1. 重组蛋白
  2. Cytokines and Growth Factors
  3. Interferon & Receptors
  4. IFN-α/β Receptor
  5. IFN-alpha/beta R2
  6. IFN-alpha/beta R2 蛋白, Human (HEK293, hFc)

IFN-alpha/beta R2 蛋白, Human (HEK293, hFc)

目录号: HY-P74860
产品使用指南

IFN-alpha/beta R2,IFN-α/β 受体的亚基之一,是 I 型 IFN 受体。IFNAR1 可与 IFNAR2 形成异二聚体受体并与 type I 型 IFNs 结合。IFN-alpha/beta R2 也可与 JAK1 相互作用并导致 IFNAR 和 STAT 蛋白的酪氨酸磷酸化。在被这些 IFN 激活后,IFNAR1 和 IFN-alpha/beta R2 会发生构象变化以促进下游信号事件级联反应的发生,包括 Tyk2 和 JAK1、STAT1 和 STAT2 的磷酸化。IFNAR1 蛋白, Human (HEK293, Fc) 是一种由 HEK293 细胞产生的重组人 IFN-alpha/beta R2 (M1-K243),C 端带有 hFc 标签。

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描述

IFN-alpha/beta R2, one of the subunit of IFN-α/β receptor, is a type I IFN receptor. IFN-alpha/beta R2 forms the heterodimeric receptor with IFNAR1, and binds to type I IFNs[1]. IFN-alpha/beta R2 also interacts with JAK1 and leads to tyrosine phosphorylation of the IFNARs and STAT proteins[2]. Upon activation by these IFNs, IFNAR1 and IFN-alpha/beta R2 undergo a conformational change to promote a cascade of downstream signaling events, including the phosphorylation of Tyk2 and JAK1, STAT1 and STAT2[3]. IFN-alpha/beta R2 Protein, Human (HEK293, hFc) is a recombinant human IFN-alpha/beta R2 (M1-K243) with C-terminal hFc tag, which is produced in HEK293 cells.

研究背景

IFN-alpha/beta R2, one of the subunit of IFN-α/β receptor, is a type I IFN receptor. IFN-alpha/beta R2 is expressed on peripheral blood B cells and monocytes, and mediates differentiation and activation of these cells[4].
IFN-alpha/beta R2 forms the heterodimeric receptor (IFN-α/β receptor) together with IFNAR1. IFNs such as IFN-α/-β can induce association of the IFNAR1 and IFN-alpha/beta R2, which makes JAK1 and TYK2 form a functional signaling unit[1]. Upon activation by these IFNs, IFNAR1 and IFN-alpha/beta R2 undergo a conformational change to promote a cascade of downstream signaling events. The signaling events includes the phosphorylation of Tyk2 and JAK1, the signal transducers and activators of transcription STAT1 and STAT2, and the formation of the IFN-stimulated gene factor 3 (ISGF3) complex which consists of phosphorylated STAT1 and STAT2 and IRF9[3]. IFNAR2 is critical for anti-viral immunity[5].
Human IFN-alpha/beta R2 consists of extracellular domain (I27-K243), helical domain (I244-L264), and cytoplasmic domain (K265-R515). The sequence of amino acids in IFN-alpha/beta R2 differs in different species. Human IFN-alpha/beta R2 shares <50% aa sequence identity with mouse.
IFN-alpha/beta R2 mediates IFN-induced tyrosine phosphorylation of the IFNARs and STAT proteins, and activates the JAK-STAT signaling cascade[1]

体外研究
(In Vitro)

IFN-alpha/beta R2 (human, 30 μg/mL, 4 h) down-regulates the production of IL-17 and IFN-γ in PBMCs[6].
IFN-alpha/beta R2 (human, 100 ng/mL, 40 h) reduces the cell proliferation rate in PBMCs[6].

生物活性

Measured by its ability to inhibit rh IFNβ mediated protection of WISH Human amnion cells infected with vesicular stomatitis virus (VSV) to viral lysis and the EC50 for this effect is typically 0.2-1.2 μg/mL.

种属

Human

表达系统

HEK293

标签

C-hFc

蛋白编号

P48551 (M1-K243)

基因 ID
中文名
重组人 IFN-alpha/beta R2 蛋白 (HEK293, hFc)
同用名
Interferon alpha/beta receptor 2; IFN-R-2; Interferon alpha binding protein; IFNAR2; IFNABR; IFNARB
分子量

65-75 kDa

纯度

Greater than 90% as determined by reducing SDS-PAGE.

性状

Lyophilized powder.

组分

Lyophilized a 0.2 μm filtered solution of PBS, pH 7.4.

内毒素含量

<1 EU/μg, determined by LAL method.

复溶方法

It is not recommended to reconstitute to a concentration less than 100 μg/mL in ddH2O. For long term storage it is recommended to add a carrier protein (0.1% BSA, 5% HSA, 10% FBS or 5% Trehalose).

保存条件 & 期限

Stored at -20°C. After reconstitution, it is stable at 4°C for 1 week or -20°C for longer. It is recommended to freeze aliquots at -20°C or -80°C for extended storage.

运输条件

Room temperature in continental US; may vary elsewhere.

文件资料
参考文献

IFN-alpha/beta R2 Protein, Human (HEK293, hFc) 相关分类

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.

  • 复溶计算器

  • 重组蛋白稀释计算器

  • 比活力计算器

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

浓度 (start) × 体积 (start) = 浓度 (final) × 体积 (final)
× = ×
C1   V1   C2   V2

The specific active calculator equation

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

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

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