Regulation of the DH-PH tandem of guanine nucleotide exchange factor for Rho GTPases by phosphoinositides. - Inserm - Institut national de la santé et de la recherche médicale Accéder directement au contenu
Article Dans Une Revue Adv Biol Regul Année : 2012

Regulation of the DH-PH tandem of guanine nucleotide exchange factor for Rho GTPases by phosphoinositides.

Résumé

Rho GTPases act as molecular switches central in cellular processes such as cytoskeleton dynamics, migration, cell proliferation, growth or survival. Their activation is tightly regulated downstream of cell surface receptors by Guanine nucleotide Exchange Factors (GEFs), that are responsible for the specificity, the accuracy, and the spatial restriction of Rho GTPases response to extracellular cues. Because there is about four time more RhoGEFs that Rho GTPases, and GEFs do not always show a strict specificity for GTPases, it is clear that their regulation depends on specific interactions with the subcellular environment. RhoGEFs bear a peculiar structure, highly conserved though evolution, consisting of a DH-PH tandem, the DH (Dbl homology) domain being responsible for the exchange activity. The function of the PH (Pleckstrin homology) domain known to bind phosphoinositides, however, remains elusive, and reports are in many cases rather confusing. This review summarizes data on the regulation of RhoGEFs activity through interaction of the PH-associated DH domain with phosphoinositides which are considered as critical players in the spatial organization of major signaling pathways.

Dates et versions

inserm-00801377 , version 1 (15-03-2013)

Identifiants

Citer

Julien Viaud, Frédérique Gaits-Iacovoni, Bernard Payrastre. Regulation of the DH-PH tandem of guanine nucleotide exchange factor for Rho GTPases by phosphoinositides.. Adv Biol Regul, 2012, 52 (2), pp.303-14. ⟨10.1016/j.jbior.2012.04.001⟩. ⟨inserm-00801377⟩
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