Quantitative proteomics by amino acid labeling in C. elegans.

Fredens, Julius; Engholm-Keller, Kasper; Giessing, Anders; Pultz, Dennis; Larsen, Martin Røssel; Højrup, Peter; Møller-Jensen, Jakob; Færgeman, Nils J · Nat Methods · 2011

basic_science · Level V

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Abstract

We demonstrate labeling of Caenorhabditis elegans with heavy isotope-labeled lysine by feeding them with heavy isotope-labeled Escherichia coli. Using heavy isotope-labeled worms and quantitative proteomics methods, we identified several proteins that are regulated in response to loss or RNAi-mediated knockdown of the nuclear hormone receptor 49 in C. elegans. The combined use of quantitative proteomics and selective gene knockdown is a powerful tool for C. elegans biology.

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