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Related Experiment Videos

Complete sequence of an IS element present in pSC101.

A Bernardi, F Bernardi

    Nucleic Acids Research
    |June 25, 1981
    PubMed
    Summary

    A novel insertion element, IS102, found in plasmid pSC101, has been fully sequenced. Its 1057 bp sequence shares homology with Tn903 but lacks flanking repeats, suggesting unique transposition mechanisms.

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    Area of Science:

    • Molecular Biology
    • Genetics
    • Microbiology

    Background:

    • Plasmid pSC101 is a well-characterized low-copy-number plasmid.
    • Insertion elements (IS) are mobile genetic components that play roles in genome evolution.
    • IS102 is a recently identified insertion element within plasmid pSC101.

    Purpose of the Study:

    • To determine the complete nucleotide sequence of the IS102 insertion element.
    • To compare the sequence and structural features of IS102 with related mobile elements.
    • To analyze the potential coding capabilities of IS102.

    Main Methods:

    • DNA sequencing to determine the full length of IS102.
    • Sequence alignment and comparison with known insertion sequences and transposons.
    • Bioinformatic analysis to predict open reading frames and functional domains.

    Main Results:

    • The complete sequence of IS102 was determined to be 1057 base pairs.
    • A significant homology (338 bp) was identified at one end of IS102 with the kanamycin resistance transposon Tn903.
    • IS102 was found to not be flanked by any direct repeats, distinguishing it from many other IS elements.

    Conclusions:

    • IS102 represents a distinct insertion element with structural similarities to Tn903 but unique flanking features.
    • The sequence data provides a basis for understanding IS102's transposition mechanism and potential role in pSC101 evolution.
    • Further investigation into IS102's coding capacity and functional properties is warranted.

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