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Regulation of Expression Occurs at Multiple Steps

Regulation of Expression Occurs at Multiple Steps

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.
Transcription results in the generation of precursor (pre-mRNA) that consists of both exons and introns, which needs further processing before being translated to a...

Regulation of Expression Occurs at Multiple Steps

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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.
Transcription results in the generation of precursor (pre-mRNA) that consists of both exons and introns, which needs further processing before being translated to a...

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The gene expression in cells is regulated at different stages: (i) transcription, (ii) RNA processing, (iii) RNA localization, and (iv) translation. Transcriptional regulation is mediated by regulatory proteins such as transcription factors, activators, or repressors—these control gene expression by initiating or inhibiting the transcription of genes. Once a precursor or pre-mRNA is produced, it undergoes post-transcriptional modification, including 5' capping, splicing, and the addition of a...

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Related Experiment Video

Updated: Jul 2, 2026

In vivo Application of the REMOTE-control System for the Manipulation of Endogenous Gene Expression

In vivo Application of the REMOTE-control System for the Manipulation of Endogenous Gene Expression

Published on: March 29, 2019

Context-dependent regulation of Groucho/TLE-mediated repression.

Einat Cinnamon¹, Ze'ev Paroush

¹Department of Biochemistry, Faculty of Medicine, The Hebrew University, PO Box 12272, Jerusalem 91120, Israel. ecinnam@nimr.mrc.ac.uk

Current Opinion in Genetics & Development

|August 30, 2008

Summary

Groucho/TLE proteins, crucial for gene repression, are now known to have their activity modulated by external signals and cellular context, not just partner repressors.

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Area of Science:

Molecular Biology
Cellular Signaling
Gene Regulation

Background:

Groucho/TLE proteins function as global corepressors, recruited by DNA-binding repressors to target gene promoters.
Historically, their repression activity was thought to be regulated solely by the availability of partner repressors.
Recent findings indicate that Groucho/TLE activity is dynamically regulated in a signal- and context-dependent manner.

Purpose of the Study:

To review the multifaceted regulation of Groucho/TLE-mediated gene repression.
To highlight the distinct mechanisms controlling Groucho/TLE activity in various cellular signaling pathways.

Main Methods:

Literature review of studies on Groucho/TLE proteins and their regulatory mechanisms.
Analysis of different cell-signaling processes involving Groucho/TLE factors.
Discussion of repressor-specific properties influencing Groucho/TLE responses.

Main Results:

Groucho/TLE-mediated repression is regulated through three primary modes: partner repressor expression, competition with coactivators, and post-translational modifications of Groucho/TLE.
These regulatory modes are illustrated across diverse cell-signaling contexts.
The intrinsic characteristics of DNA-binding repressors contribute to differential regulation by Groucho/TLE.

Conclusions:

Groucho/TLE protein activity is not solely dependent on partner repressor distribution but is actively modulated by cellular signals and context.
Understanding these diverse regulatory mechanisms is crucial for comprehending gene expression control.
The interplay between Groucho/TLE proteins, repressors, and coactivators offers insights into complex cellular signaling networks.