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The role of palmitoylation in regulating Ras localization and function.

Ras GTPases are important regulators of pathways controlling proliferation, differentiation and transformation. Three ubiquitously expressed almost identical Ras genes are not functionally redundant; this has been attributed to their distinctive trafficking and localization profiles. A palmitoylation cycle controls the correct compartmentalization of H-Ras and N-Ras. We review recent data that reveal how this cycle can be regulated by membrane organization to influence the spatiotemporal signalling of Ras.