Expanded FLP toolbox for spatiotemporal protein degradation and transcriptomic profiling in Caenorhabditis elegans
Adrián Fragoso-Luna1, Raquel Romero-Bueno1, Michael Eibl1
1Andalusian Centre for Developmental Biology, Consejo Superior de Investigaciones Científicas (CSIC), Universidad Pablo de Olavide, Junta de Andalucía, 41013 Sevilla, Spain.
Genetics
|November 2, 2022
Summary
Researchers developed new FLP tools for precise gene control in the nematode Caenorhabditis elegans. These tools enable targeted gene knockout, protein degradation, and tissue-specific transcriptomic profiling for advanced gene function studies.
Area of Science:
- Genetics and Molecular Biology
- Developmental Biology
- Nematode Research
Background:
- Precise control of gene expression in specific tissues and developmental stages is crucial for studying gene function.
- Site-specific genome recombination using flippase (FLP) and cyclization recombination (Cre) enzymes is a powerful tool for this purpose.
- Existing FLP and Cre tools in Caenorhabditis elegans (C. elegans) have enabled gene expression regulation in various tissues.
Purpose of the Study:
- To expand the FLP toolkit with new lines for recombination in specific C. elegans tissues: distal tip cells, somatic gonad, coelomocytes, and the epithelial P lineage.
- To develop a system for spatiotemporally regulated degradation of proteins to overcome issues with long-lived proteins after gene knockout.
- To adapt FLP-mediated recombination for tissue-specific transcriptomic profiling using RNA polymerase DamID.
Main Methods:
- Generation of novel FLP lines targeting specific cell types in C. elegans.
- Development of a FLP-inducible protein degradation system for green fluorescent fusion proteins.
- Adaptation of RNA polymerase DamID for FLP-mediated recombination to identify tissue-specific transcriptomes.
- Validation using stable nuclear pore proteins (MEL-28/ELYS, NPP-2/NUP85) and the hypodermis tissue.
Main Results:
- Established FLP lines enabling recombination in distal tip cells, somatic gonad, coelomocytes, and epithelial P lineage.
- Demonstrated successful depletion of long-lived proteins by combining gene knockout with the novel degradation system.
- Successfully identified known hypodermal genes using FLP-mediated RNA polymerase DamID, validating the transcriptomic profiling approach.
- Showcased the combined utility of gene inactivation and transcriptomic profiling for gene function studies.
Conclusions:
- The expanded FLP toolkit provides enhanced capabilities for precise genetic manipulation in C. elegans.
- The developed protein degradation system effectively overcomes limitations of traditional gene knockouts.
- FLP-mediated transcriptomic profiling offers a powerful method for identifying tissue-specific gene expression patterns.
- These advancements facilitate comprehensive studies of gene function in complex biological processes within C. elegans.
