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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...

Translational Regulation

Translational Regulation

Translational regulation in prokaryotes ensures efficient protein synthesis by controlling ribosome access to mRNA. This regulation is mediated by secondary RNA structures, including translational riboswitches, RNA thermometers, and small RNAs (sRNAs), which respond to intracellular and environmental signals to modulate gene expression.Translational RiboswitchesRiboswitches in the leader region of mRNAs can regulate translation by altering the accessibility of the Shine-Dalgarno (SD) sequence,...

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

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...

What is Gene Expression?

What is Gene Expression?

A gene is a stretch of DNA that serves as the blueprint for functional RNAs and proteins. Since DNA is comprised of nucleotides and proteins are comprised of amino acids, a mediator is required to convert the information encoded in DNA into proteins. This mediator is the messenger RNA (mRNA). mRNA copies the blueprint from DNA by a process called transcription. In eukaryotes, transcription occurs in the nucleus by complementary base-pairing with the DNA template. The mRNA is then processed and...

What is Gene Expression?

What is Gene Expression?

Overview
Gene expression is the process in which DNA directs the synthesis of functional products, that is, proteins. Cells can regulate gene expression at various stages. It allows organisms to generate different cell types and enables cells to adapt to internal and external factors.
Genetic Information Flows from DNA to RNA to Protein
A gene is a stretch of DNA that serves as the blueprint for functional RNAs and proteins. Since DNA is made up of nucleotides and proteins consist of amino...

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Related Experiment Video

Updated: May 24, 2026

Polysome Fractionation and Analysis of Mammalian Translatomes on a Genome-wide Scale

Polysome Fractionation and Analysis of Mammalian Translatomes on a Genome-wide Scale

Published on: May 17, 2014

Translational regulation in nutrigenomics.

Botao Liu¹, Shu-Bing Qian

¹Graduate Field of Genetics and Development, Division of Nutritional Sciences, Cornell University, Ithaca, NY 14853, USA.

Advances in Nutrition (Bethesda, Md.)

|February 15, 2012

Summary

This summary is machine-generated.

Nutrigenomics explores how nutrients affect gene expression. This study reviews how nutrient signaling influences mRNA translation and protein production, offering insights into aging and cancer.

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Area of Science:

Genomics and molecular biology
Nutritional science
Cellular biology

Background:

Genome-wide analyses have transformed the study of cellular homeostasis.
Nutrigenomics investigates nutrient effects on gene expression, clarifying dietary component activity.
mRNA translation is crucial for gene expression and proteome determination, especially under nutrient stress.

Purpose of the Study:

To review recent advances in understanding translational control and nutrient signaling.
To explore the dysregulation of translational control and nutrient signaling in aging and cancer.
To highlight the potential of understanding translational regulation for identifying dietary and therapeutic targets.

Main Methods:

Review of current literature on translational control, nutrient signaling, and their roles in aging and cancer.
Analysis of the concept of translational reprogramming in maintaining protein expression under pathophysiological conditions.
Synthesis of knowledge regarding the impact of nutrient conditions on global translational regulation.

Main Results:

Emerging evidence shows nutrient signaling significantly influences global translational control.
Translational reprogramming is a key mechanism for maintaining specific protein expression during disease.
Dysregulation of translational control and nutrient signaling is implicated in aging and cancer pathogenesis.

Conclusions:

Understanding translational regulation in response to nutrient conditions is vital for human health.
Mechanistic insights may lead to novel dietary and therapeutic strategies for age-related diseases and cancer.
Further research into the interplay between nutrients, translation, and cellular homeostasis is warranted.