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Related Concept Videos

RNA Splicing01:32

RNA Splicing

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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...
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Spindle assembly occurs through three, often coexisting, pathways – the centrosome-mediated pathway, the chromatin-mediated pathway, and the microtubule-mediated pathway – collectively contributing to form a robust spindle apparatus.
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Alternative RNA Splicing02:18

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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.
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Related Experiment Video

Updated: May 2, 2026

ACT1-CUP1 Assays Determine the Substrate-Specific Sensitivities of Spliceosomal Mutants in Budding Yeast
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Mechanisms of spliceosomal assembly.

Ni-Ting Chiou1, Kristen W Lynch

  • 1Department of Biochemistry and Biophysics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA.

Methods in Molecular Biology (Clifton, N.J.)
|February 20, 2014
PubMed
Summary

Pre-messenger RNA (mRNA) splicing is vital for creating mature mRNA. The spliceosome complex undergoes rearrangements during assembly, ensuring accurate splice site selection and offering regulatory control points.

Area of Science:

  • Molecular Biology
  • Gene Expression Regulation
  • RNA Processing

Background:

  • Pre-mRNA splicing is essential for producing functional mRNA.
  • The spliceosome, an RNA-protein complex, catalyzes splicing.
  • Assembly involves sequential rearrangements of intermediate complexes.

Purpose of the Study:

  • To overview spliceosome components.
  • To describe spliceosome rearrangements during assembly.
  • To highlight regulatory potential in splicing.

Main Methods:

  • Review of spliceosome assembly pathway.
  • Analysis of RNA-RNA, RNA-protein, and protein-protein interactions.
  • Examination of pre-spliceosomal intermediates.

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Main Results:

  • Spliceosome assembly involves dynamic rearrangements.
  • These rearrangements enhance splice site selection accuracy.
  • Multiple regulatory checkpoints exist during assembly.

Conclusions:

  • Spliceosome assembly is a complex, regulated process.
  • Understanding rearrangements is key to understanding splicing accuracy.
  • The pathway offers insights into gene expression regulation.