Cited by 266Alzheimer's disease research and treatmentsProtein Kinase Regulation and GTPase SignalingWnt/β-catenin signaling in development and cancer

Glycogen Synthase Kinase 3β Phosphorylates Tau at Both Primed and Unprimed Sites

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Cho, Jae-Hyeon, Johnson, Gail V.W.·2003·Journal of Biological Chemistry

Abstract

Glycogen synthase kinase 3beta (GSK3beta) phosphorylates substrates, including the microtubule-associated protein tau, at both primed and unprimed epitopes. GSK3beta phosphorylation of tau negatively regulates tau-microtubule interactions; however the differential effects of phosphorylation at primed and unprimed epitopes on tau is unknown. To examine the phosphorylation of tau at primed and unprimed epitopes and how this impacts tau function, the R96A mutant of GSK3beta was used, a mutation that prevents phosphorylation of substrates at primed sites. Both GSK3beta and GSK3beta-R96A phosphorylated tau efficiently in situ. However, expression of GSK3beta-R96A resulted in significantly less phosphorylation of tau at primed sites compared with GSK3beta. Conversely, GSK3beta-R96A phosphorylated unprimed tau sites to a significantly greater extent than GSK3beta. Prephosphorylating tau with cdk5/p25 impaired the ability of GSK3beta-R96A to phosphorylate tau, whereas GSK3beta-R96A phosphorylated recombinant tau to a significantly greater extent than GSK3beta. Moreover, the amount of tau associated with microtubules was reduced by overexpression of GSK3beta but only when tau was phosphorylated at primed sites, as phosphorylation of tau by GSK3beta-R96A did not negatively regulate the association of tau with microtubules. These results demonstrate that GSK3beta-mediated phosphorylation of tau at primed sites plays a more significant role in regulating the interaction of tau with micro…

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Crossref · 10.1074/jbc.m206236200

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Authors
Cho, J.-H., & Johnson, G. V. W.
Affiliations
University of Alabama at Birmingham (US)
Corresponding author
Johnson, Gail V.W.
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2003-01
Volume
278
Issue
1
Pages
187-193
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2091014617
Cited by
266
References
5
Citations by year
2026: 6 · 2025: 9 · 2024: 8 · 2023: 10 · 2022: 13 · 2021: 16 · 2020: 11 · 2019: 9 · 2018: 10 · 2017: 9 · 2016: 2 · 2015: 13 · 2014: 14 · 2013: 15 · 2012: 6
FWCI
4.92
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (5r01ns035060-07)
  • National Institute of Neurological Disorders and Stroke (NS35060)
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Kinase Regulation and GTPase Signaling
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Wnt/β-catenin signaling in development and cancer
Keywords
glycogen synthase kinase-3β, tau protein, CDK5/p25, tau phosphorylation, microtubule-associated proteins
MeSH terms
Glycogen Synthase Kinase 3 beta, Animals, Epitopes, Binding Sites, Cell Fractionation, Cricetinae, Microtubules, Mutation, Phosphorylation, Protein Binding, Recombinant Proteins, CHO Cells, tau Proteins, Glycogen Synthase Kinase 3

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