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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...

Transcription

Transcription

Transcription is the synthesis of RNA from a DNA sequence by RNA polymerase. It is the first step in producing a protein from a gene sequence. Additionally, many other proteins and regulatory sequences are involved in correctly synthesizing messenger RNA (mRNA). Transcriptional regulation is responsible for the differentiation of different types of cells and often for the proper cellular response to environmental signals.
Transcription Can Produce Different Kinds of RNA Molecules
In eukaryotes,...

Transcription

Transcription

Overview
Transcription is the process of synthesizing RNA from a DNA sequence by RNA polymerase. It is the first step in producing a protein from a gene sequence. Additionally, many other proteins and regulatory sequences are involved in the proper synthesis of messenger RNA (mRNA). Regulation of transcription is responsible for the differentiation of all the different types of cells and often for the proper cellular response to environmental signals.
Transcription Can Produce Different Kinds...

Covalently Linked Protein Regulators

Covalently Linked Protein Regulators

Proteins can undergo many types of post-translational modifications, often in response to changes in their environment. These modifications play an important role in the function and stability of these proteins. Covalently linked molecules include functional groups, such as methyl, acetyl, and phosphate groups, and also small proteins, such as ubiquitin. There are around 200 different types of covalent regulators that have been identified.
These groups modify specific amino acids in a protein....

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

Regulation of Expression Occurs at Multiple Steps

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Related Experiment Video

Updated: Dec 23, 2025

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

The role of SUMOylation during development.

Ana Talamillo¹, Orhi Barroso-Gomila¹, Immacolata Giordano¹

¹CIC bioGUNE, Basque Research and Technology Alliance (BRTA), Derio, Spain.

Biochemical Society Transactions

|April 21, 2020

Summary

SUMOylation, a key protein modification, regulates gene expression essential for animal embryonic development and organ formation. This process influences cell growth, differentiation, and morphogenesis across diverse species.

Keywords:

SUMO development ubiquitin

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Last Updated: Dec 23, 2025

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SUMO-Binding Entities SUBEs as Tools for the Enrichment, Isolation, Identification, and Characterization of the SUMO Proteome in Liver Cancer

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Published on: November 1, 2019

Area of Science:

Molecular Biology
Developmental Biology
Biochemistry

Background:

Transcriptional regulation is crucial for multicellular organism development, controlling cell growth, differentiation, and morphogenesis.
SUMOylation, a reversible post-translational modification, significantly impacts transcriptional regulation.
SUMOylation affects transcription factors and chromatin remodeling, influencing gene expression and cellular processes.

Purpose of the Study:

To review the role of SUMOylation machinery in embryonic development and organogenesis.
To explore the modification of target proteins by SUMOylation during animal development.
To provide insights into the conserved functions of SUMOylation across different animal species.

Main Methods:

Literature review of studies on SUMOylation in animal development.
Analysis of SUMOylation's impact on transcription factors and chromatin remodelers.
Examination of SUMOylation's effects on cellular processes like cell cycle and DNA repair.

Main Results:

SUMOylation modulates the activity, stability, and localization of its substrates.
SUMOylation is integral to processes including cell cycle progression, DNA repair, and nucleocytoplasmic transport.
The SUMO machinery and its target modifications are vital for embryonic development and organogenesis from invertebrates to mammals.

Conclusions:

SUMOylation is a fundamental mechanism regulating gene expression during animal development.
Understanding SUMOylation's role is key to comprehending developmental processes and potential disorders.
This review highlights the conserved importance of SUMOylation in shaping animal form and function.