ChemiScreen Recombinant Human Glucagon Receptor Membrane Preparation

产品说明

一般描述

Glucagon is a 29-amino acid peptide that stimulates glycogenolysis and gluconeogenesis in the liver to increase blood glucose. The receptor for glucagon is a class 2 (or class B) GPCR that signals through G_s to stimulate cAMP production (Mayo et al., 2003). Mice lacking the glucagon receptor have mild hypoglycemia after fasting, and exhibit hyperplasia of pancreatic α-cells (Gelling et al., 2003). Because of its role in promoting hyperglycemia, the glucagon receptor presents a potential target for treatment of diabetes. Chemicon′s glucagon receptor 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 glucagon receptor interactions and its ligands. The membrane preparations exhibit a Kd of 3.09 nM for [¹²⁵I]-glucagon. With 1 nM [¹²⁵I]-glucagon, 5 or 10 μg/well glucagon receptor Membrane Prep yields greater than 10-fold signal-to-background ratio.
TRANSFECTION: Full-length human GCGR cDNA encoding Glucagon Receptor
HOST CELLS: Chem-1, an adherent mammalian cell line with no endogenous glucagon receptor expression.

生化/生理作用

GPCR Class: B
Target Sub-Family: Glucagon

质量

SPECIFICATIONS:
1 unit = 5 μg
B_max for [¹²⁵I] glucagon binding: 16.7 pmol/mg protein
K_d for [¹²⁵I] glucagon binding: ~ 3.09 nM

Signal:background and specific binding values obtained in a competition binding assay with varying amounts of Glucagon receptor membrane prep:

产品规格

Inucbation Conditions
RECOMMENDED ASSAY CONDITIONS: Membranes are mixed with radioactive ligand and unlabeled competitor 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: [¹²⁵I]-glucagon (Perkin Elmer#:NEX-207)
• 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 10-fold signal:background with [¹²⁵I]-labeled glucagon at 1 nM

外形

Liquid in packaging buffer: 50 mM Tris pH 7.4, 10% glycerol and 1% BSA; no preservatives.
Packaging method: Membrane proteins were adjusted to 0.5 mg/ml in 1 ml packaging buffer, rapidly frozen, and stored at -80°C.

法律信息

CHEMICON is a registered trademark of Merck KGaA, Darmstadt, Germany

免责声明

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.

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