Metabotropic glutamate receptor 1 (mGluR1) (mGluR1)

The Metabotropic glutamate receptor 1 (mGluR1), specifically the rat mGlu1a splice variant, is a Class C G protein-coupled receptor (GPCR) that plays a pivotal role in modulating excitatory neurotransmission in the central nervous system (UniProt: P23948). It primarily signals through the Gq/11 pathway, activating phospholipase C to trigger intracellular calcium release and protein kinase C activation (IUPHAR Guide to Pharmacology). mGlu1a is the longest splice variant of the Grm1 gene, characterized by an extensive C-terminal tail that facilitates interactions with scaffolding proteins like Homer, which are essential for its synaptic localization and signaling efficiency (PubMed: 11518769). This receptor is highly expressed in cerebellar Purkinje cells and is fundamental for motor coordination and the induction of long-term depression (LTD) at parallel fiber-Purkinje cell synapses. Clinically, mGluR1 is linked to neurodegenerative disorders such as spinocerebellar ataxia and psychiatric conditions like schizophrenia, making it a significant target for drug development (PubMed: 15140638). Therapeutic strategies often focus on allosteric modulators to achieve high selectivity and avoid the side effects associated with broad glutamatergic disruption.

Other names

mGlu1aGrm1Metabotropic glutamate receptor 1 alphaGlutamate receptor metabotropic 1mGluR1a

Negative allosteric modulation (NAM), positive allosteric modulation (PAM), and orthosteric antagonism of the glutamate binding site.