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Related Concept Videos

Ligand-Gated Ion Channel Receptor: Gating Mechanism01:30

Ligand-Gated Ion Channel Receptor: Gating Mechanism

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

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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Related Experiment Video

Updated: Jun 13, 2026

Inhibitory Synapse Formation in a Co-culture Model Incorporating GABAergic Medium Spiny Neurons and HEK293 Cells Stably Expressing GABAA Receptors
07:51

Inhibitory Synapse Formation in a Co-culture Model Incorporating GABAergic Medium Spiny Neurons and HEK293 Cells Stably Expressing GABAA Receptors

Published on: November 14, 2014

Neurexins physically and functionally interact with GABA(A) receptors.

Chen Zhang1, Deniz Atasoy, Demet Araç

  • 1Department of Molecular and Cellular Physiology, Stanford University, 1050 Arastradero Road, Palo Alto, CA 94304-5543, USA.

Neuron
|May 18, 2010
PubMed
Summary

Presynaptic neurexins suppress GABAergic transmission in neurons by directly binding to GABA(A) receptors. This interaction regulates the brain's excitatory-inhibitory balance without affecting synapse numbers.

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Related Experiment Videos

Last Updated: Jun 13, 2026

Inhibitory Synapse Formation in a Co-culture Model Incorporating GABAergic Medium Spiny Neurons and HEK293 Cells Stably Expressing GABAA Receptors
07:51

Inhibitory Synapse Formation in a Co-culture Model Incorporating GABAergic Medium Spiny Neurons and HEK293 Cells Stably Expressing GABAA Receptors

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Osmotic Avoidance in Caenorhabditis elegans: Synaptic Function of Two Genes, Orthologues of Human NRXN1 and NLGN1, as Candidates for Autism

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Methods for the Discovery of Novel Compounds Modulating a Gamma-Aminobutyric Acid Receptor Type A Neurotransmission
07:16

Methods for the Discovery of Novel Compounds Modulating a Gamma-Aminobutyric Acid Receptor Type A Neurotransmission

Published on: August 16, 2018

Area of Science:

  • Neuroscience
  • Molecular Biology
  • Synaptic Plasticity

Background:

  • Neurexins are presynaptic cell-adhesion molecules crucial for synapse formation.
  • Previous studies suggested neurexins are synaptogenic, inducing postsynaptic specializations.

Purpose of the Study:

  • To investigate the role of neurexin overexpression in neuronal synaptic transmission.
  • To elucidate the mechanism by which neurexins influence GABAergic signaling.

Main Methods:

  • Overexpression of neurexins in cultured neurons.
  • Electrophysiological recordings to assess synaptic transmission.
  • Biochemical assays to determine protein interactions.

Main Results:

  • Neurexin overexpression selectively suppressed GABAergic synaptic transmission without altering synapse density.
  • This effect was cell-autonomous and neuroligin-independent.
  • Neurexins were found to directly bind to GABA(A) receptors, inhibiting their function.

Conclusions:

  • Presynaptic neurexins directly modulate postsynaptic GABA(A) receptors.
  • This interaction provides a novel mechanism for regulating GABAergic transmission.
  • Neurexin-GABA(A) receptor interaction may play a role in maintaining the excitatory-inhibitory balance in the brain.