Recombinant Mouse IL-7 Protein Summary
Details of Functionality |
Measured in a cell proliferation assay using PHA-activated human peripheral blood lymphocytes (PBL). Yokota, T. et al. (1986) Proc. Natl. Acad. Sci. USA 83:5894. The ED 50 for this effect is 0.15-0.3 ng/mL. |
Source |
E. coli-derived mouse IL-7 protein Glu26-Ile154, with an N-terminal Met |
Accession # |
|
N-terminal Sequence |
Glu26 |
Protein/Peptide Type |
Recombinant Proteins |
Gene |
Il7 |
Purity |
>97%, by SDS-PAGE under reducing conditions and visualized by silver stain |
Endotoxin Note |
<0.01 EU per 1 μg of the protein by the LAL method. |
Applications/Dilutions
Dilutions |
|
Theoretical MW |
15 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 407-ML in the following applications:
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Packaging, Storage & Formulations
Storage |
Use a manual defrost freezer and avoid repeated freeze-thaw cycles. 12 months from date of receipt, -20 to -70 degreesC as supplied. 1 month, 2 to 8 degreesC under sterile conditions after reconstitution. 3 months, -20 to -70 degreesC under sterile conditions after reconstitution. |
Buffer |
Lyophilized from a 0.2 μm filtered solution in PBS with BSA as a carrier protein. |
Purity |
>97%, by SDS-PAGE under reducing conditions and visualized by silver stain |
Reconstitution Instructions |
Reconstitute at 50 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 Mouse IL-7 Protein
Background
IL-7 (interleukin-7) is a 25 kDa cytokine of the hemopoietin family that plays important roles in lymphocyte differentiation, proliferation, and survival (1-4). Mouse IL-7 cDNA encodes 154 amino acids (aa) that include a 25 aa signal peptide (4). Mouse IL-7 shares approximately 88% aa sequence identity with rat IL-7 and 58-60% with human, equine, bovine, ovine, porcine, feline and canine IL-7. Human and mouse IL-7 exhibit cross-species activity (2, 3). IL-7 is produced by a wide variety of cells in primary and secondary lymphoid tissues, including stromal epithelial cells of the thymus, bone marrow, and intestines (1, 2, 5). Circulating IL-7 is limiting in healthy animals, but increases during lymphopenia (1, 6). IL-7 signals through a complex of the IL-7 Receptor alpha subunit (IL-7 R alpha , also known as CD127) with the common gamma chain ( gamma c ) (1). The gamma c is also a subunit of the receptors for IL-2, -4, -9, -15, and -21 (1). IL-7 R alpha is expressed on double negative (CD4 - CD8 - ) and CD4 + or CD8 + single positive naïve and memory T cells, but undergoes IL-7-mediated down-regulation and shedding during antigen-driven T cell proliferation, and is absent on regulatory T cells (1, 2, 6-11). IL-7 contributes to the maintenance of all naïve and memory T cells, mainly by promoting expression of the anti-apoptotic protein Bcl-2 (9-11). It is required for optimal T cell-dendritic cell interaction (6). IL-7 is expressed early in B cell development prior to the appearance of surface IgM (1, 5, 9). In mouse, IL-7 activation of IL-7 R alpha is critical for both T cell and B cell lineage development, while in humans, it is required for T cell but not for B cell development (4, 9, 12, 13). However, IL-7 functions in both mouse and human pro-B cells to suppress premature Ig light chain recombination during proliferative growth (14, 15).
- Sasson, S.C. et al. (2006) Curr. Drug Targets 7:1571.
- Barata, J.T. et al. (2006) Exp. Hematol. 34:1133.
- Goodwin, R.G. et al. (1990) Proc. Natl. Acad. Sci. USA 86:302.
- Namen, A.E. et al. (1988) Nature 333:571.
- Shalapour, S. et al. (2012) PLoS ONE 7: e31939.
- Saini, M. et al. (2009) Blood 113:5793.
- Park, J.H. et al. (2004) Immunity 21:289.
- Vranjkovic, A. et al. (2007) Int. Immunol. 19:1329.
- Sudo, T. et al. (1993) Proc. Natl. Acad. Sci. 90:9125.
- Seddon, B. et al. (2003) Nat. Immunol. 4:680.
- Schluns, K.S. et al. (2000) Nat. Immunol. 5:426.
- Peschon, J.J. et al. (1994) J. Exp. Med. 180:1955.
- Pribyl, J.A. and T.W. LeBien (1996) Proc. Natl. Acad. Sci. 93:10348.
- Johnson, K. et al. (2012) J. Immunol. 188:6084.
- Nodland, S.E. et al. (2011) Blood 118:2116.
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