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piggyBac-based insertional mutagenesis and enhancer detection as a tool for functional insect genomics
Carsten Horn1, Nils Offen, Sverker Nystedt
1Lehrstuhl für Genetik, Universität Bayreuth, 95447 Bayreuth, Germany.
Genetics
|March 6, 2003
Summary
We developed a versatile piggyBac-based system for enhancer detection and gene expression in arthropods. This tool facilitates functional genomics and saturation mutagenesis, enabling new discoveries in nonmodel organisms.
Area of Science:
- Functional genomics
- Molecular biology
- Genetics
Background:
- Transposon mutagenesis is crucial for functional genomics.
- Existing systems often lack broad applicability across species.
Purpose of the Study:
- To develop a non-species-specific enhancer detection and binary expression system using the piggyBac transposable element.
- To establish a tool for functional genomics and saturation mutagenesis in arthropods, including nonmodel organisms.
Main Methods:
- Utilized piggyBac and Hermes transposons with distinct transformation markers.
- Employed GAL4delta or tTA transactivators as primary reporters.
- Used UASp-EYFP or TRE-EYFP as secondary reporter elements for enhancer detection.
- Conducted pilot screens in Drosophila melanogaster.
Main Results:
- Achieved an 80% jumping rate for novel autosomal insertions.
- Identified homozygous lethality in 3.8% of insertions, reversible by piggyBac excision.
- Observed tissue-specific enhancer activities, particularly with the GAL4delta/UASp system.
- Demonstrated insertions in coding, noncoding, and uncharacterized genes.
Conclusions:
- The developed piggyBac system is effective for enhancer detection and gene expression across various arthropods.
- This system significantly advances saturation mutagenesis capabilities in Drosophila.
- The tool holds promise for functional genomics research in nonmodel arthropods.