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Related Experiment Videos

Construction of a broad-host-range kanamycin-resistant plasmid vector.

R Roychoudhury, A Lam

    Gene
    |September 1, 1983
    PubMed
    Summary

    A novel plasmid, pIRL2, was engineered for efficient gene cloning in plants. This broad-host-range plasmid offers versatile cloning sites and retains essential resistance genes for genetic engineering applications.

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    Area of Science:

    • Molecular Biology
    • Microbiology
    • Biotechnology

    Background:

    • Plasmid vectors are essential tools in molecular biology for gene cloning and manipulation.
    • Broad-host-range plasmids are particularly valuable for genetic engineering in diverse bacterial species, including plant-associated bacteria.

    Purpose of the Study:

    • To construct and characterize a new broad-host-range plasmid vector, pIRL2, for enhanced gene cloning applications.
    • To evaluate the utility of pIRL2 in genetic engineering of plant cells via Rhizobium and Agrobacterium.

    Main Methods:

    • Construction of the pIRL2 plasmid using a kanamycin resistance (Kmr) gene fragment and BamHI cohesive ends.
    • Characterization of pIRL2 for unique restriction enzyme cloning sites (EcoRI, SstI, HindIII, SmaI, SalI, XhoI, BglII).
    • Assessment of gene expression (neo and sul promoters) and retention of broad-host-range functionality.

    Main Results:

    • A 10.2-kb plasmid, pIRL2, was successfully constructed with versatile cloning sites.
    • The plasmid allows for cloning without loss of Kmr or via insertional inactivation of the Kmr gene.
    • pIRL2 retains the broad-host-range capabilities of the parent plasmid R300B.

    Conclusions:

    • The pIRL2 plasmid is a robust and versatile tool for gene cloning in various bacterial hosts.
    • Its broad-host-range nature makes it suitable for genetic engineering of plant cells using Rhizobium and Agrobacterium species.

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