Regulation of α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid receptor trafficking through PKA phosphorylation of the Glu receptor 1 subunit

Heng Ye Man, Yoko Sekine-Aizawa, Richard L. Huganir

Research output: Contribution to journalArticlepeer-review

Abstract

α-Amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (AMPA) receptors mediate the majority of excitatory synaptic transmission in the brain. Recent studies have shown that activation of PKA regulates the membrane trafficking of the AMPA receptor Glu receptor 1 (GluR1) subunit, but the role of direct phosphorylation of GluR1 in regulating receptor redistribution is not clear. Here we show that phosphorylation of the GluR1 subunit on serine 845 by PKA is required for PKA-induced increases in AMPA receptor cell-surface expression because it promotes receptor insertion and decreases receptor endocytosis. Furthermore, dephosphorylation of GluR1 serine 845 triggers NMDA-induced AMPA receptor internalization. These findings strongly suggest that dynamic changes in direct phosphorylation of GluR1 by PKA are crucial in the modulation of AMPA receptor trafficking and synaptic plasticity.

Original languageEnglish (US)
Pages (from-to)3579-3584
Number of pages6
JournalProceedings of the National Academy of Sciences of the United States of America
Volume104
Issue number9
DOIs
StatePublished - Feb 27 2007

Keywords

  • Glutamate receptors
  • Long-term potentiation
  • Synaptic plasticity

ASJC Scopus subject areas

  • General

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