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Published on: January 7, 2019
Essential role of O-GlcNAcylation in stabilization of oncogenic factors
Vivek Makwana1, Philip Ryan1, Bhautikkumar Patel1
1School of Pharmacy and Pharmacology, Griffith University, Gold Coast, Queensland 4222, Australia.
Abstract:
A reversible post-translational protein modification which involves addition of N-acetylglucosamine (GlcNAc) onto hydroxyl groups of serine and/or threonine residues which is known as O-GlcNAcylation, has emerged as a potent competitor of phosphorylation. This glycosyltransfer reaction is catalyzed by the enzyme O-linked β-N-acetylglucosamine transferase (OGT). This enzyme uses uridine diphosphate N-acetylglucosamine (UDP-GlcNAc), the end product of hexosamine biosynthetic pathway, to modify numerous nuclear and cytosolic proteins. O-GlcNAcylation influences cancer cell metabolism in such a way that hyper-O-GlcNAcylation is considered as a prominent trait of many cancers, and is proposed as a major factor enabling cancer cell proliferation and progression. Growing evidence supports a connection between O-GlcNAcylation and major oncogenic factors, including for example, c-MYC, HIF-1α, and NF-κB. A comprehensive study of the roles of O-GlcNAc modification of oncogenic factors is warranted as a thorough understanding may help drive advances in cancer diagnosis and therapy. The focus of this article is to highlight the interplay between oncogenic factors and O-GlcNAcylation along with OGT in cancer cell proliferation and survival. The prospects for OGT inhibitors will also be discussed.
Insights
O-GlcNAcylation, a protein modification, competes with phosphorylation and drives cancer progression by affecting oncogenic factors. Understanding this process may lead to new cancer therapies targeting O-GlcNAc transferase (OGT).
Area of Science:
- Biochemistry
- Molecular Biology
- Cancer Biology
Background:
- O-GlcNAcylation is a reversible post-translational modification.
- It competes with phosphorylation and is catalyzed by O-linked β-N-acetylglucosamine transferase (OGT).
- Hyper-O-GlcNAcylation is a hallmark of many cancers, promoting proliferation and progression.
Purpose of the Study:
- To highlight the interplay between oncogenic factors and O-GlcNAcylation.
- To explore the role of OGT in cancer cell proliferation and survival.
- To discuss the therapeutic potential of OGT inhibitors in cancer treatment.
Main Methods:
- Review of existing literature on O-GlcNAcylation and cancer.
- Analysis of the connection between O-GlcNAcylation and key oncogenic factors (e.g., c-MYC, HIF-1α, NF-κB).
- Discussion of the enzymatic activity of OGT and its role in cancer metabolism.
Main Results:
- O-GlcNAcylation significantly influences cancer cell metabolism and proliferation.
- O-GlcNAcylation is linked to major oncogenic factors crucial for cancer progression.
- OGT plays a critical role in mediating these effects.
Conclusions:
- O-GlcNAcylation is a key regulator of cancer cell proliferation and survival.
- Targeting OGT may offer a promising therapeutic strategy for various cancers.
- Further research into O-GlcNAc modification of oncogenic factors is warranted for improved cancer diagnosis and therapy.
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