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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 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...

Combinatorial Gene Control

Combinatorial Gene Control

Combinatorial gene control is the synergistic action of several transcriptional factors to regulate the expression of a single gene. The absence of one or more of these factors may lead to a significant difference in the level of gene expression or repression.
The expression of more than 30,000 genes is controlled by approximately 2000-3000 transcription factors. This is possible because a single transcription factor can recognize more than one regulatory sequence. The specificity in gene...

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...

Embryonic Stem Cells

Embryonic Stem Cells

Embryonic stem (ES) cells were first discovered in mice in 1981 by Martin Evans. In 1998, James Thomson identified a method to isolate embryonic stem cells from humans. Human embryonic stem cells (hESCs) are obtained from 3-5 day old embryos that remain unused after an in vitro fertilization procedure.
ES cells are grown in a culture medium where they can divide indefinitely, creating ES cell lines. Under certain conditions, ES cells can differentiate, either spontaneously into a variety of...

Embryonic Stem Cells

Embryonic Stem Cells

Embryonic stem (ES) cells are undifferentiated pluripotent cells, meaning they can produce any cell type in the body. This gives them tremendous potential in science and medicine since they can generate specific cell types for use in research or to replace body cells lost due to damage or disease.

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Related Experiment Video

Updated: Jul 5, 2026

Analysis of Translation in the Developing Mouse Brain using Polysome Profiling

Analysis of Translation in the Developing Mouse Brain using Polysome Profiling

Published on: May 22, 2021

Translational control: a new dimension in embryonic stem cell network analysis.

Wing Y Chang¹, William L Stanford

¹Institute of Biomaterials and Biomedical Engineering, University of Toronto, Toronto, ON M5S 3G9, Canada.

|May 9, 2008

Summary

Translation is differentially controlled in embryonic stem cells (ESCs). This study reveals distinct translational regulation in undifferentiated versus differentiated ESCs, impacting cell function.

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Area of Science:

* Stem cell biology
* Molecular and systems biology
* Gene expression regulation

Background:

* Systems biology approaches have identified key transcriptional networks and proteomic signatures essential for embryonic stem cell (ESC) function.
* Previous research focused on transcriptional and post-transcriptional regulatory mechanisms in ESCs.
* Understanding the full spectrum of regulatory control in ESCs is crucial for developmental biology and regenerative medicine.

Discussion:

* The study by Sampath et al. (2008) highlights the significance of translational control in ESCs.
* Differential control of translation occurs between undifferentiated and differentiated ESC states.
* This adds another layer of complexity to the regulatory networks governing ESC pluripotency and differentiation.

Key Insights:

* Translational regulation is a critical, yet underappreciated, mechanism in ESCs.
* Specific patterns of protein synthesis differ between pluripotent and differentiated ESCs.
* These differences in translation contribute to maintaining ESC identity and facilitating differentiation processes.

Outlook:

* Further investigation into specific translation factors and their targets in ESCs is warranted.
* Targeting translational control could offer new strategies for stem cell differentiation and therapeutic applications.
* This research opens new avenues for exploring post-transcriptional regulation in stem cell biology.