Selective RNA editing and subunit assembly of native glutamate receptors
1994 | journal article; research paper. A publication with affiliation to the University of Göttingen.
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- Authors
- Puchalski, Ralph B.; Louis, Jean-Claude; Brose, Nils ; Traynelis, Stephen F.; Egebjerj, Jan; Kukekov, Valery; Wenthold, Robert J.; Rogers, Scott W.; Lin, Fan; Moran, Thomas; Morrison, John H.; Heinemann, Stephen F.
- Abstract
- RNA editing and subunit assembly of ionotropic glutamate receptors (GluRs) were examined in an oligodendrocyte progenitor cell line, CG4, which expresses GluR2-GluR4, GluR6, GluR7, KA1, and KA2. AMPA-evoked currents rapidly desensitize, whereas kainate-evoked currents contain a steady-state component with a nearly linear current-voltage relation and a fast desensitizing component that is inwardly rectifying. The Q/R site is edited >95% to the arginine codon in GluR2(Q607) mRNA, and <5% in GluR6(Q621) mRNA. Immunoprecipitation experiments demonstrate that GluR6 and/or GluR7 subunits assemble with KA2, but not with GluR2-GluR4. These results indicate that oligodendrocyte progenitor cells selectively edit and assemble glutamate receptors into at least two functionally and structurally distinct heteromeric channels.
- Issue Date
- 1994
- Publisher
- Cell Press
- Journal
- Neuron
- ISSN
- 0896-6273