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Related Experiment Videos

High-density functional display of proteins on bacteriophage lambda.

Amita Gupta1, Masanori Onda, Ira Pastan

  • 1Department of Biochemistry, University of Delhi South Campus, New Delhi 110021, India.

Journal of Molecular Biology
|November 11, 2003
PubMed
Summary

Researchers developed a new bacteriophage lambda system for displaying foreign peptides and proteins. This novel lambda phage display system shows significantly higher display density and efficiency compared to M13 phage systems.

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Area of Science:

  • Molecular Biology
  • Biotechnology
  • Protein Engineering

Background:

  • Phage display technology is crucial for protein engineering and drug discovery.
  • Existing systems, like M13 phage display, have limitations in display density and efficiency.
  • A need exists for improved phage display systems for high-throughput screening and interaction studies.

Purpose of the Study:

  • To design and optimize a novel bacteriophage lambda display system.
  • To enhance the display density and efficiency of foreign peptides and proteins.
  • To compare the performance of the lambda phage display system with the M13 phage system.

Main Methods:

  • Engineered a bacteriophage lambda system to fuse foreign peptides/proteins to the gpD head protein.
  • Utilized in vivo recombination between lox sites on a donor plasmid and recipient phage.

Related Experiment Videos

  • Cloned and displayed various lengths of HIV-1 p24 fragments and functional single-chain antibodies.

    • Main Results:

    • Achieved at least 100-fold higher display density on lambda phage compared to M13 phage.
    • Demonstrated high-density display of intact and functional foreign proteins, including single-chain antibodies.
    • Observed superior selective enrichment of epitope-bearing clones from gene-fragment libraries.

    Conclusions:

    • The developed bacteriophage lambda display system offers significantly higher efficiency and display density.
    • This system facilitates the study of low-affinity protein-protein interactions more effectively than M13 systems.
    • The system provides a robust platform for protein engineering, antibody selection, and epitope mapping.