Cited by 516Neuroscience and Neuropharmacology ResearchAmino Acid Enzymes and MetabolismReceptor Mechanisms and Signaling

Subunit-Specific NMDA Receptor Trafficking to Synapses

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Barria, Andres, Malinow, Roberto·2002·Neuron

Abstract

To elucidate mechanisms controlling the number and subunit composition of synaptic NMDA-Rs in hippocampal slice neurons, the NR1, NR2A, and NR2B subunits were optically and electrophysiologically tagged. The NR2 subunit directs delivery of receptors to synapses with different rules controlling NR2A and NR2B. Synaptic incorporation of NR2B-containing receptors is not limited by synaptic transmission nor enhanced by increased subunit expression. NR2A-containing receptors whose expression normally increases with age replace synaptic NR2B-containing receptors. Replacement is enhanced by increased NR2A expression and requires synaptic activity. Surprisingly, spontaneously released transmitter acting on synaptic NMDA-Rs is sufficient for replacement and reduces NMDA-R responses. Thus, as with AMPA-Rs, synaptic trafficking of NMDA-Rs is tightly regulated and has subunit-specific rules with functionally important consequences.

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Crossref · 10.1016/s0896-6273(02)00776-6

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151 of 151 references verified0 citation errors · 0 not checkable

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  • Mutations in the GluN2B CTD that cannot bind CaMKII, or competing constructs, produce highly variable effects on LTP, ranging from complete block to no block.

    “The second approach utilizes mutations in the CTD of GluN2B that cannot bind CaMKII as replacement for the wt (CaMKII L1298A/R1300Q) (120, 121, 230) or either competing with overexpressed full-length constructs (GluN2B R1300S/Q1303D) (231) or competing by expressing just the wt GluN2B CTD (839–1482) (232). The results are highly variable as reviewed in Ref. 233, ranging from complete block of LTP”

    From Synaptic memory and CaMKII (2023) · cites this paper as [231]

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Authors
Barria, A., & Malinow, R.
Affiliations
Cold Spring Harbor Laboratory (US)
Corresponding author
Malinow, Roberto
Venue
Neuron
Publisher
Elsevier BV
Published
2002-07
Volume
35
Issue
2
Pages
345-353
ISSN
0896-6273 (ISSN-L)
OpenAlex
W2030377743
Cited by
515
References
151
Citations by year
2026: 5 · 2025: 14 · 2024: 16 · 2023: 12 · 2022: 14 · 2021: 14 · 2020: 17 · 2019: 22 · 2018: 12 · 2017: 15 · 2016: 26 · 2015: 27 · 2014: 28 · 2013: 23 · 2012: 23
FWCI
10.46
Type
journal article
Language
en
Open access
Locations
  • Neuron (publishedVersion)
  • PubMed (publishedVersion)
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, receptor trafficking, NR2A, NR2B, NR1, subunit composition, hippocampal neurons, spontaneous neurotransmission, receptor subunit expression, synaptic plasticity
MeSH terms
Animals, Animals, Newborn, Cell Compartmentation, Cells, Cultured, Dendrites, Dose-Response Relationship, Drug, Hippocampus, Indicators and Reagents, Luminescent Proteins, Membrane Potentials, Mutation, Synaptic Transmission, Organ Culture Techniques, Recombinant Fusion Proteins, Synapses, Receptors, N-Methyl-D-Aspartate, Pyramidal Cells, Excitatory Amino Acid Antagonists, Protein Transport, Sodium Channel Blockers, Green Fluorescent Proteins

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