IFN-alpha 7/IFNA7 Protein, Human (P.pastoris, His)

IFN-alpha 7 (IFNA7), belongs to type I interferon family, is produced by macrophages with antiviral activities^[1]. IFN-alpha 7/IFNA7 Protein, Human (P.pastoris, His) contains 166 a.a. (C24-D189), produced in P.pastoris yeast cells with a C-terminal His-tag.

IFN-alpha 7 (IFNA7; IFN-α7), belongs to the alpha/beta interferon (IFN) family, is produced by the macrophages with antiviral activities^[1]. Interferon (IFN) is originally identified as a substance ‘interfering’ with viral replication in vitro. IFN-α/β and related molecules are classified as type I IFNs, as for the other two types of type II IFN (IFN-γ) and type III IFNs (IFN-λ), respectively^[2].
Interferon stimulates the production of two enzymes: a protein kinase and an oligoadenylate synthetase. Interferon alpha (IFNa) shows significant biological activity in various cancers, paticularly haematological malignancies such as hairy cell leukaemia and chronic myelogenous leukaemia^[3].
IFNα-7 is identified as positive regulators that increases FOXP3 expression and/or decreases CTLA4 expression. Therefore, regulatory T cells (Tregs) as the key cells regulating peripheral autoreactive T lymphocytes, IFNα-7 regulates Treg functional states to protect Treg phenotype stabilization^[4].
As for a wildly use of IFN in animal model, the sequence of amino acids in IFNA7 protein of human is very different from mouse (58.73%)

IFN-alpha 7 (1^-1.9-1^-6.6 M; 24-26 h) results a signifcant reduction of FOXP3 gene expression in regulatory T cells (Tregs) without affecting cell viability^[4].

Measured in antiviral assays using WISH cells infected with vesicular stomatitis virus. The ED₅₀ for this effect is 9.1 pg/mL.

Human

P. pastoris

C-His

P01567/NP_066401.2 (C24-D189)

3444  [NCBI]

Full Length of Mature Protein

CDLPQTHSLRNRRALILLAQMGRISPFSCLKDRHEFRFPEEEFDGHQFQKTQAISVLHEMIQQTFNLFSTEDSSAAWEQSLLEKFSTELYQQLNDLEACVIQEVGVEETPLMNEDFILAVRKYFQRITLYLMEKKYSPCAWEVVRAEIMRSFSFSTNLKKGLRRKD

Approximately 21 kDa, based on SDS-PAGE under reducing conditions.

≥ 95%, as determined by reducing SDS-PAGE.

Solution

Supplied as a 0.2 μm filtered solution of PBS, pH 7.4.

<1 EU/μg, determined by LAL method.

N/A.

Stored at -80°C for 1 year from date of receipt. It is stable at -20°C for 3 months after opening. It is recommended to freeze aliquots at -80°C for extended storage. Avoid repeated freeze-thaw cycles.

Shipping with dry ice.

• [1]. Kumagai Y, et al. Alveolar macrophages are the primary interferon-alpha producer in pulmonary infection with RNA viruses. Immunity. 2007 Aug;27(2):240-52.  [Content Brief]

  [2]. Zhang SY, et al. Inborn errors of interferon (IFN)-mediated immunity in humans: insights into the respective roles of IFN-alpha/beta, IFN-gamma, and IFN-lambda in host defense. Immunol Rev. 2008 Dec;226:29-40.  [Content Brief]

  [3]. Raj NB, et al. Identification of a novel virus-responsive sequence in the promoter of murine interferon-alpha genes. J Biol Chem. 1991 Jun 15;266(17):11360-5.  [Content Brief]

  [4]. Ding M, et al. Secretome screening reveals immunomodulating functions of IFNα-7, PAP and GDF-7 on regulatory T-cells. Sci Rep. 2021 Aug 18;11(1):16767.  [Content Brief]