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Related Experiment Videos

An improved bacteriophage lambda vector: construction of model recombinants coding for kanamycin resistance.

D J Donoghue, P A Sharp

    Gene
    |May 1, 1977
    PubMed
    Summary

    Researchers developed an attenuated bacteriophage lambda (EK2 vector) capable of carrying foreign DNA. This engineered phage exhibits reduced host interaction, enhancing its safety for molecular biology applications.

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    Area of Science:

    • Molecular Biology
    • Virology
    • Genetic Engineering

    Background:

    • Bacteriophage lambda vectors are crucial tools in molecular biology.
    • Development of safer and more efficient vectors is an ongoing research area.

    Purpose of the Study:

    • To engineer an attenuated bacteriophage lambda as an EK2 vector.
    • To characterize its DNA-carrying capacity and safety features.

    Main Methods:

    • Construction of an attenuated bacteriophage lambda (lambdagt vir Jam27 Zam718-lambdaB') with specific mutations.
    • Deletion of phage recombination functions and insertion of foreign DNA via Eco RI ends.
    • In vitro recombination with a kanamycin resistance gene fragment.

    Main Results:

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    • The engineered phage accommodates up to 11.10(6) daltons of foreign DNA.
    • Virulence mutations and reduced adsorption rate enhance biological containment.
    • Model recombinants demonstrated transfer of kanamycin resistance in E. coli.

    Conclusions:

    • The developed bacteriophage lambda serves as a safe and effective EK2 vector.
    • Its engineered properties facilitate controlled genetic manipulation and containment.
    • Further studies can explore its utility in various molecular cloning applications.