Gene Expression Nebulas
基于标准化流程分析的转录图谱综合数据库

Gene Expression Nebulas

多物种转录图谱整合数据库

PRJNA724033: Nopp140-chaperoned 2’-O-methylation of small nuclear RNAs in Cajal bodies ensures splicing fidelity

来源: NCBI / GSE173171
提交时间: Apr 23 2021
释放时间: Jul 01 2021
最后更新时间: Sep 30 2021

概要: Nopp140-chaperoned 2’-O-methylation of small nuclear RNAs in Cajal bodies ensures splicing fidelity

项目整体设计: Spliceosomal small nuclear RNAs (snRNAs) are modified by small Cajal body (CB) specific ribonucleoproteins (scaRNPs) to ensure snRNP biogenesis and pre-mRNA splicing. However, the function and subcellular site of snRNA modification are largely unknown. We show that CB localization of the protein Nopp140 is essential for concentration of scaRNPs in that nuclear condensate; and that phosphorylation by casein kinase 2 (CK2) at some 80 serines targets Nopp140 to CBs. Transiting through CBs, snRNAs are apparently modified by scaRNPs. Indeed, Nopp140 knockdown-mediated release of scaRNPs from CBs severely compromises 2’-O-methylation of spliceosomal snRNAs, identifying CBs as the site of scaRNP catalysis. Additionally, alternative splicing patterns change indicating that these modifications in U1, U2, U5, and U12 snRNAs safeguard splicing fidelity. Given the importance of CK2 in this pathway, compromised splicing could underlie the mode of action of small molecule CK2 inhibitors currently considered for therapy in cholangiocarcinoma, hematological malignancies, and COVID-19.

GEN 数据集:
GEND000465
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生长方案: -
处理方案: -
提取方案: RNA from the different cell lines was extracted using 500 µl TRIzol Reagent (Ambion) directly on 10-cm dishes (cell confluency ∼80%, ∼1,000,000 cells). Lysed cells in TRIzol were scraped into tubes, extracted twice with chloroform, the RNA was precipitated with 0.7 volume isopropanol after addition of 20 µg glycogen, and resuspended in UltraPure distilled water. RNA concentration and quality were determined by Nanodrop (ratio 260/230 and 260/280 above 1.8) and Agilent 2100 BioAnalyzer (RIN above 8). Total RNA was used for northern blot analysis, RiboMethSeq, and RT-PCR and RNase H analysis.
建库方案: For deep sequencing, total RNA was prepared from 3 separate dishes for each sample and shipped to Novogene Corporation Inc. (Sacramento, CA) for cDNA library preparation (250~300 bp inserts) and Illumina sequencing (PE150). The RNA was prepared and sequenced one year apart in the USA and in China in two batches, one for the P1, KD1a, and KD1b cells and one for the P2 and KD2 cells.
测序信息
分子类型: total RNA
库的片段类型: PAIRED
库的链类型: -
测序平台: ILLUMINA
测序仪型号: Illumina HiSeq 2000
链特异性: Unspecific
样本
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数据来源 GEN样本编号 GEN数据集编号 系列编号 项目编号 样本编号 样本名称 生物样本编号 样本访问号 实验访问号 释放时间 提交时间 最后更新时间 物种 种族 族裔 年龄 年龄单位 性别 来源名称 组织 细胞类型 细胞亚型 细胞系 疾病 疾病状态 发育阶段 突变/变异 表型 Condition Detail 生长方案 处理方案 提取方案 建库方案 分子类型 库的片段类型 链特异性 库的链类型 加标(Spike-In) 测序方法 测序平台 测序仪型号 细胞数 测序片段数 碱基数 平均测序片段长度_1 平均测序片段长度_2 唯一比对率 多重比对率 覆盖度
文章
Cutaneous and systemic hyperinflammation drives maculopapular drug exanthema in severely ill COVID-19 patients.
Allergy . 2021-06-22 [PMID: 34157151]
Nopp140-chaperoned 2'-O-methylation of small nuclear RNAs in Cajal bodies ensures splicing fidelity.
Genes & development . 2021-07-22 [PMID: 34301768]