IL-4R alpha/CD124 蛋白, Mouse (HEK293, Fc)

IL-4R alpha is a subunit alpha shared by IL-4 and IL-13 receptors, found in leukocytes originally. IL-4R alpha couples to the JAK1/2/3-STAT6 pathway and involves in promoting Th2 differentiation. IL-4R alpha/CD124, exerts IL-4 binding function and results the phosphorylation of C-terminal tyrosine residues. IL-4R alpha/CD124, Mouse has an immunoreceptor tyrosine inhibitor motif (ITIM) (707-712 a.a), which can bind to the SH2 domain of some phosphatases by phosphorylating ITIM. IL-4R alpha/CD124 Protein, Mouse (HEK293, Fc) has a transmembrane domain (234-257 a.a). IL-4R alpha/CD124 Protein, Mouse is produced in HEK293 cells, including a Fibronectin typr III domain and a C-terminal hFC-tag.

白介素 4R α (IL-4Rα) 也称为 CD124 和 B 细胞刺激因子 (BSF) 受体，是一种抗炎细胞因子，在活化的 T 细胞中高表达^[1]。
IL-4R α 参与不同细胞类型中两种白细胞介素受体的形成。对于I型受体，依赖于IL-4Rα结合IL-4来招募免疫细胞中的IL-2Rγ链。IL-2R γ 是多种白细胞介素受体的常见亚基，参与 IL-15 刺激中性粒细胞的吞噬作用。对于II型受体，依赖IL-4Rα结合IL-4来募集IL-13Rα1链。IL-13R α 1 是非免疫细胞中常见细胞因子受体 γ 链的替代辅助蛋白^[2][3]。
小鼠 IL-4R α 蛋白中的氨基酸与人类 (52.82%) 和大鼠 (53.35%) 的同源性较低。
需要补上 IL-4 R α 通过交替剪接或蛋白水解生成可溶形式，维持配体结合特性并抑制 IL-4 生物活性。IL-4 R α 可溶性亚型 1 可以通过金属蛋白酶在细胞表面进行蛋白水解裂解（脱落）来产生^[4]。
IL-4 R α 在 Th2 中发挥重要作用- 免疫反应偏向、巨噬细胞活化、粘膜免疫、过敏性炎症、肿瘤进展和动脉粥样硬化^[5]。

IL-4 R alpha plays a key role in the control of RSV-induced lung injury by alternatively activated macrophages, and induces AA-Mφ differentiation^[6].
IL-4 R alpha deficiency, in IL-4R alpha^-/- RSV infected mice model, leads to strong inflammation in the lungs compared with control^[6].

IL-4 R alpha is regulated by IFN-beta in response to RSV (severe respiratory syncytial virus), exhibits sustained proinflammatory cytokine production^[6].

Mouse

HEK293

C-hFc

P16382-1 (I26-R233)

16190  [NCBI]

IKVLGEPTCFSDYIRTSTCEWFLDSAVDCSSQLCLHYRLMFFEFSENLTCIPRNSASTVCVCHMEMNRPVQSDRYQMELWAEHRQLWQGSFSPSGNVKPLAPDNLTLHTNVSDEWLLTWNNLYPSNNLLYKDLISMVNISREDNPAEFIVYNVTYKEPRLSFPINILMSGVYYTARVRVRSQILTGTWSEWSPSITWYNHFQLPLIQR

65-80 kDa

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

无菌粉末.

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

<1 EU/μg, determined by LAL method.

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).

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.

Room temperature in continental US; may vary elsewhere.

• [1]. Keegan AD,et al. An IL-4 receptor region containing an insulin receptor motif is important for IL-4-mediated IRS-1 phosphorylation and cell growth. Cell. 1994 Mar 11;76(5):811-20.  [Content Brief]

  [2]. Zurawski SM, et al. The primary binding subunit of the human interleukin-4 receptor is also a component of the interleukin-13 receptor. J Biol Chem. 1995 Jun 9;270(23):13869-78.  [Content Brief]

  [3]. Rolling C, et al. IL4 and IL13 receptors share the gamma c chain and activate STAT6, STAT3 and STAT5 proteins in normal human B cells. FEBS Lett. 1996 Sep 9;393(1):53-6.  [Content Brief]

  [4]. Jung T, et al. Soluble human interleukin-4 receptor is produced by activated T cells under the control of metalloproteinases. Int Arch Allergy Immunol. 1999 May;119(1):23-30.  [Content Brief]

  [5]. HageT,etal.Crystalstructureoftheinterleukin-4/receptoralphachaincomplexrevealsamosaicbindinginterface.Cell.1999Apr16;97(2):271-81.  [Content Brief]

  [6]. Shirey KA, Pletneva LM, Puche AC, Keegan AD, Prince GA, Blanco JC, Vogel SN. Control of RSV-induced lung injury by alternatively activated macrophages is IL-4R alpha-, TLR4-, and IFN-beta-dependent. Mucosal Immunol. 2010 May;3(3):291-300.  [Content Brief]

  [7]. Myburgh E, et al. Murine IL-4 is able to signal via chimeric human IL-4Ralpha/mouse gamma-chain receptor. Mol Immunol. 2008 Mar;45(5):1327-36.  [Content Brief]