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Related Concept Videos

The Proteasome01:13

The Proteasome

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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.
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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.
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Regulated Protein Degradation02:58

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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.
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The Proteasome Structure01:17

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The ubiquitin-proteasome pathway is a well-known mechanism utilized by eukaryotic cells to remove cytoplasmic proteins that are misfolded, damaged, or no longer needed. In this pathway, the protein that needs to be eliminated undergoes a process called ubiquitination, where a chain of ubiquitin molecules is attached to the 48th lysine residue of the target protein. This ubiquitin modification helps the proteasome distinguish between a target protein and a healthy protein.
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Updated: Dec 25, 2025

Screening Traditional Chinese Medicine Compounds for Inhibiting UCHL3 Activity Based on Molecular Docking and Deubiquitinating Enzyme Probe Technology
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Screening Traditional Chinese Medicine Compounds for Inhibiting UCHL3 Activity Based on Molecular Docking and Deubiquitinating Enzyme Probe Technology

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Small molecules that target the ubiquitin system.

Hai Qiu Wu1,2, David Baker2, Huib Ovaa1,2

  • 1Oncode Institute, Leiden University Medical Center, 2300 RC Leiden, The Netherlands.

Biochemical Society Transactions
|March 21, 2020
PubMed
Summary
This summary is machine-generated.

Targeting the ubiquitin system, crucial for cellular function and disease, presents therapeutic opportunities. This review examines small molecule inhibitors and challenges in developing novel treatments for various diseases.

Keywords:
PROTACchemical probedrug developmentinhibitorpost-translational modificationubiquitin

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Area of Science:

  • Molecular Biology
  • Cellular Signaling
  • Drug Discovery

Background:

  • Eukaryotic cells rely on complex protein signaling networks for integrity.
  • The ubiquitin system is central to protein regulation, and its dysfunction causes diseases like cancer and neurodegeneration.
  • Understanding ubiquitin system targeting is key for novel therapeutic strategies.

Purpose of the Study:

  • To review the current status of small molecule ubiquitin system inhibitors.
  • To discuss challenges in targeting the ubiquitin system for therapeutic purposes.
  • To explore potential strategies to overcome these challenges.

Main Methods:

  • Literature review of small molecule ubiquitin system inhibitors.
  • Analysis of the ubiquitin system's complexity and therapeutic targeting challenges.
  • Exploration of potential therapeutic strategies.

Main Results:

  • Selected small molecule ubiquitin system inhibitors are presented.
  • Significant challenges exist in targeting the ubiquitin system due to its complexity.
  • Potential strategies for overcoming these challenges are highlighted.

Conclusions:

  • The ubiquitin system is a promising, yet challenging, therapeutic target.
  • Small molecule inhibitors offer potential for treating ubiquitin-related diseases.
  • Further research is needed to effectively harness the ubiquitin system for drug development.