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Regulated mRNA Transport

Regulated mRNA Transport

In eukaryotes, transcription and translation are compartmentalized; an mRNA is first synthesized in the nucleus and then selectively transported to the cytoplasm for protein synthesis. Before transport, a pre-mRNA undergoes several steps of post-transcriptional modifications including splicing, 5' capping, and the addition of a poly-adenine tail. Various proteins bind to the pre-mRNA during these modifications. The mRNA transport takes place with the help of multiple proteins playing specific...

Regulated mRNA Transport

Regulated mRNA Transport

In eukaryotes, transcription and translation are compartmentalized; an mRNA is first synthesized in the nucleus and then selectively transported to the cytoplasm for protein synthesis. Before transport, a pre-mRNA undergoes several steps of post-transcriptional modifications including splicing, 5' capping, and the addition of a poly-adenine tail. Various proteins bind to the pre-mRNA during these modifications. The mRNA transport takes place with the help of multiple proteins playing specific...

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...

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 Nuclear Protein Sorting

Regulation of Nuclear Protein Sorting

Nuclear protein sorting regulates nucleus composition and gene expression, crucial for determining the fate of a eukaryotic cell. Hence, the entry and exit of molecules across the nuclear envelope is a tightly controlled process. Nuclear protein sorting can be inhibited by one of the following ways: 1) masking cargo signal sequences, 2) modifying the nuclear receptor's affinity for cargo, 3) controlling the nuclear pore size, 4) retaining the cargo during its transit to the cytosol or the...

Chromatin Structure Regulates pre-mRNA Processing

Chromatin Structure Regulates pre-mRNA Processing

In eukaryotic cells, nascent mRNA transcripts need to undergo many post-transcriptional modifications to reach the cell cytoplasm and translate into functional proteins. For a long time, transcription and pre-mRNA processing were considered two independent events that occur sequentially in the cell. However, it has now been well established that transcription and pre-mRNA processing are two simultaneous processes that are precisely regulated inside the cell.
The chromatin structure, especially...

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Updated: May 28, 2026

Visualization of Endoplasmic Reticulum Localized mRNAs in Mammalian Cells

Visualization of Endoplasmic Reticulum Localized mRNAs in Mammalian Cells

Published on: December 17, 2012

Control of cytoplasmic mRNA localization.

Karen Shahbabian¹, Pascal Chartrand

¹Department of Biochemistry, Université de Montréal, 2900 Edouard-Montpetit, Montréal, Qc, Canada.

Cellular and Molecular Life Sciences : CMLS

|October 11, 2011

Summary

Messenger RNA (mRNA) localization ensures proteins are made in the right place and time. This review covers cytoplasmic mRNA localization mechanisms and their regulatory elements.

Area of Science:

Molecular Biology
Cell Biology
Genetics

Background:

mRNA localization is crucial for spatial and temporal protein synthesis in various organisms.
This process involves intricate regulation by cis- and trans-acting elements.
Understanding these elements is key to controlling gene expression.

Purpose of the Study:

To review the diverse mechanisms of mRNA localization.
To focus on the regulatory control of cytoplasmic mRNA localization.

Main Methods:

Literature review of mRNA localization studies.
Analysis of cis- and trans-acting elements involved in mRNA transport.
Examination of RNA-binding protein interactions.

Main Results:

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Last Updated: May 28, 2026

Visualization of Endoplasmic Reticulum Localized mRNAs in Mammalian Cells

Visualization of Endoplasmic Reticulum Localized mRNAs in Mammalian Cells

Published on: December 17, 2012

Production of Xenopus tropicalis Egg Extracts to Identify Microtubule-associated RNAs

Production of Xenopus tropicalis Egg Extracts to Identify Microtubule-associated RNAs

Published on: June 27, 2013

Isolation of mRNAs Associated with Yeast Mitochondria to Study Mechanisms of Localized Translation

Isolation of mRNAs Associated with Yeast Mitochondria to Study Mechanisms of Localized Translation

Published on: March 14, 2014

Identified multiple regulatory mechanisms governing mRNA localization.
Detailed the role of localization elements and RNA-binding proteins.
Highlighted the journey of mRNA from nucleus to destination.

Conclusions:

mRNA localization is a tightly controlled process essential for cellular function.
Cytoplasmic regulatory mechanisms play a significant role in directing mRNA.
Further research into these mechanisms can offer insights into gene regulation.