Product Specifications for Recombinant Human IL-22 R alpha 1 Protein, CF
Mouse myeloma cell line, NS0-derived human IL-22 R alpha 1 protein Pro18-Thr228, with a C-terminal 6-His tag
>95%, by SDS-PAGE visualized with Silver Staining and quantitative densitometry by Coomassie® Blue Staining.
<0.10 EU per 1 μg of the protein by the LAL method.
N-terminal sequence Analysis
Predicted Molecular Mass
34-38 kDa, reducing conditions
Measured by its ability to inhibit IL-22-induced IL-10 secretion by COLO 205 human colorectal adenocarcinoma cells. The ED50 for this effect is 1-4 µg/mL in the presence of 1 ng/mL of recombinant human IL-22.
Formulation, Preparation and Storage
What does CF mean?
CF stands for Carrier Free (CF). We typically add Bovine Serum Albumin (BSA) as a carrier protein to our
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
Lyophilized from a 0.2 μm filtered solution in PBS.
Reconstitute at 100 μg/mL in sterile PBS.
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.
Background: IL-22 R alpha 1
IL-22 receptor, also known as IL-22 R alpha 1 and CRF2-9, is an approximately 65 kDa transmembrane glycoprotein in the type II cytokine receptor family (CRF). IL-22 R alpha 1 contains a 211 amino acid (aa) extracellular domain (ECD) with two fibronectin type III repeats, and a 323 aa cytoplasmic domain. IL-22 R alpha 1 associates with either IL-10 R beta or IL-20 R beta to form receptor complexes with distinct ligand selectivities. IL-10 R beta is a shared subunit of the IL-10, -22, -26, -28, and -29 receptors, while IL-20 R beta is a shared subunit of the IL-19, -20, -22R and -24 receptors (1). IL-22 R alpha 1/IL-10 R beta is an IL-22 responsive receptor (2, 3), and IL-22 R alpha 1/IL-20 R beta is an IL-20 or IL-24 responsive receptor (4, 5). IL-22 R alpha 1 contains cytoplasmic motifs for interactions with signal transduction molecules, but formation of ternary complexes with IL-10 R beta or IL-20 R beta and the respective ligands is required for signal transduction (2, 6). IL-22BP functions as a competitive antagonist by binding IL-22 and preventing its association with IL-22 R alpha 1 (7, 9). Even though it is a receptor for interleukins, IL-22 R alpha 1 is not expressed on hematopoietic cells (6, 10, 11). Instead, IL-22 R alpha 1 expression is restricted to epithelial and stromal cells (6, 10 - 13). IL-22 R alpha 1 signaling promotes innate immune responses and wound healing at sites of infection and inflammation. This includes upregulation of antimicrobial, acute phase, proinflammatory, and extracellular matrix proteins as well as proteases (3, 11, 13, 14). IL-22 R alpha 1 signaling also promotes downregulation of proteins involved in keratinocyte differentiation (3, 14). Within the ECD, human IL-22 R alpha 1 shares 78%, 76%, and 83% aa sequence identity with mouse, rat, and canine IL-22 R, respectively. It shares 22% - 25% aa sequence identity with the ECDs of other class II receptors IL-10 R, IL-20 R, and IL-28 R.
Langer, J.A. et al. (2004) Cytokine Growth Factor Rev. 15:33.
Xie, M.-H. et al. (2000) J. Biol. Chem. 275:31335.
Boniface, K. et al. (2005) J. Immunol. 174:3695.
Dumoutier, L. et al. (2001) J. Immunol. 167:3545.
Wang, M. et al. (2002) J. Biol. Chem. 277:7341.
Kotenko, S.V. et al. (2001) J. Biol. Chem. 276:2725.
Li, J. et al. (2004) Int. Immunopharmacol. 4:693.
Logsdon, N.J. et al. (2002) J. Interferon Cytokine Res. 22:1099.
Kotenko, S.V. et al. (2001) J. Immunol. 166:7096.
Nagalakshmi, M.L. et al. (2004) Int. Immunopharmacol. 4:577.
Nagalakshmi, M.L. et al. (2004) Int. Immunopharmacol. 4:679.
Aggarwal, S. et al. (2001) J. Interferon Cytokine Res. 21:1047.
Customer Reviews for Recombinant Human IL-22 R alpha 1 Protein, CF (1)
4 out of 5
1 customer rating
Recombinant Human IL-22 R alpha 1 Protein, CF
Verified Customer | Posted
We used this protein in an in-house ELISA along with pAb (AF2770) and mAb (2770) to quantify IL-22R alpha1 in human serum and plasma. This combination could not detect IL-22R alpha1 in our samples but generated a good standard curve.
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