
Cell:发现一种启动细胞内有缺陷的蛋白靶向降解的新机制 - 生物 …
2023年6月25日 · 在一项新的研究中,来自德国马克斯-普朗克生物化学研究所的研究人员如今发现了一种能够启动有缺陷的蛋白的靶向降解的新机制。 蛋白GCN1在这一过程中是至关重要的。 相关研究结果于2023年6月19日在线发表在Cell期刊上,论文标题为“Mechanisms of readthrough mitigation reveal principles of GCN1-mediated translational quality control”。 核糖体是制造我们细胞中所有蛋白的分子机器。 有机体的遗传密码经转录后产生所谓的信使RNA(mRNA)。 核 …
Ribosome binding protein GCN1 regulates the cell cycle and …
2020年4月23日 · Our results demonstrated, for the first time, that GCN1 is essential for both GCN2-dependent stress response and GCN2-independent cell cycle regulation. The stress response at the translational level is an energetically cost-saving mechanism because translation consumes a considerable amount of energy.
Mechanisms of readthrough mitigation reveal principles of GCN1 …
2023年6月19日 · GCN1 engages these ribosomes and stabilizes disomes, thereby increasing time available for membrane protein assembly and/or association of chaperones for cotranslational folding. Prolonged ribosome (disome) dwell times, due to biogenesis problems that remain unresolved, may recruit CCR4/NOT to initiate mRNA degradation, thereby limiting ...
An E3 ligase network engages GCN1 to promote the degradation …
2023年1月12日 · We discovered that the elongation factor-1α (eEF1A) inhibitor, ternatin-4, triggers the ubiquitination and degradation of eEF1A on stalled ribosomes. Using a chemical genetic approach, we unveiled a signaling network comprising two E3 ligases, RNF14 and RNF25, which are required for eEF1A degradation.
An E3 ligase network engages GCN1 to promote the degradation …
2023年1月19日 · The ribosome collision sensor GCN1 plays an essential role by engaging RNF14, which directly ubiquitinates eEF1A. The site-specific, RNF25-dependent ubiquitination of the ribosomal protein RPS27A/eS31 provides a second essential signaling input.
Circadian clock control of interactions between eIF2α kinase CPC …
Cells expressing either epitope-tagged CPC-3 (CPC3::V5) or GCN1 (GCN1::HA) were harvested after 18 h of growth in DD (DD18), which corresponds to subjective day and the time of peak CPC-3 activity (15, 16). Proteins were cross-linked with formaldehyde 1 h before harvest.
Ribosome binding protein GCN1 regulates the cell cycle and cell ...
2020年4月23日 · Our results demonstrated, for the first time, that GCN1 is essential for both GCN2-dependent stress response and GCN2-independent cell cycle regulation.
Exploring the multifaceted role of GCN1: Implications in cellular ...
2024年6月1日 · GCN1 is a highly conserved protein present widely across eukaryotes. As an upstream activator of protein kinase GCN2, GCN1 plays a pivotal role in integrated stress responses, such as amino acid starvation and oxidative stress.
核糖体结合蛋白GCN1调节细胞周期和细胞增殖,对于小鼠的胚胎 …
通过将孕酮给予怀孕的母亲延长妊娠24小时,可以挽救肺中分化标志物的表达并防止Gcn1ΔRWDBD幼仔的致死性,这表明Gcn1ΔRWDBD胚胎的围产期致死性是由于简单的发育迟缓所致。 与酵母Gcn2 / Gcn1系统类似,在Gcn1ΔRWDBD小鼠胚胎成纤维细胞(MEF)中,AAS或UV辐射诱导的elF2α磷酸化程度降低,表明GCN1 RWDBD负责GCN2活性。 此外,我们发现减少的细胞增殖和G2 / M阻滞伴随着Gcn1ΔRWDBDMEF中Cdk1和细胞周期蛋白B1的减少。 我们 …
<br>探索 GCN1 的多方面作用:对细胞反应和疾病 ... - X-MOL
通过与 gcn2 相互作用,gcn1 促进 gcn2 的激活,从而启动响应细胞应激源的下游信号级联反应。 在这些情况下,GCN2 的激活需要 GCN1 的存在和作用。 值得注意的是,GCN1 还作为核糖体碰撞传感器发挥作用,对翻译质量控制途径做出了重大贡献。