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Related Concept Videos

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Ligand-gated ion channels are transmembrane proteins that play a vital role in intercellular communication and functions of the nervous system. They allow the influx of ions across the membrane once the neurotransmitter binds, allowing the subsequent transmission of electrical excitation across the neurons. Other ligand-gated ion channels, like the γ-aminobutyric acid (GABA) receptor, permit anions like chloride into the cells on the binding of the GABA molecule. Their entry into the cell...
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Electrical synapses found in all nervous systems play important and unique roles. In these synapses, the presynaptic and postsynaptic membranes are very close together (3.5 nm) and are actually physically connected by channel proteins forming gap junctions.
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Chemical synapses are specialized sites between two neurons or between a neuron and a non-neuronal cell like a muscle, glandular or sensory cell.
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Chemical synapses are specialized sites between two neurons or between a neuron and a non-neuronal cell like a muscle, glandular or sensory cell.
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Ligand-gated ion channels are transmembrane proteins with a channel for ions to pass through and a binding site for a ligand. The channel opens only when a ligand attaches to the binding site.
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GluD1 is localized at cholinergic synapses and is an acetylcholine receptor.

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Glutamate Delta 1 Receptor in Synapses, Circuits, and Disease.

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Related Experiment Video

Updated: Jan 9, 2026

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GluD1 at the synaptic crossroads: from domain structure to circuit dysfunction.

Poojashree B Chettiar1, Shashank M Dravid2

  • 1Department of Psychiatry and Behavioral Sciences, Naresh K. Vashisht College of Medicine, Texas A&M University, College Station, TX, USA.

Acta Pharmacologica Sinica
|December 4, 2025
PubMed
Summary

The glutamate delta-1 receptor (GluD1) is a key synaptic organizer, not an ion channel. It plays vital roles in brain development, plasticity, and behavior, offering new therapeutic targets for neurological disorders.

Keywords:
glutamate delta-1 receptor (GluD1)inotropic glutamate receptors (iGluRs)modular receptor domainssynaptic plasticity and organizationtrans-synaptic signaling

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Area of Science:

  • Neuroscience
  • Molecular Biology
  • Synaptic Function

Background:

  • The glutamate delta-1 receptor (GluD1) was historically enigmatic due to its lack of ion channel activity.
  • Recent research reclassifies GluD1 as a crucial synaptic organizer for neural circuit development and function.

Purpose of the Study:

  • To synthesize current knowledge on GluD1's structure, molecular mechanisms, and circuit-level roles.
  • To reconceptualize GluD1 as a non-ionotropic signaling scaffold.
  • To highlight its clinical relevance and therapeutic potential.

Main Methods:

  • Review of structural, molecular, and circuit-level studies.
  • Analysis of genetic models and structural biology data.
  • Exploration of clinical findings and therapeutic strategies.

Main Results:

  • GluD1 possesses a modular architecture contributing to synaptic organization.
  • It functions via non-ionotropic mechanisms, including transsynaptic adhesion and signaling modulation.
  • GRID1 mutations are linked to neurodevelopmental/psychiatric disorders; dysfunction is implicated in chronic pain.

Conclusions:

  • GluD1 is a pivotal signaling scaffold essential for synaptic organization and function.
  • Its non-ionotropic roles are critical for neural circuit regulation.
  • GluD1 represents a promising therapeutic target for brain disorders.