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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.
The proteasome is an...
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Related Experiment Video

Updated: Jan 6, 2026

High-Throughput Cellular Profiling of Targeted Protein Degradation Compounds Using HiBiT CRISPR Cell Lines
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Progress on small-molecule proteolysis-targeting chimeras.

Wenhai Huang1, Beibei Wang1, Zhimin Zhang1

  • 1Key Laboratory of Neuropsychiatric Drug Research of Zhejiang Province, Institute of Materia Medica, Zhejiang Academy of Medical Sciences, Hangzhou, Zhejiang Province 310013, PR China.

Future Medicinal Chemistry
|October 2, 2019
PubMed
Summary
This summary is machine-generated.

Proteolysis-targeting chimeras (PROTACs) offer a novel therapeutic approach by degrading target proteins via the ubiquitin-proteasome system. This review details PROTAC mechanisms, research progress, and future applications in medicine.

Keywords:
E3 ligasesPROTACsdegraderinduced protein degradationsmall moleculesubiquitinproteasome system

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Medicinal Chemistry

Background:

  • Proteolysis-targeting chimeras (PROTACs) are emerging as a significant therapeutic modality.
  • PROTACs leverage the cell's natural protein degradation machinery.

Purpose of the Study:

  • To systematically introduce the mechanism of small-molecule PROTACs.
  • To summarize the research progress of small-molecule PROTACs.
  • To discuss the future prospects and challenges of PROTAC technology.

Main Methods:

  • Review of existing literature on PROTACs.
  • Systematic introduction of PROTAC molecular mechanisms.
  • Summary of current research advancements.

Main Results:

  • PROTACs induce targeted protein degradation by simultaneously recruiting target proteins and E3 ligases.
  • Significant research progress has been made in the development and application of small-molecule PROTACs.
  • The mechanism involves hijacking the ubiquitin-proteasome system for selective protein destruction.

Conclusions:

  • Small-molecule PROTACs represent a promising therapeutic strategy with broad applicability.
  • Further research is needed to overcome existing challenges and fully realize the potential of PROTACs.
  • The field is rapidly advancing, offering new avenues for drug discovery and development.