Recombinant Human IL-20R alpha Fc Chimera Protein, CF

Catalog # Availability Size / Price Qty
1176-IR-050
R&D Systems Recombinant Proteins and Enzymes
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Recombinant Human IL-20R alpha Fc Chimera Protein, CF Summary

Product Specifications

Purity
>90%, by SDS-PAGE under reducing conditions and visualized by silver stain
Endotoxin Level
<0.10 EU per 1 μg of the protein by the LAL method.
Activity
Measured by its binding ability in a functional ELISA. Immobilized rhIL-20 Ra/Fc Chimera at 1 µg/mL (100 µL/well) can bind rhIL-26 with a linear range of 0.3-20 ng/mL.
Source
Mouse myeloma cell line, NS0-derived human IL-20 R alpha protein
Human IL-20 R alpha
(Val30 - Lys250)
Accession # Q9UHF4
DIEGRMD Human IgG1
(Pro100 - Lys330)
N-terminus C-terminus
Accession #
N-terminal Sequence
Analysis
Val30
Structure / Form
Disulfide-linked homodimer
Predicted Molecular Mass
52 kDa (monomer)
SDS-PAGE
70-85 kDa, reducing conditions

Product Datasheets

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1176-IR

Carrier Free

What does CF mean?

CF stands for Carrier Free (CF). We typically add Bovine Serum Albumin (BSA) as a carrier protein to our recombinant proteins. Adding a carrier protein enhances protein stability, increases shelf-life, and allows the recombinant protein to be stored at a more dilute concentration. The carrier free version does not contain BSA.

What formulation is right for me?

In general, we advise purchasing the recombinant protein with BSA for use in cell or tissue culture, or as an ELISA standard. In contrast, the carrier free protein is recommended for applications, in which the presence of BSA could interfere.

1176-IR

Formulation Lyophilized from a 0.2 μm filtered solution in PBS.
Reconstitution Reconstitute at 100 μg/mL in sterile PBS.
Shipping The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below.
Stability & Storage: Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
  • 12 months from date of receipt, -20 to -70 °C as supplied.
  • 1 month, 2 to 8 °C under sterile conditions after reconstitution.
  • 3 months, -20 to -70 °C under sterile conditions after reconstitution.
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Reconstitution Calculator

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Background: IL-20R alpha

IL-20 receptor alpha (IL-20 R alpha ), also named IL-20 R1, CRF2-8, and ZCYTOR7, belongs to the class II cytokine receptor family, which includes 12 members. These receptors are characterized by the patterns of conserved amino acid (aa) residues in their extracellular domains, which are composed of tandem fibronectin type III domains (1). Class II cytokine receptors form heterodimeric signaling receptor complexes that mediate class II cytokine signals. Subunits of the different receptor complexes are shared and serve multiple functions (1).

The gene for human IL-20 R alpha is mapped to chromosome 6 and encodes a 553 aa glycoprotein with a 29 aa signal peptide, a 221 aa extracellular domain, a 24 aa transmembrane region and a 279 aa intracellular domain (2). IL-20 R alpha is widely expressed and is detected at high levels in multiple tissues including skin, testis, heart, placenta, salivary gland and prostate gland (1). The expression of IL-20 R alpha, together with that of IL-20 R beta, is upregulated in psoriatic skin lesions on keratinocytes, immune cells, and endothelial cells (1, 2).

IL-20 R alpha heterodimerizes with IL-20 R beta to form the functional receptor that mediates IL-19, IL-20 and IL-24 signals (3, 4). IL-20 R alpha also heterodimerizes with IL-10 R beta to form the functional receptor complex for IL-26 (5). Binding of these IL-10 family class II cytokines to their functional receptors induces activation of the JAK-STAT signal transduction pathway. At low ligand concentrations, STAT3 has been shown to be the predominant STAT proteins activated through either complexes (3 - 5).

References
  1. Kotenko, S.V. (2003) Cytokine & Growth Factor Reviews 13:223.
  2. Xie, M.H. et al. (2000) J. Biol. Chem. 275:31335.
  3. Dumoutier, L. et al. (2001) J. Immunol. 167:3534.
  4. Parrish-Novak, J. et al. (2002) J. Biol. Chem. 277:47517s.
  5. Sheikh. F. et al. (2004) J. Immunol. 172:2006.
Long Name
Interleukin 20 Receptor alpha
Entrez Gene IDs
53832 (Human); 237313 (Mouse)
Alternate Names
class II cytokine receptor ZCYTOR7; CRF2-8; Cytokine receptor class-II member 8; Cytokine receptor family 2 member 8; FLJ40993; IL-20 R alpha; IL20R alpha; IL-20R alpha; IL-20R1; IL-20R1IL-20 receptor subunit alpha; IL20RA; IL-20Ra; IL-20R-alpha; interleukin 20 receptor, alpha; interleukin-20 receptor I; interleukin-20 receptor subunit alpha; zcytor7

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