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Related Experiment Video

Updated: May 3, 2026

Large-scale Zebrafish Embryonic Heart Dissection for Transcriptional Analysis

Large-scale Zebrafish Embryonic Heart Dissection for Transcriptional Analysis

Published on: January 12, 2015

Minor class splicing shapes the zebrafish transcriptome during development.

Sebastian Markmiller¹, Nicole Cloonan, Rea M Lardelli

¹Ludwig Institute for Cancer Research, Melbourne-Parkville Branch, Parkville, VIC 3050, Australia.

Proceedings of the National Academy of Sciences of the United States of America

|February 12, 2014

Summary

This summary is machine-generated.

A zebrafish mutant reveals that defects in U12-type splicing disrupt mRNA processing, impacting cell growth and proliferation during development. This study highlights the critical role of efficient mRNA processing in vertebrate development.

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Area of Science:

Molecular Biology
Genetics
Developmental Biology

Background:

Minor class or U12-type splicing removes a small fraction of introns from human pre-mRNAs.
Defects in U12-type splicing are linked to Taybi-Linder syndrome and Peutz-Jeghers syndrome.
The transcriptome-wide impact of impaired U12-type splicing is currently unknown.

Purpose of the Study:

To investigate the impact of impaired U12-type splicing on the transcriptome in vivo.
To characterize a novel zebrafish mutant affecting U12-type splicing.

Main Methods:

Generated a zebrafish mutant (caliban, clbn) with a mutation in the rnpc3 gene.
Utilized RNA sequencing and microarrays to analyze the transcriptome of the clbn mutant.
Assessed the biochemical impact of the mutation on U11- and U12-containing small nuclear ribonucleoproteins.

Main Results:

The clbn mutant exhibits arrested digestive organ development due to impaired U12-type splicing.
Aberrant U11- and U12-containing small nuclear ribonucleoproteins were formed in clbn mutants.
Multiple genes involved in mRNA processing (transcription, splicing, nuclear export) were disrupted in clbn mutants, showing intron retention or differential gene expression.

Conclusions:

The caliban zebrafish mutant serves as a valuable model for studying aberrant U12-type splicing in vivo.
Efficient mRNA processing is crucial for cell growth, proliferation, and overall vertebrate development.