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Cloning vectors derived from the Pseudomonas plasmid pVS1.

Y Itoh, D Haas

    Gene
    |January 1, 1985
    PubMed
    Summary

    Researchers developed stable gene-cloning vectors from the Pseudomonas plasmid pVS1. These new vectors, including pME260, pME290, and pME285, offer selectable markers for Pseudomonas research and genetic engineering applications.

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    Area of Science:

    • Microbiology
    • Molecular Biology
    • Genetic Engineering

    Background:

    • The Pseudomonas plasmid pVS1 is a multi-copy plasmid.
    • Stable gene-cloning vehicles are essential for genetic manipulation in Pseudomonas.

    Purpose of the Study:

    • To construct stable gene-cloning vectors from a minimal replicon of Pseudomonas plasmid pVS1.
    • To evaluate the utility of these vectors in various Pseudomonas species.

    Main Methods:

    • Reduction of Pseudomonas plasmid pVS1 to a minimal replicon.
    • Construction of nonmobilizable (pME260, pME290) and mobilizable (pME285) plasmids.
    • Introduction of selectable markers: carbenicillin (bla) and kanamycin (aph) resistance genes.
    • Inclusion of mercuric ion resistance genes (merRTCA) in pME285.
    • Testing vector maintenance and compatibility in diverse Pseudomonas strains.

    Main Results:

    • Successfully constructed three stable gene-cloning vectors: pME260, pME290, and pME285.
    • pME260 and pME290 contain bla and aph genes for carbenicillin and kanamycin resistance.
    • pME285 contains aph and merRTCA genes for kanamycin and mercuric ion resistance.
    • The merD gene was found dispensable for mercuric ion resistance.
    • pME290 demonstrated broad host range maintenance in multiple Pseudomonas species and compatibility with IncP-1 and IncP-4 replicons.

    Conclusions:

    • The developed vectors are stable and suitable for gene cloning in Pseudomonas.
    • The selectable markers provide effective tools for genetic studies.
    • The broad host range and compatibility of pME290 enhance its utility for Pseudomonas research.

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