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Related Experiment Video

Updated: Jun 28, 2026

CD Spectroscopy to Study DNA-Protein Interactions
06:48

CD Spectroscopy to Study DNA-Protein Interactions

Published on: February 10, 2022

YY1's longer DNA-binding motifs.

Jeong do Kim1, Joomyeong Kim

  • 1Department of Biological Sciences, Louisiana State University, Baton Rouge, LA 70803, USA.

Genomics
|October 28, 2008
PubMed
Summary
This summary is machine-generated.

The transcription factor YY1 recognizes longer DNA sequences than previously known, exhibiting higher binding affinity. Its DNA binding specificity relies on the concerted action of its zinc finger units.

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Area of Science:

  • Molecular Biology
  • Genetics
  • Biochemistry

Background:

  • The transcription factor Yin Yang 1 (YY1) is a crucial regulator involved in various cellular processes.
  • Previous studies identified a specific DNA-binding motif for YY1, but its full recognition capacity remained unclear.

Purpose of the Study:

  • To identify and characterize novel, potentially longer DNA-binding motifs for YY1.
  • To investigate the role of YY1's zinc finger domains in DNA sequence recognition.

Main Methods:

  • Gel shift assays were employed to assess DNA-protein interactions.
  • DNA-binding motif studies were conducted using wild-type and mutated YY1 proteins.

Main Results:

  • Two new, longer DNA-binding motifs for YY1 were identified in the Peg3 and Xist genes.
  • The newly identified longer motif (GCCGCCATTTTG) showed higher affinity for YY1 compared to the previously known motif (CGCCATnTT).
  • Mutations in the first zinc finger unit of YY1 weakened DNA-binding specificity, resulting in a shorter consensus motif (GCCAT).

Conclusions:

  • YY1 recognizes longer DNA sequences than previously established, with implications for gene regulation.
  • The integrity of the first zinc finger unit is essential for YY1's recognition of its extended DNA motif.
  • YY1 DNA binding specificity is achieved through the coordinated function of its zinc finger units, rather than independent contributions.