IFNAR1 蛋白, Mouse (HEK293, His)

IFNAR1, one of the subunit of IFN-α/β receptor, is a type I IFN receptor. IFNAR1 forms the heterodimeric receptor with IFNAR2. IFNAR1 mediates IFN-induced STAT signaling by interacting with tyrosine kinase 2 (Tyk2)^[1][2]. Upon activation by these IFNs, IFNAR1 and IFNAR2 undergo a conformational change to promote a cascade of downstream signaling events, including the phosphorylation of Tyk2 and JAK1, STAT1 and STAT2^[3]. IFNAR1 Protein, Mouse (HEK293, His) is a recombinant mouse IFNAR1 (M1-T429) with C-terminal His tag, which is produced in HEK293 cells.

IFNAR1是IFN-α/β受体的亚基之一，是I型IFN受体。IFNAR1 表达于外周血 B 细胞和单核细胞，介导这些细胞的分化和活化^[4]。
IFNAR1 与酪氨酸激酶 2 (Tyk2) 相互作用，这种相互作用能够稳定质膜上的 IFNAR1^[1]。此外，IFNAR1 与 TYK2 结合并启动 I 型 IFN 诱导的 STAT 信号传导，但激活需要 IFNAR2 作为平台^[2]。IFN-α/-β 可诱导 IFNAR1 和 IFNAR2 结合，使 JAK1 和 TYK2 形成功能性信号单元^[1]。被这些 IFN 激活后，IFNAR1 和 IFNAR2 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。3]。小鼠体内缺乏 IFNAR1 使得小鼠极易受到细菌和寄生虫感染，小鼠体内 IFNAR1 缺乏还会加速肿瘤生长^[5][6]。
IFNAR1的氨基酸序列在不同物种中有所不同。人 IFNAR1 与小鼠的氨基酸序列同一性<50%。
IFNAR1 通过与酪氨酸激酶 2 (Tyk2) 相互作用介导 IFN 诱导的 STAT 信号传导^[1]。

IFNAR1 (mouse, 1 μg in 3 mL, i.v.) shows transferred IFNAR in the liver of the mice^[7].

Mouse

HEK293

C-His

P33896/NP_034638.2(E27-T429)

15975  [NCBI]

ENLKPPENIDVYIIDDNYTLKWSSHGESMGSVTFSAEYRTKDEAKWLKVPECQHTTTTKCEFSLLDTNVYIKTQFRVRAEEGNSTSSWNEVDPFIPFYTAHMSPPEVRLEAEDKAILVHISPPGQDGNMWALEKPSFSYTIRIWQKSSSDKKTINSTYYVEKIPELLPETTYCLEVKAIHPSLKKHSNYSTVQCISTTVANKMPVPGNLQVDAQGKSYVLKWDYIASADVLFRAQWLPGYSKSSSGSRSDKWKPIPTCANVQTTHCVFSQDTVYTGTFFLHVQASEGNHTSFWSEEKFIDSQKHILPPPPVITVTAMSDTLLVYVNCQDSTCDGLNYEIIFWENTSNTKISMEKDGPEFTLKNLQPLTVYCVQARVLFRALLNKTSNFSEKLCEKTRPGSFST

55-60 kDa

Greater than 95% as determined by reducing SDS-PAGE

无菌粉末

Lyophilized from a 0.2 μm filtered solution of PBS, pH 7.4 or 20 mM PB, 150 mM NaCl, 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.

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]. Zanin N, et al. Interferon Receptor Trafficking and Signaling: Journey to the Cross Roads. Front Immunol. 2021 Jan 20;11:615603.  [Content Brief]

  [2]. Shemesh M, et al. IFNAR1 and IFNAR2 play distinct roles in initiating type I interferon-induced JAK-STAT signaling and activating STATs. Sci Signal. 2021 Nov 23;14(710):eabe4627.  [Content Brief]

  [3]. Jun Zou, et al. Chapter 7 - Antiviral Immunity: Origin and Evolution in Vertebrates. The Evolution of the Immune System. 2016,Pages 173-204.

  [4]. Pogue SL, et al. The receptor for type I IFNs is highly expressed on peripheral blood B cells and monocytes and mediates a distinct profile of differentiation and activation of these cells. J Interferon Cytokine Res. 2004 Feb;24(2):131-9.  [Content Brief]

  [5]. Meyts I, et al. Viral infections in humans and mice with genetic deficiencies of the type I IFN response pathway. Eur J Immunol. 2021 May;51(5):1039-1061.  [Content Brief]

  [6]. Fujita M, et al. Role of type 1 IFNs in antiglioma immunosurveillance--using mouse studies to guide examination of novel prognostic markers in humans. Clin Cancer Res. 2010 Jul 1;16(13):3409-19.  [Content Brief]

  [7]. Tochizawa S, et al. Functional expression of human type I interferon receptors in the mouse liver. Biochem Biophys Res Commun. 2006 Jul 21;346(1):61-6.  [Content Brief]