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Exon Recombination02:32

Exon Recombination

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The evolution of new genes is critical for speciation. Exon recombination, also known as exon shuffling or domain shuffling, is an important means of new gene formation. It is observed across vertebrates, invertebrates, and in some plants such as potatoes and sunflowers. During exon recombination, exons from the same or different genes recombine and produce new exon-intron combinations, which might evolve into new genes. 
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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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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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The seminal work of Ohno in 1970 popularized the idea of gene duplication and divergence. DNA sequence comparison studies reveal that a large portion of the genes in bacteria, archaebacteria, and eukaryotes was  generated by gene duplication and divergence, indicating its critical role in evolution.
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Updated: Nov 9, 2025

Identification of Alternative Splicing and Polyadenylation in RNA-seq Data
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Identification of Alternative Splicing and Polyadenylation in RNA-seq Data

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Streamlining differential exon and 3' UTR usage with diffUTR.

Stefan Gerber1,2, Gerhard Schratt2, Pierre-Luc Germain3,4,5

  • 1Group of Computational Neurogenomics, D-HEST Institute for Neurosciences, ETH Zürich, Winterthurerstrasse 190, 8057, Zurich, Switzerland.

BMC Bioinformatics
|April 14, 2021
PubMed
Summary
This summary is machine-generated.

A new tool, diffUTR, enhances the analysis of differential 3' untranslated region (UTR) usage from standard transcriptomic data. This method improves upon existing differential exon usage (DEU) analyses for better biological insights.

Keywords:
Alternative poly-adenylationAlternative splicingDifferential exon usageGene expressionRNAseqTranscriptomicUTRUntranslated region

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Area of Science:

  • Bioinformatics
  • Computational Biology
  • Genomics

Background:

  • Alternative poly-adenylation and 3' UTR length are crucial for biological processes.
  • Current transcriptomic data analysis methods have limitations in detecting 3' UTR changes.

Purpose of the Study:

  • To introduce the diffUTR Bioconductor package for differential 3' UTR usage analysis.
  • To improve upon and streamline differential exon usage (DEU) analyses.

Main Methods:

  • Leveraging existing DEU tools and alternative poly-adenylation site databases.
  • Developing the diffUTR Bioconductor package for enhanced analysis.

Main Results:

  • diffUTR demonstrates greater flexibility and accuracy compared to current state-of-the-art methods.
  • Validation performed through both simulations and real biological data.

Conclusions:

  • diffUTR facilitates differential 3' UTR analysis.
  • The package broadly supports DEU analysis and the exploration of associated results.