Cited by 158Neuroscience and Neuropharmacology ResearchNicotinic Acetylcholine Receptors StudyReceptor Mechanisms and Signaling

NMDA receptors regulate GABA A receptor lateral mobility and clustering at inhibitory synapses through serine 327 on the γ2 subunit

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Muir, James, Arancibia-Carcamo, I. Lorena, MacAskill, Andrew F., Smith, Katharine R., Griffin, Lewis D., Kittler, Josef T.·2010·Proceedings of the National Academy of Sciences

Abstract

Modification of the number of GABA A receptors (GABA A Rs) clustered at inhibitory synapses can regulate inhibitory synapse strength with important implications for information processing and nervous system plasticity and pathology. Currently, however, the mechanisms that regulate the number of GABA A Rs at synapses remain poorly understood. By imaging superecliptic pHluorin tagged GABA A R subunits we show that synaptic GABA A R clusters are normally stable, but that increased neuronal activity upon glutamate receptor (GluR) activation results in their rapid and reversible dispersal. This dispersal correlates with increases in the mobility of single GABA A Rs within the clusters as determined using single-particle tracking of GABA A Rs labeled with quantum dots. GluR-dependent dispersal of GABA A R clusters requires Ca 2+ influx via NMDA receptors (NMDARs) and activation of the phosphatase calcineurin. Moreover, the dispersal of GABA A R clusters and increased mobility of individual GABA A Rs are dependent on serine 327 within the intracellular loop of the GABA A R γ2 subunit. Thus, NMDAR signaling, via calcineurin and a key GABA A R phosphorylation site, controls the stability of synaptic GABA A Rs, with important implications for activity-dependent control of synaptic inhibition and neuronal plasticity.

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  • The surface mobility of neurotransmitter receptors is dynamically regulated to control synaptic activity and is a key component underlying plasticity at nerve terminals.

    “The surface mobility of neurotransmitter receptors is dynamically regulated to control synaptic activity and is emerging as another key component underlying plasticity at nerve terminals.40,53,54”

    From The autism and schizophrenia associated gene CYFIP1 is critical for the maintenance of dendritic complexity and the stabilization of mature spines (2014) · cites this paper as [40]

    The Introduction says receptor movement into and out of synapses is an emerging mechanism for regulating synaptic strength, and the Discussion reports activity-dependent changes in GABA_A receptor mobility. The paper links this mechanism to inhibitory synaptic plasticity, but studies receptors at inhibitory synapses, not plasticity at nerve terminals specifically. No page numbers are available in our copy. (LLM, conf=0.82)

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Authors
Muir, J., Arancibia-Carcamo, I. L., MacAskill, A. F., Smith, K. R., Griffin, L. D., & Kittler, J. T.
Affiliations
  • University College London (GB)
  • Department of Neuroscience, Physiology, and Pharmacology,
Venue
Proceedings of the National Academy of Sciences
Published
2010-09-07
Volume
107
Issue
38
Pages
16679-16684
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2090585744
Cited by
158
References
36
Citations by year
2026: 7 · 2025: 14 · 2024: 8 · 2023: 5 · 2022: 13 · 2021: 7 · 2020: 7 · 2019: 12 · 2018: 9 · 2017: 7 · 2016: 8 · 2015: 8 · 2014: 26 · 2013: 5 · 2012: 14
FWCI
3.49
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Nicotinic Acetylcholine Receptors Study
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Receptor Mechanisms and Signaling
Keywords
NMDA receptor, GABAA receptor, gamma2 subunit, receptor clustering, receptor lateral mobility, inhibitory synapses, synaptic inhibition, calcineurin, calcium influx, glutamate receptor activation, activity-dependent synaptic plasticity, receptor phosphorylation, single-particle tracking
MeSH terms
Animals, Cells, Cultured, Neuronal Plasticity, Neurons, Receptors, GABA-A, Recombinant Fusion Proteins, Serine, Synapses, Transfection, Signal Transduction, Receptors, N-Methyl-D-Aspartate, Mutagenesis, Site-Directed, Glutamic Acid, Calcineurin, Amino Acid Substitution, Calcium Signaling, Multiprotein Complexes, Rats

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