Recombinant Human IL-22 (ELISA Std.)

Pricing & Availability
Regulatory Status
RUO
Other Names
TIFa, IL-D110, IL-TIF, TIFIL-23, zcyto18
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Description

IL-22 is a cytokine structurally related to IL-10. Originally identified as a murine gene induced by IL-9 in T and mast cells, IL-22 was initially designated ILTIF (IL-10-related T cell-derived inducible factor).   IL-22 belongs to a family of cytokines with limited homology to IL-10, namely IL-10, IL-19, IL-20, IL-24, IL-26, and the IFN-λs, IL-28A, IL-28B and IL-29.  Human IL-22 shares 79% amino acid identity with murine IL-22 and 25% identity with human IL-10. IL-22 biological activity is initiated by binding to a cell surface complex composed of IL-22R1 and IL-10R2 receptor chains. Activity is further regulated through interactions with the soluble binding protein, IL-22BP, which shares sequence similarity with an extracellular region of IL-22R1 (sIL-22R1).  Both chains of the IL-22R complex belong to the class II CRF. Two types of IL-22 binding receptors have been discovered, a membrane-bound receptor and a soluble receptor, both encoded by different genes. IL-22 is produced by Th17 cells and newly identified Th22 cells. It plays a critical role in mucosal immunity in addition to the deregulated inflammation observed in autoimmune diseases.

Product Details
Technical Data Sheet (pdf)

Product Details

Source
Human IL-22, amino acids Ala34-Ile179 (Accession# NM_020525) was expressed in E. coli.
Molecular Mass
The 147 amino acid N-terminal methionylated recombinant protein has a predicted molecular mass of 16.88 kD. The DTT-reduced protein migrates at approximately 15 kD and the non-reduced protein migrates at approximately 14 kD by SDS-PAGE.
Purity
Purity is >98%, as determined by Coomassie stained SDS-PAGE.
Formulation
Lyophilized in sterile-filtered PBS, pH 7.2, containing 1% BSA, and protease inhibitors.
Endotoxin Level
Endotoxin level is <0.1 EU/µg (<0.01 ng/µg) protein as determined by the LAL method.
Concentration
Lot-specific (please contact technical support for mass/vial, or use our Lookup tool if you have a lot number.)
Storage & Handling
Upon receipt, store unopened vials between 2°C and 8°C immediately and use within 12 months from date of receipt. Prior to use, reconstitute the lyophilized powder with 0.2 ml of PBS containing a carrier protein (e.g., 1% BSA, protease free), pH 7.4. Re-cap vial, vortex. Allow the reconstituted standard to sit at room temperature for 15 minutes, vortex again to mix completely. The reconstituted standard stock solution can be aliquoted into polypropylene vials and stored at -70°C for up to one month. Do not re-use diluted standards. Use a manual defrost freezer and avoid repeated freeze thaw cycles.
Application

ELISA - Quality tested

Recommended Usage

Each lot of this protein is quality control tested by ELISA assay. For use as an ELISA standard, a standard curve comprised of doubling dilutions from 8000 pg/ml to 125 pg/ml is suggested. It is recommended that the reagent be titrated for optimal performance for each application.

Application Notes

This IL-22 protein is useful as a standard in a human IL-22 sandwich ELISA, using unlabeled poly5161 antibody (Cat. No. 516101) for capture and biotinylated poly5161 antibody (Cat. No. 516103) for detection.

Antigen Details

Structure
Cytokine
Distribution

Thymic lymphomas, T cells, activated T cells, macrophages, and mast cells

Function
Enhances the production of acute phase proteins in a hepatocyte cell line, HepG2; Promotes Th17 cells to transmigrate through the blood-brain barrier in multiple sclerosis
Interaction
Interacts with a cell surface complex composed of IL-22R1 and IL-10R2 receptor chains which are expressed in epithelial cells of inflammatory diseases such as psoriasis, Crohn's disease, rheumatoid arthritis, or allergic asthma
Ligand/Receptor
IL-22R1 and IL-10R2 receptor chains
Bioactivity
IL-22 bioactivity was measured by its ability to induce IL-10 in human Colo205 cells
Biology Area
Stem Cells, Immunology, Cell Biology
Molecular Family
Cytokines/Chemokines
Antigen References

1. Nagalakshmi ML, et al. 2004. Intern. Immunopharmacol. 4:679.
2. Kebir H, et al. 2007. Nat. Med. 13:1173.
3. Gu Y, et al. 2008. Eur. J. Immunol. 38:1807.
4. Pene J, et al. 2008. J. Immunol. 180:7423.
5. Dumoutier L, et al. 2000. J. Immunol. 164:1814.
6. Xie MH, et al. 2000. J. Biol. Chem. 265:31335.
7. Kotenko SV, et al. 2001. J. Immunol. 166:7096.
8. Chung Y, et al. 2006. Cell Res. 16:902.
9. Trifari S, et al. 2009. Nat. Immunol. 10:864.

Gene ID
50616 View all products for this Gene ID
UniProt
View information about IL-22 on UniProt.org

Related FAQs

There are no FAQs for this product.
Go To Top Version: 1    Revision Date: 11/30/2012

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