Recombinant Human IL2Ra/CD25 Protein (His Tag)

Specifications

Catalog number

PKSH031814-01

Size / count

100 µg

Dry ice

No

Hazardous

No

Discontinued

No

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.

Abbreviation

IL2Ra/CD25

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-2Rα 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

UniProt

P01589

Accession Number

NP_000408.1

Expression System

HEK293 Cells

Tag

C-His

Sequence

Met 1-Cys 213

Applications

Cell culture; BLI

Field of Research

Immunology

Endotoxin

< 1.0 EU per μg of the protein as determined by the LAL method.

Purity

> 97 % as determined by reducing SDS-PAGE.

Bioactivity

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.

Reconstitution

Please refer to the printed manual for detailed information.

Shipping Conditions

This product is provided as lyophilized powder which is shipped with ice packs.

Storage Conditions

Generally, lyophilized proteins are stable for up to 12 months when stored at -20 to -80°C. Reconstituted protein solution can be stored at 4-8°C for 2-7 days. Aliquots of reconstituted samples are stable at < -20°C for 3 months.

Calculated Molecular Weight

23.3 kDa

Observed Molecular Weight

44 kDa

Species

Human