Metazoan evolution of glutamate receptors reveals unreported phylogenetic groups and divergent lineage-specific events

Glutamate receptors are divided in two unrelated families: ionotropic (iGluR), driving synaptic transmission, and metabotropic (mGluR), which modulate synaptic strength. The present classification of GluRs is based on vertebrate proteins and has remained unchanged for over two decades. Here we repor...

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Detalhes bibliográficos
Autores: Ramos Vicente, David, Ji, Jie, Gratacòs i Batlle, Esther, Gou, Gemma, Reig Viader, Rita, Luís, Javier, Burguera, Demian, Navas Pérez, Enrique, García Fernández, Jordi, Fuentes Prior, Pablo, Escriva, Hector, Roher Armentia, Nerea, Soto del Cerro, David, Bayés, Àlex
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2018
País:España
Recursos:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repositorio:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:2445/157419
Acesso em linha:https://hdl.handle.net/2445/157419
Access Level:acceso abierto
Palavra-chave:Receptors de neurotransmissors
Neurotransmitter receptors
Descrição
Resumo:Glutamate receptors are divided in two unrelated families: ionotropic (iGluR), driving synaptic transmission, and metabotropic (mGluR), which modulate synaptic strength. The present classification of GluRs is based on vertebrate proteins and has remained unchanged for over two decades. Here we report an exhaustive phylogenetic study of GluRs in metazoans. Importantly, we demonstrate that GluRs have followed different evolutionary histories in separated animal lineages. Our analysis reveals that the present organization of iGluRs into six classes does not capture the full complexity of their evolution. Instead, we propose an organization into four subfamilies and ten classes, four of which have never been previously described. Furthermore, we report a sister class to mGluR classes I-III, class IV. We show that many unreported proteins are expressed in the nervous system, and that new Epsilon receptors form functional ligand-gated ion channels. We propose an updated classification of glutamate receptors that includes our findings.

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