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Related Concept Videos

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Genetic screens are tools used to identify genes and mutations responsible for phenotypes of interest. Genetic screens help identify individuals or a group of people at risk of developing  genetic diseases and help them with early intervention, targeted therapy, and reproductive options.
Forward genetic screens
Forward or “classical” genetic screens involve creating random mutations in an organism’s DNA using radiation, mutagens, or insertion of additional bases, which...
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Gene Trapping Using Gal4 in Zebrafish
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Building the vertebrate codex using the gene breaking protein trap library.

Noriko Ichino1, MaKayla R Serres1, Rhianna M Urban1

  • 1Department of Biochemistry and Molecular Biology, Mayo Clinic, Rochester, United States.

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Summary

Researchers developed 1200 transgenic zebrafish using gene-break transposon (GBT) protein traps to study gene function and knockdown. This tool reveals new gene expression patterns and aids in understanding human disease mechanisms.

Keywords:
developmental biologydisease modelgene reversiongene-break transposonhuman genetic disorderslight sheet microscopyprotein trapzebrafish

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Area of Science:

  • Genomics
  • Molecular Biology
  • Zebrafish Models

Background:

  • Significant portions of the human genome remain under-characterized.
  • Understanding gene function is crucial for deciphering biological processes and diseases.

Purpose of the Study:

  • To develop a novel system for functional genome annotation.
  • To simultaneously report and knockdown gene expression in zebrafish.
  • To identify new models for human genetic diseases.

Main Methods:

  • Utilized the gene-break transposon (GBT) protein trap system.
  • Generated 1200 transgenic zebrafish strains.
  • Assessed gene expression via mRFP and gene-specific mRNA knockdown.
  • Phenotyped homozygous GBT animals for specific genes.

Main Results:

  • Discovered previously undocumented expression for 35% of genes at 2 days post-fertilization and 90% at 4 days.
  • Achieved 99% gene-specific mRNA knockdown.
  • Validated GBT lines by phenocopying known mutants (ryr1b, fras1, tnnt2a, edar, hmcn1).
  • Identified 64 orthologs of human disease genes, with 40 potential new disease models.
  • Demonstrated the system's utility in exploring genetic disease mechanisms (e.g., reduced Ca2+ transients in ry r1b mutants).

Conclusions:

  • The GBT protein trap system is an effective tool for functional genome annotation in vertebrates.
  • This system accelerates the discovery of gene function and identification of novel disease models.
  • Facilitates deeper understanding of the molecular underpinnings of vertebrate biology and human diseases.