Cited by 132Neuroscience and Neuropharmacology ResearchUbiquitin and proteasome pathwaysCellular transport and secretion

Activity-Dependent Ubiquitination of GluA1 and GluA2 Regulates AMPA Receptor Intracellular Sorting and Degradation

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Widagdo, Jocelyn, Chai, Ye Jin, Ridder, Margreet C., Chau, Yu Qian, Johnson, Richard C., Sah, Pankaj, Huganir, Richard L., Anggono, Victor·2015·Cell Reports

Abstract

AMPA receptors (AMPARs) have recently been shown to undergo post-translational ubiquitination in mammalian neurons. However, the underlying molecular mechanisms are poorly understood and remain controversial. Here, we report that all four AMPAR subunits (GluA1-4) are rapidly ubiquitinated upon brief application of AMPA or bicuculline in cultured neurons. This process is Ca 2+ dependent and requires the activity of L-type voltage-gated Ca 2+ channels and Ca 2+ /calmodulin-dependent kinase II. The ubiquitination of all subunits occurs exclusively on AMPARs located on the plasma membrane post-endocytosis. The sites of ubiquitination were mapped to Lys-868 in GluA1 and Lys-870/Lys-882 in GluA2 C-terminals. Mutation of these lysines did not affect basal surface expression or AMPA-induced internalization of GluA1 and GluA2 subunits. Instead, it reduced the intracellular trafficking of AMPARs to the late endosomes and thus protein degradation. These data indicate that ubiquitination is an important regulatory signal for controlling AMPAR function, which may be crucial for synaptic plasticity.

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Crossref · 10.1016/j.celrep.2015.01.015

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  • Bicuculline treatment stimulates GluA2 ubiquitination on K882, and AMPAR ubiquitination has been shown to be required for homeostatic scaling-down.

    “Bicuculline treatment stimulates GluA2 ubiquitination on K882 (Widagdo et al., 2015), very close to the Y876 and S880 phosphorylation sites, and AMPAR ubiquitination has been shown to be required for homeostatic scaling-down (Scudder et al., 2014).”

    From The AMPA Receptor Code of Synaptic Plasticity (2018) · cites this paper as Widagdo et al., 2015

    The Results section reports that bicuculline induces ubiquitination of GluA2, and a separate Results section identifies K882 as a major GluA2 ubiquitination site. However, the K882 mapping used AMPA treatment, not bicuculline, so the paper does not establish that bicuculline stimulates ubiquitination specifically at K882. The scaling-down statement is cited to Scudder et al., not to Widagdo et al. (LLM, conf=0.88)

    Experimental — accuracy not yet measured
  • All four AMPAR subunits are ubiquitinated, with major sites on GluA1 and GluA2 mapped to GluA1 K868 and GluA2 K870/K882.

    “All four AMPAR subunit are also ubiquitinated. The major sites of ubiquitination on GluA1 and GluA2 have been mapped to GluA1 K868 and GluA2 K870/K882 (Widagdo et al., 2015, Widagdo et al., 2017, Lussier et al., 2015).”

    From The AMPA Receptor Code of Synaptic Plasticity (2018) · cites this paper as Widagdo et al., 2015

  • GluA2 is ubiquitinated on K870 and K882 in response to neuronal activity, and this is dependent on AMPAR internalization.

    “GluA2 is also a target of ubiquitination on K870 and K882, which occurs in response to neuronal activity and is dependent on AMPAR internalization (Widagdo et al., 2015).”

    From The AMPA Receptor Code of Synaptic Plasticity (2018) · cites this paper as Widagdo et al., 2015

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Research works printed but not linked: 27

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Authors
Widagdo, J., Chai, Y. J., Ridder, M. C., Chau, Y. Q., Johnson, R. C., Sah, P., Huganir, R. L., & Anggono, V.
Affiliations
  • The University of Queensland (AU)
  • Johns Hopkins University (US)
Corresponding author
  • Huganir, Richard L.
  • Anggono, Victor
Venue
Cell Reports
Publisher
Elsevier BV
Published
2015-02
Volume
10
Issue
5
Pages
783-795
ISSN
2211-1247 (ISSN-L)
OpenAlex
W2019147863
Cited by
132
References
4
Citations by year
2026: 4 · 2025: 5 · 2024: 22 · 2023: 8 · 2022: 10 · 2021: 15 · 2020: 13 · 2019: 7 · 2018: 12 · 2017: 16 · 2016: 10 · 2015: 10
FWCI
7.46
Type
journal article
Language
en
Open access
Locations
  • Cell Reports (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion, cc-by-nc-nd)
  • PubMed Central (acceptedVersion, cc-by-nc-nd)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • Johns Hopkins University
  • John T. Reid Charitable Trusts
  • National Health and Medical Research Council
  • National Medical Research Council
  • National Institute of Neurological Disorders and Stroke (R01NS036715)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Ubiquitin and proteasome pathways
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Cellular transport and secretion
Keywords
AMPA receptors, GluR1, GluA2, ubiquitination, activity-dependent regulation, L-type calcium channels, CaMKII, receptor internalization, endocytosis, late endosomes, protein degradation, synaptic plasticity, post-translational modification

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