Related Experiment Video
Updated: Aug 4, 2026

Assaying Proteasomal Degradation in a Cell-free System in Plants
Published on: March 26, 2014
The ubiquitin-proteasome pathway in cancer
V Spataro1, C Norbury, A L Harris
1Imperial Cancer Research Fund, University of Oxford, Institute of Molecular Medicine, The John Radcliffe, UK.
Abstract:
Degradation by the 26S proteasome of specific proteins that have been targeted by the ubiquitin pathway is the major intracellular non-lysosomal proteolytic mechanism and is involved in a broad range of processes, such as cell cycle progression, antigen presentation and control of gene expression. Recent work, reviewed here, has shown that this pathway is often the target of cancer-related deregulation and can underlie processes, such as oncogenic transformation, tumour progression, escape from immune surveillance and drug resistance.
Insights
The 26S proteasome, crucial for protein degradation, is frequently deregulated in cancer. This deregulation drives tumor progression, immune evasion, and drug resistance, highlighting its role in oncogenesis.
Area of Science:
- Molecular Biology
- Cell Biology
- Biochemistry
Background:
- The 26S proteasome is the primary non-lysosomal proteolytic pathway.
- It degrades specific proteins targeted by the ubiquitin pathway.
- This process is vital for cellular functions like cell cycle control and gene expression.
Purpose of the Study:
- To review the role of the 26S proteasome pathway in cancer.
- To highlight how deregulation of this pathway contributes to oncogenic processes.
Main Methods:
- Literature review of recent research on the 26S proteasome and cancer.
Main Results:
- The 26S proteasome pathway is a common target for cancer-related deregulation.
- Deregulation underlies key cancer hallmarks including transformation, progression, immune escape, and drug resistance.
Conclusions:
- The ubiquitin-proteasome system is a critical player in cancer development and progression.
- Targeting this pathway offers potential therapeutic strategies for cancer treatment.
Related Concept Videos
The Proteasome
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...
mTOR Signaling and Cancer Progression
The mTOR pathway or the...
The Proteasome
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...
mTOR Signaling and Cancer Progression
The mTOR pathway or the...
The Proteasome
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 (ubiquitin...
The Proteasome Structure
The proteasome is an...

