The success of Candida albicans as a major human fungal pathogen is dependent on its ability to colonize and survive as a commensal on diverse mucosal surfaces. One trait required for survival and virulence in the host is the morphogenetic yeast-to-hypha transition. Mds3 was identified as a regulator of pH-dependent morphogenesis that functions in parallel with the classic Rim101 pH-sensing pathway. Microarray analyses revealed that mds3 Delta/Delta cells had an expression profile indicative of a hyperactive TOR pathway, including the preferential expression of genes encoding ribosomal proteins and a decreased expression of genes involved in nitrogen source utilization. The transcriptional and morphological defects of the mds3 Delta/Delta mutant were rescued by rapamycin, an inhibitor of TOR, and this rescue was lost in strains carrying the rapamycin-resistant TOR1-1 allele or an rbp1 Delta/Delta deletion. Rapamycin also rescued the transcriptional and morphological defects associated with the loss of Sit4, a TOR pathway effector, but not the loss of Rim101 or Ras1. The sit4 Delta/Delta and mds3 Delta/Delta mutants had additional phenotypic similarities, suggesting that Sit4 and Mds3 function similarly in the TOR pathway. Finally, we found that Mds3 and Sit4 coimmunoprecipitate. Thus, Mds3 is a new member of the TOR pathway that contributes to morphogenesis in C. albicans as a regulator of this key morphogenetic 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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Evidence ID | Analyze ID | File | Description |
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