Controls Rho proteins homeostasis. Regulates the GDP,GTP exchange reaction of the Rho proteins by inhibiting the dissociation of GDP from th, and the subsequent binding of GTP to th. Retains Rho proteins such as CDC42, RAC1 and RHOA in an inactive cytosolic pool, regulating their stability and protecting th from degradation. Actively involved in the recycling and distribution of activated Rho GTPases in the cell, mediates extraction from mbranes of both inactive and activated molecules due its exceptionally high affinity for prenylated forms. Through the modulation of Rho proteins, may play a role in cell motility regulation. In glioma cells, inhibits cell migration and invasion by mediating the signals of SA5A and PLXNB3 that lead to inactivation of RAC1.
Identification of two human Rho GDP dissociation inhibitor proteins whose overexpression leads to disruption of the actin cytoskeleton.Leffers H., Nielsen M.S., Andersen A.H., Honore B., Madsen P., Vandekerckhove J., Celis J.E.Exp. Cell Res. 209:165-174(1993)
Research Topic:Signal Transduction
