BAIT
SEC2
guanine nucleotide exchange factor SEC2, L000001828, YNL272C
Guanyl-nucleotide exchange factor for the small G-protein Sec4p; essential for post-Golgi vesicle transport and for autophagy; associates with the exocyst, via exocyst subunit Sec15p, on secretory vesicles
GO Process (2)
GO Function (2)
GO Component (5)
Gene Ontology Biological Process
- autophagy [IGI, IMP]
- exocytosis [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)
Dosage Lethality
A genetic interaction is inferred when over expression or increased dosage of one gene causes lethality in a strain that is mutated or deleted for another gene.
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)
- phenotype: heat sensitivity (APO:0000147)
Additional Notes
- overexpression of msb3 or msb4 causes lethality in a sec2 mutant
Curated By
- BioGRID