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The human phosphotyrosine signaling network: Evolution and hotspots of hijacking in cancer
Authors
Cong Fu
Henriksson-Larsen,
+14 more
Tomonori Kaneko
Bengt Kayser
Karim M. Khan
Tarja I. Kinnunen
Lei Li
Shawn Shun Cheng Li
Michael F. Moran
Michelle F. Mottola
Ingrid Nygaard
Martin R. Schiller
Britt Stuge
Chabane Tibiche
Mireille Van Poppel
Edwin Wang
Publication date
1 July 2012
Publisher
Scholarship@Western
Abstract
Phosphotyrosine (pTyr) signaling, which plays a central role in cell-cell and cell-environment interactions, has been considered to be an evolutionary innovation in multicellular metazoans. However, neither the emergence nor the evolution of the human pTyr signaling system is currently understood. Tyrosine kinase (TK) circuits, each of which consists of a TK writer, a kinase substrate, and a related reader, such as Src homology (SH) 2 domains and pTyr-binding (PTB) domains, comprise the core machinery of the pTyr signaling network. In this study, we analyzed the evolutionary trajectories of 583 literature-derived and 50,000 computationally predicted human TK circuits in 19 representative eukaryotic species and assigned their evolutionary origins. We found that human TK circuits for intracellular pTyr signaling originated largely from primitive organisms, whereas the inter- or extracellular signaling circuits experienced significant expansion in the bilaterian lineage through the back- wiring of newly evolved kinases to primitive substrates and SH2/PTB domains. Conversely, the TK circuits that are involved in tissue-specific signaling evolved mainly in vertebrates by the back-wiring of vertebrate substrates to primitive kinases and SH2/PTB domains. Importantly, we found that cancer signaling preferentially employs the pTyr sites, which are linked to more TK circuits. Our work provides insights into the evolutionary paths of the human pTyr signaling circuits and suggests the use of a network approach for cancer intervention through the targeting of key pTyr sites and their associated signaling hubs in the network. © 2012, Published by Cold Spring Harbor Laboratory Press
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oai:ir.lib.uwo.ca:paedpub-3629
Last time updated on 08/10/2022