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Determining Genetic Expression Profiles in C. elegans Using Microarray and Real-time PCR
Published on: July 30, 2011
A quantitative targeted proteomics approach to validate predicted microRNA targets in C. elegans
Marko Jovanovic1, Lukas Reiter, Paola Picotti
1Institute of Molecular Life Sciences, University of Zurich, Zurich, Switzerland.
Nature Methods
|September 14, 2010
Summary
This study introduces a targeted proteomics method to validate microRNA (miRNA) targets in worms. This approach efficiently identifies genuine miRNA targets, aiding biological research.
Area of Science:
- Proteomics
- Molecular Biology
- Genomics
Background:
- Computational methods predict microRNA (miRNA) targets, but experimental validation is challenging.
- Efficient strategies are crucial for validating these predicted miRNA targets in biological systems.
Purpose of the Study:
- To present a large-scale targeted proteomics approach for validating computationally predicted miRNA targets in Caenorhabditis elegans.
- To demonstrate the utility of selected reaction monitoring (SRM) for quantifying protein targets of miRNAs.
Main Methods:
- Utilized selected reaction monitoring (SRM) to quantify 161 proteins in wild-type and let-7 mutant Caenorhabditis elegans.
- Employed independent downstream analyses including genetic interaction, polysomal profiling, and luciferase assays for validation.
Main Results:
- Targeted proteomics significantly enriched for biologically relevant let-7 miRNA interactors.
- Validated the zinc finger protein ZTF-7 as a bona fide let-7 miRNA target.
- Successfully validated predicted miR-58 targets, showing adaptability to other miRNAs.
Conclusions:
- Targeted mass spectrometry is a robust method for validating candidate miRNA targets from computational predictions or large-scale experiments.
- The described proteomics strategy is adaptable for miRNA target validation in other organisms.
