Journal
SCIENCE
Volume 307, Issue 5715, Pages 1621-1625Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1105776
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- NIGMS NIH HHS [P50 GM-62413] Funding Source: Medline
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Signaling pathways transmit information through protein interaction networks that are dynamically regulated by complex extracellular cues. We developed LUMIER (for luminescence-based mammalian interactome mapping), an automated high-throughput technology, to map protein-protein interaction networks systematically in mammalian cells and applied it to the transforming growth factor-beta (TGFbeta) pathway. Analysis using self-organizing maps and k-means clustering identified links of the TGFbeta pathway to the p21 activated kinase (PAK) network, to the polarity complex, and to Occludin, a structural component of tight junctions. We show that Occludin regulates TGFbeta type I receptor localization for efficient TGFbeta-dependent dissolution of tight junctions during epithelial-to-mesenchymal transitions.
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