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Related Experiment Videos

Multipurpose vectors for peptide expression on the M13 viral surface.

D M Fowlkes1, M D Adams, V A Fowler

  • 1University of North Carolina, Chapel Hill.

Biotechniques
|September 1, 1992
PubMed
Summary

Researchers created novel M13 phage cloning vectors for surface protein expression. These vectors enable efficient purification of engineered bacteriophages displaying foreign epitopes, like the c-myc tag, using antibody-based panning techniques.

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Area of Science:

  • Molecular Biology
  • Biotechnology
  • Virology

Background:

  • M13 phage display technology is a powerful tool for protein engineering and antibody selection.
  • Efficient methods are needed to express and isolate foreign polypeptides on the M13 viral surface.

Purpose of the Study:

  • To develop and characterize novel M13 phage cloning vectors for expressing foreign polypeptides on the M13 viral coat.
  • To demonstrate the utility of these vectors for isolating engineered phages using affinity purification.

Main Methods:

  • Engineered M13mp8 genome for foreign protein expression at the NH2-terminus of the pIII protein.
  • Developed three vectors with unique cloning sites, tetracycline resistance, and lacZ' complementation.
  • Utilized panning techniques with a monoclonal antibody (9E10) and streptavidin-coated beads for purification.

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Main Results:

  • The developed vectors facilitate expression of foreign protein sequences on the M13 phage surface.
  • Engineered M13 phage displaying a human c-myc epitope were successfully purified from complex phage mixtures.
  • Affinity purification using antibody-based panning proved effective for isolating specific phage particles.

Conclusions:

  • The novel M13 cloning vectors provide a versatile platform for displaying foreign polypeptides on phage surfaces.
  • These vectors simplify the recovery and enrichment of engineered M13 bacteriophages.
  • The developed system is suitable for applications requiring the selection and purification of specific phage display libraries.