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The AMPA receptor interacts with and signals through the protein tyrosine kinase Lyn

Author

Listed:
  • Takashi Hayashi

    (Institute of Medical Science, The University of Tokyo)

  • Hisashi Umemori

    (Institute of Medical Science, The University of Tokyo)

  • Masayoshi Mishina

    (School of Medicine, The University of Tokyo
    CREST, Japan Science and Technology Corporation)

  • Tadashi Yamamoto

    (Institute of Medical Science, The University of Tokyo)

Abstract

Glutamate is the major excitatory neurotransmitter in the mammalian central nervous system. The ionotropic glutamate receptors are classified into two groups, NMDA (N-methyl-D-aspartate) receptors and AMPA (α-amino-3-hydroxy-5-methyl-4-isoxazole propionate) receptors. The AMPA receptor is a ligand-gated cation channel that mediates the fast component of excitatory postsynaptic currents in the central nervous system1,2. Here we report that AMPA receptors function not only as ion channels but also as cell-surface signal transducers by means of their interaction with the Src-family non-receptor protein tyrosine kinase Lyn. In the cerebellum, Lyn is physically associated with the AMPA receptor and is rapidly activated following stimulation of the receptor. Activation of Lyn is independent of Ca2+ and Na+ influx through AMPA receptors. As a result of activation of Lyn, the mitogen-activated protein kinase (MAPK) signalling pathway is activated, and the expression of brain-derived neurotrophic factor (BDNF) messenger RNA is increased in a Lyn-kinase-dependent manner. Thus, AMPA receptors generate intracellular signals from the cell surface to the nucleus through the Lyn–MAPK pathway, which may contribute to synaptic plasticity by regulating the expression of BDNF.

Suggested Citation

  • Takashi Hayashi & Hisashi Umemori & Masayoshi Mishina & Tadashi Yamamoto, 1999. "The AMPA receptor interacts with and signals through the protein tyrosine kinase Lyn," Nature, Nature, vol. 397(6714), pages 72-76, January.
    • Handle: RePEc:nat:nature:v:397:y:1999:i:6714:d:10.1038_16269
    DOI: 10.1038/16269
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