8gf7: Difference between revisions
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== Function == | == Function == | ||
[https://www.uniprot.org/uniprot/SYUA_HUMAN SYUA_HUMAN] May be involved in the regulation of dopamine release and transport. Induces fibrillization of microtubule-associated protein tau. Reduces neuronal responsiveness to various apoptotic stimuli, leading to a decreased caspase-3 activation. | [https://www.uniprot.org/uniprot/SYUA_HUMAN SYUA_HUMAN] May be involved in the regulation of dopamine release and transport. Induces fibrillization of microtubule-associated protein tau. Reduces neuronal responsiveness to various apoptotic stimuli, leading to a decreased caspase-3 activation. | ||
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== Publication Abstract from PubMed == | |||
Amyloid-forming proteins such alpha-synuclein and tau, which are implicated in Alzheimer's and Parkinson's disease, can form different fibril structures or strains with distinct toxic properties, seeding activities and pathology. Understanding the determinants contributing to the formation of different amyloid features could open new avenues for developing disease-specific diagnostics and therapies. Here we report that O-GlcNAc modification of alpha-synuclein monomers results in the formation of amyloid fibril with distinct core structure, as revealed by cryogenic electron microscopy, and diminished seeding activity in seeding-based neuronal and rodent models of Parkinson's disease. Although the mechanisms underpinning the seeding neutralization activity of the O-GlcNAc-modified fibrils remain unclear, our in vitro mechanistic studies indicate that heat shock proteins interactions with O-GlcNAc fibril inhibit their seeding activity, suggesting that the O-GlcNAc modification may alter the interactome of the alpha-synuclein fibrils in ways that lead to reduce seeding activity in vivo. Our results show that posttranslational modifications, such as O-GlcNAc modification, of alpha-synuclein are key determinants of alpha-synuclein amyloid strains and pathogenicity. | |||
O-GlcNAc forces an alpha-synuclein amyloid strain with notably diminished seeding and pathology.,Balana AT, Mahul-Mellier AL, Nguyen BA, Horvath M, Javed A, Hard ER, Jasiqi Y, Singh P, Afrin S, Pedretti R, Singh V, Lee VM, Luk KC, Saelices L, Lashuel HA, Pratt MR Nat Chem Biol. 2024 May;20(5):646-655. doi: 10.1038/s41589-024-01551-2. Epub 2024 , Feb 12. PMID:38347213<ref>PMID:38347213</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
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== References == | == References == | ||
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