Proteomic and functional genomic landscape of receptor tyrosine kinase and ras to extracellular signal-regulated kinase signaling.

Abstract

Characterizing the extent and logic of signaling networks is essential to understanding specificity in such physiological and pathophysiological contexts as cell fate decisions and mechanisms of oncogenesis and resistance to chemotherapy. Cell-based RNA interference (RNAi) screens enable the inference of large numbers of genes that regulate signaling pathways, but these screens cannot provide network structure directly. We describe an integrated network around the canonical receptor tyrosine kinase (RTK)-Ras-extracellular signal-regulated kinase (ERK) signaling pathway, generated by combining parallel genome-wide RNAi screens with protein-protein interaction (PPI) mapping by tandem affinity purification-mass spectrometry. We found that only a small fraction of the total number of PPI or RNAi screen hits was isolated under all conditions tested and that most of these represented the known canonical pathway components, suggesting that much of the core canonical ERK pathway is known. Because most of the newly identified regulators are likely cell type- and RTK-specific, our analysis provides a resource for understanding how output through this clinically relevant pathway is regulated in different contexts. We report in vivo roles for several of the previously unknown regulators, including CG10289 and PpV, the Drosophila orthologs of two components of the serine/threonine-protein phosphatase 6 complex; the Drosophila ortholog of TepIV, a glycophosphatidylinositol-linked protein mutated in human cancers; CG6453, a noncatalytic subunit of glucosidase II; and Rtf1, a histone methyltransferase.

• Authors: Adam A Friedman, George Tucker, Rohit Singh, Dong Yan, Arunachalam Vinayagam, Yanhui Hu, Richard Binari, Pengyu Hong, Xiaoyun Sun, Maura Porto, Svetlana Pacifico, Thilakam Murali, Russell L Finley Jr, John M Asara, Bonnie Berger, Norbert Perrimon
• Journal: Science signaling (Sci Signal) Vol. 4 Issue 196 Pg. rs10 (Oct 25 2011) ISSN: 1937-9145 [Electronic] United States
• PMID: 22028469 (Publication Type: Journal Article, Research Support, N.I.H., Extramural, Research Support, Non-U.S. Gov't)

Chemical References

• Drosophila Proteins
• Receptor Protein-Tyrosine Kinases
• Extracellular Signal-Regulated MAP Kinases
• ras Proteins

Topics

• Algorithms
• Animals
• Blotting, Western
• Cell Line
• Drosophila (cytology, genetics, metabolism)
• Drosophila Proteins (genetics, metabolism)
• Extracellular Signal-Regulated MAP Kinases (genetics, metabolism)
• Gene Regulatory Networks
• Genomics (methods)
• Immunoprecipitation
• MAP Kinase Signaling System
• Models, Genetic
• Protein Binding
• Protein Interaction Mapping (methods)
• Proteomics (methods)
• RNA Interference
• Receptor Protein-Tyrosine Kinases (genetics, metabolism)
• Wings, Animal (growth & development, metabolism)
• ras Proteins (genetics, metabolism)