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Article
Nature Structural & Molecular Biology 14, 215–223 (1 March 2007) | doi:10.1038/nsmb1208
Tumor suppressor p53 restricts Ras stimulation of RhoA and cancer cell motility
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Abstract
Many features of the cancer cell phenotype emerge as a result of cooperation between multiple oncogenic mutations. Here we show that activated RasV12 and loss of p53 function can cooperate to promote cell motility, a feature closely associated with cancer progression to malignancy. Our analysis indicates that RasV12 and loss of p53 synergistically induce RhoA activity, revealing a previously unknown role for p53 in tumor suppression. p53 prevents activation of RhoA and thus induction of cell motility by RasV12 through a simple signaling circuit, which integrates multiple inputs that converge on RhoA. Our data suggest that p53 suppresses cancer progression to malignancy by modulating the quality of Ras signaling.
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