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Updated: Jul 2, 2026

Development and Validation of an Ultrasensitive Single Molecule Array Digital Enzyme-linked Immunosorbent Assay for Human Interferon-α
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Engineering human interferon alpha1c/86D with phage display technology.

X Ma1, R Hu, H Lü

  • 1State Key Laboratory for Molecular Virology and Genetic Engineering, Beijing, China.

Science in China. Series C, Life Sciences
|August 30, 2008
PubMed
Summary
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Researchers engineered phage-displayed human interferon-alpha1c/86D (IFNalpha1c/86D) to enhance antiviral activity. Key residues were identified, and variants with 4-16 fold increased activity were developed.

Area of Science:

  • Biotechnology
  • Molecular Biology
  • Virology

Background:

  • Phage display technology enables protein engineering.
  • Interferon-alpha (IFN-alpha) is crucial for antiviral responses.
  • Understanding IFN-alpha receptor interactions is key to developing potent therapeutics.

Purpose of the Study:

  • To engineer phage-displayed human interferon-alpha1c/86D (IFNalpha1c/86D) with enhanced antiviral properties.
  • To identify critical amino acid residues involved in IFN-alpha receptor binding.
  • To generate and select IFN-alpha variants with improved specific activity.

Main Methods:

  • Functional display of IFNalpha1c/86D on filamentous bacteriophage using pCANTAB5E.
  • Phage-displayed 6-mer peptide library and antibody screening to map receptor-binding sites.

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Last Updated: Jul 2, 2026

Development and Validation of an Ultrasensitive Single Molecule Array Digital Enzyme-linked Immunosorbent Assay for Human Interferon-α
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  • Cassette mutagenesis of critical residues in the AB-loop.
  • WISH-based panning for selection of high-activity phage-IFN variants.

    • Main Results:

    • Identified critical residues in the AB-loop (30, 33, 34) and D helix/DE-loop (124, 126, 127) for receptor recognition.
    • Generated a phage-IFN variant library through targeted mutagenesis.
    • Isolated three phage-IFN variants exhibiting 4-16 fold higher antiviral activity compared to the parental type after induction.

    Conclusions:

    • Phage display is an effective platform for engineering IFN-alpha variants.
    • Specific amino acid residues are critical for IFN-alpha receptor binding and activity.
    • Engineered phage-IFN variants show potential for increased therapeutic efficacy.