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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...
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Gene transcription is regulated by the synergistic action of several proteins that form a complex at a gene regulatory site. This is observed in eukaryotes, where the regulation of gene expression is a complex process. Regulatory proteins in eukaryotes can broadly be classified into two types – regulators that bind directly to specific DNA sequences and co-regulators that associate with regulatory proteins but cannot directly bind to the DNA. These co-regulators are further divided into...
Regulation of Expression Occurs at Multiple Steps02:24

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Gene expression can be regulated at almost every step from gene to protein. Transcription is the step that is most commonly regulated. This involves the binding of proteins to short regulatory sequences on the DNA. This association can either promote or inhibit the transcription of a gene associated with the respective sequence.
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Gene transcription is regulated by the synergistic action of several proteins that form a complex at a gene regulatory site. This is observed in eukaryotes, where the regulation of gene expression is a complex process. Regulatory proteins in eukaryotes can broadly be classified into two types – regulators that bind directly to specific DNA sequences and co-regulators that associate with regulatory proteins but cannot directly bind to the DNA. These co-regulators are further divided into...
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Real-time Analysis of Transcription Factor Binding, Transcription, Translation, and Turnover to Display Global Events During Cellular Activation
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Published on: March 7, 2018

Crossing the line between activation and repression.

Jun Ma1

  • 1Division of Developmental Biology, Cincinnati Children's Hospital Research Foundation, University of Cincinnati College of Medicine, 3333 Burnet Avenue, Cincinnati, OH 45229, USA. jun.ma@cchmc.org

Trends in Genetics : TIG
|February 1, 2005
PubMed
Summary
This summary is machine-generated.

Gene transcription involves proteins that activate or repress gene expression. New research reveals proteins can switch roles, highlighting dynamic regulation and protein communication in gene control.

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Last Updated: Jun 29, 2026

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12:54

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Area of Science:

  • Molecular Biology
  • Genetics
  • Biochemistry

Background:

  • Gene transcription is a fundamental biological process.
  • Transcriptional regulation is controlled by activators, co-activators, repressors, and co-repressors.
  • These proteins determine whether gene expression is activated or repressed.

Purpose of the Study:

  • To discuss the dynamic nature of transcriptional regulation.
  • To highlight the dual roles of proteins in gene regulation.
  • To emphasize the importance of protein communication in gene transcription.

Main Methods:

  • Review of recent scientific literature.
  • Analysis of selected examples of protein interactions.
  • Discussion of regulatory mechanisms in gene transcription.

Main Results:

  • Many proteins exhibit regulatory activities that span both activation and repression.
  • Individual proteins play crucial roles in transcriptional control.
  • Protein communication systems are vital for effective gene regulation.

Conclusions:

  • Transcriptional regulation is a dynamic process.
  • Proteins can function dynamically, crossing the activation-repression divide.
  • Interplay and communication among regulatory proteins are essential for precise gene expression control.