The ability of Candida albicans, a major fungal pathogen, to switch between a yeast form, and a hyphal (mold) form is recognized as being important for the ability of the organism to invade the host and cause disease. We found that a C. albicans mutant deleted for CaCDC4, a homologue of the Saccharomyces cerevisiae F-box protein component of the SCF(CDC4) ubiquitin ligase, is viable and displays constitutive filamentous, mostly hyphal, growth. The phenotype of the Cacdc4-/- mutant suggests that ubiquitin-mediated protein degradation is involved in the regulation of the dimorphic switch of C. albicans and that one or more regulators of the yeast-to-mold switch are among the substrates of SCF(CaCDC4). Epistasis analysis indicates that the Cacdc4-/- phenotype is largely independent of the filamentation-inducing transcription factors Efg1 and Cph1. We identify C. albicans Far1 and Sol1, homologues of the S. cerevisiae SCF(CDC4) substrates Far1 and Sic1, and show that Sol1 is a substrate of C. albicans Cdc4. Neither protein is essential for the hyphal phenotype of the Cacdc4-/- mutant. However, ectopic expression and deletion of SOL1 indicate a role for this gene in C. albicans morphogenesis.
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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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