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Neuroreport. 1998 Jan 26;9(2):327-31.

A tetrameric subunit stoichiometry for a glutamate receptor-channel complex.

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Department of Neurobiology, Weizmann Institute of Science, Rehovot, Israel.


The structure of glutamate receptor-channel (GluR) subunits has recently been shown to differ from that of other ligand-gated channels and to contain a voltage-gated channel-like pore-forming motif. The view that the structure of GluR complexes is similar to the pentameric structure of other ligand-gated channels was questioned here. Studies of the response properties of the GluR1 subunit of the AMPA subtype of GluRs, co-expressed in Xenopus oocytes with its L646A mutant, which differs only by a greatly reduced sensitivity to quisqualate, provide new evidence suggesting that the GluR1 homomeric receptor channel has a tetrameric structure.

[Indexed for MEDLINE]

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