A disease-linked lncRNA mutation in RNase MRP inhibits ribosome synthesis.

A disease-linked lncRNA mutation in RNase MRP inhibits ribosome synthesis.
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DOI:
10.1038/s41467-022-28295-8
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发表时间:
2022-02-03
影响因子:
16.6
通讯作者:
Tollervey D
Tollervey D
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Robertson N;Shchepachev V;Wright D;Turowski TW;Spanos C;Helwak A;Zamoyska R;Tollervey D

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RMRP编码一个非编码的RNA,形成RNase MRP核糖核蛋白复合体的核心。突变会导致软骨毛发发育不良(CHH),其特征是骨骼异常和T细胞活化受损。酵母核糖核酸酶MRP在核糖体合成过程中裂解核糖体前RNA(Pre-rRNA)中的一个特定位置。CRISPR介导的RMRP在人类细胞系中的破坏导致了生长停滞,并伴随着前rRNA的积累。在这里,我们分析了与疾病相关的原代细胞,表明RMRP的突变损害了小鼠T细胞的激活,并推迟了前rRNA的处理。具有CHH相关突变的患者来源的人成纤维细胞显示出类似的前rRNA处理延迟。用最常见的CHH突变(RMRP中的70AG)改造的人类细胞显示出特定的前rRNA加工受损,导致成熟rRNA减少,胞质核糖体与线粒体核糖体的比率降低。此外,70AG突变导致完整的RNase MRP复合体减少。总之,这些结果表明CHH是一种核糖体疾病。非编码RNA RMRP的突变会导致原发免疫缺陷。Robertson等人发现,RMRP中与疾病相关的突变损害了核糖体前RNA的加工,降低了核糖体的丰度,将这种疾病确立为核糖体病。
RMRP encodes a non-coding RNA forming the core of the RNase MRP ribonucleoprotein complex. Mutations cause Cartilage Hair Hypoplasia (CHH), characterized by skeletal abnormalities and impaired T cell activation. Yeast RNase MRP cleaves a specific site in the pre-ribosomal RNA (pre-rRNA) during ribosome synthesis. CRISPR-mediated disruption of RMRP in human cells lines caused growth arrest, with pre-rRNA accumulation. Here, we analyzed disease-relevant primary cells, showing that mutations in RMRP impair mouse T cell activation and delay pre-rRNA processing. Patient-derived human fibroblasts with CHH-linked mutations showed similar pre-rRNA processing delay. Human cells engineered with the most common CHH mutation (70AG in RMRP) show specifically impaired pre-rRNA processing, resulting in reduced mature rRNA and a reduced ratio of cytosolic to mitochondrial ribosomes. Moreover, the 70AG mutation caused a reduction in intact RNase MRP complexes. Together, these results indicate that CHH is a ribosomopathy. Mutations in the non-coding RNA RMRP cause primary immunodeficiency. Robertson et al show that a disease-associated mutation in RMRP impairs pre-ribosomal RNA processing and reduces ribosome abundance, establishing this disorder as a ribosomopathy.
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发表时间: 2018-12
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DOI: 10.1002/j.1460-2075.1994.tb06530.x
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