Super-resolution imaging reveals the nanoscale organization of metabotropic glutamate receptors at presynaptic active zones

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Super-resolution imaging reveals the nanoscale organization of metabotropic glutamate receptors at presynaptic active zones. / Siddig, Sana; Aufmkolk, Sarah; Doose, Sören; Jobin, Marie-Lise; Werner, Christian; Sauer, Markus; Calebiro, Davide.

In: Science Advances, Vol. 6, No. 16, eaay7193, 15.04.2020.

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Siddig, Sana ; Aufmkolk, Sarah ; Doose, Sören ; Jobin, Marie-Lise ; Werner, Christian ; Sauer, Markus ; Calebiro, Davide. / Super-resolution imaging reveals the nanoscale organization of metabotropic glutamate receptors at presynaptic active zones. In: Science Advances. 2020 ; Vol. 6, No. 16.

Bibtex

@article{12b987b3f7de4fde8bd0686fe1d56f1e,
title = "Super-resolution imaging reveals the nanoscale organization of metabotropic glutamate receptors at presynaptic active zones",
abstract = "G protein–coupled receptors (GPCRs) play a fundamental role in the modulation of synaptic transmission. A pivotal example is provided by the metabotropic glutamate receptor type 4 (mGluR4), which inhibits glutamate release at presynaptic active zones (AZs). However, how GPCRs are organized within AZs to regulate neurotransmission remains largely unknown. Here, we applied two-color super-resolution imaging by direct stochastic optical reconstruction microscopy (dSTORM) to investigate the nanoscale organization of mGluR4 at parallel fiber AZs in the mouse cerebellum. We find an inhomogeneous distribution, with multiple nanodomains inside AZs, each containing, on average, one to two mGluR4 subunits. Within these nanodomains, mGluR4s are often localized in close proximity to voltage-dependent CaV2.1 channels and Munc-18-1, which are both essential for neurotransmitter release. These findings provide previously unknown insights into the molecular organization of GPCRs at AZs, suggesting a likely implication of a close association between mGluR4 and the secretory machinery in modulating synaptic transmission.",
author = "Sana Siddig and Sarah Aufmkolk and S{\"o}ren Doose and Marie-Lise Jobin and Christian Werner and Markus Sauer and Davide Calebiro",
year = "2020",
month = apr,
day = "15",
doi = "10.1126/sciadv.aay7193 Article",
language = "English",
volume = "6",
journal = "Science Advances",
issn = "2375-2548",
publisher = "American Association for the Advancement of Science",
number = "16",

}

RIS

TY - JOUR

T1 - Super-resolution imaging reveals the nanoscale organization of metabotropic glutamate receptors at presynaptic active zones

AU - Siddig, Sana

AU - Aufmkolk, Sarah

AU - Doose, Sören

AU - Jobin, Marie-Lise

AU - Werner, Christian

AU - Sauer, Markus

AU - Calebiro, Davide

PY - 2020/4/15

Y1 - 2020/4/15

N2 - G protein–coupled receptors (GPCRs) play a fundamental role in the modulation of synaptic transmission. A pivotal example is provided by the metabotropic glutamate receptor type 4 (mGluR4), which inhibits glutamate release at presynaptic active zones (AZs). However, how GPCRs are organized within AZs to regulate neurotransmission remains largely unknown. Here, we applied two-color super-resolution imaging by direct stochastic optical reconstruction microscopy (dSTORM) to investigate the nanoscale organization of mGluR4 at parallel fiber AZs in the mouse cerebellum. We find an inhomogeneous distribution, with multiple nanodomains inside AZs, each containing, on average, one to two mGluR4 subunits. Within these nanodomains, mGluR4s are often localized in close proximity to voltage-dependent CaV2.1 channels and Munc-18-1, which are both essential for neurotransmitter release. These findings provide previously unknown insights into the molecular organization of GPCRs at AZs, suggesting a likely implication of a close association between mGluR4 and the secretory machinery in modulating synaptic transmission.

AB - G protein–coupled receptors (GPCRs) play a fundamental role in the modulation of synaptic transmission. A pivotal example is provided by the metabotropic glutamate receptor type 4 (mGluR4), which inhibits glutamate release at presynaptic active zones (AZs). However, how GPCRs are organized within AZs to regulate neurotransmission remains largely unknown. Here, we applied two-color super-resolution imaging by direct stochastic optical reconstruction microscopy (dSTORM) to investigate the nanoscale organization of mGluR4 at parallel fiber AZs in the mouse cerebellum. We find an inhomogeneous distribution, with multiple nanodomains inside AZs, each containing, on average, one to two mGluR4 subunits. Within these nanodomains, mGluR4s are often localized in close proximity to voltage-dependent CaV2.1 channels and Munc-18-1, which are both essential for neurotransmitter release. These findings provide previously unknown insights into the molecular organization of GPCRs at AZs, suggesting a likely implication of a close association between mGluR4 and the secretory machinery in modulating synaptic transmission.

U2 - 10.1126/sciadv.aay7193 Article

DO - 10.1126/sciadv.aay7193 Article

M3 - Article

VL - 6

JO - Science Advances

JF - Science Advances

SN - 2375-2548

IS - 16

M1 - eaay7193

ER -