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IL-2 and IL-2 Receptor Proteins

IL-2 and IL-2 Receptor Proteins
Background

Interleukin-2 (IL-2) is a pluripotent cytokine which plays a crucial role in the immune system response. And the IL-2 receptor (IL-2R) is a heterotrimeric protein expressed on the surface of certain immune cells, such as lymphocytes, that binds and responds to IL-2.

IL-2R consists of three subunits, namely IL-2Rα (CD25), IL-2Rβ (CD122), and common γc (CD132). The three receptor chains are expressed separately and differently on various cell types and can assemble in different combinations and orders to generate low, intermediate, and high affinity IL-2 receptors.

Many biopharma and biotech companies have carried out different IL-2 modification and design, including PEG modification, fusion Fc, IL-2 mutant design, bispecific antibody design, and combined immunization checkpoint antibody drug therapy and other strategies.

Therefore, a series of structurally stable and high-affinity IL-2 receptor heterodimers and heterotrimers are of great significance for in vitro studies of the interaction between IL-2 and IL-2 receptors, and also for the antibody immunization and screening.

IL-2 has pleiotropic effects on the immune response

Fig.1 Native IL-2 has pleiotropic effects on the immune response[1]

IL-2 binding to the low-affinity, intermediate-affinity and high-affinity IL-2 receptors

Fig 2. Schematic of IL-2 binding to the low-affinity, intermediate-affinity and high-affinity IL-2 receptors. The high-affinity receptor comprises IL-2 receptor α-chain (IL-2Rα), IL-2Rβ and IL-2Rγ.[2]

ACROBiosystems has developed a series of IL-2 related proteins: IL-2, IL-2Rα (CD25), IL-2Rβ (CD122), IL-2Rγ (CD132), IL-2 R βγ heterodimer, IL-2Rαβγ heterotrimer with high purity, high stability and high bioactivity, which can be used to research the interaction between IL-2 and IL-2 receptors, immunization, antibody screening, etc., to facilitate the development of IL-2 related drugs. In addition, we can also provide GMP-grade IL-2 used for scale-up culturing of various cell types such as T/NK cells and iPSCs.

Features
Various species:Human, Mouse, Cynomolgus, Rat, Canine
Various tags:Fc, His, Fc & Avi, His & Strep, Tag Free
High purity:SDS-PAGE verification purity>95%, SEC-MALS verification purity>90%
High bioactivity verified by ELISA with free protocols
Affinity verified by SPR and BLI with free protocols
High stability:strict quality control to ensure high batch-to-batch consistency
Product list
  • IL-2
  • IL-2Rα
  • IL-2Rβ
  • IL-2Rγ
  • IL-2Rβγ
  • IL-2Rαβγ
Molecule Cat. No. Host Product Description Structure
Molecule Cat. No. Host Product Description Structure
Molecule Cat. No. Host Product Description Structure
Molecule Cat. No. Host Product Description Structure
Molecule Cat. No. Host Product Description Structure
Molecule Cat. No. Host Product Description Structure
more IL proteins
Assay data

Affinity verified by SPR

The SPR results of IL-2 binding to IL-2 receptors coincide with the reference[4]

Table 1 Affinity of IL-2 binding to IL-2R (SPR)

IL-2 R

IL-2 R αβγ

IL-2 R βγ

IL-2 R alpha

IL-2 R beta

Affinity to Human IL-2

40.6 pM

0.279 nM

29.9 nM

377 nM

Affinity validation data of IL-2 and IL-2 receptor protein (SPR)

Human IL-2RB&IL-2RA&IL-2RG, Fc Tag&Fc Tag (Cat. No. ILG-H5257) captured on CM5 chip via Anti-human IgG Fc antibodies surface can bind Human IL-2, Tag Free with an affinity constant of 40.6 pM as determined in a SPR assay (Biacore 8K) (Routinely tested).

Affinity validation data of IL-2 and IL-2 receptor protein (SPR)

Human IL-2RB&IL-2RG Heterodimer Protein, Fc Tag&Fc Tag (Cat. No. ILG-H5254) captured on CM5 chip via Anti-human IgG Fc antibodies surface can bind Human IL-2, Tag Free with an affinity constant of 0.279 nM as determined in a SPR assay (Biacore 8K) (Routinely tested).

Affinity validation data of IL-2 and IL-2 receptor protein (SPR)

Human IL-2 R alpha, His Tag (Cat. No. ILA-H52H9) captured on CM5 chip via anti-His antibody, can bind Human IL-2, Tag Free with an affinity constant of 29.9 nM as determined in a SPR assay (Biacore T200) (Routinely tested).

Affinity validation data of IL-2 and IL-2 receptor protein (SPR)

Cynomolgus IL-2 R beta, His Tag (Cat. No. ILB-C52H9) immobilized on CM5 Chip can bind Cynomolgus IL-2, His Tag (Cat. No. IL2-C5249) with an affinity constant of 377 nM as determined in a SPR assay (Biacore 8K) (Routinely tested).

High purity heteropolymer verified by MALS

IL-2RB&IL-2RG Heterodimer Protein (MALS)

The purity of Human IL-2RB&IL-2RG Heterodimer Protein, Fc Tag&Fc Tag (MALS verified)(Cat. No. ILG-H5254) is more than 90% and the molecular weight of this protein is around 145-165 kDa verified by SEC-MALS.

IL-2RB&IL-2RA&IL-2RG Heterotrimer Protein (MALS)

The purity of Human IL-2RB&IL-2RA&IL-2RG, Fc Tag&Fc Tag(Cat. No. ILG-H5257) is more than 90% and the molecular weight of this protein is around 175-190 kDa verified by SEC-MALS.

High bioactivity verified by ELISA

Binding validation data of IL-2 and IL-2 receptor protein (ELISA)

Immobilized Biotinylated Human IL-2, His,Avitag (Cat. No. IL2-H82E4) at 1 μg/mL (100 μL/well) on streptavidin precoated (0.5 μg/well) plate can bind Human IL-2RB&IL-2RA&IL-2RG, Fc Tag&Fc Tag (Cat. No. ILG-H5257) with a linear range of 0.4-6 ng/mL (QC tested).

Binding validation data of IL-2 and IL-2 receptor protein (ELISA)

Immobilized Biotinylated Human IL-2, His,Avitag (Cat. No. IL2-H82E4) at 1 μg/mL (100 μL/well) on streptavidin precoated (0.5 μg/well) plate can bind Human IL-2RB&IL-2RA&IL-2RG, Fc Tag&Fc Tag (Cat. No. ILG-H5257) with a linear range of 0.4-6 ng/mL.

Reference:

1. NKTR-2017JPMorganSlides

2. Spolski R, et al. Nat Rev Immunol. 2018. PMID: 30089912 Review.

3. Xinquan Wang et al.,2005, Science. 310(5751):1159-63.

4. Balasubramanian, S. Int Immunol. 1995 Nov;7(11):1839-49.

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