EAAT3 - Excitatory Amino-acid Transporter 3 - EAAC1 - SLC1A1

Glutamate Transporters

The family of glutamate transporters contains two subclasses:
EAAT: Exitatory amino acid transporters, dependent on  an electrochemical gradient of sodium ions, with five members: EAAT1 - EAAT5
VGLUT: Vesicular glutamat transporters, not dependent on an electrochemical gradient, with four members: VGLUT1 - VGLUT3, Sialin

EAAT: The proteins contain eight transmembrane domains and can form homo- and heteromers, where each monomer is a functional unit capable of substrate permeation.
VGLUT: A putative model propose twelve transmembrane segments for VGLUT1 and VGLUT2 and ten for VGLUT3

In the brain, EAATs remove glutamate from the synaptic cleft and extrasynaptic sites via glutamate reuptake into glial cells and neurons, while VGLUTs move glutamate from the cell cytoplasm into synaptic vesicles. Glutamate transporters also transport aspartate and are present in virtually all peripheral tissues, including the heart, liver, testes, and bone.

EAAT3: Background Information

The excitatory amino acid transporter (EAAT3; also known as EAAC1) is a sodium-dependent neuronal uptake transporter encoded by the slc1a1 gene.


Human Protein:
UniProt P43005

mature neurons, where it is distributed in somata and dendrites.

Function/ Application:
EAAT3 functions as a co-transporter, coupling the uphill substrate transport into the cells to the electrochemical gradients of sodium and potassium.

Dysfunction of glutamate transporters leads to increased extracellular glutamate levels, thereby causing neurotoxicity and neurodegeneration.


Glutamate, aspartate, cysteine

SURFE2R transporter assays

Data and Applications

EAAT3 - Screening of 6 inhibitors

EAAT3 Surfe2r96SE data

Icon 96SE   SURFE2R 96SE data and applications:

Screening of 6 inhibitors for EAAT3. After negative control and full activation of the transporter, different concentrations of inhibitor were used. At the end the full activation was repeated.



EAAT3 - Current Traces at different Sodium Chloride Concentrations

EAAC1 SURFE2R N1 Website

Icon N1   SURFE2R N1 data and applications:

EAAT3 current traces were recorded after application of different Sodium Chloride concentrations. The EC50 of the peak current was determined as 42.2 mM. 


Application Notes

Neurons - "Electrophysiological recordings of LGIC and AA transporters in iCell® GlutaNeurons"

icon pl   Patchliner,  icon sp96   SyncroPatch 384PE (a predecessor model of the SyncroPatch 384) and   Icon N1   SURFE2R N1 application note:   logo pdf   (0.5 MB)
Cells were kindly provided by FUJIFILM Cellular Dynamics, Inc.  

EAAT3 - "High throughput SSM recordings of EAAT3 (SLC1A1) activity on the SURFE2R 96SE"

Icon 96SE   SURFE2R 96SE application note   logo pdf   (1.5 MB)

EAAT3 - "Electrophysiological recordings of EAAT3 (SLC1A1) activity on Nanion’s SURFE²R N1"

Icon N1   SURFE²R application note  logo pdf   (0.4 MB)


2020 - A novel approach to detect electrogenic transporter activity in intact cells applied to investigate iPSC derived cardiomyocytes and neurons

 Icon N1   SURFE²R N1 and   Icon 96SE   SURFE²R 96SE poster, 64th Annual Meeting of the Biophysical Society   logo pdf   (1.6 MB)

2018 - EAAT3 Investigated using SSM-based Electrophysiology

Icon 96SE   SURFE²R 96SE poster, Biophysics Annual Meeting 2018  logo pdf   (1.2 MB)


2021 - Functional Characterization of SLC Transporters Using Solid Supported Membranes

Icon N1 SURFE2R N1 Chapter in Biophysics of Membrane Proteins (2021)

Bazzone A., Barthmes M.

2009 - An automatic electrophysiological assay for the neuronal glutamate transporter mEAAC1

Icon N1   SURFE²R-technology (custom-built system) publication in Journal of Neuroscience Methods (2009)

Krause R., Watzke N., Kelety B., Dörner W., Fendler K.

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