Metabotropni glutamatni receptor 8 je protein koji je kod ljudi kodiran genom.[1][2]
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Aminokiselina -glutamat je glavni ekscitatorni neurotransmiter u centralnom nervnom sistemu koji aktivira jonotropne i metabotropne glutamatne receptore. Glutamatergična neurotransmisija učestvuje u većini aspekata normalnih moždanih funkcija. Ona može da bude poremećena u mnogim neuropatološkim oboljenjima. Metabotropni glutamatni receptori su familija G protein spregnutih receptora, koja se deli u tri grupe na osnovu homologije sekvence, mehanizma prenosa signala, i farmakoloških svojstava. Grupa I obuhvata i . Ovi receptori aktiviraju fosfolipazu C. Grupa II obuhvata i , dok su u grupi III , , , i . Receptori grupe II i III su vezani za inhibiciju kaskade cikličnog AMP-a ali se razlikuju u njihovim selektivnostima za agoniste. Alternativne splajsne varijante su poznate, ali njihova svojstava nisu potpuno određena.[2]
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