Description
Metabotropic glutamate receptors (mGluR) function to modulate excitatory synaptic transmission in the brain. Eight subtypes (1-
8) and multiple splice variants of the mGluR have been identified and grouped based on their pharmacological properties. Group I mGluRs (subtypes 1 and 5) activate the phosphatidyl inositol pathway, while Group II (2 and 3) and Group III (4, 6, 7, and 8) inhibit adenylyl cyclase. L-
AP4, an analog of L-
glutamic acid, is a selective Group III mGluR agonist that functions presynaptically to suppress glutamate release (IC
50 = 2.5 μM). L-
AP4 has been shown to depress synaptic transmission in glutamatergic pathways in the hippocampus, olfactory bulb, and retina as well as act as an agonist at the quisqualate-
sensitized AP6 site in hippocampus.
Chemical Properties
white to off-white crystalline powder
Uses
Metabotropic glutamate receptors (mGluR) function to modulate excitatory synaptic transmission in the brain. Eight subtypes (1-8) and multiple splice variants of the mGluR have been identified and grouped based on their pharmacological properties. Group I mGluRs (subtypes 1 and 5) activate the phosphatidyl inositol pathway, while Group II (2 and 3) and Group III (4, 6, 7, and 8) inhibit adenylyl cyclase. L-AP4, an analog of L-glutamic acid, is a selective Group III mGluR agonist that functions presynaptically to suppress glutamate release (IC50 = 2.5 μM). L-AP4 has been shown to depress synaptic transmission in glutamatergic pathways in the hippocampus, olfactory bulb, and retina as well as act as an agonist at the quisqualate-sensitized AP6 site in hippocampus.
Uses
L(+)-2-Amino-4-phosphonobutanoic acid (L-AP4) is a mGluR-4/6 receptor agonist.
Definition
ChEBI: (2S)-2-amino-4-phosphonobutanoic acid is a non-proteinogenc L-alpha-amino acid that is L-alpha-aminobutyric acid in which one of the hydrogens of the terminal methyl group has been replaced by a dihydroxy(oxido)-lambda(5)-phosphanyl group. It is a potent and selective agonist for the group III metabotropic glutamate receptors (mGluR4/6/7/8). It has a role as a metabotropic glutamate receptor agonist. It is a non-proteinogenic L-alpha-amino acid and a member of phosphonic acids.
Biological Activity
Selective group III metabotropic glutamate receptor agonist. Synaptic depressant. Agonist at the quisqualate-sensitized AP6 site in hippocampus. Also available as part of the Group III mGlu Receptor Tocriset™ and Mixed mGlu Receptor Tocriset™ .
