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2014 ; 5
(ä): e29469
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Rho GTPases, phosphoinositides, and actin: a tripartite framework for efficient
vesicular trafficking
#MMPMID24914539
Croisé P
; Estay-Ahumada C
; Gasman S
; Ory S
Small GTPases
2014[]; 5
(ä): e29469
PMID24914539
show ga
Rho GTPases are well known regulators of the actin cytoskeleton that act by
binding and activating actin nucleators. They are therefore involved in many
actin-based processes, including cell migration, cell polarity, and membrane
trafficking. With the identification of phosphoinositide kinases and phosphatases
as potential binding partners or effectors, Rho GTPases also appear to
participate in the regulation of phosphoinositide metabolism. Since both actin
dynamics and phosphoinositide turnover affect the efficiency and the fidelity of
vesicle transport between cell compartments, Rho GTPases have emerged as critical
players in membrane trafficking. Rho GTPase activity, actin remodeling, and
phosphoinositide metabolism need to be coordinated in both space and time to
ensure the progression of vesicles along membrane trafficking pathways. Although
most molecular pathways are still unclear, in this review, we will highlight
recent advances made in our understanding of how Rho-dependent signaling pathways
organize actin dynamics and phosphoinositides and how phosphoinositides
potentially provide negative feedback to Rho GTPases during endocytosis,
exocytosis and membrane exchange between intracellular compartments.