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Related Experiment Videos

Multiple protein-binding sites in the 5'-flanking region regulate c-fos expression.

M Z Gilman, R N Wilson, R A Weinberg

    Molecular and Cellular Biology
    |December 1, 1986
    PubMed
    Summary
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    Researchers identified three novel DNA-binding activities that regulate the mouse c-fos gene. These factors bind to specific DNA sequences, influencing both basal activity and serum-induced expression of the c-fos gene.

    Area of Science:

    • Molecular Biology
    • Genetics
    • Biochemistry

    Background:

    • The c-fos gene is a crucial proto-oncogene involved in cellular responses to growth factors.
    • Understanding the transcriptional regulation of c-fos is essential for deciphering cellular signaling pathways.
    • Specific DNA-protein interactions at the c-fos promoter are key to its gene expression control.

    Purpose of the Study:

    • To identify and characterize novel DNA-binding proteins that interact with regulatory regions of the mouse c-fos gene.
    • To determine the role of these DNA-protein complexes in both basal and induced c-fos transcription.

    Main Methods:

    • Nuclear extracts from mammalian cells were used to probe DNA sequences flanking the mouse c-fos gene.
    • Electrophoretic mobility shift assays (EMSA) or similar techniques were employed to detect DNA-protein complex formation.

    Related Experiment Videos

  • Analysis focused on regions critical for serum growth factor induction and basal promoter activity.

    • Main Results:

    • Three distinct sequence-specific DNA-protein complexes were detected.
    • One complex bound to a region critical for serum growth factor-induced c-fos expression.
    • Two additional complexes bound to sequences contributing to the basal promoter activity of c-fos in vivo.

    Conclusions:

    • The study identified three novel sequence-specific DNA-binding activities regulating the mouse c-fos gene.
    • These DNA-binding activities appear to play significant roles in controlling c-fos transcription initiation.
    • The findings provide new insights into the molecular mechanisms governing c-fos gene regulation.