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Related Experiment Videos

CAAT/enhancer binding protein is able to bind to ATF/CRE elements.

O Bakker1, M G Parker

  • 1Molecular Endocrinology Laboratory, Imperial Cancer Research Fund, London, UK.

Nucleic Acids Research
|March 25, 1991
PubMed
Summary
This summary is machine-generated.

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The transcription factor C/EBP binds to ATF/CRE sites, similar to enhancer core elements. This binding enables C/EBP to direct gene transcription, with mutations affecting binding also impacting transcriptional activity.

Area of Science:

  • Molecular Biology
  • Transcription Factor Regulation
  • Gene Expression

Background:

  • CCAAT/enhancer-binding proteins (C/EBP) are transcription factors known to bind CAAT-box and viral enhancer elements.
  • The binding capabilities and transcriptional roles of C/EBP at specific DNA sequences are areas of ongoing research.

Purpose of the Study:

  • To investigate the binding affinity of C/EBP to ATF/CRE sites.
  • To determine if C/EBP can functionally regulate transcription via ATF/CRE sites.
  • To elucidate the mechanism by which C/EBP interacts with ATF/CRE sites.

Main Methods:

  • Electrophoretic mobility shift assays (band-shift assays) to assess DNA-protein binding.
  • Methylation interference assays to identify key DNA-binding contacts.

Related Experiment Videos

  • DNase I footprinting to map protein binding sites.
  • Transient transfection assays to evaluate transcriptional activity.
  • Main Results:

    • C/EBP exhibits high-affinity binding to ATF/CRE sites.
    • Homology between ATF/CRE sites and enhancer core elements may facilitate C/EBP binding.
    • C/EBP successfully directs transcription from ATF/CRE sites in reporter gene assays.
    • Impairment of DNA binding at mutated ATF sites correlates with reduced C/EBP-mediated transcriptional activation.

    Conclusions:

    • C/EBP possesses a broader DNA-binding specificity than previously recognized, including ATF/CRE sites.
    • The interaction of C/EBP with ATF/CRE sites is functionally significant for gene transcription.
    • Structural similarities between binding sites underpin C/EBP's versatile DNA recognition and regulatory functions.