HTS146M
ChemiSCREEN Membrane Preparation Recombinant Human mGLU2 Metabotropic Glutamate Receptor
Human mGlu2 GPCR membrane preparation for Radioligand binding Assays & GTPγS binding.
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About This Item
UNSPSC Code:
41106514
eCl@ss:
32161000
NACRES:
NA.41
biological source
human
recombinant
expressed in Chem-1 cells
manufacturer/tradename
ChemiScreen
Chemicon®
technique(s)
ligand binding assay: suitable (GTPγS)
radioligand binding assay (RLBA): suitable
NCBI accession no.
UniProt accession no.
shipped in
dry ice
General description
Glutamate is a main excitatory neurotransmitter in the central nervous system, and it plays a role in learning, memory and neurotoxicity. The biological actions of glutamate are mediated by ionotropic and metabotropic glutamate receptors, which are ion channels and GPCRs respectively. Metabotropic glutamate receptors (mGluRs) are members of the class 3 G-protein coupled receptor family, which are characterized by a large extracellular domain. They are further classified into group I, II, and III mGluRs on the basis of their sequence identity, pharmacology, and signal transduction mechanism. Group I (mGlu1 and mGlu5) couple to the phospholipase C pathway through Gαq, whereas group II (mGlu2 and mGlu3) and group III (mGlu4, mGlu6, mGlu7, and mGlu8) negatively couple to the adenylyl cyclase pathway though Gαi (Conn and Pin, 1997). Agonists of the Group II metabotropic glutamate receptors, mGlu2 and mGlu3, display efficacy in animal models of anxiety and psychosis. A key role for mGlu2 in mediating these effects is indicated by the observation that selective allosteric potentiator of mGlu2 also retains antipsychotic-like activities in mice (Galici et al., 2005). In addition, mGlu2/3 agonists display analgesic activity in animal models (Jones et al., 2005). Chemicon′s mGlu2 membrane preparations are crude membrane preparations made from our proprietary stable recombinant cell lines to ensure high-level of GPCR surface expression; thus, they are ideal HTS tools for screening of mGlu2 interactions with its ligands. The cell line exhibits a calcium response with EC50s of 0.51uM, 5.6uM, and 8.3uM for DCG IV, (2R4R) APDC, and glutamate. The membrane preparations exhibit EC50s of of 0.72uM, 5.07uM, and 6.29uM for DCG IV, (2R4R) APDC, and glutamate in a GTPγS binding assay.
human GRM2 cDNA encoding mGlu2
Application
Radioligand binding assay and GTPγS binding
Biochem/physiol Actions
GPCR Class: C
Protein Target: mGlu2
Target Sub-Family: Glutamate (metabotropic)
Quality
EC50 in GTPγS binding assay by Glutamate: ~ 6.29 μM
EC50 in GTPγS binding assay by (2R4R) APDC: ~ 5.07 μM
EC50 in GTPγS binding assay by DCG IV: ~ 0.72 μM
EC50 in GTPγS binding assay by (2R4R) APDC: ~ 5.07 μM
EC50 in GTPγS binding assay by DCG IV: ~ 0.72 μM
Specifications
Inucbation Conditions
Membranes are permeabilized by addition of saponin to an equal concentration by mass, then mixed with [35S]-GTPγS (final concentration of 0.1 nM) in 20 mM HEPES, pH 7.4/100 mM NaCl/10 mM MgCl2/0.5 µM GDP in a nonbinding 96-well plate. Unlabeled DCG IV, (2R4R) APDC, and glutamate are added to the final concentration indicated in Figure 1 (final volume 100 µL), and incubated for 30 min at 30°C. The binding reaction is transferred to a GF/B filter plate (Millipore MAHF B1H) previously prewetted with water, and washed 3 times (1 mL per well per wash) with cold 10 mM sodium phosphate, pH 7.4. The plate is dried and counted.
One vial contains enough membranes for at least 200 assays (units), where one unit is the amount of membrane that will yield greater than 1000 cpm specific DCG IV, (2R4R) APDC, or glutamate -stimulated [35S]-GTPγS binding.
The mGlu2 membrane preparation is expected to be functional in a radioligand binding assay; however, the end user will need to determine the optimal radiolabeled ligand for use with this product.
Membranes are permeabilized by addition of saponin to an equal concentration by mass, then mixed with [35S]-GTPγS (final concentration of 0.1 nM) in 20 mM HEPES, pH 7.4/100 mM NaCl/10 mM MgCl2/0.5 µM GDP in a nonbinding 96-well plate. Unlabeled DCG IV, (2R4R) APDC, and glutamate are added to the final concentration indicated in Figure 1 (final volume 100 µL), and incubated for 30 min at 30°C. The binding reaction is transferred to a GF/B filter plate (Millipore MAHF B1H) previously prewetted with water, and washed 3 times (1 mL per well per wash) with cold 10 mM sodium phosphate, pH 7.4. The plate is dried and counted.
One vial contains enough membranes for at least 200 assays (units), where one unit is the amount of membrane that will yield greater than 1000 cpm specific DCG IV, (2R4R) APDC, or glutamate -stimulated [35S]-GTPγS binding.
The mGlu2 membrane preparation is expected to be functional in a radioligand binding assay; however, the end user will need to determine the optimal radiolabeled ligand for use with this product.
Physical form
Liquid in packaging buffer: 50 mM Tris pH 7.4, 10% glycerol and 1% BSA with no preservatives.
Packaging method: Membrane protein was adjusted to 1 mg/ml in packaging buffer, rapidly frozen, and stored at -80°C.
Packaging method: Membrane protein was adjusted to 1 mg/ml in packaging buffer, rapidly frozen, and stored at -80°C.
Storage and Stability
Maintain frozen at -70°C for up to 2 years. Do not freeze and thaw.
Legal Information
CHEMICON is a registered trademark of Merck KGaA, Darmstadt, Germany
Disclaimer
Unless otherwise stated in our catalog or other company documentation accompanying the product(s), our products are intended for research use only and are not to be used for any other purpose, which includes but is not limited to, unauthorized commercial uses, in vitro diagnostic uses, ex vivo or in vivo therapeutic uses or any type of consumption or application to humans or animals.
Storage Class
10 - Combustible liquids
wgk_germany
WGK 2
Certificates of Analysis (COA)
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Find documentation for the products that you have recently purchased in the Document Library.
Pharmacology and functions of metabotropic glutamate receptors.
Conn, P J and Pin, J P
Annual Review of Pharmacology and Toxicology, 37, 205-237 (1997)
A selective allosteric potentiator of metabotropic glutamate (mGlu) 2 receptors has effects similar to an orthosteric mGlu2/3 receptor agonist in mouse models predictive of antipsychotic activity
Galici, Ruggero, et al
Journal of Pharmacology and Experimental Therapeutics, 315, 1181-1187 (2005)
Analgesic effects of the selective group II (mGlu2/3) metabotropic glutamate receptor agonists LY379268 and LY389795 in persistent and inflammatory pain models after acute and repeated dosing
Jones, Carrie K, et al
Neuropharmacology, 49 Suppl 1, 206-218 (2005)
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