| Catalog# |
C033 |
| Source |
E.coli |
| Description |
Recombinant Human Interleukin-1 Receptor Antagonist Protein/IL-1RN produced in E. coli is a non-glycosylated N-terminal methionyl form of the naturally occurring polypeptide chain containing 153 amino acids with a molecular mass of 17,258 Daltons. |
| Names |
Interleukin-1 Receptor Antagonist Protein, IL-1RN, IL-1ra, IRAP, ICIL-1RA, IL1 Inhibitor, Anakinra, IL1RN, IL1F3, IL1RA |
| Accession # |
P18510 |
| Formulation |
Lyophilized from a 0.2 μm filtered solution of 50mM Tris-HCl, 200mM NaCl, pH 7.5 |
| Shipping |
The product is shipped at ambient temperature. |
| Reconstitution |
Always centrifuge tubes before opening. Do not mix by vortex or pipetting.
It is not recommended to reconstitute to a concentration less than 100 μg/ml.
Dissolve the lyophilized protein in 1X PBS.
Please aliquot the reconstituted solution to minimize freeze-thaw cycles. |
| Storage |
Lyophilized protein should be stored at < -20°C, though stable at room temperature for 3 weeks.
Reconstituted protein solution can be stored at 4-7°C for 2-7 days.
Aliquots of reconstituted samples are stable at < -20°C for 3 months. |
| Biological Activity |
ED50 is 0.5 ng/ml as determined by the dose-dependent inhibition of IL-1 stimulation of D10S cells.
Specific Activity of 2.0 x 106 IU/mg. |
| Purity |
Greater than 95% as determined by RP-HPLC and reducing SDS-PAGE. |
| Endotoxin |
Less than 0.1 ng/μg (1 IEU/μg). |
| Amino Acid Sequence |
MRPSGRKSSKMQAFRIWDVNQKTFYLRNNQLVAGYLQGPNVNLEEKIDVVPIEPHALFLGIHGGK MCLSCVKSGDETRLQLEAVNITDLSENRKQDKRFAFIRSDSGPTTSFESAACPGWFLCTAMEADQ PVSLTNMPDEGVMVTKFYFQEDE
|
| Background |
Interleukin-1 Receptor Antagonist (IL-1RN) is a member of the IL-1 family. Endogenous IL-1RN is produced in numerous animal disease models as well as in human autoimmune and chronic inflammatory diseases. It binds to IL-1 receptors in competition with IL-1, but does not elicit intracellular response from this binding. Its role in counteracting the proinflammatory effects of IL-1 is being studied by numerous research groups. IL-4 and IL-13 have been shown to amplify the stimulatory effect of IL1-beta on the production of soluble and intracellular forms of IL-1RN. The regulated expression of IL-1RN in various cell types has been shown to be influenced by cytokines. In synovial fibroblasts, IL-1, TNF-alpha, or PDGF markedly enhances the synthesis of IL-1RN. |
