BAIT
CDC42
Rho family GTPase CDC42, L000000276, YLR229C
Small rho-like GTPase; essential for establishment and maintenance of cell polarity; plays a role late in cell fusion via activation of key cell fusion regulator Fus2p; mutants have defects in the organization of actin and septins
GO Process (13)
GO Function (1)
GO Component (8)
Gene Ontology Biological Process
- budding cell apical bud growth [IMP]
- budding cell isotropic bud growth [IMP]
- conjugation with cellular fusion [IMP]
- establishment of cell polarity [IMP]
- invasive growth in response to glucose limitation [IMP]
- pheromone-dependent signal transduction involved in conjugation with cellular fusion [IGI, IMP]
- positive regulation of exocytosis [IGI, IMP, IPI]
- positive regulation of pseudohyphal growth [IMP]
- regulation of exit from mitosis [IMP]
- regulation of exocyst localization [IMP]
- regulation of initiation of mating projection growth [IMP]
- regulation of vacuole fusion, non-autophagic [IMP]
- septin ring organization [IMP]
Gene Ontology Molecular Function
Gene Ontology Cellular Component
Saccharomyces cerevisiae (S288c)
PREY
MSB4
L000003919, YOL112W
GTPase-activating protein of the Ras superfamily; acts primarily on Sec4p, localizes to the bud site and bud tip; msb3 msb4 double mutation causes defects in secretion and actin organization; similar to the TBC-domain Tre2 oncogene; MSB4 has a paralog, MSB3, that arose from the whole genome duplication
GO Process (2)
GO Function (1)
GO Component (3)
Gene Ontology Biological Process
Gene Ontology Molecular Function
Gene Ontology Cellular Component
Saccharomyces cerevisiae (S288c)
Synthetic Lethality
A genetic interaction is inferred when mutations or deletions in separate genes, each of which alone causes a minimal phenotype, result in lethality when combined in the same cell under a given condition.
Publication
The GAP activity of Msb3p and Msb4p for the Rab GTPase Sec4p is required for efficient exocytosis and actin organization.
Polarized growth in Saccharomyces cerevisiae is thought to occur by the transport of post-Golgi vesicles along actin cables to the daughter cell, and the subsequent fusion of the vesicles with the plasma membrane. Previously, we have shown that Msb3p and Msb4p genetically interact with Cdc42p and display a GTPase-activating protein (GAP) activity toward a number of Rab GTPases in vitro. ... [more]
J. Cell Biol. Aug. 18, 2003; 162(4);635-46 [Pubmed: 12913108]
Throughput
- Low Throughput
Ontology Terms
- phenotype: inviable (APO:0000112)
Additional Notes
- MSB3/MSB4/CDC42 triple mutants are synthetic lethal
Related interactions
| Interaction | Experimental Evidence Code | Dataset | Throughput | Score | Curated By | Notes |
|---|---|---|---|---|---|---|
| CDC42 MSB4 | Reconstituted Complex Reconstituted Complex An interaction is detected between purified proteins in vitro. | Low | - | BioGRID | - |
Curated By
- BioGRID