The RGD1 gene was identified during systematic genome sequencing of Saccharomyces cerevisiae. To further understand Rgd1p function, we set up a synthetic lethal screen for genes interacting with RGD1. Study of one lethal mutant made it possible to identify the SLG1 and MID2 genes. The gene SLG1/HCS77/WSC1 was mutated in the original synthetic lethal strain, whereas MID2/SMS1 acted as a monocopy suppressor. The SLG1 gene has been described to be an upstream component in the yeast PKC pathway and encodes a putative cell surface sensor for the activation of cell integrity signalling. First identified by viability loss of shmoos after pheromone exposure, and since found in different genetic screens, MID2 was recently reported as also encoding an upstream activator of the PKC pathway. The RGD1 gene showed genetic interactions with both sensors of cell integrity pathway. The rgd1 slg1 synthetic lethality was rescued by osmotic stabilization, as expected for mutants altered in cell wall integrity. The slight viability defect of rgd1 in minimal medium, which was exacerbated by mid2, was not osmoremediated. As for mutants altered in PKC pathway, the accumulation of small-budded dead cells in slg1, rgd1 and mid2 after heat shock was prevented by 1 M sorbitol. In addition, the rgd1 strain also displayed dead shmoos after pheromone treatment, like mid2. Taken together, the present results indicate close functional links between RGD1, MID2 and SLG1 and suggest that RGD1 and MID2 interact in a cell integrity signalling functionally linked to the PKC pathway.
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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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