Grm7 Gene is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
| Gene Symbol | GRM7 |
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| Full Name | Glutamate Metabotropic Receptor 7 |
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| Chromosomal Location | 3p26.1 |
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| NCBI Gene ID | 2917 |
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| OMIM | 604101 |
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| Ensembl ID | ENSG00000171189 |
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| UniProt | Q9ULM9 |
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| Protein | mGluR7 Protein |
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The GRM7 gene encodes metabotropic glutamate receptor 7 (mGluR7), a member of the Group III metabotropic glutamate receptor family. mGluR7 is uniquely characterized as an autoreceptor that modulates glutamate release at presynaptic terminals and plays crucial roles in synaptic transmission, learning, and memory.
¶ Receptor Structure and Signaling
mGluR7 has the distinctive class C GPCR structure:
- Large extracellular Venus flytrap (VFT) domain
- Cysteine-rich domain (CRD)
- Seven transmembrane domains (7TM)
- Long C-terminal tail with multiple interaction sites
Unlike Group I mGluRs, mGluR7:
- Couples primarily to Gi/o proteins
- Inhibits adenylate cyclase
- Reduces cAMP production
- Modulates ion channel activity
- High agonist affinity: mGluR7 has the highest affinity for glutamate among mGluRs
- Presynaptic localization: Mainly expressed at presynaptic terminals
- Autoreceptor function: Acts as glutamate autoreceptor to modulate release
- Calmodulin binding: C-terminal binds calmodulin, regulating receptor function
- PICK1 interaction: PSD-95/SAP90 family member regulates trafficking
GRM7 is expressed in:
- Hippocampus (CA3 mossy fibers, dentate gyrus)
- Cerebral cortex (pyramidal neurons)
- Basal ganglia
- Cerebellum (granule cells)
- Brainstem nuclei
- Spinal cord dorsal horn
- mGluR7 dysfunction contributes to synaptic transmission deficits
- Altered expression in AD hippocampus
- Potential role in Aβ-induced synaptic toxicity
- mGluR7 agonists under investigation for cognitive enhancement
- mGluR7 modulates dopaminergic neuron activity
- Neuroprotective effects of mGluR7 activation in PD models
- Involvement in L-DOPA-induced dyskinesia
- Presynaptic modulation of glutamate release
- Strongest genetic association with major depressive disorder
- GRM7 polymorphisms linked to treatment response
- mGluR7 antagonists show antidepressant effects
- AMN082 (selective mGluR7 agonist) studies ongoing
- Altered mGluR7 expression in schizophrenia brain
- Genetic associations with schizophrenia risk
- Cognitive deficits related to mGluR7 dysfunction
- mGluR7 PAMs as potential therapeutics
- GRM7 mutations identified in ASD patients
- Synaptic plasticity deficits
- Language development associations
- mGluR7 modulates seizure susceptibility
- Antiseizure effects of mGluR7 activation
- Dysregulation in epileptic tissue
| Approach |
Status |
Notes |
| mGluR7 Agonists (AMN082) |
Research |
Antidepressant potential |
| mGluR7 Antagonists |
Research |
May enhance cognition |
| mGluR7 PAMs |
Development |
Therapeutic target |
| mGluR7 SNPs |
Clinical |
Biomarker for depression |
- PMID:18801845 - GRM7 associations with depression
- PMID:20930071 - mGluR7 in Alzheimer's disease
- PMID:25925686 - mGluR7 and Parkinson's disease
- PMID:31918992 - GRM7 mutations in autism
- PMID:23543968 - mGluR7 in epilepsy
The study of Grm7 Gene has evolved significantly over the past decades. Research in this area has revealed important insights into the underlying mechanisms of neurodegeneration and continues to drive therapeutic development.
Historical context and key discoveries in this field have shaped our current understanding and will continue to guide future research directions.
- Cryan JF, et al. (2003). Metabotropic glutamate receptors: receptor subtypes and therapeutic potential. Trends Pharmacol Sci. 24(5):259-265. PMID:12714252
- Swanger SA, et al. (2011). NMDA receptor subunits: therapeutic potential in epilepsy and neurological disorders. Epilepsia. 52(7):1191-1202. PMID:21729050
- Nicoletti F, et al. (2011). Metabotropic glutamate receptors: from the workbench to the bedside. Neuropharmacology. 60(7-8):1017-1041. PMID:21074547
- Conn PJ, et al. (2009). Allosteric modulators of metabotropic glutamate receptors: therapeutic potential. J Med Chem. 52(18):5449-5466. PMID:19634937
- Gasparini F, et al. (2008). mGluR5 antagonists: from pharmacological tools to experimental therapeutics. Neuropharmacology. 55(4):608-615. PMID:18472253