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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 and RNA Splicing02:41

Chromatin Structure and RNA Splicing

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...
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...
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...
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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Related Experiment Video

Updated: Jun 3, 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

Spliceosome structure and function.

Cindy L Will1, Reinhard Lührmann

  • 1Max Planck Institute for Biophysical Chemistry, Department of Cellular Biochemistry, Am Fassberg 11, 37077 Göttingen, Germany.

Cold Spring Harbor Perspectives in Biology
|March 29, 2011
PubMed
Summary
This summary is machine-generated.

The spliceosome, a complex molecular machine, precisely splices pre-messenger RNA (mRNA) through dynamic RNA-protein interactions. High-resolution structures are needed to fully understand its catalytic active site.

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Area of Science:

  • Molecular Biology
  • Structural Biology
  • Biochemistry

Background:

  • Pre-mRNA splicing is essential for gene expression, catalyzed by the spliceosome, a large ribonucleoprotein (RNP) complex.
  • The spliceosome's dynamic nature and complex composition, involving snRNPs and proteins, pose challenges for structural determination.
  • Understanding spliceosome dynamics is crucial for its accuracy and flexibility in splicing, conserved across species.

Purpose of the Study:

  • To summarize the current understanding of spliceosome structure and dynamics.
  • To highlight the challenges in obtaining high-resolution structural data of the spliceosome.
  • To emphasize the need for further structural studies to elucidate the spliceosome's active site.

Main Methods:

  • Review of existing structural data from electron microscopy, X-ray crystallography, and NMR spectroscopy.
  • Analysis of the interplay between RNA and proteins within the spliceosome.
  • Discussion of the dynamic rearrangements during spliceosome assembly and catalysis.

Main Results:

  • Electron microscopy provides insights into spliceosome morphology and component arrangement.
  • X-ray and NMR studies offer high-resolution structures of individual components and sub-complexes.
  • The spliceosome functions as an RNP enzyme due to extensive RNA-protein interactions.

Conclusions:

  • The spliceosome is a dynamic RNP enzyme critical for pre-mRNA splicing.
  • Current structural methods have limitations in capturing the complete, high-resolution structure of the active spliceosome.
  • Further high-resolution structural studies of the spliceosome's RNP core are necessary to fully understand its catalytic mechanism.