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Related Concept Videos

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...
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...
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...
Pre-mRNA Processing: RNA Splicing01:32

Pre-mRNA Processing: 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...

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Detection of Alternative Splicing During Epithelial-Mesenchymal Transition
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DARPP-32 binds to tra2-beta1 and influences alternative splicing.

Natalya Benderska1, Kristina Becker, Jean-Antoine Girault

  • 1University of Erlangen-Nuremberg, Institute for Biochemistry, Fahrstrasse 17, 91054 Erlangen, Germany.

Biochimica Et Biophysica Acta
|January 16, 2010
PubMed
Summary

Dopamine and cAMP regulated phosphoprotein (DARPP-32) directly binds the splicing factor tra2-beta1. This interaction influences alternative splicing, linking cellular signaling to pre-mRNA processing.

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Area of Science:

  • Molecular Biology
  • RNA Biology
  • Neuroscience

Background:

  • Alternative splicing is a key mechanism for generating protein diversity, frequently dysregulated in disease.
  • DARPP-32 (dopamine and cAMP regulated phosphoprotein, 32kDa) is a crucial signaling protein in PKA-dependent pathways.
  • Splicing factors like tra2-beta1 play critical roles in regulating alternative splicing events.

Purpose of the Study:

  • To investigate the potential interaction between DARPP-32 and the splicing factor tra2-beta1.
  • To determine if DARPP-32 influences the alternative splicing activity of tra2-beta1.
  • To elucidate the molecular link between cellular signaling and pre-mRNA processing.

Main Methods:

  • Co-immunoprecipitation assays to detect protein-protein interactions.
  • In vitro splicing assays to assess the impact of DARPP-32 on tra2-beta1-dependent splicing.
  • Western blotting to analyze protein expression and modification.

Main Results:

  • Direct binding between DARPP-32 and tra2-beta1 was demonstrated.
  • DARPP-32 altered the usage of tra2-beta1-dependent alternative exons in a concentration-dependent manner.
  • The interaction suggests a novel regulatory mechanism in pre-mRNA processing.

Conclusions:

  • The DARPP-32:tra2-beta1 interaction serves as a molecular bridge connecting intracellular signaling pathways with the machinery of pre-mRNA splicing.
  • This finding reveals a new layer of gene expression regulation.
  • Understanding this interaction may offer insights into diseases associated with aberrant splicing and signaling.