Cited by 52Alzheimer's disease research and treatmentsGlycosylation and Glycoproteins ResearchDementia and Cognitive Impairment Research

Differential effects of putative N-glycosylation sites in human Tau on Alzheimer’s disease-related neurodegeneration

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Losev, Yelena, Frenkel-Pinter, Moran, Abu-Hussien, Malak, Viswanathan, Guru Krishnakumar, Elyashiv-Revivo, Donna, Geries, Rana, Khalaila, Isam, Gazit, Ehud +1 more·2021·Cellular and Molecular Life Sciences

Abstract

Amyloid assemblies of Tau are associated with Alzheimer's disease (AD). In AD Tau undergoes several abnormal post-translational modifications, including hyperphosphorylation and glycosylation, which impact disease progression. N-glycosylated Tau was reported to be found in AD brain tissues but not in healthy counterparts. This is surprising since Tau is a cytosolic protein whereas N-glycosylation occurs in the ER-Golgi. Previous in vitro studies indicated that N-glycosylation of Tau facilitated its phosphorylation and contributed to maintenance of its Paired Helical Filament structure. However, the specific Tau residue(s) that undergo N-glycosylation and their effect on Tau-engendered pathology are unknown. High-performance liquid chromatography and mass spectrometry (LC-MS) analysis indicated that both N359 and N410 were N-glycosylated in wild-type (WT) human Tau (hTau) expressed in human SH-SY5Y cells. Asparagine to glutamine mutants, which cannot undergo N-glycosylation, at each of three putative N-glycosylation sites in hTau (N167Q, N359Q, and N410Q) were generated and expressed in SH-SY5Y cells and in transgenic Drosophila. The mutants modulated the levels of hTau phosphorylation in a site-dependent manner in both cell and fly models. Additionally, N359Q ameliorated, whereas N410Q exacerbated various aspects of hTau-engendered neurodegeneration in transgenic flies.

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Crossref · 10.1007/s00018-020-03643-3

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  • Tau undergoes both N-linked glycosylation and O-linked N-acetylglucosaminylation (O-GlcNAcylation), which have been proposed to affect tau phosphorylation and aggregation.

    “In addition, tau also undergoes both N-linked glycosylation (N-glycosylation) [171] and O-linked N-acetylglucosaminylation (O-GlcNAcylation) [172], which have been proposed to affect tau phosphorylation and aggregation [173].”

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Authors
Losev, Y., Frenkel-Pinter, M., Abu-Hussien, M., Viswanathan, G. K., Elyashiv-Revivo, D., Geries, R., Khalaila, I., Gazit, E., & Segal, D.
Affiliations
  • Tel Aviv University (IL)
  • Ben-Gurion University of the Negev (IL)
Corresponding author
Segal, Daniel
Venue
Cellular and Molecular Life Sciences
Published
2020-09-14
Volume
78
Issue
5
Pages
2231-2245
ISSN
  • 1420-682X (ISSN-L)
  • 1420-9071
OpenAlex
W3085498329
Cited by
52
References
71
Citations by year
2026: 6 · 2025: 12 · 2024: 8 · 2023: 10 · 2022: 11 · 2021: 5
FWCI
3.91
Type
journal article
Language
en
Open access
Locations
  • Cellular and Molecular Life Sciences (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Israel Science Foundation
  • Helmholtz Israel Program
  • Alliance Family Foundation
  • Rosetrees Trust
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Glycosylation and Glycoproteins Research
  • Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
Keywords
tau protein, N-glycosylation, Alzheimer's disease, tau hyperphosphorylation, paired helical filaments, neurodegeneration, transgenic Drosophila, SH-SY5Y cells, post-translational modification
MeSH terms
Alzheimer Disease, Animals, Binding Sites, Disease Models, Animal, Drosophila, Glycosylation, Humans, Longevity, Phosphorylation, tau Proteins, Neurodegenerative Diseases, Mutation, Missense, Animals, Genetically Modified, Cell Line, Tumor

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