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  5. IL-2R beta
  6. IL-2R beta/CD122 Protein, Human (HEK293, His-Avi)

IL-2R beta/CD122 Protein, Human (HEK293, His-Avi)

Cat. No.: HY-P77594
COA Handling Instructions

IL-2R beta (CD122), a type Ⅰ cytokine receptor expressed on T lymphocytes, is a receptor for IL-2 (Kd: 1 nM approximately). IL-2R beta mediates T cell immune responses, such as stimulating T cell proliferation and activating lymphokine-activated killer cells. IL-2R beta/CD122 Protein, Human (HEK293, His-Avi) is a recombinant human extracellular region of IL-2R beta (A27-D239) with a C-Terminal His-Avi tag, which is produced in HEK293 cells.

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Description

IL-2R beta (CD122), a type Ⅰ cytokine receptor expressed on T lymphocytes, is a receptor for IL-2 (Kd: 1 nM approximately)[1]. IL-2R beta mediates T cell immune responses, such as stimulating T cell proliferation and activating lymphokine-activated killer cells[2]. IL-2R beta/CD122 Protein, Human (HEK293, His-Avi) is a recombinant human extracellular region of IL-2R beta (A27-D239) with a C-Terminal His-Avi tag, which is produced in HEK293 cells.

Background

IL-2R beta (CD122) is a type I cytokine receptor, and belongs to Type 4 subfamily. IL-2R beta is also a key component of the IL-15 receptor. IL-2R beta is broadly expressed in spleen, blood, and lymph node, such as B and T lymphocytes[1][3].
The sequence of amino acids in IL-2R beta differs in different species. Human IL-2R beta shares <60% aa sequence identity with mouse and rats.
IL-2R beta cytoplasmic domain heterodimerizes with IL-2 and leads to the activation of signaling pathways: phosphoinositol 3-kinase (PI3-K)/AKT, Ras-MAP kinase, and the JAK-STAT pathways[4]. IL-2R beta binds IL-2 with intermediate affinity. IL-2R beta mediates IL-2 internalization and signal transduction, such as cell proliferation or differentiation[5]. IL-2R beta interacts with IL-2 and increases the proportion of CD4+ T lymphocytes[1]. IL-2R stimulates T cell proliferation and activating lymphokine-activated killer cells[2].
IL-2R beta mediates T cell immune responses, and also mediates endocytosis, as well as transducing the mitogenic signals of IL-2.

Biological Activity

Human IL-2 R beta, His Tag captured on CM5 Chip via anti-his antibody can bind Human IL-2, No Tag with an affinity constant of 0.12-0.25 μM as determined in SPR assay (Biacore T200).

Species

Human

Source

HEK293

Tag

C-Avi;C-His

Accession

P14784 (A27-D239)

Gene ID
Molecular Construction
N-term
IL-2Rβ (A27-D239)
Accession # P14784
His-Avi
C-term
Synonyms
CD122; IL-15 R beta; IL-2 R beta; IL-2R subunit beta; IL2RB; P70-75; p75; RP5-1170K4.6
Molecular Weight

40-50 kDa

Purity

Greater than 95% as determined by Tris-Bis PAGE.

Appearance

Lyophilized powder.

Formulation

Lyophilized from a 0.22 μm filtered solution of PBS, pH 7.4. Normally 5% trehalose is added as protectant before lyophilization.

Endotoxin Level

<1 EU/μg, determined by LAL method.

Reconstitution

It is not recommended to reconstitute to a concentration less than 100 μg/mL in ddH2O.

Storage & Stability

Stored at -20°C for 2 years. After reconstitution, it is stable at 4°C for 1 week or -20°C for longer (with carrier protein). It is recommended to freeze aliquots at -20°C or -80°C for extended storage.

Shipping

Room temperature in continental US; may vary elsewhere.

Documentation
References
Help & FAQs
  • Do most proteins show cross-species activity?

    Species cross-reactivity must be investigated individually for each product. Many human cytokines will produce a nice response in mouse cell lines, and many mouse proteins will show activity on human cells. Other proteins may have a lower specific activity when used in the opposite species.

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The reconstitution calculator equation

Volume (to add to vial) = Mass (in vial) ÷ Desired Reconstitution Concentration

Volume (to add to vial) = Mass (in vial) ÷ Desired Reconstitution Concentration
= ÷

The dilution calculator equation

Concentration (start) × Volume (start) = Concentration (final) × Volume (final)

This equation is commonly abbreviated as: C1V1 = C2V2

Concentration (start) × Volume (start) = Concentration (final) × Volume (final)
× = ×
C1   V1   C2   V2

The specific activity calculator equation

Specific Activity (Unit/mg) = 106 ÷ Biological Activity (ED50)

Specific Activity (Unit/mg) = 106 ÷ Biological Activity (ED50)
Unit/mg = 106 ÷ ng/mL

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Product Name:
IL-2R beta/CD122 Protein, Human (HEK293, His-Avi)
Cat. No.:
HY-P77594
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