IFN-α/β R2是IFN-α/β受体的亚基之一,是I型干扰素受体。IFN-α/β R2 在外周血 B 细胞和单核细胞上表达,介导这些细胞的分化和活化。
促销: 满免 购物 满300元 免运费。
商品编号: GX004902 库存: 100支
上市时间: 2024-11-19 14:55:13 浏览次数: 570次
研究方向
IFN-α/β R2是IFN-α/β受体的亚基之一,是I型干扰素受体。IFN-α/β R2 在外周血 B 细胞和单核细胞上表达,介导这些细胞的分化和活化。
IFN-α/β R2 形成异二聚体受体( IFN-α/β 受体)与 IFNAR1 一起。IFN-α/-β 等 IFN 可以诱导 IFNAR1 和 IFN-α/β R2 结合,从而使 JAK1 和 TYK2 形成功能性信号传导单元。被这些 IFN 激活后,IFNAR1 和 IFN-α/β R2 会发生构象变化,促进一系列下游信号传导事件。信号转导事件包括 Tyk2 和 JAK1(转录 STAT1 和 STAT2 的信号转导子和激活子)的磷酸化,以及由磷酸化 STAT1 和 STAT2 以及 IRF9 组成的 IFN 刺激基因因子 3 (ISGF3) 复合物的形成。IFNAR2 对于抗病毒免疫至关重要。
人 IFN-α/β R2 由胞外结构域 (I27-K243)、螺旋结构域 (I244-L264) 和胞浆结构域组成域(K265-R515)。IFN-α/β R2 的氨基酸序列在不同物种中有所不同。人 IFN-α/β R2 与小鼠的氨基酸序列同一性<50%。
IFN-α/β R2 介导 IFN 诱导的 IFNAR 和 STAT 蛋白酪氨酸磷酸化,并激活 JAK-STAT 信号级联反应。
Measured by its binding abilityin a functional ELISA. When Recombinant Human IFN-alpha / beta R1 is present at 10 μg/mL, it binds to Recombinant Human IFN‑ alpha / beta R2 Fc Chimera in the presence of recombinant human IFN-alpha 2. The concentration of Recombinant Human IFN-alpha / beta R2 Fc Chimera that produces 50% of the optimal binding response is approximately 0.5-1.5 μg/mL.
Interferon-alpha/beta receptor alpha chain (IFNAR1) is a type I membrane protein that forms one of the two chains of a receptor for interferons alpha and beta. Binding and activation of the receptor stimulate Janus protein kinases, which in turn phosphorylate several proteins, including STAT1 and STAT2. The encoded protein also functions as an antiviral factor. Tyk2 slows down IFNAR1 degradation and that this is due, at least in part, to inhibition of IFNAR1 endocytosis. Mutant versions of IFNAR1, in which Tyr466 is changed to phenylalanine, can act in a dominant-negative manner to inhibit phosphorylation of STAT2. These observations are consistent with a model in which IFNAR1 mediates the interaction between JAK kinases and the STAT transcription factors.