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48-602MAG
Buffer Detection Kit for Magnetic Beads
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HTS116M
Sigma-AldrichChemiSCREEN™ Human M3 Muscarinic Acetylcholine Receptor Membrane Preparation
Human M3 GPCR membrane preparation for Radioligand binding Assays & GTPγS binding.
ChemiSCREEN™ Human M3 Muscarinic Acetylcholine Receptor Membrane Preparation
Overview
Full-length human CHRM3 cDNA encoding M3
Background Information
The muscarinic acetylcholine receptor (mAChR) family consists of five GPCRs that mediate some of the neurotransmission functions of acetylcholine in the CNS and the periphery. The M1, M3 and M5 receptors couple to Gq to mobilize intracellular calcium, whereas the M2 and M4 receptors couple to Gi/o to inhibit cAMP production (Caulfield and Birdsall, 1998). M3 is expressed prominently in smooth muscle, and plays a primary role in mediating mAChR agonist-induced contractility. Mice lacking M3 have dilated pupils, which indicates a role for M3 in regulating tone of the pupillary sphincter muscle. In addition, Msub3 plays a role in feeding, as indicated by the lean and hypophagic phenotype of M3-null mice (Wess, 2004). Chemicon's M3 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 antagonists of M3 interactions with 4-DAMP. The membrane preparations exhibit a Kd of 0.72-1 nM for [3H]-4-DAMP. With 10 µg/well M3 Membrane Prep and 0.75 nM [3H]-4-DAMP, a greater than 4-fold signal-to-background ratio was obtained.
References
Product Information
Format
Membranes
Presentation
Liquid in packaging buffer: 50 mM Tris pH 7.4, 10% glycerol and 1% BSA no preservatives. Packaging method: Membranes protein were adjusted to 0.5 mg/ml in 1 mL packaging buffer, rapidly frozen, and stored at -80°C.
The muscarinic cholinergic receptors belong to a larger family of G protein-coupled receptors. The functional diversity of these receptors is defined by the binding of acetylcholine and includes cellular responses such as adenylate cyclase inhibition, phosphoinositide degeneration, and potassium channel mediation. Muscarinic receptors influence many effects of acetylcholine in the central and peripheral nervous system. The muscarinic cholinergic receptor 3 controls smooth muscle contraction and its stimulation causes secretion of glandular tissue.
FUNCTION: SwissProt: P20309 # The muscarinic acetylcholine receptor mediates various cellular responses, including inhibition of adenylate cyclase, breakdown of phosphoinositides and modulation of potassium channels through the action of G proteins. Primary transducing effect is Pi turnover. SIZE: 590 amino acids; 66128 Da SUBCELLULAR LOCATION: Basolateral cell membrane; Multi-pass membrane protein. SIMILARITY: SwissProt: P20309 ## Belongs to the G-protein coupled receptor 1 family.
Incubation Conditions
Membranes are mixed with radioactive ligand and unlabeled competitor (see Figures 1 and 2 for concentrations tested) in binding buffer in a nonbinding 96-well plate, and incubated for 1-2 h. Prior to filtration, a GF/C 96-well filter plate is coated with 0.33% polyethyleneimine for 30 min, then washed with 50mM HEPES, pH 7.4, 0.5% BSA. Binding reaction is transferred to the filter plate, and washed 3 times (1 mL per well per wash) with Wash Buffer. The plate is dried and counted. Binding buffer: 50 mM Hepes, pH 7.4, 5 mM MgCl2, 1 mM CaCl2, 0.2% BSA, filtered and stored at 4°C Radioligand: [3H]-4-DAMP (Perkin Elmer#:NET1040 ) Wash Buffer: 50 mM Hepes, pH 7.4, 500mM NaCl , 0.1% BSA, filtered and stored at 4°C. One package contains enough membranes for at least 200 assays (units), where a unit is the amount of membrane that will yield greater than 4-fold signal:background with 3H labeled 4-DAMP at 0.75 nM
Physicochemical Information
Dimensions
Materials Information
Toxicological Information
Safety Information according to GHS
Safety Information
Product Usage Statements
Signal:background and specific binding values obtained in a competition binding assay with varying amounts of M3 membrane prep:
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 and Shipping Information
Storage Conditions
Maintain frozen at -70°C for up to 2 years. Do not freeze and thaw.
Packaging Information
Material Size
200 units
Transport Information
Supplemental Information
Specifications
Global Trade Item Number
Bestellnummer
GTIN
HTS116M
04053252678844
Documentation
ChemiSCREEN™ Human M3 Muscarinic Acetylcholine Receptor Membrane Preparation SDB
Muscarinic acetylcholine receptors (mAChRs; M1-M5) play key roles in regulating the activity of many important functions of the central and peripheral nervous system. Because of the lack of ligands endowed with a high degree of receptor subtype selectivity and the fact that most tissues or cell types express two or more mAChR subtypes, identification of the physiological and pathophysiological roles of the individual mAChR subtypes has proven a difficult task. To circumvent these difficulties, several laboratories recently employed gene-targeting techniques to generate mutant mouse strains deficient in each of the five mAChR subtypes. Phenotyping studies showed that each mutant mouse line displayed characteristic physiological, pharmacological, behavioral, biochemical, or neurochemical deficits. The novel insights gained from these studies should prove instrumental for the development of novel classes of muscarinic drugs.
International Union of Pharmacology. XVII. Classification of muscarinic acetylcholine receptors Caulfield, M P and Birdsall, N J Pharmacol Rev, 50:279-90 (1998)
1998
Millipore offers a large selection of robust and reliable G-protein coupled receptor products, including Stable Cell Lines, Membrane Preparations, and Frozen Cells. See below for GPCR research tools. Weitere Informationen >>
