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Related Concept Videos

Transcription Factors02:16

Transcription Factors

Tissue-specific transcription factors contribute to diverse cellular functions in mammals. For example, the gene for beta globin, a major component of hemoglobin, is present in all cells of the body. However, it is only expressed in red blood cells because the transcription factors that can bind to the promoter sequences of the beta globin gene are only expressed in these cells. Tissue-specific transcription factors also ensure that mutations in these factors may impair only the function of...
Transcription Factors02:16

Transcription Factors

Tissue-specific transcription factors contribute to diverse cellular functions in mammals. For example, the gene for beta globin, a major component of hemoglobin, is present in all cells of the body. However, it is only expressed in red blood cells because the transcription factors that can bind to the promoter sequences of the beta globin gene are only expressed in these cells. Tissue-specific transcription factors also ensure that mutations in these factors may impair only the function of...
RNA Polymerase II Accessory Proteins02:36

RNA Polymerase II Accessory Proteins

Proteins that regulate transcription can do so either via direct contact with RNA Polymerase or through indirect interactions facilitated by adaptors, mediators, histone-modifying proteins, and nucleosome remodelers. Direct interactions to activate transcription is seen in bacteria as well as in some eukaryotic genes. In these cases, upstream activation sequences are adjacent to the promoters, and the activator proteins interact directly with the transcriptional machinery. For example, in...
Eukaryotic Transcription Activators02:42

Eukaryotic Transcription Activators

Transcription activators are proteins that promote the transcription of genes from DNA to RNA. In most cases, these proteins contain two separate domains ‒ a domain that binds to DNA and a domain for activating transcription; however, in some cases, a single domain is responsible for both binding and activation of transcription, as seen in the glucocorticoid receptor and MyoD.
The binding domains are capable of recognizing and interacting with regulatory sequences on the DNA. These domains are...
Cooperative Binding of Transcription Regulators02:13

Cooperative Binding of Transcription Regulators

Transcriptional regulators bind to specific cis-regulatory sequences in the DNA to regulate gene transcription. These cis-regulatory sequences are very short, usually less than ten nucleotide pairs in length. The short length means that there is a high probability of the exact same sequence randomly occurring throughout the genome.  Since regulators can also bind to groups of similar sequences, this further increases the chances of random binding. Transcriptional regulators form dimers that...
Cooperative Binding of Transcription Regulators02:13

Cooperative Binding of Transcription Regulators

Transcriptional regulators bind to specific cis-regulatory sequences in the DNA to regulate gene transcription. These cis-regulatory sequences are very short, usually less than ten nucleotide pairs in length. The short length means that there is a high probability of the exact same sequence randomly occurring throughout the genome.  Since regulators can also bind to groups of similar sequences, this further increases the chances of random binding. Transcriptional regulators form dimers that...

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Related Experiment Video

Updated: May 8, 2026

Measuring the Kinetics of mRNA Transcription in Single Living Cells
11:22

Measuring the Kinetics of mRNA Transcription in Single Living Cells

Published on: August 25, 2011

Quantifying transcription factor kinetics: at work or at play?

Florian Mueller1, Timothy J Stasevich, Davide Mazza

  • 1Institut Pasteur, Computational Imaging and Modeling Unit, CNRS , Paris , France .

Critical Reviews in Biochemistry and Molecular Biology
|September 13, 2013
PubMed
Summary

Understanding transcription factor (TF) binding kinetics in live cells is crucial. This study compares methods like FRAP and FCS, exploring how TF residence times impact gene regulation and cellular networks.

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High Sensitivity Measurement of Transcription Factor-DNA Binding Affinities by Competitive Titration Using Fluorescence Microscopy
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High Sensitivity Measurement of Transcription Factor-DNA Binding Affinities by Competitive Titration Using Fluorescence Microscopy

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Related Experiment Videos

Last Updated: May 8, 2026

Measuring the Kinetics of mRNA Transcription in Single Living Cells
11:22

Measuring the Kinetics of mRNA Transcription in Single Living Cells

Published on: August 25, 2011

Real-time Analysis of Transcription Factor Binding, Transcription, Translation, and Turnover to Display Global Events During Cellular Activation
12:54

Real-time Analysis of Transcription Factor Binding, Transcription, Translation, and Turnover to Display Global Events During Cellular Activation

Published on: March 7, 2018

High Sensitivity Measurement of Transcription Factor-DNA Binding Affinities by Competitive Titration Using Fluorescence Microscopy
06:38

High Sensitivity Measurement of Transcription Factor-DNA Binding Affinities by Competitive Titration Using Fluorescence Microscopy

Published on: February 7, 2019

Area of Science:

  • Molecular Biology
  • Cell Biology
  • Biophysics

Background:

  • Transcription factors (TFs) dynamically interact with chromatin binding sites in vivo.
  • Measuring the kinetics of these interactions in live cells is essential for understanding gene regulation.

Purpose of the Study:

  • To compare four key techniques for measuring TF-chromatin interaction kinetics in live cells.
  • To explore the biological significance of TF residence times in gene regulation and cellular networks.

Main Methods:

  • Fluorescence Recovery After Photobleaching (FRAP)
  • Fluorescence Correlation Spectroscopy (FCS)
  • Single Molecule Tracking (SMT)
  • Competition ChIP (CC)

Main Results:

  • Comparison of FRAP, FCS, SMT, and CC techniques highlights their principles, advantages, and disadvantages.
  • Data suggests TF residence times are tightly regulated and modulate transcriptional output.
  • TF residence times influence promoter occupancy and the functional status of cellular gene networks.

Conclusions:

  • TF residence times are critical parameters influencing transcription through site-specific regulation and global network effects.
  • Distinguishing between functional and non-specific TF binding is key to understanding gene regulation.
  • Further research is needed to resolve key biological questions regarding TF binding dynamics and functionality.