{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,25]],"date-time":"2026-03-25T02:51:48Z","timestamp":1774407108494,"version":"3.50.1"},"reference-count":46,"publisher":"Proceedings of the National Academy of Sciences","issue":"29","content-domain":{"domain":["www.pnas.org"],"crossmark-restriction":true},"short-container-title":["Proc. Natl. Acad. Sci. U.S.A."],"published-print":{"date-parts":[[2007,7,17]]},"abstract":"<jats:p>\n            Presynaptic ionotropic glutamate receptors are emerging as key players in the regulation of synaptic transmission. Here we identify GluR7, a kainate receptor (KAR) subunit with no known function in the brain, as an essential subunit of presynaptic autoreceptors that facilitate hippocampal mossy fiber synaptic transmission. GluR7\n            <jats:sup>\u2212\/\u2212<\/jats:sup>\n            mice display markedly reduced short- and long-term synaptic potentiation. Our data suggest that presynaptic KARs are GluR6\/GluR7 heteromers that coassemble and are localized within synapses. We show that recombinant GluR6\/GluR7 KARs exhibit low sensitivity to glutamate, and we provide evidence that presynaptic KARs at mossy fiber synapses are likely activated by high concentrations of glutamate. Overall, from our data, we propose a model whereby presynaptic KARs are localized in the presynaptic active zone close to release sites, display low affinity for glutamate, are likely Ca\n            <jats:sup>2+<\/jats:sup>\n            -permeable, are activated by single release events, and operate within a short time window to facilitate the subsequent release of glutamate.\n          <\/jats:p>","DOI":"10.1073\/pnas.0608891104","type":"journal-article","created":{"date-parts":[[2007,7,10]],"date-time":"2007-07-10T01:04:27Z","timestamp":1184029467000},"page":"12181-12186","update-policy":"https:\/\/doi.org\/10.1073\/pnas.cm10313","source":"Crossref","is-referenced-by-count":130,"title":["GluR7 is an essential subunit of presynaptic kainate autoreceptors at hippocampal mossy fiber synapses"],"prefix":"10.1073","volume":"104","author":[{"given":"Paulo S.","family":"Pinheiro","sequence":"first","affiliation":[{"name":"*Laboratoire \u201cPhysiologie Cellulaire de la Synapse,\u201d Centre National de la Recherche Scientifique, Bordeaux Neuroscience Institute, University of Bordeaux, 33077 Bordeaux Cedex, France;"},{"name":"Center for Neuroscience and Cell Biology of Coimbra, Institute of Biochemistry, Faculty of Medicine, University of Coimbra, 3004-504 Coimbra, Portugal;"}]},{"given":"David","family":"Perrais","sequence":"additional","affiliation":[{"name":"*Laboratoire \u201cPhysiologie Cellulaire de la Synapse,\u201d Centre National de la Recherche Scientifique, Bordeaux Neuroscience Institute, University of Bordeaux, 33077 Bordeaux Cedex, France;"}]},{"given":"Fran\u00e7oise","family":"Coussen","sequence":"additional","affiliation":[{"name":"*Laboratoire \u201cPhysiologie Cellulaire de la Synapse,\u201d Centre National de la Recherche Scientifique, Bordeaux Neuroscience Institute, University of Bordeaux, 33077 Bordeaux Cedex, France;"}]},{"given":"Jacques","family":"Barhanin","sequence":"additional","affiliation":[{"name":"Molecular Neurobiology Laboratory, The Salk Institute for Biological Studies, La Jolla, CA 92037; and"}]},{"given":"Bernhard","family":"Bettler","sequence":"additional","affiliation":[{"name":"Molecular Neurobiology Laboratory, The Salk Institute for Biological Studies, La Jolla, CA 92037; and"}]},{"given":"Jeffrey R.","family":"Mann","sequence":"additional","affiliation":[{"name":"Division of Biology, Beckman Research Institute, City of Hope, Duarte, CA 91010"}]},{"given":"Jo\u00e3o O.","family":"Malva","sequence":"additional","affiliation":[{"name":"Center for Neuroscience and Cell Biology of Coimbra, Institute of Biochemistry, Faculty of Medicine, University of Coimbra, 3004-504 Coimbra, Portugal;"}]},{"given":"Stephen F.","family":"Heinemann","sequence":"additional","affiliation":[{"name":"Molecular Neurobiology Laboratory, The Salk Institute for Biological Studies, La Jolla, CA 92037; and"}]},{"given":"Christophe","family":"Mulle","sequence":"additional","affiliation":[{"name":"*Laboratoire \u201cPhysiologie 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