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Related Concept Videos

RNA Splicing01:32

RNA Splicing

Splicing is the process by which eukaryotic RNA is edited before its translation into protein. The RNA strand transcribed from eukaryotic DNA is called the primary transcript. The primary transcripts that become mRNAs are called precursor messenger RNAs (pre-mRNAs). Eukaryotic pre-mRNA contains alternating sequences of exons and introns. Exons are nucleotide sequences that code for proteins, whereas introns are the non-coding regions. In RNA splicing, introns are removed and exons are bonded...
RNA Splicing01:32

RNA Splicing

Splicing is the process by which eukaryotic RNA is edited before its translation into protein. The RNA strand transcribed from eukaryotic DNA is called the primary transcript. The primary transcripts that become mRNAs are called precursor messenger RNAs (pre-mRNAs). Eukaryotic pre-mRNA contains alternating sequences of exons and introns. Exons are nucleotide sequences that code for proteins, whereas introns are the non-coding regions. In RNA splicing, introns are removed and exons are bonded...
Chromatin Structure Regulates pre-mRNA Processing02:41

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...
Additional Subnuclear Structures02:10

Additional Subnuclear Structures

The eukaryotic nucleus is a double membrane-bound organelle that contains nearly all of the cell’s genetic material in the form of chromosomes. It is rightly called the “brain” of the cell as it shoulders the responsibility of responding to various physiological processes, stress, altered metabolic conditions, and other cellular signals. 
The nucleus contains many membrane-less subnuclear organelles or nuclear bodies, such as nucleoli, Cajal bodies, speckles, paraspeckles, etc. These nuclear...
Additional Subnuclear Structures02:10

Additional Subnuclear Structures

The eukaryotic nucleus is a double membrane-bound organelle that contains nearly all of the cell’s genetic material in the form of chromosomes. It is rightly called the “brain” of the cell as it shoulders the responsibility of responding to various physiological processes, stress, altered metabolic conditions, and other cellular signals. 
The nucleus contains many membrane-less subnuclear organelles or nuclear bodies, such as nucleoli, Cajal bodies, speckles, paraspeckles, etc. These nuclear...
Alternative RNA Splicing02:18

Alternative RNA Splicing

Alternative RNA splicing is the regulated splicing of exons and introns to produce different mature mRNAs from a single pre-mRNA. Unlike in constitutive splicing where a single gene produces a single type of mRNA, alternative splicing allows an organism to produce multiple proteins from a single gene and plays an important role in protein diversity.
There are five types of alternative RNA splicing that vary in the ways the pre-mRNA segments are removed or retained in the mature mRNA. The first...

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Updated: Jul 6, 2026

A Reporter Based Cellular Assay for Monitoring Splicing Efficiency
08:53

A Reporter Based Cellular Assay for Monitoring Splicing Efficiency

Published on: September 15, 2021

Nuclear organization and splicing control.

Maria Carmo-Fonseca1, Célia Carvalho

  • 1Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, Portugal. carmo.fonseca@fm.ul.pt

Advances in Experimental Medicine and Biology
|April 3, 2008
PubMed
Summary
This summary is machine-generated.

Gene splicing is controlled by more than just RNA sequences. Nuclear organization and transcription speed also play key roles in regulating gene expression and splicing choices.

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Area of Science:

  • Molecular Biology
  • Genetics
  • Cell Biology

Background:

  • Splicing regulation traditionally focuses on cis-acting elements and protein binding on precursor messenger RNA (pre-mRNA).
  • However, other factors like transcription kinetics, RNA-binding protein loading, and nucleo-cytoplasmic transport influence splice site selection.
  • The eukaryotic nucleus's crowded environment creates specific microenvironments affecting molecular interactions essential for gene expression.

Purpose of the Study:

  • To explore the multifaceted regulatory mechanisms governing alternative splicing.
  • To investigate the impact of nuclear organization and transcription dynamics on splicing choices.
  • To highlight the role of spatial constraints within the nucleus in controlling gene expression.

Main Methods:

  • Review of current literature on splicing regulation.
  • Analysis of the interplay between transcription, nuclear architecture, and splicing.
  • Discussion of emerging technologies for studying gene expression in living cells.

Main Results:

  • Splicing decisions are influenced by a complex interplay of sequence-specific binding, transcription speed, and protein localization.
  • Nuclear organization can bring distant genomic regions together, facilitating coordinated transcription and splicing.
  • Spatial confinement within the nucleus actively shapes the efficiency and specificity of molecular interactions.

Conclusions:

  • Splicing regulation is a dynamic process influenced by both cis-acting elements and the broader nuclear context.
  • Understanding the spatial and kinetic aspects of gene expression is crucial for a complete picture of splicing control.
  • Advanced live-cell imaging techniques will be vital for further elucidating the role of spatial confinement in splicing.