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Updated: Mar 16, 2026

Characterizing Histone Post-translational Modification Alterations in Yeast Neurodegenerative Proteinopathy Models
Published on: March 24, 2019
O-GlcNAcylation and neurodegeneration
Willayat Y Wani1, John C Chatham1, Victor Darley-Usmar1
1Center for Free Radical Biology, Developmental and Integrative Biology, University of Alabama at Birmingham, United States; Department of Pathology, Developmental and Integrative Biology, University of Alabama at Birmingham, United States.
O-GlcNAcylation, a protein modification, plays a role in neurodegenerative diseases like Alzheimer's. Enhancing O-GlcNAc levels may offer neuroprotection by reducing Tau phosphorylation and toxicity.
Area of Science:
- Biochemistry
- Neuroscience
- Cellular Biology
Background:
- O-GlcNAcylation is a dynamic post-translational modification involving the addition of N-acetylglucosamine to proteins.
- The enzymes O-GlcNAc transferase (OGT) and O-GlcNAcase (OGA) regulate O-GlcNAcylation, with age-dependent expression in the brain.
- Over 1000 O-GlcNAc protein targets are known, influencing diverse cellular processes.
Purpose of the Study:
- To review the role of O-GlcNAcylation in neurodegenerative disease models.
- To explore the potential of modulating O-GlcNAc levels for therapeutic interventions.
Main Methods:
- Literature review of studies on O-GlcNAcylation in neurodegeneration.
- Analysis of findings related to O-GlcNAc modification of Tau protein.
Main Results:
- O-GlcNAcylation of Tau decreases its phosphorylation and toxicity, suggesting a neuroprotective effect.
- Pharmacological elevation of O-GlcNAc is proposed as a potential treatment for Alzheimer's disease.
- Elevated O-GlcNAc levels may also impact protein clearance and apoptosis.
Conclusions:
- O-GlcNAcylation is a critical factor in neurodegenerative processes.
- Targeting O-GlcNAc cycling presents a promising therapeutic avenue for neurodegenerative diseases.
- Further research is needed to fully understand the dual roles of O-GlcNAcylation in neuroprotection and potential adverse effects.
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