Activates CDC42, a member of the Ras-like family of Rho- and Rac proteins, by exchanging bound GDP for free GTP. Mediates VEGF-induced CDC42 activation. May regulate proangiogenic action of VEGF in vascular endothelial cells, including network formation, directional movement and proliferation. May play a role in regulating the actin cytoskeleton and cell shape.
Cytoplasm, cytoskeleton . Cell projection, ruffle membrane . Endoplasmic reticulum . Golgi apparatus . Early endosome . In peripheral membrane ruffles, colocolizes with F-actin. In confluent HUVECs, detected at cell-cell-contact sites where it colocalizes with vascular endothelial cadherin/CDH5.
Expressed in endothelial cells (at protein level).
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