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Drosophila forked locus.

A McLachlan

    Molecular and Cellular Biology
    |January 1, 1986
    PubMed
    Summary
    This summary is machine-generated.

    Researchers identified DNA insertions in a 40-kilobase-pair region of the Drosophila X chromosome, linking them to forked alleles. A specific 2.6-kilobase RNA transcript, present during pupal stages, was found to be less abundant in forked mutants, suggesting it is the product of the forked gene.

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    Area of Science:

    • Developmental Biology
    • Genetics
    • Molecular Biology

    Background:

    • The forked locus in Drosophila melanogaster is known to have complex pseudoallelic arrangements.
    • Understanding gene organization and expression is crucial for deciphering developmental processes.

    Purpose of the Study:

    • To clone and characterize a 40-kilobase-pair region of the Drosophila X chromosome associated with the forked locus.
    • To identify DNA insertions corresponding to various forked alleles.
    • To analyze the transcriptional products within this region and their relationship to forked mutations.

    Main Methods:

    • Cloning of a specific 40-kilobase-pair DNA region from the Drosophila X chromosome (band 15F).
    • Identification of DNA insertions for several forked alleles (f1, f3, f3n, f5, f36a, fs, fx).

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  • Analysis of RNA transcripts (0.8, 2.6, and 3.3 kilobases) using Northern blotting or similar techniques across different developmental stages and mutant lines.

    • Main Results:

    • DNA insertions for multiple forked alleles were mapped within the cloned region, consistent with known pseudoallelic organization.
    • Three distinct RNA transcripts (0.8, 2.6, and 3.3 kb) were identified.
    • The 0.8 kb and 3.3 kb transcripts were present across developmental stages and unaffected by the forked mutations.
    • The 2.6 kb transcript, exclusively observed during the pupal stage, showed reduced abundance in all analyzed forked mutants.

    Conclusions:

    • The 2.6 kilobase RNA transcript, specifically expressed during pupal development, is likely the product of the forked gene.
    • The characterized DNA region and its transcripts provide molecular insight into the forked locus and its allelic variations.
    • This study contributes to the understanding of gene regulation and function in Drosophila development.