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HTS125M ChemiScreen™ Membrane Preparation
Recombinant Human SST4 SOMATOSTATIN RECEPTOR

Human sst4 GPCR membrane preparation for Radioligand binding Assays & GTPγS binding.

Ficha de datos de seguridad (MSDS o SDS), certificado de análisis y de calidad (CoA y CoQ), expedientes, folletos y otros documentos disponibles.
Host Cell: Chem-1 Uni Prot Number: P31391 Entrez Gene Number: NM_001052.2
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HTS125M
2 mL  200 units
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      Descripción

      Tabla espec. clave

      SpeciesHost CellsProtein Target
      Human Chem-1sst4
      Description
      Catalogue NumberHTS125M
      Brand Family Chemicon®
      Trade Name
      • ChemiScreen
      • Chemicon
      DescriptionChemiScreen™ Membrane Preparation
      Recombinant Human SST4 SOMATOSTATIN RECEPTOR
      OverviewHuman SSTR4 encoding SST4
      Background InformationSomatostatin is a 14 or 28 amino acid regulatory peptide that inhibits hormone secretion from the pituitary, pancreas, and other endocrine sites. A family of 6 GPCRs, sst1, sst2A, sst2B, sst3, sst4 and sst5, mediate the biological activity of somatostatins. The somatostatin receptors couple to Gi to inhibit cAMP production, and also increase MAP kinase signalling. Several tumors have been shown to overexpress somatostatin receptors, and binding of somatostatin to these tumor cells stimulates or inhibits proliferation, depending on the receptor subtypes expressed (Olias et al., 2004). Somatostatin has been implicated in seizure susceptibility in animal models, and activation of sst4 with selective agonists increases seizure activity (Moneta et al., 2002). Chemicon's SST4 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 SST4 interactions with somatostatin. The membrane preparations exhibit a Kd of 1.78 nM for [125I]-Somatostatin 14. With 5 ug/well SST4 Membrane Prep and 1 nM [125I]-Somatostatin 14, a greater than 20-fold signal-to-background ratio was obtained.
      Product Information
      FormatMembranes
      PresentationOne package contains enough membranes for at least 200 assays (units), where an unit is the amount of membrane that will yield greater than 20-fold signal:background with 125I-labeled somatostatin 14 at 1 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.
      Quality LevelMQ100
      Applications
      ApplicationHuman sst4 GPCR membrane preparation for Radioligand binding Assays & GTPγS binding.
      Key Applications
      • Radioligand binding assay
      • GTPγS binding
      Application NotesRadioligand binding assay, and GTPγS binding.
      Biological Information
      Entrez Gene Number
      Entrez Gene SummarySomatostatin acts at many sites to inhibit the release of many hormones and other secretory proteins. The biologic effects of somatostatin are probably mediated by a family of G protein-coupled receptors that are expressed in a tissue-specific manner. SSTR4 is a member of the superfamily of receptors having seven transmembrane segments and is expressed in highest levels in fetal and adult brain and lung.
      Gene Symbol
      • SSTR4
      • SS4R
      GPCR ClassA
      Host CellsChem-1
      Protein Targetsst4
      Target Sub-FamilySomatostatin
      UniProt Number
      UniProt SummaryFUNCTION: SwissProt: P31391 # Receptor for somatostatin-14. The activity of this receptor is mediated by G proteins which inhibits adenylyl cyclase. It is functionally coupled not only to inhibition of adenylate cyclase, but also to activation of both arachidonate release and mitogen-activated protein (MAP) kinase cascade. Mediates antiproliferative action of somatostatin in tumor cells.
      SIZE: 388 amino acids; 41895 Da
      SUBCELLULAR LOCATION: Cell membrane; Multi-pass membrane protein.
      TISSUE SPECIFICITY: Specifically expressed in fetal and adult brain, lung tissue, stomach, and in lesser quantities in the kidney, pituitary and adrenals.
      SIMILARITY: SwissProt: P31391 ## Belongs to the G-protein coupled receptor 1 family.
      Incubation ConditionsMembranes 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: [125I]-Somatostatin 14 (Perkin Elmer # NEX389)
      Wash Buffer: 50 mM Hepes, pH 7.4, 500 mM NaCl , 0.1% BSA, filtered and stored at 4°C.
      Product Usage Statements
      Quality AssuranceSPECIFICATIONS: 1 unit = 5 μg membrane preparation
      Bmax: 28.2 pmol/mg
      Kd: 1.78 nM
      Usage Statement
      • 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 ConditionsMaintain frozen at -70°C for up to 2 years. Do not freeze and thaw.
      Packaging Information
      Material Size2 mL
      Material Package200 units
      Global Trade Item Number
      Número de referencia GTIN
      HTS125M 04053252329517