AMPA receptor

(redirected from AMPA receptor trafficking)

AMPA re·cep·tor

a type of glutamate receptor that participates in excitatory neurotransmission and also binds α-amino-3-hydroxy-5-methyl-4-isoxazole propionic acid and acts as a cation channel.
Synonym(s): quisqualate receptor

AMPA receptor

A member of the ionotropic class of glutamate receptors (which includes NMDA and kainate receptors).

Functions
Mediate fast excitatory synaptic transmission in the CNS; play a key role in hippocampal synaptic long-term potentiation (LTP) and depression (LTD).

Structure
GluR1-4 subunits which assemble as homomers or heteromers to form functional AMPA receptors. The subunit composition determines the physiological properties of AMPA receptors: those with a GluR2 subunit have low permeability to Ca2+; those lacking a GluR2 subunit have high Ca2+ permeability.

AMPA receptor

Neurophysiology Any of a family of distinct ionotropic glutamate–excitatory post-synaptic receptors widely expressed in the CNS, which are the 1º memory receptors. See Excitatory amino acid receptor channel, Glutamate receptor.
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References in periodicals archive ?
Topics include AMPA receptor trafficking, long-term plasticity at inhibitory synapses, proteomics of the PSD, phosphorylation of site-specific antibodies, protein palmitoylation by the DHHC protein family, antibody labeling and biotinylation approaches to study neurotransmitter receptors, visualization of AMPAR trafficking and surface expression, neurotransmitter dynamics, receptors dynamics and functional tagging, RNAi and applications in neurobiology, transfecting and transducing neurons, expression of recombinant proteins in rat brains using Sindbus virus, Lentivirus-based genetic manipulation, AMPA receptor phosphorylation in synaptic plasticity, and genomic and post-genomic tools for studying synapse biology.
The Dynamic Synapse: Molecular Methods in Ionotropic Receptor Biology
But we have recently found that sensitization-related facilitation of the sensorimotor synapse involves postsynaptic mechanisms, particularly modulation of AMPA receptor trafficking.
This result is inconsistent with the idea that sensitization-induced facilitation of the sensorimotor synapse is mediated primarily by enhanced presynaptic release; further, it supports the involvement of AMPA receptor trafficking in sensitization.
Finally, to examine whether AMPA receptor trafficking is involved in actual learning in Aplysia, we used a semi-intact preparation.
Work by several investigators has shown that the induction of this form of LTP triggers modulation of postsynaptic AMPA receptor trafficking via activation of calcium/calmodulin-dependent protein kinase II (CaMKII) (Malinow and Malenka, 2002).
The cellular mechanisms of learning in Aplysia: of blind men and elephants

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