在病理条件下的长期非编码RNA介导的细胞内网膜应激的调制
Yusuf Cem Çiftçi1, Yiğit Yurtsever1, Bünyamin Akgül1
1Noncoding RNA Laboratory, Department of Molecular Biology and Genetics, Izmir Institute of Technology, Izmir, Turkey.
Journal of cellular and molecular medicine
|July 29, 2024
概括
长非编码RNAs (lncRNAs) 有助于调节未折叠的蛋白质反应 (UPR),以管理内质网膜 (ER) 的压力. 它们的失调与疾病有关,使它们成为潜在的治疗点.
科学领域:
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
- 基因组学就是基因组学.
背景情况:
- 细胞内膜网膜 (ER) 的压力源于蛋白质的错误折叠,触发了未折叠的蛋白质反应 (UPR),以维持细胞平衡.
- ER压力与各种疾病有关,需要对其分子调节有深入的了解.
- 长非编码RNAs (lncRNAs) 是细胞过程的关键调节者,包括UPR.
研究的目的:
- 探索 lncRNAs 在调节 UPR 和 ER 稳态中的作用.
- 调查 lncRNA 失调和 ER 与压力相关的病理之间的联系.
- 巩固当前的知识,并确定在lncRNAs和ER压力领域的未来研究方向.
主要方法:
- 文献综述和对 lncRNAs 和 ER 压力现有研究的全面分析.
- 检查 lncRNA 与蛋白质和核酸相互作用的分子机制,以微调 UPR.
- 对研究的分析,这些研究将lncRNA失调与ER压力相关疾病的进展联系起来.
主要成果:
- lncRNAs通过各种机制在微调UPR中发挥着至关重要的作用,以恢复ER平衡.
- 特定的lncRNAs的失调与ER压力相关疾病的发病有显著的关联.
- lncRNAs和ER压力的相互作用是复杂的,对于理解疾病机制至关重要.
结论:
- lncRNAs是UPR的重要调节器,并与ER与压力相关的疾病有关.
- 了解ER压力中的lncRNA功能为新的治疗策略提供了潜力.
- 需要进一步的研究,以充分阐明lncRNAs在ER压力和疾病中的多方面的作用.
相关概念视频
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
The Unfolded Protein Response
4.5K
The ER is the hub of protein synthesis in a cell. It has robust systems to quality control protein folding and also for degradation of terminally misfolded proteins. Under normal conditions, a small proportion of misfolded proteins that cannot be salvaged need to be transported to the cytoplasm by the ER-associated degradation or ERAD pathways. However, if the ERAD cannot handle the misfolded proteins, the cell activates the unfolded protein response or UPR to adjust the protein folding...
4.5K
Export of Misfolded Proteins out of the ER
3.6K
After folding, the ER assesses the quality of secretory and membrane proteins. The correctly folded proteins are cleared by the calnexin cycle for transport to their final destination, while misfolded proteins are held back in the ER lumen. The ER chaperones attempt to unfold and refold the misfolded proteins but sometimes fail to achieve the correct native conformation. Such terminally misfolded proteins are then exported to the cytosol by ER-associated degradation or ERAD pathway for...
3.6K
Role of ER in the Secretory Pathway
5.3K
Eukaryotic cells have a special pathway that enables communication between various intracellular membrane-bound compartments and also with the extracellular environment. This pathway is termed as the secretory pathway.
Components of the secretory pathway
About a third of proteins synthesized in the cell are sorted via the secretory route. They shuffle between different compartments in membrane-bound vesicles until they reach their final destination. The main intracellular compartments involved...
Components of the secretory pathway
About a third of proteins synthesized in the cell are sorted via the secretory route. They shuffle between different compartments in membrane-bound vesicles until they reach their final destination. The main intracellular compartments involved...
5.3K
Protein Modifications in the RER
5.1K
Modification of secretory and transmembrane proteins entering the rough ER begins in the ER lumen. These modifications aid in protein folding and stabilize the acquired tertiary structure. Protein modifications in the rough ER co-occur at different stages of protein folding.
Broadly, these modifications can be categorized into four main categories — glycosylation, formation of disulfide bonds, assembly of protein subunits, and specific proteolytic cleavages like removal of signal...
Broadly, these modifications can be categorized into four main categories — glycosylation, formation of disulfide bonds, assembly of protein subunits, and specific proteolytic cleavages like removal of signal...
5.1K
Protein Folding Quality Check in the RER
3.7K
ER is the primary site for the maturation and folding of soluble and transmembrane secretory proteins. The calnexin cycle is a specific chaperone system that folds and assesses the confirmation of N-glycosylated proteins before they can exit the ER lumen. The primary players of this quality check pipeline are the lectins, ER-resident chaperones, and a glucosyl transferase enzyme. In case the calnexin system in the lumen fails to salvage a misfolded protein, it is transported to the cytoplasm...
3.7K


