Reactivity | HuSpecies Glossary |
Applications | Bioactivity |
Details of Functionality | Measured by its ability to inhibit IL-1 alpha -dependent proliferation in D10.G4.1 mouse helper T cells. Symons, J.A. et al. (1987) in Lymphokines and Interferons, a Practical Approach. Clemens, M.J. et al. (eds): IRL Press. 272. The ED50 for this effect is 5-40 ng/mL in the presence of 50 pg/mL of rhIL-1 alpha . |
Source | E. coli-derived human IL-1ra/IL-1F3 protein |
Accession # | |
Protein/Peptide Type | Recombinant Proteins |
Gene | IL1RN |
Purity | >97%, by SDS-PAGE under reducing conditions and visualized by silver stain. |
Endotoxin Note | <0.10 EU per 1 μg of the protein by the LAL method. |
Dilutions |
|
|
Theoretical MW | 17 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 |
|
Storage | Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
|
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 100 μg/mL in sterile PBS containing at least 0.1% human or bovine serum albumin. |
IL-1ra was originally isolated from the urine of patients with monocytic leukemia and has also been purified from adherent monocytes. The naturally occurring, fully glycosylated form has an apparent molecular weight of about 25,000 Daltons. The protein shows 26% amino acid homology to IL-1 beta and 19% homology to IL-1 alpha . It will compete with either factor for receptor binding, but does not interact with either one. Human IL-1ra will bind to both types of IL-1 receptor (I and II) on human cells, but reportedly will not block binding to the type II receptor on murine pre-B cell lines. The recombinant, non-glycosylated form of IL-1ra blocks binding of IL-1 to its receptor equally as well as the naturally-occurring, glycosylated form. The IL-1ra has been shown to block the inflammatory responses induced by IL-1 both in vitro and in vivo. Currently, pre-clinical and clinical studies are underway to test possible therapeutic applications for IL-1ra in the treatment of sepsis, rheumatoid arthritis and chronic myelogenous leukemia.
The concentration calculator allows you to quickly calculate the volume, mass or concentration of your vial. Simply enter your mass, volume, or concentration values for your reagent and the calculator will determine the rest.