Metabotropic glutamate receptor 3: Difference between revisions

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'''Metabotropic glutamate receptor 3''' (mGluR3) is a type of [[metabotropic glutamate receptor]] that is encoded by the GRM3 gene in humans. These receptors are part of the [[G protein-coupled receptor]] family and are involved in a variety of physiological processes in the [[central nervous system]].
{{DISPLAYTITLE:Metabotropic Glutamate Receptor 3}}
 
== Metabotropic Glutamate Receptor 3 ==
 
[[File:ML337-d3.png|thumb|right|Chemical structure of ML337, a selective mGlu3 receptor modulator.]]
 
'''Metabotropic glutamate receptor 3''' (mGlu3) is a type of [[G protein-coupled receptor]] (GPCR) that is activated by the neurotransmitter [[glutamate]]. It is one of the eight metabotropic glutamate receptors, which are divided into three groups based on their sequence homology, signal transduction mechanisms, and pharmacological properties.
 
== Structure ==
 
Metabotropic glutamate receptor 3 is a member of the [[Class C GPCR]] family. Like other members of this family, mGlu3 has a large extracellular domain that binds glutamate, a seven-transmembrane domain that spans the cell membrane, and an intracellular domain that interacts with G proteins. The receptor is typically found as a dimer, which is important for its function.


== Function ==
== Function ==


mGluR3 receptors are found in various parts of the brain, including the [[cerebral cortex]], [[hippocampus]], and [[basal ganglia]]. They are predominantly located on [[astrocytes]], a type of glial cell, and on the presynaptic terminals of neurons.  
mGlu3 receptors are primarily involved in modulating synaptic transmission and neuronal excitability. They are predominantly expressed in the [[central nervous system]], including the [[cerebral cortex]], [[hippocampus]], and [[thalamus]]. Activation of mGlu3 receptors can lead to the inhibition of [[adenylyl cyclase]], resulting in decreased levels of [[cyclic AMP]] (cAMP) and modulation of various downstream signaling pathways.


The primary function of mGluR3 is to modulate the release of [[glutamate]], the main excitatory neurotransmitter in the brain. This modulation is achieved through a negative feedback mechanism, where activation of mGluR3 by glutamate inhibits further glutamate release. This helps to maintain the balance of excitation and inhibition in the brain, which is crucial for normal brain function.
== Pharmacology ==


== Clinical significance ==
The pharmacological modulation of mGlu3 receptors has been of significant interest due to their potential therapeutic applications. Selective agonists and antagonists have been developed to study the receptor's function and its role in various neurological disorders. ML337 is a selective positive allosteric modulator of mGlu3, which has been used in research to explore the receptor's potential as a drug target.


Alterations in mGluR3 function have been implicated in several neurological and psychiatric disorders. For example, reduced mGluR3 expression has been observed in the brains of individuals with [[schizophrenia]], suggesting a potential role in the pathophysiology of this disorder. Similarly, variations in the GRM3 gene have been associated with the risk of developing [[bipolar disorder]] and [[major depressive disorder]].
== Clinical Significance ==


In addition, mGluR3 has been proposed as a potential therapeutic target for the treatment of various conditions, including [[neurodegenerative diseases]] such as [[Alzheimer's disease]] and [[Parkinson's disease]], as well as [[chronic pain]] and [[drug addiction]].
mGlu3 receptors have been implicated in several neurological and psychiatric disorders, including [[schizophrenia]], [[anxiety]], and [[depression]]. Modulation of mGlu3 receptor activity is being investigated as a potential therapeutic strategy for these conditions. The receptor's role in neuroprotection and [[neuroinflammation]] also makes it a target of interest in [[neurodegenerative diseases]] such as [[Alzheimer's disease]] and [[Parkinson's disease]].


== See also ==
== Related pages ==


* [[Metabotropic glutamate receptor]]
* [[Metabotropic glutamate receptor]]
* [[G protein-coupled receptor]]
* [[G protein-coupled receptor]]
* [[Glutamate (neurotransmitter)]]
* [[Glutamate]]
 
* [[Neurotransmitter]]
== References ==
 
{{Reflist}}


[[Category:Glutamate receptors]]
[[Category:G protein-coupled receptors]]
[[Category:G protein-coupled receptors]]
[[Category:Neurotransmitter receptors]]
[[Category:Neuroscience]]
[[Category:Human proteins]]
{{GPCR-stub}}
{{neuroscience-stub}}

Latest revision as of 06:11, 16 February 2025


Metabotropic Glutamate Receptor 3[edit]

Chemical structure of ML337, a selective mGlu3 receptor modulator.

Metabotropic glutamate receptor 3 (mGlu3) is a type of G protein-coupled receptor (GPCR) that is activated by the neurotransmitter glutamate. It is one of the eight metabotropic glutamate receptors, which are divided into three groups based on their sequence homology, signal transduction mechanisms, and pharmacological properties.

Structure[edit]

Metabotropic glutamate receptor 3 is a member of the Class C GPCR family. Like other members of this family, mGlu3 has a large extracellular domain that binds glutamate, a seven-transmembrane domain that spans the cell membrane, and an intracellular domain that interacts with G proteins. The receptor is typically found as a dimer, which is important for its function.

Function[edit]

mGlu3 receptors are primarily involved in modulating synaptic transmission and neuronal excitability. They are predominantly expressed in the central nervous system, including the cerebral cortex, hippocampus, and thalamus. Activation of mGlu3 receptors can lead to the inhibition of adenylyl cyclase, resulting in decreased levels of cyclic AMP (cAMP) and modulation of various downstream signaling pathways.

Pharmacology[edit]

The pharmacological modulation of mGlu3 receptors has been of significant interest due to their potential therapeutic applications. Selective agonists and antagonists have been developed to study the receptor's function and its role in various neurological disorders. ML337 is a selective positive allosteric modulator of mGlu3, which has been used in research to explore the receptor's potential as a drug target.

Clinical Significance[edit]

mGlu3 receptors have been implicated in several neurological and psychiatric disorders, including schizophrenia, anxiety, and depression. Modulation of mGlu3 receptor activity is being investigated as a potential therapeutic strategy for these conditions. The receptor's role in neuroprotection and neuroinflammation also makes it a target of interest in neurodegenerative diseases such as Alzheimer's disease and Parkinson's disease.

Related pages[edit]