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Updated: Sep 23, 2025

Functional Characterization of RING-Type E3 Ubiquitin Ligases In Vitro and In Planta
Published on: December 5, 2019
The Role of E3 Ligase Pirh2 in Disease
Alexandra Daks1, Olga Fedorova1, Sergey Parfenyev1
1Institute of Cytology RAS, 194064 St. Petersburg, Russia.
Abstract:
The p53-dependent ubiquitin ligase Pirh2 regulates a number of proteins involved in different cancer-associated processes. Targeting the p53 family proteins, Chk2, p27Kip1, Twist1 and others, Pirh2 participates in such cellular processes as proliferation, cell cycle regulation, apoptosis and cellular migration. Thus, it is not surprising that Pirh2 takes part in the initiation and progression of different diseases and pathologies including but not limited to cancer. In this review, we aimed to summarize the available data on Pirh2 regulation, its protein targets and its role in various diseases and pathological processes, thus making the Pirh2 protein a promising therapeutic target.
Insights
The Pirh2 ubiquitin ligase targets key proteins regulating cell functions. This review highlights Pirh2
Area of Science:
- Biochemistry and Molecular Biology
- Oncology
- Cellular Biology
Background:
- Pirh2 (p53-inducible RING-1) is a ubiquitin ligase with a crucial role in cancer.
- It targets numerous proteins involved in cell proliferation, cell cycle, apoptosis, and migration.
- Dysregulation of Pirh2 is implicated in various pathologies, particularly cancer.
Purpose of the Study:
- To review the regulatory mechanisms of Pirh2.
- To identify and summarize Pirh2's diverse protein targets.
- To elucidate Pirh2's role in disease pathogenesis, focusing on cancer.
Main Methods:
- Literature review of studies on Pirh2.
- Analysis of experimental data on Pirh2 targets and functions.
- Synthesis of information on Pirh2's involvement in disease.
Main Results:
- Pirh2 regulates p53 family proteins, Chk2, p27Kip1, and Twist1, among others.
- Pirh2 influences fundamental cellular processes including proliferation, cell cycle control, apoptosis, and migration.
- Pirh2 is demonstrably involved in the initiation and progression of various cancers and other diseases.
Conclusions:
- Pirh2 is a key regulator of critical cellular pathways.
- Its multifaceted role in disease progression underscores its significance.
- Pirh2 represents a promising therapeutic target for cancer and other pathologies.
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