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- W2024142657 endingPage "273" @default.
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- W2024142657 abstract "RhoA/B/C and CDC42/Rac, which form two subgroups of the rho guanosine triphosphatase (GTPase) family, regulate various aspects of actin cytoskeleton organisation. In cytosol, guanosine diphosphate (GDP) dissociation inhibitor (GDI) interacts with and maintains rho GTPases in their inactive GDP-bound form. RhoGDI is a ubiquitously expressed GDI, whereas D4/LyGDI is hematopoietic cell-specific and 10-fold less potent than RhoGDI in binding to and regulating rho GTPases. We have combined microanalytical liquid chromatography with the use of specific antibodies in order to separate D4/LyGDI and RhoDGI-complexes from the cytosol of U937 cells and to demonstrate that the two GDIs associate with different rho protein partners. RhoGDI can form a complex with CDC42Hs, RhoA, Rac1 and Rac2, while none of these GTPases was found to interact with D4/LyGDI. In addition, we found that stimulation of U937 cells with phorbol ester leads to phosphorylation of D4/LyGDI. Our results suggest that LyGDI forms complexes with specific rho GTPases expressed in hematopoietic cells where it may regulate specific pathways." @default.
- W2024142657 created "2016-06-24" @default.
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- W2024142657 date "1998-01-30" @default.
- W2024142657 modified "2023-10-17" @default.
- W2024142657 title "Differential properties of D4/LyGDI versus RhoGDI: phosphorylation and rho GTPase selectivity" @default.
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- W2024142657 doi "https://doi.org/10.1016/s0014-5793(98)00020-9" @default.
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