相关实验视频
Updated: Sep 16, 2025

06:06
In Vitro Analysis of E3 Ubiquitin Ligase Function
Published on: May 14, 2021
5.4K
赛宾调节K63结合的多基化,以塑造突触内容
Srinivasa R Gandu1,2, Ana R Rodriguez3, Jared Lamp4
1Department of Cell Biology and Neuroscience, Rutgers University, Piscataway, NJ, USA.
Science advances
|July 11, 2025
概括
这项研究揭示了由cypin介导的K63-polyubiquitin (K63-polyUb) 修饰如何调节突触功能. 这种蛋白质修饰影响突触的两侧,为神经元信号机制提供了新的见解.
科学领域:
- 神经科学是一个神经科学.
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
背景情况:
- 蛋白质的翻译后修改对于突触部位向至关重要.
- 多比基因化,特别是K63-多比基因 (K63-polyUb) 链接,已知在信号转导中的作用,但其在神经元信号传递中的功能尚未得到充分探索.
- 细胞质蛋白cypin是PSD-95的交互因子,研究其在突触调节中的作用.
研究的目的:
- 为了研究cypin促进的K63-多比基化在调节突触内容和功能的作用.
- 探索K63-多比基因化对前和后突触区的影响.
- 阐明神经元信号传递在发育过程中和成年大脑中的新机制.
主要方法:
- 在体外神经元发育研究.
- 使用成年小鼠的体内研究.
- 在 postsynaptic 蛋白质上识别cypin介导的K63-polyubiquitination.
主要成果:
- 赛宾促进K63-多基化在后突触蛋白质上.
- 赛宾在前突触功能中起着重要作用.
- 在K63-polyubiquitination中介于cypin的改变会影响突触内容和双边功能.
结论:
- 赛宾促进的K63-多比基化是突触内容和功能的关键调节剂.
- 这种调节发生在突触的前和后突触两侧.
- 这些发现为神经元信号传递和突触可塑性的基本机制提供了新的见解.
相关概念视频
Covalently Linked Protein Regulators
7.3K
Proteins can undergo many types of post-translational modifications, often in response to changes in their environment. These modifications play an important role in the function and stability of these proteins. Covalently linked molecules include functional groups, such as methyl, acetyl, and phosphate groups, and also small proteins, such as ubiquitin. There are around 200 different types of covalent regulators that have been identified.
These groups modify specific amino acids in a protein....
These groups modify specific amino acids in a protein....
7.3K
Regulated Protein Degradation
7.7K
It is vital to regulate the activity of enzymatic as well as non-enzymatic proteins inside the cell. This can be achieved either through creating a balance between their rate of synthesis and degradation or regulating the intrinsic activity of the protein. Both these regulation mechanisms play an essential role in the normal functioning of cells.
Protein degradation plays two important roles in the cells. It helps to protect cells from misfolded or damaged proteins before they lead to a...
Protein degradation plays two important roles in the cells. It helps to protect cells from misfolded or damaged proteins before they lead to a...
7.7K
Regulation of Expression at Multiple Steps
1.0K
The gene expression in cells is regulated at different stages: (i) transcription, (ii) RNA processing, (iii) RNA localization, and (iv) translation. Transcriptional regulation is mediated by regulatory proteins such as transcription factors, activators, or repressors—these control gene expression by initiating or inhibiting the transcription of genes. Once a precursor or pre-mRNA is produced, it undergoes post-transcriptional modification, including 5' capping, splicing, and the...
1.0K
The Proteasome
1.2K
Eukaryotic cells can degrade proteins through several pathways. One of the most important among these is the ubiquitin-proteasome pathway. It helps the cell eliminate the misfolded, damaged, or unwarranted cytoplasmic proteins in a highly specific manner.
In this pathway, the target proteins are first tagged with small proteins called ubiquitin. This involves participation of a series of enzymes including— E1 (ubiquitin-activating enzyme), E2 (ubiquitin-conjugating enzyme), and E3...
In this pathway, the target proteins are first tagged with small proteins called ubiquitin. This involves participation of a series of enzymes including— E1 (ubiquitin-activating enzyme), E2 (ubiquitin-conjugating enzyme), and E3...
1.2K
Anaphase Promoting Complex
3.0K
The stepwise destruction of specific proteins is necessary for the progression and completion of the cell cycle. Such proteins are ubiquitinated by ubiquitin ligases and then subsequently destroyed by the proteasome. The SCF (Skp1/Cullin/F-box) and the anaphase-promoting complex (APC) are two important ubiquitin ligases involved in cell cycle progression. While SCF is active throughout the cell cycle, APC gets activated during metaphase to anaphase transition. Cdc20 or Cdh1 binds to APC and...
3.0K
ER Retrieval Pathway
3.9K
In the secretory pathway, vesicles transport proteins from one cellular compartment to another in forward transport to deliver the protein to its correct location. Occasionally, misfolded proteins and incorrect proteins escape their original compartments, and a retrieval pathway is used to return the escaped proteins to their original compartment.
The ER uses many checkpoints to prevent the entry of incorrectly folded or a resident protein as cargo onto a transport vesicle. These mechanisms...
The ER uses many checkpoints to prevent the entry of incorrectly folded or a resident protein as cargo onto a transport vesicle. These mechanisms...
3.9K

