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Reporter Genes02:11

Reporter Genes

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Reporter genes are a type of protein-coding gene that are often tagged to a gene of interest. Once inside a target cell, reporter genes usually produce visually identifiable characteristics like fluorescence and luminescence when expressed along with the gene of interest. Thus, reporter genes “report” the presence or absence of genes of interest in an organism, determine the gene expression pattern, or track the physical location of a DNA segment or protein in the cell.
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In vivo Neuronal Calcium Imaging in C. elegans
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An expanded GCaMP reporter toolkit for functional imaging in C. elegans.

Jimmy Ding1,2, Lucinda Peng1,2, Sihoon Moon1,3

  • 1These authors contributed equally.

Biorxiv : the Preprint Server for Biology
|March 22, 2023
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Summary

This study introduces new genetically encoded calcium indicators (GECIs) for C. elegans research. These advanced GCaMP reporters offer improved performance for studying neuronal activity and cellular functions.

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Area of Science:

  • Neuroscience and Cell Biology
  • Genetics and Molecular Biology

Background:

  • Calcium flux is crucial for cellular functions, particularly in neurons and myocytes.
  • Genetically encoded calcium indicators (GECIs), especially GCaMP derived from GFP, are vital for in vivo calcium imaging.
  • Recent GCaMP variants offer enhanced temporal dynamics and brightness but lack availability for C. elegans research.

Approach:

  • Developed and optimized a toolkit of GCaMP6 and jGCaMP7 reporters specifically for Caenorhabditis elegans.
  • Ensured reporters exhibit improved dynamic range, varied kinetics, and targeted subcellular localizations.
  • Validated the toolkit for routine use and specialized applications like high-speed imaging.

Key Points:

  • Introduced novel GCaMP6 and jGCaMP7 variants tailored for C. elegans.
  • Reporters provide enhanced dynamic range and kinetic properties for calcium imaging.
  • The toolkit supports diverse research needs, including fast imaging and low-cost platforms.

Conclusions:

  • This GECI toolkit significantly advances calcium imaging capabilities in C. elegans.
  • Optimized reporters facilitate detailed studies of neuronal and cellular dynamics.
  • The availability of these tools will accelerate neurophysiological and developmental research in C. elegans.