相关实验视频
Updated: Jun 24, 2026

Lignin Down-regulation of Zea mays via dsRNAi and Klason Lignin Analysis
Published on: July 23, 2014
红色球分化中的lipoxygenase mRNA沉默: 3'UTR调控复合体控制了60S核糖体亚单元的连接
D H Ostareck1, A Ostareck-Lederer, I N Shatsky
1Gene Expression Programme, European Molecular Biology Laboratory, Meyerhofstrasse 1, D-69117, Heidelberg, Germany.
在发育中的红细胞中,15-氧酶 (LOX) 的翻译被特定的RNA复合体阻断. 这种复合物阻止了蛋白质生产所需的核糖体子单元的结合.
科学领域:
- 分子生物学分子生物学
- 基因规则 基因规则
- 红色素质的形成Erythropoiesis
背景情况:
- 在早期的红色素前体细胞发育过程中,15-氧酶 (LOX) 表达是翻译性沉默的.
- 这种沉默是由一个mRNA-蛋白质综合体介导的,涉及3'未翻译区域 (UTR) 和异质核核核糖核蛋白蛋白 (hnRNP) K和E1.
- 这3'UTR调节复合体抑制翻译启动的确切机制仍然未知.
研究的目的:
- 阐明红色素前体细胞中LOX mRNA转化沉默的机制.
- 为了确定由3'UTR调控复合体抑制的翻译启动中的特定步骤.
- 调查替代翻译启动途径的潜力.
主要方法:
- 在体外对核糖体亚单元招募和扫描LOX mRNA的分析.
- 使用麻痺病毒的IGR-IRES进行翻译启动的研究.
- 生物化学测试以评估80S核糖体的形成.
主要成果:
- 40S核糖体子单元可以被招募并扫描3'UTR,即使沉默复合体被绑定.
- 60S核糖体子单元的结合形成一个具有翻译能力的80S核糖体被沉默复合物抑制.
- 启动可以通过克里克特麻病毒的IGR-IRES来拯救,绕过抑制复合体.
结论:
- LOX mRNA的翻译控制发生在60S核糖体亚单元连接的阶段.
- 具体而言,hNRNP K/E1-3'UTR复合物抑制了80S核糖体的形成.
- 这一发现揭示了翻译启动的新型监管机制,并暗示了潜在的治疗点.
更多相关视频
09:44High-throughput Screening for Chemical Modulators of Post-transcriptionally Regulated Genes
Published on: March 3, 2015
09:21Saccharomyces cerevisiae Metabolic Labeling with 4-thiouracil and the Quantification of Newly Synthesized mRNA As a Proxy for RNA Polymerase II Activity
Published on: October 22, 2018
相关概念视频
Regulation of Expression Occurs at Multiple Steps
Transcription results in the generation of precursor (pre-mRNA) that consists of both exons and introns, which needs further processing before being translated to a...
Riboswitches
The aptamer has high specificity for a particular metabolite which allows riboswitches to specifically regulate...
Regulation of Nuclear Protein Sorting
Regulation of Expression Occurs at Multiple Steps
Transcription results in the generation of precursor (pre-mRNA) that consists of both exons and introns, which needs further processing before being translated to a...
Regulation of Expression at Multiple Steps
Translational Regulation