Members of the APSES protein group are basic helix-loop-helix (bHLH) proteins that regulate processes such as mating, asexual sporulation and dimorphic growth in fungi. Penicillium marneffei is a human pathogen and is the only member of its genus to display a dimorphic growth transition. At 25 degrees C, P. marneffei grows with a filamentous morphology and produces asexual spores from multicellular con-idiophores. At 37 degrees C, the filamentous morphology is replaced by yeast cells that reproduce by fission. We have cloned and characterized an APSES protein-encoding gene from P. marneffei that has a high degree of similarity to Aspergillus nidulans stuA. Deletion of stuA in P. marneffei showed that it is required for metula and phialide formation during conidiation but is not required for dimorphic growth. This suggests that APSES proteins may control processes that require budding (formation of the metulae and phialides, pseudohyphal growth in Saccharomyces cerevisiae and dimorphic growth in Candida albicans) but not those that require fission (dimorphic growth in P. marneffei). The A. nidulans DeltastuA mutant has defects in both conidiation and mating. The P. marneffei stuA gene was capable of complementing the conidiation defect but could only inefficiently complement the sexual defects of the A. nidulans mutant. This suggests that the P. marneffei gene, which comes from an asexual species, has diverged significantly from the A. nidulans gene with respect to sexual but not asexual development.
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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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