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相关概念视频

Regulated Protein Degradation02:58

Regulated Protein Degradation

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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...
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Export of Misfolded Proteins out of the ER01:32

Export of Misfolded Proteins out of the ER

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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...
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The Proteasome02:18

The Proteasome

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Eukaryotic cells can degrade proteins through several pathways. One of the most important amongst 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. A series of enzymes carry out the ubiquitination of the target proteins - E1 (ubiquitin-activating enzyme), E2 (ubiquitin-conjugating enzyme), and E3...
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相关实验视频

Updated: May 21, 2025

Tuning Degradation to Achieve Specific and Efficient Protein Depletion
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POT是一种基于光遗传学的内源蛋白质降解系统.

Yunyue Chen1, Siyifei Wang1, Luhao Zhang1,2

  • 1Department of Biomedical Engineering, MOE Key Laboratory of Biomedical Engineering, State Key Laboratory of Extreme Photonics and Instrumentation, Zhejiang Provincial Key Laboratory of Cardio-Cerebral Vascular Detection Technology and Medicinal Effectiveness Appraisal, Zhejiang University, Hangzhou, Zhejiang, China.

Communications biology
|March 19, 2025
PubMed
概括

研究人员开发了介导的OptoTrim-Away (POT),这是一种使用来快速降解特定内源蛋白质的新型光遗传系统. 这项技术为细胞生物学和潜在疗法控制蛋白质水平提供了一种新方法.

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相关实验视频

Last Updated: May 21, 2025

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科学领域:

  • 分子生物学分子生物学
  • 细胞生物学 细胞生物学
  • 生物技术是生物技术.

背景情况:

  • 精确控制蛋白质水平对于细胞健康和预防疾病至关重要.
  • 光遗传学提供了快速,可逆控制细胞过程的工具.
  • 现有的蛋白质操纵方法在范围和速度上可能受到限制.

研究的目的:

  • 开发一种基于光遗传学的新系统,用于快速和有针对性的内源蛋白质降解.
  • 设计一种能够使用光在各种尺度上控制蛋白质动态的系统.
  • 验证该系统在降解特定标蛋白和影响细胞功能的有效性.

主要方法:

  • 开发使用表达小的胺介导的OptoTrim-Away (POT) 系统.
  • 工程光诱导的E3结合酶TRIM21的寡合化,以触发蛋白质体降解.
  • 创建POT模块 (POT-PI3K,POT-GPX4),使用工程领域 (iSH2,FUNDC1) 针对特定的内源蛋白质 (PI3K,GPX4).
  • 通过活细胞成像和生化实验进行验证.

主要成果:

  • 在对光的反应中,POT系统有效降解了内源PI3K和GPX4蛋白质.
  • POT模块证明了强大的光诱导下调调控癌细胞迁移和增殖.
  • 该系统成功地促进了癌细胞的亡.
  • 活细胞成像和生化分析证实了该系统的有效性.

结论:

  • 该POT系统提供了一种实用和快速的方法来利用光遗传学来操纵内源蛋白质水平.
  • 这项技术可用于剖析复杂的细胞信号通路.
  • POT具有开发向细胞疗法的潜力.