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mGluR5 is transiently confined in perisynaptic nanodomains to shape synaptic function

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  • Nicky Scheefhals

    (Utrecht University)

  • Manon Westra

    (Utrecht University)

  • Harold D. MacGillavry

    (Utrecht University)

Abstract

The unique perisynaptic distribution of postsynaptic metabotropic glutamate receptors (mGluRs) at excitatory synapses is predicted to directly shape synaptic function, but mechanistic insight into how this distribution is regulated and impacts synaptic signaling is lacking. We used live-cell and super-resolution imaging approaches, and developed molecular tools to resolve and acutely manipulate the dynamic nanoscale distribution of mGluR5. Here we show that mGluR5 is dynamically organized in perisynaptic nanodomains that localize close to, but not in the synapse. The C-terminal domain of mGluR5 critically controlled perisynaptic confinement and prevented synaptic entry. We developed an inducible interaction system to overcome synaptic exclusion of mGluR5 and investigate the impact on synaptic function. We found that mGluR5 recruitment to the synapse acutely increased synaptic calcium responses. Altogether, we propose that transient confinement of mGluR5 in perisynaptic nanodomains allows flexible modulation of synaptic function.

Suggested Citation

  • Nicky Scheefhals & Manon Westra & Harold D. MacGillavry, 2023. "mGluR5 is transiently confined in perisynaptic nanodomains to shape synaptic function," Nature Communications, Nature, vol. 14(1), pages 1-20, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-022-35680-w
    DOI: 10.1038/s41467-022-35680-w
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    References listed on IDEAS

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