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Related Experiment Videos

A complex repeated DNA sequence within the Drosophila transposable element copia.

D L Fouts, J E Manning, G M Fox

    Nucleic Acids Research
    |December 21, 1981
    PubMed
    Summary

    Researchers identified and characterized a 320 nucleotide DNA sequence within the copia coding element of Drosophila melanogaster. This AT-rich region contains three subunits that repeat, forming a complex structure with potential regulatory functions.

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    Area of Science:

    • * Molecular Biology
    • * Genetics
    • * Genomics

    Background:

    • * The copia element is a retrotransposon found in Drosophila melanogaster.
    • * Understanding repetitive DNA sequences is crucial for deciphering genome organization and function.

    Purpose of the Study:

    • * To identify and characterize a specific repeated DNA sequence within the copia coding element.
    • * To determine the structure and potential functional significance of this repetitive DNA.

    Main Methods:

    • * DNA-DNA hybridization for sequence localization.
    • * Electron microscopy of heteroduplexes for structural analysis.
    • * Primary sequence determination of the repeated DNA.

    Main Results:

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  • * A 320 nucleotide repeated DNA sequence was identified in the middle of the copia coding region.
  • * The sequence comprises three related subunits (A, B, C) forming a higher-order repeat, duplicated with divergence.
  • * The sequence is AT-rich and contains three presumptive polyadenylation signals and two inverted repeat sequences.

    • Conclusions:

    • * A complex, internally repetitive DNA sequence exists within the copia coding element.
    • * This sequence's structure suggests potential roles in gene regulation or element stability.
    • * Further investigation is needed to elucidate the functional implications of these repeats.