Decorin is a novel antagonistic ligand of the Met receptor
Abbreviated Journal Title
J. Cell Biol.
EPIDERMAL-GROWTH-FACTOR; TYROSINE KINASE; BETA-CATENIN; C-MET; DOWN-REGULATION; IN-VIVO; LISTERIA-MONOCYTOGENES; BREAST-CANCER; SIGNAL-TRANSDUCTION; MAMMALIAN-CELLS; Cell Biology
Decorin, a member of the small leucine-rich proteoglycan gene family, impedes tumor cell growth by down-regulating the epidermal growth factor receptor. Decorin has a complex binding repertoire, thus, we predicted that decorin would modulate the bioactivity of other tyrosine kinase receptors. We discovered that decorin binds directly and with high affinity (K(d) = similar to 1.5 nM) to Met, the receptor for hepatocyte growth factor (HGF). Binding of decorin to Met is efficiently displaced by HGF and less efficiently by internalin B, a bacterial Met ligand. Interaction of decorin with Met induces transient receptor activation, recruitment of the E3 ubiquitin ligase c-Cbl, and rapid intracellular degradation of Met (half-life = similar to 6 min). Decorin suppresses intracellular levels of beta-catenin, a known downstream Met effector, and inhibits Met-mediated cell migration and growth. Thus, by antagonistically targeting multiple tyrosine kinase receptors, decorin contributes to reduction in primary tumor growth and metastastic spreading.
Journal of Cell Biology
"Decorin is a novel antagonistic ligand of the Met receptor" (2009). Faculty Bibliography 2000s. 1581.