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Recombinant Human IL2Ra/CD25 Protein (His Tag)(Active)
SKU: PKSH031814-100
Recombinant Human IL2Ra/CD25 Protein (His Tag)(Active)
| SKU # | PKSH031814 |
| Expression Host | HEK293 Cells |
Description
| Synonyms | IMD, IDDM, IL2RA, CD25, IDDM10, IL2R, IMD41, TCGFR, p55, IL-2 receptor subunit alpha, IL-2R subunit alpha, IL2-RA, IL-2-RA, IL-2Rα, Interleukin-2 receptor subunit alpha, TAC antigen, Tac, p55, IL-2R&, alpha, alpha chain, CD25 antigen, IL 2 receptor alpha subunit, IL2 RA, Interleukin 2 receptor, Interleukin 2 receptor alpha, Interleukin 2 receptor alpha chain, t-cell growth factor receptor |
| Species | Human |
| Expression Host | HEK293 Cells |
| Sequence | Met 1-Cys 213 |
| Accession | NP_000408.1 |
| Calculated Molecular Weight | 23.3 kDa |
| Observed Molecular Weight | 44 kDa |
| Tag | C-His |
| Bio-activity | 1. Using the Octet RED System, the affinity constant (Kd) of Human IL2RA-his bound to Human IL2 was 35nM. 2. Measured by its ability to inhibit IL2-dependent proliferation of MO7e human megakaryocytic leukemic cells in the presence of 30 ng/mL of recombinant human IL-2. The ED50 for this effect is 0.15-0.75μg/mL. |
Properties
| Purity | > 97 % as determined by reducing SDS-PAGE. |
| Endotoxin | < 1.0 EU per μg of the protein as determined by the LAL method. |
| Storage | Generally, lyophilized proteins are stable for up to 12 months when stored at -20 to -80℃. Reconstituted protein solution can be stored at 4-8℃ for 2-7 days. Aliquots of reconstituted samples are stable at < -20℃ for 3 months. |
| Shipping | This product is provided as lyophilized powder which is shipped with ice packs. |
| Formulation | Lyophilized from sterile PBS, pH 7.4 Normally 5% - 8% trehalose, mannitol and 0.01% Tween 80 are added as protectants before lyophilization. Please refer to the specific buffer information in the printed manual. |
| Reconstitution | Please refer to the printed manual for detailed information. |
Background
CD25 (alpha-chain of IL-2 receptor, or IL2RA), is a type I transmembrane glycoprotein with a signal peptide, an extracellular region, a transmembrane region, and a cytoplasmic domain. IL2RA is expressed on activated T cells and regulatory T cells, and is capable of binding IL2 with low affinity by itself. However, a ligand-induced high affinity heterotrimeric receptor complex is produced when IL2RA is associated non-covelently with the IL2 receptor beta and gamma chain, and subsequently initiates the intacellular signal pathways such as MAPK or JAK/STAT. On dendritic cells (DC), CD25 has been previously regarded as an activation marker, while both murine and human DC can express CD25, they do not express the beta-chain of the IL-2 receptor, which is indispensable for the execution of IL-2 signaling. The IL2RA (CD25) gene is a substantial component of the high-affinity receptor molecule highly expressed by activated T lymphocytes. Recently, a strong evidence was obtained for the involvement of IL-2RA in conferring susceptibility to type 1 diabetes (T1D). Cancer growth and development is associated with the stimulation of the innate immune system, including enhanced interleukin 2 receptor (IL-2R) expression in immune cells and its shedding into the circulation in a soluble form of sIL-2Ralpha. In most haematological malignancies, including different types of leukaemias and lymphomas, sIL-2Ralpha has been found to be released directly from the surface of neoplastic cells thus reflecting the tumour bulk, turnover and activity.