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ChemiScreen™ Membrane Preparation Human Recombinant CXCR5

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货号：HTS055M

品牌：Millipore 密理博

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Replacement Information

重要规格表

Species Host Cells Protein Target
Human Chem-5 CXCR5
Description
Catalogue Number HTS055M
Brand Family Chemicon®
Trade Name
  • ChemiScreen
  • Chemicon
Description ChemiSCREEN™ Membrane Preparation Recombinant Human CXCR5 Chemokine Receptor
Overview Human CXCR5
Background Information CXCR5 (also known as BLR1) is a GPCR that binds selectively to the chemokine CXCL13 (also known as BLC and BCA-1) to mediate immune system development and function (Förster et al., 1996; Gunn et al., 1998). CXCR5 cooperates with CCR7 to determine functional organization of lymphoid organs such as lymph nodes and Peyer’s patches (Ohl et al., 2003). In addition, CXCR5 mediates migration of B cells into the follicles of the splenic white pulp, thus permitting antigen deposition on follicular dendritic cells (Förster et al., 1996; Cinamon et al., 2008). Patients with rheumatoid arthritis (RA) displayed upregulated expression of CXCR5 to a greater extent than other chemokine receptors, and CXCR5-null mice subjected to antigen-induced arthritis display reduced joint destruction (Schmutz et al, 2004; Wengner et al, 2007). Therefore, CXCR5 represents a potential target for treatment of rheumatoid arthritis. Millipore's CXCR5 Membrane Preparation for GTPγS Assay is a crude membrane preparation made from the proprietary stable recombinant cell line that is also used for Millipore’s CXCR5 Calcium Optimized Cell Line (HTS055C). This CXCR5 Membrane Preparation has been optimized for low basal activity in GTPγS binding assays; thus it is an ideal HTS tool for screening of compounds for agonist and antagonist activities. The membrane preparations exhibits EC50 of 1.8 nM for CXCL13 in a GTPγS binding assay.
References
Product Information
Format Membranes
Presentation 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 the indicated concentration in packaging buffer, rapidly frozen, and stored at -80°C.
Applications
Application Human CXCR5 GPCR membrane preparation for Radioligand binding Assays & GTPγS binding.
Key Applications
  • Radioligand binding assay
  • GTPγS binding
Application Notes Radioligand binding assay and GTPγS binding
Biological Information
Entrez Gene Number
Gene Symbol
  • CXCR5
  • BLR1
  • MDR15
GPCR Class A
Host Cells Chem-5
Protein Target CXCR5
Target Sub-Family Chemokine
UniProt Number
Incubation Conditions Membranes are permeabilized by addition of saponin to an equal concentration by mass, then mixed with [35S]-GTPγS (final concentration of 0.3 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 CXCL13 was 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 an FB filter plate (Millipore MAHF B1H) previously prewetted with water. The plate is washed 3 times (1 mL per well per wash) with cold 10 mM sodium phosphate, pH 7.4, then dried and counted.

One package 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 CXCL13-stimulated [35S]-GTPγS binding.
Physicochemical Information
Dimensions
Materials Information
Toxicological Information
Safety Information according to GHS
Safety Information
Product Usage Statements
Quality Assurance 1 unit = 5 μg
EC50 in GTPγS binding assay by CXCL13: ~ 1.8 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 Conditions 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.
Packaging Information
Material Size 200 units
Transport Information
Supplemental Information
Specifications

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