Cited by 296Neuroscience and Neuropharmacology ResearchCellular transport and secretionReceptor Mechanisms and Signaling

The DOI matches its Crossref record; 28 of the 28 references it cites were found in a registry or an index.

Tyrosine phosphorylation of GluR2 is required for insulin-stimulated AMPA receptor endocytosis and LTD

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Abstract

The alpha-amino-3-hydroxy-5-methylisoxazole-4-propionic acid (AMPA) subtype of glutamate receptors is subject to functionally distinct constitutive and regulated clathrin-dependent endocytosis, contributing to various forms of synaptic plasticity. In HEK293 cells transiently expressing GluR1 or GluR2 mutants containing domain deletions or point mutations in their intracellular carboxyl termini (CT), we found that deletion of the first 10 amino acids (834-843) selectively reduced the rate of constitutive AMPA receptor endocytosis, whereas truncation of the last 15 amino acids of the GluR2 CT, or point mutation of the tyrosine residues in this region, only eliminated the regulated (insulin-stimulated) endocytosis. Moreover, in hippocampal slices, both insulin treatment and low-frequency stimulation (LFS) specifically stimulated tyrosine phosphorylation of the GluR2 subunits of native AMPA receptors, and the enhanced phosphorylation appears necessary for both insulin- and LFS-induced long-term depression of AMPA receptor-mediated excitatory postsynaptic currents. Thus, our results demonstrate that constitutive and regulated AMPA receptor endocytosis requires different sequences within GluR CTs and tyrosine phosphorylation of GluR2 CT is required for the regulated AMPA receptor endocytosis and hence the expression of certain forms of synaptic plasticity.

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Metadata

Authors
Ahmadian, G., Ju, W., Liu, L., Wyszynski, M., Lee, S. H., Dunah, A. W., Taghibiglou, C., Wang, Y., Lu, J., Wong, T. P., Sheng, M., & Wang, Y. T.
Affiliations
  • National Institute of Genetic Engineering and Biotechnology (IR)
  • University of British Columbia (CA)
  • Howard Hughes Medical Institute (US)
Corresponding author
Wang, Yu Tian
Venue
The EMBO Journal
Published
2004-02-19
Volume
23
Issue
5
Pages
1040-1050
ISSN
  • 0261-4189 (ISSN-L)
  • 1460-2075
OpenAlex
W2141680511
Cited by
296
References
28
Citations by year
2026: 8 · 2025: 2 · 2024: 9 · 2023: 3 · 2022: 7 · 2021: 13 · 2020: 15 · 2019: 14 · 2018: 18 · 2017: 9 · 2016: 14 · 2015: 11 · 2014: 16 · 2013: 25 · 2012: 18
FWCI
5.55
Type
journal article
Language
en
Open access
Locations
  • The EMBO Journal (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Heart and Stroke Foundation of Canada
  • National Institutes of Health
  • Canadian Institutes of Health Research
  • National Institute of Neurological Disorders and Stroke (NS 35050, R01NS035050)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Cellular transport and secretion
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Receptor Mechanisms and Signaling
Keywords
AMPA receptors, GluR2, tyrosine phosphorylation, receptor internalization, insulin signaling, long-term depression, clathrin-mediated endocytosis, carboxyl terminus, low-frequency stimulation, synaptic plasticity, excitatory postsynaptic currents, hippocampus
MeSH terms
Aging, Amino Acid Sequence, Animals, Cells, Cultured, Endocytosis, Hippocampus, Humans, Insulin, Molecular Sequence Data, Mutation, Synaptic Transmission, Neurons, Phosphorylation, Time Factors, Sequence Alignment, Rats, Sprague-Dawley, Receptors, AMPA, Phosphotyrosine, Protein Subunits, Long-Term Synaptic Depression, Rats, In Vitro Techniques

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