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IFN-lambda 2/IL-28A Protein, Human (HEK293, His)

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IFN-lambda 2 (IL-28A) is a member of the Type-III interferon family. IFN-lambda 2 has antiviral antitumour and immunomodulatory activities. IFN-lambda 2 signals through a heterodimeric receptor complex comprising IFNLR1 and IL-10RB. When binding to the receptor complex, Jak1 and Tyk2 will be activated, and leads to tyrosine phosphorylation of the IFN-λR1 and activation of STAT1 and STAT2. Activated STAT1 and STAT2 together with IRF-9 form a trimeric transcription factor complex (ISGF3). The formed ISGF3 then translocate to the nucleus and promotes the production of IFN-stimulated genes (ISGs). IFN-lambda 2/IL-28A Protein, Human (HEK293, His) is a recombinant human IFN-lambda 2 (V26-V200) with C-terminal 6*His tag, which is expressed in HEK293.

For research use only. We do not sell to patients.
  • Species: Human
  • Source: HEK293
  • Storage:
    Stored at -20°C for 2 years from date of receipt. 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.
  • IFN-lambda 2/IL-28A Protein, Human (HEK293, His) Product Image
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To place orders, for customer services and technical support, please contact:

609-228-6898
[email protected] [email protected]
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  • Biological Activity
  • Technical Parameters
  • Product Properties
  • Documentation
  • References
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Biological Activity

Description

IFN-lambda 2 (IL-28A) is a member of the Type-III interferon family. IFN-lambda 2 has antiviral antitumour and immunomodulatory activities[1]. IFN-lambda 2 signals through a heterodimeric receptor complex comprising IFNLR1 and IL-10RB. When binding to the receptor complex, Jak1 and Tyk2 will be activated, and leads to tyrosine phosphorylation of the IFN-λR1 and activation of STAT1 and STAT2. Activated STAT1 and STAT2 together with IRF-9 form a trimeric transcription factor complex (ISGF3). The formed ISGF3 then translocate to the nucleus and promotes the production of IFN-stimulated genes (ISGs)[2]. IFN-lambda 2/IL-28A Protein, Human (HEK293, His) is a recombinant human IFN-lambda 2 (V26-V200) with C-terminal 6*His tag, which is expressed in HEK293.

Background

IFN-lambda 2 (IL-28A) is a member of the Type-III interferon family. Human IFN-lambda 2 shares 65.1% common aa identity with mouse. IFN-lambda 2 is produced particularly by dendritic cells (DCs), When following viral or bacterial infection[3].
IFN-lambda 2 mediates effects by a heterodimeric receptor complex comprising IFNλ receptor 1 (IFNLR1) and IL-10 receptor subunit-β (IL-10RB). When binding to the receptor complex, Jak1 and Tyk2 will be activated, and leads to subsequent tyrosine phosphorylation of the IFN-λR1 (intracellular domain, Tyr406 and Tyr343, Tyr517), and activation of STAT1 and STAT2. Activated STAT1 and STAT2 together with IRF-9 (p48) form a trimeric transcription factor complex (ISGF3). The formed ISGF3 complexes then translocate to the nucleus and promotes the production of IFN-stimulated genes (ISGs) such as IRF7, MX1, and OAS1[2].
IFN-lambda 2 has antiviral antitumour and immunomodulatory activities[1]. IFN-lambda 2 has been reported to modulate CD11c+ DC cell function and promote Th1 differentiation, thus suppressing allergic airway diseases[4].

In Vitro

IFN-lambda 2 (100 nM, 12 h) protects the epithelial barrier and upregulates the expression of claudin-1 in Caco-2 cells[6].

In Vivo

IFN-lambda 2 (murine, 2 μg, i.p.) aggravates experimental sepsis in CLP or S. aureus infected mice, facilitates bacterial dissimilation and limits neutrophil recruitment[5].
IFN-lambda 2 (murine, 0.5 µg, i.p.) protects against intestinal I/R injury in mice[6].

Technical Parameters

  • Species Human
  • Source HEK293
  • Tag C-6*His
  • Accession

    Q8IZJ0 (V26-V200)

  • Gene ID
    282616  [NCBI]
  • Molecular Construction
    • N-term
    • IFN-λ2 (V26-V200)
      Accession # Q8IZJ0
    • 6*His
    • C-term
  • Protein Length

    Full Length of Mature Protein

  • Synonyms

    IFNL2; Interleukin-28A; Prev. IL28A; Interleukin 28A; IL-28A; ZCYTO20; Interleukin 28A (Interferon, Lambda 2); IFNL2a; Interferon Lambda-2; IFNL3a; Cytokine Zcyto20; Interferon Lambda 2; IFN-Lambda-2

  • AA Sequence

    VPVARLHGALPDARGCHIAQFKSLSPQELQAFKRAKDALEESLLLKDCRCHSRLFPRTWDLRQLQVRERPMALEAELALTLKVLEATADTDPALVDVLDQPLHTLHHILSQFRACIQPQPTAGPRTRGRLHHWLYRLQEAPKKESPGCLEASVTFNLFRLLTRDLNCVASGDLCV

  • Predicted Molecular Mass

    20.6 kDa

  • Molecular Weight

    Approximately 20 kDa, based on SDS-PAGE under reducing conditions.

  • Purity

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

Product Properties

Appearance

Lyophilized powder.

Formulation

Lyophilized from a 0.22 μm filtered solution of PBS, pH 7.4.

Endotoxin Level

<1 EU/μg, determined by LAL method.

Reconstitution

It is not recommended to reconstitute to a concentration less than 100 μg/mL in ddH2O. For long term storage it is recommended to add a carrier protein (0.1% BSA, 5% HSA, 10% FBS or 5% Trehalose).

Storage & Stability

Stored at -20°C for 2 years from date of receipt. 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.

Shipping

Room temperature in continental US; may vary elsewhere.

References

[1]. Lopušná K, et al. Interferons lambda, new cytokines with antiviral activity. Acta Virol. 2013;57(2):171-9. [Content Brief]

[2]. Donnelly RP, et al. Interferon-lambda: a new addition to an old family. J Interferon Cytokine Res. 2010 Aug;30(8):555-64. [Content Brief]

[3]. Witte K, et al. IL-28A, IL-28B, and IL-29: promising cytokines with type I interferon-like properties. Cytokine Growth Factor Rev. 2010 Aug;21(4):237-51. [Content Brief]

[4]. Yan B, et al. Interleukin-28B dampens airway inflammation through up-regulation of natural killer cell-derived IFN-γ. Sci Rep. 2017 Jun 15;7(1):3556. [Content Brief]

[5]. Luo Q, et al. Interleukin 28 is a potential therapeutic target for sepsis. Clin Immunol. 2019 Aug;205:29-34. [Content Brief]

[6]. Liangzi Li, et al. Interleukin-28A maintains the intestinal epithelial barrier function through regulation of claudin-1. [Content Brief]

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Calculators

Reconstitution Calculator

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The Specific Activity Calculator Equation
  • Specific Activity (Unit/mg)
  • Biological Activity (ED50)

Specific Activity (Unit/mg) = 106 ÷ Biological Activity (ED50)

Specific Activity (Unit/mg) Specific Activity (Unit/mg)
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Biological Activity (ED50) Biological Activity (ED50)
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MOQ
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100 mg

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Measured by its ability to inhibit anti-CD3-induced proliferation of stimulated CTLL-2 mouse cytotoxic T cells. The ED50 this effect is 0.8023 μg/ml, corresponding to a specific activity is 1246.42 units/mg.

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