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Título : Distinct utilization of effectors and biological outcomes resulting from site-specific ras activation: Ras functions in lipid rafts and golgi complex are dispensable for proliferation and transformation
Autor : Matallanas, David; Sanz-Moreno, Victoria; Arozarena, Imanol; Calvo, Fernando; Agudo-Ibáñez, Lorena; Santos de Dios, Eugenio; Berciano, María T.; Crespo, Piero
Fecha de publicación : ene-2006
Editor: American Society for Microbiology
Citación : Molecular and Cellular Biology 26(1): 100–116 (2006)
Resumen: Ras proteins are distributed in different types of plasma membrane microdomains and endomembranes. However, how microlocalization affects the signals generated by Ras and its subsequent biological outputs is largely unknown. We have approached this question by selectively targeting RasV12 to different cellular sublocalizations. We show here that compartmentalization dictates Ras utilization of effectors and the intensity of its signals. Activated Ras can evoke enhanced proliferation and transformation from most of its platforms, with the exception of the Golgi complex. Furthermore, signals that promote survival emanate primarily from the endoplasmic reticulum pool. In addition, we have investigated the need for the different pools of endogenous Ras in the conveyance of upstream mitogenic and transforming signals. Using targeted RasN17 inhibitory mutants and in physiological contexts such as H-Ras/N-Ras double knockout fibroblasts, we demonstrate that Ras functions at lipid rafts and at the Golgi complex are fully dispensable for proliferation and transformation.
Versión del editor: http://dx.doi.org/10.1128/MCB.26.1.100-116.2006
URI : http://hdl.handle.net/10261/5137
DOI: 10.1128/MCB.26.1.100-116.2006
ISSN: 1098-5549
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