相关实验视频
Updated: Jun 16, 2026

10:55
Purification of Ubiquitinated p53 Proteins from Mammalian Cells
Published on: March 21, 2022
USP10通过对p53进行脱化来调节p53的局部化和稳定性
Jian Yuan1, Kuntian Luo, Lizhi Zhang
1Division of Oncology Research, Department of Oncology, Mayo Clinic, Rochester, MN 55905, USA.
Cell
|January 26, 2010
概括
USP10二基酸 p53,逆转Mdm2诱导的降解和核出口. 这种细胞质蛋白酶在DNA损伤后稳定p53,抑制瘤生长,并为野生类型的p53癌症提供了一个新的目标.
科学领域:
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
- 在瘤学瘤学.
背景情况:
- 蛋白质p53的稳定性和局部化对于其瘤抑制活性至关重要.
- 通过Mdm2介导的全方位化是p53的主要调节剂,诱导其核出口和降解.
- 无处不在的细胞质p53的命运仍然在很大程度上是未知的.
研究的目的:
- 研究USP10在调节p53.3中的作用.
- 阐明USP10影响p53稳定性和局部化的机制.
- 确定USP10在癌症中的功能意义.
主要方法:
- 针对乌比基特异性的蛋白酶测定.
- 西部涂抹以评估蛋白质水平和修改.
- 免疫光学用于追踪蛋白质定位.
- 细胞增殖试验的测定.
- 在透明细胞癌中USP10表达的分析.
主要成果:
- USP10是一种细胞质二维基化酶,可以从p53.5中去除乌比基.
- USP10扭转了Mdm2诱导的核出口和p53.5的降解.
- 在DNA受损后,USP10被稳定并转移到核中,激活p53.
- 在Thr42和Ser337中ATM介导的USP10酸化调节了它的转移和稳定.
- 在野生型p53细胞中,USP10抑制瘤细胞生长.
- 在野生类型p53.5的透明细胞癌中,USP10的下调.
结论:
- USP10是p53稳定性和局部化的新型调节剂.
- USP10 p53的二基化对抗Mdm2介导的调节.
- 在DNA受损后p53的激活抑制了瘤生长.
- USP10代表了野生类型p53.3的癌症的潜在治疗标.
相关概念视频
Abnormal Proliferation
Under normal conditions, most adult cells remain in a non-proliferative state unless stimulated by internal or external factors to replace lost cells. Abnormal cell proliferation is a condition in which the cell's growth exceeds and is uncoordinated with normal cells. In such situations, cell division persists in the same excessive manner even after cessation of the stimuli, leading to persistent tumors. The tumor arises from the damaged cells that replicate to pass the damage to the daughter...
Covalently Linked Protein Regulators
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.
Regulated Protein Degradation
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...
Regulated Protein Degradation
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...
Negative Regulator Molecules
Positive regulators allow a cell to advance through cell cycle checkpoints. Negative regulators have an equally important role as they terminate a cell’s progression through the cell cycle—or pause it—until the cell meets specific criteria.
DNA Damage can Stall the Cell Cycle
In response to DNA damage, cells can pause the cell cycle to assess and repair the breaks. However, the cell must check the DNA at certain critical stages during the cell cycle. If the cell cycle pauses before DNA replication, the cells will contain twice the amount of DNA. On the other hand, if cells arrest after DNA replication but before mitosis, they will contain four times the normal amount of DNA. With a host of specialized proteins at their disposal,cells must use the right protein at...

