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Related Experiment Videos

A surface expression vector for antibody screening.

F Breitling1, S Dübel, T Seehaus

  • 1Institute of Cell and Tumor Biology, German Cancer Research Center, Heidelberg.

Gene
|August 15, 1991
PubMed
Summary
This summary is machine-generated.

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Researchers developed a novel phagemid system for antibody selection. This system allows for efficient antibody library amplification and analysis by fusing antibodies to a phage protein, enabling specific antigen binding and selection.

Area of Science:

  • Molecular Biology
  • Immunotechnology
  • Biotechnology

Background:

  • Selecting specific antibodies from large recombinant libraries typically requires significant amounts of antigen.
  • Existing phage display systems can be prone to issues like deletion mutant overgrowth during library amplification.

Purpose of the Study:

  • To construct a phagemid system for efficient antibody selection using minimal antigen.
  • To develop a method for tightly repressing antibody gene expression to prevent library dominance by unwanted mutants.
  • To facilitate the analysis of antibody fusion proteins.

Main Methods:

  • Construction of a phagemid expressing a single-chain antibody fused to the phage pIII protein (Ab::pIII).
  • Utilizing wild-type fd phage for induction of fusion protein production without IPTG.

Related Experiment Videos

  • Characterization of the Ab::pIII fusion protein using monoclonal antibodies and antisera.
  • Assembly of fusion protein into infectious phagemid particles for antigen enrichment.

    • Main Results:

    • Successful construction and expression of the Ab::pIII fusion protein.
    • Demonstrated antigen-binding capability of the fusion protein.
    • Production of infectious phagemid particles containing the Ab::pIII fusion protein.
    • Efficient enrichment of phagemid particles on immobilized antigen.
    • Tight repression of the Ab::pIII gene allows for safe library amplification.

    Conclusions:

    • The developed phagemid system enables specific antibody selection from large libraries with minimal antigen.
    • The tight repression system prevents library domination by deletion mutants, ensuring library integrity.
    • The system facilitates both antibody selection and subsequent analysis of the fusion protein.