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AMPA-receptor specific biogenesis complexes control synaptic transmission and intellectual ability

AMPA-type glutamate receptors (AMPARs), key elements in excitatory neurotransmission in the brain, are macromolecular complexes whose properties and cellular functions are determined by the co-assembled constituents of their proteome. Here we identify AMPAR complexes that transiently form in the end...

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Detalles Bibliográficos
Autores principales: Brechet, Aline, Buchert, Rebecca, Schwenk, Jochen, Boudkkazi, Sami, Zolles, Gerd, Siquier-Pernet, Karine, Schaber, Irene, Bildl, Wolfgang, Saadi, Abdelkrim, Bole-Feysot, Christine, Nitschke, Patrick, Reis, Andre, Sticht, Heinrich, Al-Sanna’a, Nouriya, Rolfs, Arndt, Kulik, Akos, Schulte, Uwe, Colleaux, Laurence, Abou Jamra, Rami, Fakler, Bernd
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5500892/
https://www.ncbi.nlm.nih.gov/pubmed/28675162
http://dx.doi.org/10.1038/ncomms15910
Descripción
Sumario:AMPA-type glutamate receptors (AMPARs), key elements in excitatory neurotransmission in the brain, are macromolecular complexes whose properties and cellular functions are determined by the co-assembled constituents of their proteome. Here we identify AMPAR complexes that transiently form in the endoplasmic reticulum (ER) and lack the core-subunits typical for AMPARs in the plasma membrane. Central components of these ER AMPARs are the proteome constituents FRRS1l (C9orf4) and CPT1c that specifically and cooperatively bind to the pore-forming GluA1-4 proteins of AMPARs. Bi-allelic mutations in the human FRRS1L gene are shown to cause severe intellectual disability with cognitive impairment, speech delay and epileptic activity. Virus-directed deletion or overexpression of FRRS1l strongly impact synaptic transmission in adult rat brain by decreasing or increasing the number of AMPARs in synapses and extra-synaptic sites. Our results provide insight into the early biogenesis of AMPARs and demonstrate its pronounced impact on synaptic transmission and brain function.