RNA结合蛋白 hnRNPM 和 ELAVL1 促进核酸传感器cGAS 和 RIG-I 下游的 I 型干扰素诱导
Alexander Kirchhoff1, Anna-Maria Herzner2,3, Christian Urban4
1Institute of Clinical Chemistry and Clinical Pharmacology, University Hospital Bonn, Bonn, Germany. alkirchhoff@web.de.
The EMBO journal
|December 20, 2024
概括
研究人员发现了 hnRNPM 和 ELAVL1 桥梁关键的抗病毒途径,增强了 I 型干扰素反应. 这种RNA结合蛋白质复合体为自身免疫I型干扰性疾病提供了潜在的治疗点.
科学领域:
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
- 病毒学 病毒学
背景情况:
- 细胞质传感器RIG-I (RNA) 和cGAS (DNA) 触发了I型干扰素免疫.
- 这些 IKK 类激酶的上游路径之间的连接仍然未被探索.
研究的目的:
- 识别桥梁cGAS和RIG-I通路的新型调节器.
- 描述 hnRNPM 和 ELAVL1 在抗病毒免疫反应中的作用.
主要方法:
- 相互作用组分析和基因组编辑以确定蛋白质相互作用.
- 病毒感染模型 (HSV-1,仙台病毒) 用于评估免疫反应.
- 同焦显微镜可视化蛋白质定位.
- 在患者衍生细胞中进行药理抑制测定.
主要成果:
- hnRNPM被确定为IRF3酸化和cGAS和RIG-I下游的I型IFN诱导的积极调节者.
- ELAVL1 (HuR) 被确定为一个hnnRNPM交互器.
- 在 hnRNPM 或 ELAVL1 的耗尽会损害 I 型 IFN 诱导.
- hnRNPM 和 ELAVL1 与关键信号激酶 (TBK1,IKKε,IKKβ) 和NF-κB p65.1 相互作用.
- 药理上抑制ELAVL1可以减少I型干扰性纤维细胞中细胞因子的释放.
结论:
- hnRNPM和ELAVL1是第一个连接cGAS/STING和RIG-I/MAVS通道的非冗余调节器.
- 在 hnRNPM-ELAVL1 复合体促进抗病毒防御.
- 这种复合体代表了I型干扰性疾病的潜在治疗标.
相关概念视频
RNA Interference
25.9K
RNA interference (RNAi) is a process in which a small non-coding RNA molecule blocks the post-transcriptional expression of a gene by binding to its messenger RNA (mRNA) and preventing the protein from being translated.
This process occurs naturally in cells, often through the activity of genomically-encoded microRNAs. Researchers can take advantage of this mechanism by introducing synthetic RNAs to deactivate specific genes for research or therapeutic purposes. For example, RNAi could be used...
This process occurs naturally in cells, often through the activity of genomically-encoded microRNAs. Researchers can take advantage of this mechanism by introducing synthetic RNAs to deactivate specific genes for research or therapeutic purposes. For example, RNAi could be used...
25.9K
Types of RNA
63.2K
Overview
Three main types of RNA are involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). These RNAs perform diverse functions and can be broadly classified as protein-coding or non-coding RNA. Non-coding RNAs play important roles in the regulation of gene expression in response to developmental and environmental changes. Non-coding RNAs in prokaryotes can be manipulated to develop more effective antibacterial drugs for human or animal use.
RNA...
Three main types of RNA are involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). These RNAs perform diverse functions and can be broadly classified as protein-coding or non-coding RNA. Non-coding RNAs play important roles in the regulation of gene expression in response to developmental and environmental changes. Non-coding RNAs in prokaryotes can be manipulated to develop more effective antibacterial drugs for human or animal use.
RNA...
63.2K
siRNA - Small Interfering RNAs
16.6K
Small interfering RNAs, or siRNAs, are short regulatory RNA molecules that can silence genes post-transcriptionally, as well as the transcriptional level in some cases. siRNAs are important for protecting cells against viral infections and silencing transposable genetic elements.
In the cytoplasm, siRNA is processed from a double-stranded RNA, which comes from either endogenous DNA transcription or exogenous sources like a virus. This double-stranded RNA is then cleaved by the...
In the cytoplasm, siRNA is processed from a double-stranded RNA, which comes from either endogenous DNA transcription or exogenous sources like a virus. This double-stranded RNA is then cleaved by the...
16.6K
Regulation of the Unfolded Protein Response
2.4K
Inositol-requiring kinase one or IRE1 is the most conserved eukaryotic unfolded protein response (UPR) receptor. It is a type I transmembrane protein kinase receptor with a distinctive site-specific RNase activity. As the binding mechanics of the misfolded proteins with the N-terminal domain of IRE-1 are unclear, three binding models — direct, indirect, and allosteric -- are proposed for receptor activation. Nevertheless, it is known that once a misfolded protein associates with IRE1, it...
2.4K
Riboswitches
8.0K
Riboswitches are non-coding mRNA domains that regulate the transcription and translation of downstream genes without the help of proteins. Riboswitches bind directly to a metabolite and can form unique stem-loop or hairpin structures in response to the amount of the metabolite present. They have two distinct regions – a metabolite-binding aptamer and an expression platform.
The aptamer has high specificity for a particular metabolite which allows riboswitches to specifically regulate...
The aptamer has high specificity for a particular metabolite which allows riboswitches to specifically regulate...
8.0K
Experimental RNAi
6.0K
RNA interference (RNAi) is a cellular mechanism that inhibits gene expression by suppressing its transcription or activating the RNA degradation process. The mechanism was discovered by Andrew Fire and Craig Mello in 1998 in plants. Today, it is observed in almost all eukaryotes, including protozoa, flies, nematodes, insects, parasites, and mammals. This precise cellular mechanism of gene silencing has been developed into a technique that provides an efficient way to identify and determine the...
6.0K


