IL-2R beta/CD122 蛋白, Human (HEK293, Fc)

IL-2R beta (CD122), a type Ⅰ cytokine receptor expressed on T lymphocytes, is a receptor for IL-2 (K_d: 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, Fc) is a recombinant human extracellular region of IL-2R beta (A27-D239) with a C-Terminal Fc tag, which is produced in HEK293 cells.

IL-2R beta (CD122) 是一种 I 型细胞因子受体，属于 4 型亚家族。IL-2R beta 也是 IL-15 受体的关键组成部分。IL-2R beta 广泛表达于脾脏、血液和淋巴结，如 B 和 T 淋巴细胞^[1][3]。
IL-2R beta 中的氨基酸在不同物种中有所不同。人 IL-2R beta 与小鼠和大鼠的氨基酸序列一致性 <60%。
IL-2R beta 细胞质结构域与 IL-2 异二聚化，导致信号通路激活：磷酸肌醇 3-激酶 (PI3-K) /AKT、Ras-MAP 激酶和 JAK-STAT 通路^[4]。IL-2R beta 以中等亲和力结合 IL-2。IL-2R beta 介导 IL-2 内化和信号转导，例如细胞增殖或分化^[5]。IL-2R beta 与 IL-2 相互作用，增加 CD4+ T 淋巴细胞的比例^[1]。IL-2R 刺激 T 细胞增殖并激活淋巴因子激活的杀伤细胞^[2]。
IL-2R beta 介导 T 细胞免疫反应，还介导内吞作用以及转导有丝分裂IL-2的信号。

Human

HEK293

C-Fc

P14784 (A27-D239)

3560  [NCBI]

AVNGTSQFTCFYNSRANISCVWSQDGALQDTSCQVHAWPDRRRWNQTCELLPVSQASWACNLILGAPDSQKLTTVDIVTLRVLCREGVRWRVMAIQDFKPFENLRLMAPISLQVVHVETHRCNISWEISQASHYFERHLEFEARTLSPGHTWEEAPLLTLKQKQEWICLETLTPDTQYEFQVRVKPLQGEFTTWSPWSQPLAFRTKPAALGKD-Fctag

60-80 kDa

Greater than 95% as determined by reducing SDS-PAGE.

<1 EU/μg, determined by LAL method.

• [1]. Xiujuan Zhou, et al. Interleukin-2 (IL-2) Interacts With IL-2 Receptor Beta (IL-2Rβ): Its Potential to Enhance the Proliferation of CD4+ T Lymphocytes in Flounder ( Paralichthys olivaceus). Front Immunol. 2020 Sep 9;11:531786.  [Content Brief]

  [2]. R N Bamfordm, et al. The interleukin (IL) 2 receptor beta chain is shared by IL-2 and a cytokine, provisionally designated IL-T, that stimulates T-cell proliferation and the induction of lymphokine-activated killer cells. Proc Natl Acad Sci U S A.1994 May  [Content Brief]

  [3]. Xiujuan Zhou, et al. Immunological characteristics of Interleukin-2 receptor subunit beta (IL-2Rβ) in flounder (Paralichtlys olivaceus): Implication for IL-2R function. Fish Shellfish Immunol. 2019 Oct;93:641-651.  [Content Brief]

  [4]. Akira Sakai, et al. The role of tumor-associated macrophages on serum soluble IL-2R levels in B-cell lymphomas. J Clin Exp Hematop. 2014;54(1):49-57.  [Content Brief]

  [5]. M Allouche, et al. Interleukin 2 receptors. Leuk Res. 1990;14(8):699-703.  [Content Brief]