The non-essential RGD1 gene from Saccharomyces cerevisiae encodes a protein that has been characterized in vitro as a Rho GTPase activating protein (RhoGAP) for the Rho3 and Rho4 proteins. Rgd1p, which displays a conserved FCH-coiled coil-Rho-GAP domain organization, showed a patch-like distribution in the cell, including a localization in growing buds. Using a genetic screen, we found that rgd1delta and vrp1alpha mutations exhibited a synthetic lethality, thus revealing an interaction between these genes. The VRP1 product is an actin and myosin interacting protein involved in polarized growth. Using mutant forms of both Rho3 and Rho4 proteins, we provide evidence for the involvement of these two GTPases in RGD1-VRP1 co-lethality. In addition, these results strongly argue in favour of Rho3p and Rho4p being the targets of Rgd1p RhoGAP activity in vivo. Genetic relationships between either VRP1 or RGD1 and actin cytoskeleton-linked genes were also studied. These and other well-established data support the idea that Vrp1, Las17, Rvs167 proteins belong to the same complex. This protein structure might act with myosins in various actin cytoskeleton-based activities, in co-operation with a Rho3p/Rho4p signalling pathway that is negatively regulated by Rgd1p GAP activity.
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Evidence ID | Analyze ID | Gene/Complex | Systematic Name/Complex Accession | Qualifier | Gene Ontology Term ID | Gene Ontology Term | Aspect | Annotation Extension | Evidence | Method | Source | Assigned On | Reference |
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Evidence ID | Analyze ID | Gene | Gene Systematic Name | Phenotype | Experiment Type | Experiment Type Category | Mutant Information | Strain Background | Chemical | Details | Reference |
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Evidence ID | Analyze ID | Gene | Gene Systematic Name | Disease Ontology Term | Disease Ontology Term ID | Qualifier | Evidence | Method | Source | Assigned On | Reference |
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Evidence ID | Analyze ID | Regulator | Regulator Systematic Name | Target | Target Systematic Name | Direction | Regulation of | Happens During | Regulator Type | Direction | Regulation Of | Happens During | Method | Evidence | Strain Background | Reference |
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Site | Modification | Modifier | Source | Reference |
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Evidence ID | Analyze ID | Interactor | Interactor Systematic Name | Interactor | Interactor Systematic Name | Allele | Assay | Annotation | Action | Phenotype | SGA score | P-value | Source | Reference | Note |
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Evidence ID | Analyze ID | Interactor | Interactor Systematic Name | Interactor | Interactor Systematic Name | Assay | Annotation | Action | Modification | Source | Reference | Note |
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Complement ID | Locus ID | Gene | Species | Gene ID | Strain background | Direction | Details | Source | Reference |
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Evidence ID | Analyze ID | Dataset | Description | Keywords | Number of Conditions | Reference |
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