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Regulation of Expression at Multiple Steps

Regulation of Expression at Multiple Steps

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: May 12, 2026

In Vitro SUMOylation Assay to Study SUMO E3 Ligase Activity

In Vitro SUMOylation Assay to Study SUMO E3 Ligase Activity

Published on: January 29, 2018

Multiple crosstalks between mRNA biogenesis and SUMO.

Jérôme O Rouvière¹, Marie-Claude Geoffroy, Benoit Palancade

¹Institut Jacques Monod, CNRS, UMR 7592, Univ Paris Diderot, Sorbonne Paris Cité, 75205, Paris, France.

|April 16, 2013

Summary

The small ubiquitin-like modifier SUMO regulates messenger RNA (mRNA) metabolism, impacting transcription, processing, and export. SUMOylation controls the function and localization of mRNA-processing factors, highlighting its crucial role in gene expression regulation.

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Area of Science:

Molecular Biology
Cell Biology
Biochemistry

Background:

mRNA metabolism encompasses transcription, processing (capping, splicing, polyadenylation), and quality control, forming messenger ribonucleoparticles (mRNPs) for cytoplasmic translation.
Regulatory mechanisms control mRNA production in response to environmental or physiological cues.
Post-translational modification by the small ubiquitin-like modifier SUMO is increasingly recognized for its role in cellular processes.

Purpose of the Study:

To investigate the role of SUMOylation in nuclear mRNA metabolism.
To elucidate how SUMOylation affects the function and targeting of mRNA biogenesis factors.

Main Methods:

Analysis of SUMO proteomes.
Functional validation of sumoylated targets.
Investigating the impact of SUMOylation on protein-protein and protein-nucleic acid interactions.

Main Results:

SUMOylation significantly contributes to nuclear mRNA metabolism.
SUMOylation of transcriptional regulators affects their DNA binding and association with chromatin modifiers.
Emerging evidence shows SUMO's role beyond transcription, influencing other mRNA biogenesis stages.
SUMOylation modifies mRNA metabolism factors' subnuclear localization and biological activity.

Conclusions:

SUMOylation is a key regulatory mechanism in nuclear mRNA metabolism.
SUMOylation influences mRNA biogenesis by modulating the activity and interactions of key factors.
The interplay between mRNA metabolism and SUMOylation represents a critical regulatory network in cellular processes.