Recombinant Human IL-31 Protein

Carrier Free

Catalog # Availability Size / Price Qty
2824-IL-010/CF

With Carrier

Catalog # Availability Size / Price Qty
2824-IL-010
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Product Details
Citations (3)
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Recombinant Human IL-31 Protein Summary

Product Specifications

Purity
>95%, by SDS-PAGE visualized with Silver Staining and quantitative densitometry by Coomassie® Blue Staining.
Endotoxin Level
<1.0 EU per 1 μg of the protein by the LAL method.
Activity
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
Analysis
Ser24
Predicted Molecular Mass
15.8 kDa

Product Datasheets

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2824-IL (with carrier)

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2824-IL/CF (carrier free)

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.

2824-IL

Formulation Lyophilized from a 0.2 μm filtered solution in PBS with BSA as a carrier protein.
Reconstitution Reconstitute at 10 μg/mL in sterile PBS containing at least 0.1% human or bovine serum albumin.
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.

2824-IL/CF

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.
Reconstitution Calculator

Reconstitution Calculator

The reconstitution calculator allows you to quickly calculate the volume of a reagent to reconstitute your vial. Simply enter the mass of reagent and the target concentration and the calculator will determine the rest.

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Background: IL-31

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).

References
  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.
Long Name
Interleukin 31
Entrez Gene IDs
386653 (Human); 76399 (Mouse)
Alternate Names
IL31; IL-31; IL-31interleukin-31; interleukin 31

Citations for Recombinant Human IL-31 Protein

R&D Systems personnel manually curate a database that contains references using R&D Systems products. The data collected includes not only links to publications in PubMed, but also provides information about sample types, species, and experimental conditions.

3 Citations: Showing 1 - 3
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  1. miRNA551b-3p Activates an Oncostatin Signaling Module for the Progression of Triple-Negative Breast Cancer
    Authors: D Parashar, A Geethadevi, MR Aure, J Mishra, J George, C Chen, MK Mishra, A Tahiri, W Zhao, B Nair, Y Lu, LS Mangala, C Rodriguez-, G Lopez-Bere, AKS Camara, M Liang, JS Rader, R Ramchandra, M You, AK Sood, VN Kristensen, GB Mills, S Pradeep, P Chaluvally
    Cell Rep, 2019-12-24;29(13):4389-4406.e10.
    Species: Human
    Sample Types: Whole Cells
    Applications: Cell Culture
  2. Regulation of IL-17A responses in human airway smooth muscle cells by Oncostatin M.
    Authors: Kwofie K, Scott M, Rodrigues R, Guerette J, Radford K, Nair P, Richards C
    Respir Res, 2015-02-07;16(0):14.
    Species: Human
    Sample Types: Whole Cells
    Applications: Bioassay
  3. Interleukin 31 mediates MAP kinase and STAT1/3 activation in intestinal epithelial cells and its expression is upregulated in inflammatory bowel disease.
    Authors: Dambacher J, Beigel F, Seiderer J, Haller D, Goke B, Auernhammer CJ, Brand S
    Gut, 2007-04-20;56(9):1257-65.
    Species: Human
    Sample Types: Whole Cells
    Applications: Bioassay

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