Recombinant Human IL-31 Protein

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Product Details

Summary
Reactivity HuSpecies Glossary
Applications Bioactivity

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Recombinant Human IL-31 Protein Summary

Details of Functionality
Measured by its ability to induce STAT3 activation in U‑87 MG human glioblastoma/astrocytoma cells. 5 ng/mL of Recombinant Human IL-31 can effectively induce STAT3 activation.
Source
E. coli-derived human IL-31 protein
Ser24-Thr164
Accession #
N-terminal Sequence
Ser24
Protein/Peptide Type
Recombinant Proteins
Gene
IL31
Purity
>95%, by SDS-PAGE visualized with Silver Staining and quantitative densitometry by Coomassie® Blue Staining.
Endotoxin Note
<1.0 EU per 1 μg of the protein by the LAL method.

Applications/Dilutions

Theoretical MW
15.8 kDa.
Disclaimer note: The observed molecular weight of the protein may vary from the listed predicted molecular weight due to post translational modifications, post translation cleavages, relative charges, and other experimental factors.
Publications
Read Publications using
2824-IL in the following applications:

Packaging, Storage & Formulations

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.
Buffer
Lyophilized from a 0.2 μm filtered solution in PBS with BSA as a carrier protein.
Purity
>95%, by SDS-PAGE visualized with Silver Staining and quantitative densitometry by Coomassie® Blue Staining.
Reconstitution Instructions
Reconstitute at 10 μg/mL in sterile PBS containing at least 0.1% human or bovine serum albumin.

Notes

This product is produced by and ships from R&D Systems, Inc., a Bio-Techne brand.

Alternate Names for Recombinant Human IL-31 Protein

  • IL31
  • IL-31
  • IL-31interleukin-31
  • interleukin 31

Background

Human Interleukin-31 (IL-31) is a 24 kDa, short-chain member of the alpha -helical family of cytokines. The human IL-31 cDNA encodes a 164 amino acid (aa) precursor that contains a 23 aa signal peptide and a 141 aa mature protein (1, 2). The mature region shows four alpha -helices which would be expected to show a typical up‑up‑down‑down topology. Human and mouse IL-31 share 24% aa sequence identity in the mature region (1). IL-31 is mainly associated with activated T cells and preferentially expressed by Th2 rather than Th1 cells. IL-31 signals via a heterodimeric receptor complex composed of a 120 kDa, gp130-related molecule termed IL‑31 RA (also GPL and GLM-R) and the 180 kDa oncostatin M receptor (OSM R beta ) (2-6). In the complex, IL-31 directly binds to GPL, not OSM R (2, 3). IL-31 signaling has been shown to involve the Jak/STAT pathway, the PI3 kinase/AKT cascade, and the MAP kinase pathway (2-5). Although multiple isoforms of IL-31 RA are known, only a form that contains the entire length of the cytoplasmic domain is signaling-capable (2, 3). The IL-31 receptor is constitutively expressed by keratinocytes and up‑regulated by IFN-gamma on monocytes (1). Studies using transgenic mice indicate that IL-31 may contribute to the pruritis (itching) associated with nonatopic dermatitis (1, 7).

  1. Dillon, S.R. et al. (2004) Nat. Immunol. 5:752.
  2. Diveu, C. et al. (2004) Eur. Cytokine Netw. 15:291.
  3. Dreuw, A. et al. (2004) J. Biol. Chem. 279:36112.
  4. Diveu, C. et al. (2003) J. Biol. Chem. 278:49850.
  5. Ghilardi, N. et al. (2002) J. Biol. Chem 277:16831.
  6. Mosley, B. et al. (1996) J. Biol. Chem. 271:32635.
  7. Takaoka, A. et al. (2005) Eur. J. Pharmacol. 516:180.

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Publications for IL-31 (2824-IL)(2)

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Bioinformatics

Gene Symbol IL31
Uniprot