TY - JOUR A1 - Jovanovic, Marko A1 - Reiter, Lukas A1 - Clark, Alejandra A1 - Weiss, Manuel A1 - Picotti, Paola A1 - Rehrauer, Hubert A1 - Frei, Andreas A1 - Neukomm, Lukas J. A1 - Kaufman, Ethan A1 - Wollscheid, Bernd A1 - Simard, Martin J. A1 - Miska, Eric A. A1 - Aebersold, Ruedi A1 - Gerber, André P. A1 - Hengartner, Michael O. T1 - RIP-chip-SRM—a new combinatorial large-scale approach identifies a set of translationally regulated bantam/miR-58 targets in C. elegans Y1 - 2012/07/01 JF - Genome Research JO - Genome Research SP - 1360 EP - 1371 DO - 10.1101/gr.133330.111 VL - 22 IS - 7 UR - http://genome.cshlp.org/content/22/7/1360.abstract N2 - MicroRNAs (miRNAs) are small, noncoding RNAs that negatively regulate gene expression. As miRNAs are involved in a wide range of biological processes and diseases, much effort has been invested in identifying their mRNA targets. Here, we present a novel combinatorial approach, RIP-chip-SRM (RNA-binding protein immunopurification + microarray + targeted protein quantification via selected reaction monitoring), to identify de novo high-confidence miRNA targets in the nematode Caenorhabditis elegans. We used differential RIP-chip analysis of miRNA-induced silencing complexes from wild-type and miRNA mutant animals, followed by quantitative targeted proteomics via selected reaction monitoring to identify and validate mRNA targets of the C. elegans bantam homolog miR-58. Comparison of total mRNA and protein abundance changes in mir-58 mutant and wild-type animals indicated that the direct bantam/miR-58 targets identified here are mainly regulated at the level of protein abundance, not mRNA stability. ER -