HTS081M
ChemiScreen Membrane Preparation
Recombinant Human TBXA2R (TP) Thromboxane Receptor
Human TP / TXA2 / PGH2 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
$765.00
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biological source
human
Quality Level
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
Human Full-length human TBXA2R cDNA encoding the TP short form (TPα)
TP receptors (Thromboxane A2 receptors) are widely distributed among different organ systems and have been localized on both cell membranes and intracellular structures. TP receptors belong to G protein-coupled receptor family (Hirata et al., 1991). Activation of TP receptors induces platelet aggregation, vascular and respiratory smooth muscle constriction, and enhances mitogenic responses of vascular smooth muscle cells that are stimulated by growth factors (Ali et al, 1993; Hanasaki et al., 1990). The human TP receptor is encoded by a single gene that is alternatively spliced at the carboxyl terminus, resulting in two isoforms, TPα (343 residues) and TPβ (407 residues). Both isoforms couple to Gq pathway, but couple oppositely to adenylate cyclase. The cDNA encoding human TPα has been stablely expressed in the Chem-1 host, which supports high levels of recombinant receptor expression on the cell surface and contains high levels of the promiscuous G protein Gα15 to couple the receptor to the calcium signaling pathway. The membrane preparations exhibit a Kd of 9.19 nM for [3H]-SQ 29548. With 10 nM [3H]-SQ 29548, 10 ug/well TP Membrane Prep yields greater than 5-fold signal-to-background ratio.
Application
Radioligand binding assay, and GTPγS binding.
Biochem/physiol Actions
GPCR Class: A
Protein Target: TP / TXA2 / PGH2
Target Sub-Family: Prostanoid
Packaging
200 units
Quality
Signal:background and specific binding values obtained in a competition binding assay with varying amounts of Y2 membrane prep:
1 unit = 10 μg membrane preparation
Bmax: 13.9 pmol/mg
Kd: 14.6 nM
| 10 µg/well | 5 µg/well | |
|---|---|---|
| Signal:Background | 6.6 | 4.6 |
| Specific Binding (cpm) | 2090 | 963 |
1 unit = 10 μg membrane preparation
Bmax: 13.9 pmol/mg
Kd: 14.6 nM
Specifications
Inucbation 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 50 mM 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]-SQ 29548 (Perkin Elmer # NET936)
Wash Buffer: 50 mM Hepes, pH 7.4, 500 mM NaCl , 0.1% BSA, filtered and stored at 4°C.
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 50 mM 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]-SQ 29548 (Perkin Elmer # NET936)
Wash Buffer: 50 mM Hepes, pH 7.4, 500 mM NaCl , 0.1% BSA, filtered and stored at 4°C.
Physical form
One package contains enough membranes for at least 200 assays (units), where an unit is the amount of membrane that will yield greater than 5-fold signal:background with 3H-labeled SQ 29548 at 15 nM. Liquid in packaging buffer: 50 mM Tris pH 7.4, 10% glycerol and 1% BSA with no preservatives. Packaging method: Membranes protein were adjusted to the indicated concentration in packaging buffer, rapidly frozen, and stored at -80°C.
Storage and Stability
Store at –70°C. Product is stable for at least 6 months from the date of receipt when stored as directed. Do not freeze and thaw.
Legal Information
CHEMICON is a registered trademark of Merck KGaA, Darmstadt, Germany
Disclaimer
RESEARCH USE ONLY. This product is regulated in France when intended to be used for scientific purposes, including for import and export activities (Article L 1211-1 paragraph 2 of the Public Health Code). The purchaser (i.e. enduser) is required to obtain an import authorization from the France Ministry of Research referred in the Article L1245-5-1 II. of Public Health Code. By ordering this product, you are confirming that you have obtained the proper import authorization.
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.
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
12 - Non Combustible Liquids
wgk_germany
WGK 2
Certificates of Analysis (COA)
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Biochemical characterization and comparison of rat thromboxane A2/prostaglandin H2 receptors in platelets and cultures aortic smooth muscle cells.
Hanasaki K., et al.
Biochemical Pharmacology, 38, 2967-2976 (1989)
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