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Cell. 2007 Jun 1;129(5):865-77.

GEFs and GAPs: critical elements in the control of small G proteins.

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  • 1Department of Physiological Chemistry and Centre of Biomedical Genetics, UMC Utrecht Universiteitsweg 100, 3584 CG Utrecht, The Netherlands. j.l.bos@umcutrecht.nl

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  • Cell. 2007 Jul 27;130(2):385.

Abstract

Guanine nucleotide exchange factors (GEFs) and GTPase-activating proteins (GAPs) regulate the activity of small guanine nucleotide-binding (G) proteins to control cellular functions. In general, GEFs turn on signaling by catalyzing the exchange from G-protein-bound GDP to GTP, whereas GAPs terminate signaling by inducing GTP hydrolysis. GEFs and GAPs are multidomain proteins that are regulated by extracellular signals and localized cues that control cellular events in time and space. Recent evidence suggests that these proteins may be potential therapeutic targets for developing drugs to treat various diseases, including cancer.

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