analyses to identify novel DIS3L2 substrates in human cells. We show that DIS3L2 regulates pol II transcripts, comprising selected canonical and histone-coding mRNAs, and a novel FTL_short RNA from the ferritin mRNA 5′ UTR. Importantly, DIS3L2 contributes to surveillance of maturing snRNAs during their cytoplasmic processing. Among pol III transcripts, DIS3L2 particularly targets vault and Y RNAs and an Alu-like element BC200 RNA, but not Alu repeats, which are removed by exosome-associated DIS3. Using 3′ RACE-Seq, we demonstrate that all novel DIS3L2 substrates are uridylated in vivo by TUT4/TUT7 poly(U) polymerases. Uridylation-dependent DIS3L2-mediated decay can be recapitulated in vitro, thus reinforcing the tight cooperation between DIS3L2 and TUTases. Together these results indicate that catalytically inactive DIS3L2, characteristic of Perlman syndrome, can lead to deregulation of its target RNAs to disturb transcriptome homeostasis.
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发表时间: 1987-12-01
影响因子: 11.1
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