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Related Experiment Videos

Sequence requirements for estrogen receptor binding to estrogen response elements

M D Driscoll1, G Sathya, M Muyan

  • 1Department of Biochemistry and Biophysics and the University of Rochester Cancer Center, The University of Rochester School of Medicine and Dentistry, Rochester, New York 14642, USA.

The Journal of Biological Chemistry
|October 29, 1998
PubMed
Summary
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Estrogen receptor (ER) binding to DNA is complex. Even minor changes in estrogen response elements (EREs) can prevent binding, but flanking sequences can restore it, enabling prediction of ER-ERE interactions.

Area of Science:

  • Molecular Biology
  • Genetics
  • Biochemistry

Background:

  • Estrogen receptor (ER) is a key transcription factor regulating gene expression.
  • Estrogen response elements (EREs) are DNA sequences that ER binds to.
  • Natural EREs often deviate from the consensus sequence, featuring imperfect repeats.

Purpose of the Study:

  • To define the fundamental sequence requirements for ER binding to EREs.
  • To investigate why natural EREs exhibit variations from the consensus sequence.
  • To understand the role of flanking sequences in ER-ERE interactions.

Main Methods:

  • Assessed ER binding to various nonconsensus EREs.
  • Analyzed the impact of sequence variations within EREs.
  • Evaluated the influence of flanking DNA sequences on ER-ERE binding affinity.

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Main Results:

  • A single deviation from the consensus ERE sequence can abolish ER binding.
  • ERE s with two consensus changes can bind ER strongly, depending on flanking sequences.
  • Flanking sequences significantly modulate ER-ERE binding affinity, either enhancing or diminishing it.

Conclusions:

  • Estrogen receptor binding is sensitive to ERE sequence and context.
  • Flanking sequences play a critical role in determining ER binding to natural EREs.
  • Developed predictive rules for ER binding to natural EREs based on sequence analysis.