Calcium-permeable AMPA receptor plasticity is mediated by subunit-specific interactions with PICK1 and NSF

Stephanie M. Gardner, Kogo Takamiya, Jun Xia, Jun Gyo Suh, Richard Johnson, Sandy Yu, Richard L. Huganir

Research output: Contribution to journalArticlepeer-review

Abstract

A recently described form of synaptic plasticity results in dynamic changes in the calcium permeability of synaptic AMPA receptors. Since the AMPA receptor GluR2 subunit confers calcium permeability, this plasticity is thought to occur through the dynamic exchange of synaptic GluR2-lacking and GluR2-containing receptors. To investigate the molecular mechanisms underlying this calcium-permeable AMPA receptor plasticity (CARP), we examined whether AMPA receptor exchange was mediated by subunit-specific protein-protein interactions. We found that two GluR2-interacting proteins, the PDZ domain-containing Protein interacting with C kinase (PICK1) and N-ethylmaleimide sensitive fusion protein (NSF), are specifically required for CARP. Furthermore, PICK1, but not NSF, regulates the formation of extrasynaptic plasma membrane pools of GluR2-containing receptors that may be laterally mobilized into synapses during CARP. These results demonstrate that PICK1 and NSF dynamically regulate the synaptic delivery of GluR2-containing receptors during CARP and thus regulate the calcium permeability of AMPA receptors at excitatory synapses.

Original languageEnglish (US)
Pages (from-to)903-915
Number of pages13
JournalNeuron
Volume45
Issue number6
DOIs
StatePublished - Mar 24 2005

ASJC Scopus subject areas

  • Neuroscience(all)

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