Cited by 151Neuroscience and Neuropharmacology ResearchAmino Acid Enzymes and MetabolismReceptor Mechanisms and Signaling

Regulation of NMDA glutamate receptor functions by the GluN2 subunits

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Vieira, Marta, Yong, Xuan Ling Hilary, Roche, Katherine W., Anggono, Victor·2020·Journal of Neurochemistry

Abstract

The N‐methyl‐D‐aspartate receptors (NMDARs) are ionotropic glutamate receptors that mediate the flux of calcium (Ca 2+) into the post‐synaptic compartment. Ca 2+ influx subsequently triggers the activation of various intracellular signalling cascades that underpin multiple forms of synaptic plasticity. Functional NMDARs are assembled as heterotetramers composed of two obligatory GluN1 subunits and two GluN2 or GluN3 subunits. Four different GluN2 subunits (GluN2A‐D) are present throughout the central nervous system; however, they are differentially expressed, both developmentally and spatially, in a cell‐ and synapse‐specific manner. Each GluN2 subunit confers NMDARs with distinct ion channel properties and intracellular trafficking pathways. Regulated membrane trafficking of NMDARs is a dynamic process that ultimately determines the number of NMDARs at synapses, and is controlled by subunit‐specific interactions with various intracellular regulatory proteins. Here we review recent progress made towards understanding the molecular mechanisms that regulate the trafficking of GluN2‐containing NMDARs, focusing on the roles of several key synaptic proteins that interact with NMDARs via their carboxyl termini. image

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Crossref · 10.1111/jnc.14970

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  • Specific GluN2 subunits confer distinct ion channel properties and intracellular trafficking pathways, and their expression patterns vary developmentally and spatially across the central nervous system.

    “The specific GluN2 subunits confer distinct ion channel properties and intracellular trafficking pathways, and their expression patterns vary developmentally and spatially across the central nervous system [48] (Figure 3).”

    From Molecular Physiology of the Neuronal Synapse (2026) · cites this paper as [48]

  • NMDARs are crucial for synaptic plasticity and memory formation, functioning as coincidence detectors that require both presynaptic glutamate release and postsynaptic depolarization to open their ion channel and allow calcium influx.

    “NMDARs are crucial for synaptic plasticity and memory formation, functioning as “coincidence detectors” that require both presynaptic glutamate release and postsynaptic depolarization to open their ion channel and allow for calcium influx [48].”

    From Molecular Physiology of the Neuronal Synapse (2026) · cites this paper as [48]

  • NMDARs are not a homogeneous group.

    “The distinct biophysical properties and spatiotemporal expression patterns of different GluN2 subunits emphasize that NMDARs are not a homogeneous group [48].”

    From Molecular Physiology of the Neuronal Synapse (2026) · cites this paper as [48]

  • NMDAR trafficking is a complex process involving biosynthesis, dendritic transport, exocytosis, lateral diffusion, endocytosis, recycling, and degradation, all tightly controlled by protein-protein interactions involving the cytoplasmic carboxyl termini of NMDAR subunits.

    “NMDAR trafficking is a complex process involving biosynthesis, dendritic transport, exocytosis, lateral diffusion, endocytosis, recycling, and degradation, all tightly controlled by protein–protein interactions involving the cytoplasmic carboxyl termini (CTDs) of NMDAR subunits [48].”

    From Molecular Physiology of the Neuronal Synapse (2026) · cites this paper as [48]

  • GluN2B-containing NMDARs are generally more mobile than GluN2A-containing receptors, which tend to be more stably localized at synapses.

    “GluN2B-containing NMDARs are generally more mobile than GluN2A-containing receptors, which tend to be more stably localized at synapses.”

    From Molecular Physiology of the Neuronal Synapse (2026) · cites this paper as [48]

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Research works printed but not linked: 6

  1. Chen BS, Gray JA, Sanz-Clemente A, Wei Z, Thomas EV, Nicoll RA and Roche KW (2012b) SAP102 Mediates Synaptic Clearance of NMDA Receptors. Cell Rep. PMC3513525 23103165
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  3. Foster KA, McLaughlin N, Edbauer D, Phillips M, Bolton A, Constantine-Paton M and Sheng M (2010) Distinct roles of NR2A and NR2B cytoplasmic tails in long-term potentiation. J Neurosci, 30, 2676– 2685. 20164351 PMC2840640
  4. Leinekugel X, Medina I, Khalilov I, Ben-Ari Y and Khazipov R (1997) Ca2+ oscillations mediated by the synergistic excitatory actions of GABA(A) and NMDA receptors in the neonatal hippocampus. Neuron, 18, 243– 255. 9052795
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Authors
Vieira, M., Yong, X. L. H., Roche, K. W., & Anggono, V.
Affiliations
  • National Institutes of Health (US)
  • The University of Queensland (AU)
Corresponding author
  • Roche, Katherine W.
  • Anggono, Victor
Venue
Journal of Neurochemistry
Publisher
Wiley
Published
2020-02-16
Volume
154
Issue
2
Pages
121-143
ISSN
  • 0022-3042 (ISSN-L)
  • 1471-4159
OpenAlex
W3001459179
Cited by
151
References
298
Citations by year
2026: 17 · 2025: 31 · 2024: 19 · 2023: 30 · 2022: 22 · 2021: 23 · 2020: 9
FWCI
2.91
Type
journal article
Language
en
Open access
Locations
  • Journal of Neurochemistry (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
Australian Research Council (DP190101390)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biochemistry › Amino Acid Enzymes and Metabolism
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Receptor Mechanisms and Signaling
Keywords
NMDA receptor, GluN2 subunits, GluN1 subunit, receptor trafficking, synaptic plasticity, ion channel properties, synaptic proteins, receptor internalization
MeSH terms
Animals, Humans, Receptors, N-Methyl-D-Aspartate, Protein Subunits, Protein Transport, Dendritic Spines

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