西亚试剂：A quantitative targeted proteomics approach to validate pre

发布时间：2025-12-22

A quantitative targeted proteomics approach to validate predicted microRNA targets in C. elegans
Marko Jovanovic1,2,3,11, Lukas Reiter1,2,3,10,11, Paola Picotti4, Vinzenz Lange4,5,10, Erica Bogan1,2, Benjamin A Hurschler6, Cherie Blenkiron7,8,10, Nicolas J Lehrbach7,8, Xavier C Ding6, Manuel Weiss1,2,3, Sabine P Schrimpf1,3, Eric A Miska7,8, Helge Gro?hans6, Ruedi Aebersold4,5,9 & Michael O Hengartner1,3

Efficient experimental strategies are needed to validate computationally predicted microRNA (miRNA) target genes. Here we present a large-scale targeted proteomics approach to validate predicted miRNA targets in Caenorhabditis elegans. Using selected reaction monitoring (SRM), we quantified 161 proteins of interest in extracts from wild-type and let-7 mutant worms. We demonstrate by independent experimental downstream analyses such as genetic interaction, as well as polysomal profiling and luciferase assays, that validation by targeted proteomics substantially enriched for biologically relevant let-7 interactors. For example, we found that the zinc finger protein ZTF-7 was a bona fide let-7 miRNA target. We also validated predicted miR-58 targets, demonstrating that this approach is adaptable to other miRNAs. We propose that targeted mass spectrometry can be applied generally to validate candidate lists generated by computational methods or in large-scale experiments, and that the described strategy should be readily adaptable to other organisms.

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