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• W2149278857 abstract "RhoG is a member of the Rac-like subgroup of Rho GTPases and has been linked to a variety of different cellular functions. Nevertheless, many aspects of RhoG upstream and downstream signaling remain unclear; in particular, few extracellular stimuli that modulate RhoG activity have been identified. Here, we describe that stimulation of epithelial cells with epidermal growth factor leads to strong and rapid activation of RhoG. Importantly, this rapid activation was not observed with other growth factors tested. The kinetics of RhoG activation after epidermal growth factor (EGF) stimulation parallel the previously described Rac1 activation. However, we show that both GTPases are activated independently of one another. Kinase inhibition studies indicate that the rapid activation of RhoG and Rac1 after EGF treatment requires the activity of the EGF receptor kinase, but neither phosphatidylinositol 3-kinase nor Src kinases. By using nucleotide-free RhoG pull-down assays and small interfering RNA-mediated knockdown studies, we further show that guanine-nucleotide exchange factors (GEFs) of the Vav family mediate EGF-induced rapid activation of RhoG. In addition, we found that in certain cell types the recently described RhoG GEF PLEKHG6 can also contribute to the rapid activation of RhoG after EGF stimulation. Finally, we present results that show that RhoG has functions in EGF-stimulated cell migration and in regulating EGF receptor internalization." @default.
• W2149278857 created "2016-06-24" @default.
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• W2149278857 creator A5074526071 @default.
• W2149278857 date "2010-05-01" @default.
• W2149278857 modified "2023-10-16" @default.
• W2149278857 title "Endogenous RhoG Is Rapidly Activated after Epidermal Growth Factor Stimulation through Multiple Guanine-Nucleotide Exchange Factors" @default.
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• W2149278857 doi "https://doi.org/10.1091/mbc.e09-09-0809" @default.
• W2149278857 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/2861620" @default.
• W2149278857 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/20237158" @default.
• W2149278857 hasPublicationYear "2010" @default.
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