Ras proteins were highly conserved during evolution. They function as a point of convergence for different signalling pathways in eukaryotes and are involved in a wide range of cellular responses (shift from gluconeogenic to fermentative growth, breakdown of storage carbohydrates, stress resistance, growth control and determination of life span, morphogenesis and development, and others). These proteins are members of the small GTPase superfamily, which are active in the GTP-bound form and inactive in the GDP-bound form. Given the importance of studies on the Ras protein activation state to understand the detailed mechanism of Ras-mediated signal transduction, we provide here a simple, sensitive, and reliable method, based on the high affinity interaction of Ras-GTP with the Ras binding domain (RBD) of Raf1, to measure the level of Ras2-GTP on total Ras2 in Saccharomyces cerevisiae. Moreover, to study the localization of Ras-GTP in vivo in single S. Cerevisiae cells, we expressed a probe consisting of a GFP fusion with a trimeric Ras Binding Domain of Raf1 (eGFP-RBD3), which was proven to be a useful live-cell biosensor for Ras-GTP in mammalian cells. © 2014 Springer Science+Business Media, LLC.

Colombo, S., & Martegani, E. (2014). Methods to study the Ras2 protein activation state and the subcellular localization of Ras-GTP in saccharomyces cerevisiae. In L. Trabalzini, & S.F. Retta (a cura di), Ras Signaling - Methods and Protocols (pp. 391-405). Humana Press Inc. [10.1007/978-1-62703-791-4_24].

Methods to study the Ras2 protein activation state and the subcellular localization of Ras-GTP in saccharomyces cerevisiae

COLOMBO, SONIA
;
MARTEGANI, ENZO
2014

Abstract

Ras proteins were highly conserved during evolution. They function as a point of convergence for different signalling pathways in eukaryotes and are involved in a wide range of cellular responses (shift from gluconeogenic to fermentative growth, breakdown of storage carbohydrates, stress resistance, growth control and determination of life span, morphogenesis and development, and others). These proteins are members of the small GTPase superfamily, which are active in the GTP-bound form and inactive in the GDP-bound form. Given the importance of studies on the Ras protein activation state to understand the detailed mechanism of Ras-mediated signal transduction, we provide here a simple, sensitive, and reliable method, based on the high affinity interaction of Ras-GTP with the Ras binding domain (RBD) of Raf1, to measure the level of Ras2-GTP on total Ras2 in Saccharomyces cerevisiae. Moreover, to study the localization of Ras-GTP in vivo in single S. Cerevisiae cells, we expressed a probe consisting of a GFP fusion with a trimeric Ras Binding Domain of Raf1 (eGFP-RBD3), which was proven to be a useful live-cell biosensor for Ras-GTP in mammalian cells. © 2014 Springer Science+Business Media, LLC.
No
Scientifica
Capitolo o saggio
Active Ras; cAMP/PKA pathway; Fluorescence microscopy; Nutrient; Saccharomyces cerevisiae; Small G proteins; Yeast
English
Ras Signaling - Methods and Protocols
9781627037907
Colombo, S., & Martegani, E. (2014). Methods to study the Ras2 protein activation state and the subcellular localization of Ras-GTP in saccharomyces cerevisiae. In L. Trabalzini, & S.F. Retta (a cura di), Ras Signaling - Methods and Protocols (pp. 391-405). Humana Press Inc. [10.1007/978-1-62703-791-4_24].
Colombo, S; Martegani, E
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/10281/48906
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