The dimorphic transition from yeast to pseudohyphae in the petroleum-assimilating yeast Candida tropicalis occurs following the addition of ethanol to glucose semi-defined medium. Subtractive gene cloning was performed on the cDNA from the yeast-growing control culture and on that from the ethanol-supplemented one (the ethanol culture). A homologue of Schizosaccharomyces pombe nmt1+ or Saccharomyces cerevisiae THI5 was isolated from the cDNA fraction as a preferentially expressed gene for the ethanol culture. This homologue was tentatively called Ctnmt1+, since exogenous thiamine repressed its expression in C. tropicalis growth media. The ethanol culture showed a biphasic pattern of growth phases and the expression of Ctnmt1+ occurred at the first growth phase. The supplementation of thiamine to the ethanol culture at the first phase was followed by repression of Ctnmt1+ expression and also delay of pseudohyphal growth: filamentous growth was inhibited and chains of yeast cells were formed. A Ctnmt1+ disruptant of this organism did not show thiamine auxotrophy and produced pseudohyphal filaments even in the control culture. The supplementation of oxythiamine, an analog of thiamine, to the control culture was followed by the appearance of pseudohyphal filaments, indicating the participation of thiamine during the process of pseudohyphal growth in this organism.
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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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