The fungal pathogen Ustilago maydis alternates between budding and filamentous growth during its life cycle. This dimorphic transition is regulated by environmental factors and mating. We cloned a new gene, crk1, which encodes a protein with sequence similarity to Ime2, a kinase involved in developmental choices in S. cerevisiae. Disruption of the crk1 gene in U. maydis resulted in cells that are unable to respond in an appropriate manner to environmental stimuli and show defects in morphogenesis and cell cycle adjustment to changing conditions. We have analysed the regulation of the crk1 gene and demonstrated that cAMP and MAPK pathways have opposite influences on the transcript levels for crk1. Furthermore, we have shown that alterations in the components of these pathways impair the ability of the cellular machinery to adapt to changing conditions. These results demonstrate an important role for the crk1- encoded protein in the morphogenesis and environmental adaptation in Ustilago maydis.
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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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