相关实验视频

Updated: Aug 4, 2026

Polysome Fractionation and Analysis of Mammalian Translatomes on a Genome-wide Scale

Polysome Fractionation and Analysis of Mammalian Translatomes on a Genome-wide Scale

Published on: May 17, 2014

eIF2α酸化对小鼠胚胎干细胞转化场景的影响

Mehdi Amiri¹, Stephen J Kiniry², Anthony P Possemato³

¹Department of Biochemistry, McGill University, Montreal, QC H3A 1A3, Canada; Rosalind and Morris Goodman Cancer Institute, McGill University, Montreal, QC H3A 1A3, Canada.

|December 30, 2023

概括

化eIF2α (p-eIF2α) 对于维持小鼠胚胎干细胞 (mESCs) 的天真多能性至关重要. 它的缺失导致多能性丧失,突出了p-eIF2αα.

科学领域:

细胞生物学细胞生物学
发展生物学发展生物学
分子生物学分子生物学

背景情况:

综合应激反应 (ISR) 对于细胞生存至关重要,涉及eIF2α酸化,改变mRNA翻译.
虽然ISR是早期胚胎发生的关键,但其在多能胚胎干细胞 (ESC) 的转化控制中的作用仍然不清楚.

研究的目的:

研究酸化eIF2α (p-eIF2α) 在调节小鼠ESC (mESC) 中的天真多能性的作用.
在多能mESC中使用多omics方法探索eIF2α-依赖的翻译景观.

主要方法:

在野生型 (eIF2α^+/+) 和酸化缺陷突变 (eIF2α^A/A) mESCs中利用了核糖体分析,蛋白质组学和代谢学.
在E4.5小鼠胚胎的原始表皮质层中分析了p-eIF2α水平.

主要成果:

在E4.5原始表皮质体中观察到p-eIF2α的短暂增加.
证明eIF2α酸化的缺失导致2i退出后从天真的多能性退出.
确定p-eIF2α调节了参与多能性,染色体组织和谷氨合成的mRNA的翻译.

结论:

在mESC中,p-eIF2α是天真多能性基因调节网络的关键调节者.
对于维持纯粹的多能性和相关的细胞功能来说,p-eIF2α依赖的翻译是必不可少的.

关键词:

干细胞研究的研究.胚胎干细胞是一种胚胎干细胞.的 p-eIF2α.多能性的多能性.核糖体造型分析是指核糖体造型.翻译控制的翻译控制

更多相关视频

Xenopus laevis as a Model to Identify Translation Impairment

Xenopus laevis as a Model to Identify Translation Impairment

Published on: September 27, 2015

Monitoring eIF4F Assembly by Measuring eIF4E-eIF4G Interaction in Live Cells

Monitoring eIF4F Assembly by Measuring eIF4E-eIF4G Interaction in Live Cells

Published on: May 1, 2020

相关概念视频

Improving Translational Accuracy

Improving Translational Accuracy

Base complementarity between the three base pairs of mRNA codon and the tRNA anticodon is not a failsafe mechanism. Inaccuracies can range from a single mismatch to no correct base pairing at all. The free energy difference between the correct and nearly correct base pairs can be as small as 3 kcal/ mol. With complementarity being the only proofreading step, the estimated error frequency would be one wrong amino acid in every 100 amino acids incorporated. However, error frequencies observed in...