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Updated: Dec 12, 2025

Functional Characterization of RING-Type E3 Ubiquitin Ligases In Vitro and In Planta
Published on: December 5, 2019
Functional roles of E3 ubiquitin ligases in gastric cancer
Mingliang Wang1, Wei Dai1, Zhangyan Ke2
1Department of General Surgery, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230032, P.R. China.
Abstract:
To date, >650 E3 ubiquitin ligases have been described in humans, including >600 really interesting new genes (RINGs), 28 homologous to E6-associated protein C-terminus (HECTs) and several RING-in-between-RINGs. They are considered key regulators and therapeutic targets of many types of human cancers, including gastric cancer (GC). Among them, some RING and HECT E3 ligases are closely related to the proliferation, infiltration and prognosis of GC. During the past few years, abnormal expressions and functions of many E3 ligases have been identified in GC. However, the functional roles of E3 ligases in GC have not been fully elucidated. The present article focuses on the functional roles of E3 ligases related to the proteasome in GC. In this comprehensive review, the latest research progress on E3 ligases involved in GC and elaborate their structure, classification, functional roles and therapeutic value in GC was summarized. Finally, 30 E3 ligases that serve essential roles in regulating the development of GC were described. Some of these ligases may serve as oncogenes or tumor suppressors in GC, whereas the pathological mechanism of others needs further study; for example, constitutive photomorphogenic 1. In conclusion, the present review demonstrated that E3 ligases are crucial tumor regulatory factors and potential therapeutic targets in GC. Therefore, more studies should focus on the therapeutic targeting of E3 ligases in GC.
Insights
E3 ubiquitin ligases are crucial regulators in human cancers like gastric cancer (GC). This review highlights their roles and therapeutic potential, identifying 30 key ligases involved in GC development.
Area of Science:
- Biochemistry
- Molecular Biology
- Oncology
Background:
- E3 ubiquitin ligases are critical regulators of protein degradation and cellular processes.
- Over 650 E3 ligases exist in humans, categorized into RING, HECT, and RING-in-between-RING families.
- Dysregulation of E3 ligases is implicated in various cancers, including gastric cancer (GC).
Purpose of the Study:
- To comprehensively review the functional roles of proteasome-related E3 ubiquitin ligases in gastric cancer.
- To summarize the latest research on E3 ligases in GC, including their structure, classification, function, and therapeutic value.
- To identify key E3 ligases that could serve as diagnostic markers or therapeutic targets for GC.
Main Methods:
- Literature review of recent research on E3 ubiquitin ligases in gastric cancer.
- Analysis of the structure, classification, and functional mechanisms of E3 ligases.
- Evaluation of the prognostic and therapeutic implications of E3 ligases in GC.
Main Results:
- Abnormal expression and function of numerous E3 ligases have been observed in GC.
- Specific E3 ligases are closely associated with GC cell proliferation, invasion, and patient prognosis.
- Thirty E3 ligases with essential roles in GC development were identified, some acting as oncogenes or tumor suppressors.
Conclusions:
- E3 ubiquitin ligases are pivotal in regulating gastric cancer development and progression.
- These ligases represent promising therapeutic targets for novel anti-cancer strategies in GC.
- Further investigation into the specific roles and mechanisms of E3 ligases in GC is warranted.
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