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High Sensitivity Measurement of Transcription Factor-DNA Binding Affinities by Competitive Titration Using Fluorescence Microscopy
Published on: February 7, 2019
Mechanisms of transcription factor selectivity
Yongping Pan1, Chung-Jung Tsai, Buyong Ma
1Basic Science Program, SAIC-Frederick, Inc., Center for Cancer Research Nanobiology Program, NCI-Frederick, Frederick, MD 21702, USA.
Trends in Genetics : TIG
|January 16, 2010
Summary
Transcription factors (TFs) achieve specific DNA binding through cellular networks, dynamic protein-DNA interactions, and cooperative binding. This understanding refines how transcription initiation is regulated.
Area of Science:
- Molecular Biology
- Genomics
- Structural Biology
Background:
- Transcription initiation is regulated by transcription factors (TFs) binding to specific DNA response elements (REs).
- Understanding how TFs achieve sequence specificity among numerous similar genomic sites is a key question.
- Factors like nucleotide variation, prior binding events, and site availability influence TF selectivity.
Purpose of the Study:
- To investigate the mechanisms underlying transcription factor-DNA interaction specificity.
- To integrate structural insights with genomics data to explain TF binding selectivity.
- To classify TF recognition mechanisms based on key influencing factors.
Main Methods:
- Combining structural biology insights with recent genomics screens.
- Analyzing TF-DNA interactions in the context of cellular networks.
- Investigating protein and DNA as dynamic conformational ensembles.
- Examining the role of multiple TF and coregulator packing on regulatory DNA.
Main Results:
- TF-DNA interaction specificity is governed by a complex interplay of factors.
- Cellular networks, dynamic protein-DNA conformations, and cooperative binding are crucial.
- These elements collectively contribute to selective recognition of binding sites.
Conclusions:
- The regulation of transcription initiation is better understood through a multi-faceted view of TF-DNA recognition.
- A new classification of TF recognition mechanisms emerges from these integrated insights.
- This framework advances our comprehension of gene expression control.
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