IFN-gamma R2 Protein, Human (CHO)

IFN-gamma R2, one of the subunit of IFN-gamma receptor, is a receptor for IFN-gamma. IFN-gamma R2 is the signal-transducing chain of the IFN-gamma receptor. IFN-gamma R2 forms the functional receptor with IFN-gamma R1. Upon binding with IFN-gamma, IFN-gamma R2 and IFN-gamma R1 oligomerize and transphosphorylate^[1]. Then, the downstream signaling components JAK1 and JAK2 are phosphorylated and activated, and STAT1 is phosphorylated. Phosphorylated STAT1 translocates to the nucleus, where it regulates the expression of IFN-responsive genes (e.g. CD54)^[2]. IFN-gamma R2 Protein, Human (CHO) is a recombinant human IFN-gamma R2 (S28-Q247) without any tag, which is produced in CHO cells.

IFN-gamma R2, one of the subunit of IFN-gamma receptor, is a receptor for IFN-gamma. IFN-gamma R2. IFN-gamma R2 is highly expressed on myeloid cells, moderately on B cells and low on T cells, and the expression is regulated by the state of cellular differentiation or activation^[2].
IFN-gamma R2 can associate with IFN-gamma R1 to form a functional receptor. Upon binding with IFN-gamma, IFN-gamma R2 and IFN-gamma R1 oligomerize and transphosphorylate^[1]. Then, JAK1 and JAK2 are phosphorylated and activated, creating a binding site for STAT1. STAT1 is recruited to the receptor complex and leads to the phosphorylation. Phosphorylated STAT1 translocates to the nucleus, where it regulates the expression of IFN-responsive genes (e.g. CD54). IFN-gamma R2 is important for innating immune defense against mycobacterial infections. Defects in IFN-gamma R2 causes mendelian susceptibility to mycobacterial disease (MSMD)^[2].
Human IFN-gamma R2 consists of extracellular domain (S28-Q247), helical domain (V248-F268), and cytoplasmic domain (L269-L337).
IFN-gamma R2 plays a critical role in antimicrobial, and immune responses^[2].

ED₅₀ < 0.1 μg/ml, measured in a cell cytotoxicity assay using HT-29 (HTB-38) cells in the presence of 1.0 ng/ml human IFN-gamma.

Human

CHO

Tag Free

P38484 (S28-Q247)

3460  [NCBI]

SQLPAPQHPKIRLYNAEQVLSWEPVALSNSTRPVVYQVQFKYTDSKWFTADIMSIGVNCTQITATECDFTAASPSAGFPMDFNVTLRLRAELGALHSAWVTMPWFQHYRNVTVGPPENIEVTPGEGSLIIRFSSPFDIADTSTAFFCYYVHYWEKGGIQQVKGPFRSNSISLDNLKPSRVYCLQVQAQLLWNKSNIFRVGHLSNISCYETMADASTELQQ

38-40 kDa

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

Lyophilized powder.

Lyophilized after extensive dialysis against PBS.

<0.2 EU/μg, determined by gel clotting method

It is not recommended to reconstitute to a concentration less than 100 μg/mL in PBS. 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]. Castro F, et al. Interferon-Gamma at the Crossroads of Tumor Immune Surveillance or Evasion. Front Immunol. 2018 May 4;9:847.  [Content Brief]

  [2]. Pestka S, et al. The interferon gamma (IFN-gamma) receptor: a paradigm for the multichain cytokine receptor. Cytokine Growth Factor Rev. 1997 Sep;8(3):189-206.  [Content Brief]

  [3]. van de Vosse E, et al. IFN-γR1 defects: Mutation update and description of the IFNGR1 variation database. Hum Mutat. 2017 Oct;38(10):1286-1296.  [Content Brief]