A gene encoding a putative GABA aminotransferase (ugatA) was isolated from the basidiomycete Ustilago maydis via heterologous hybridization to the GABA aminotransferase gene (gatA) of Aspergillus nidulans . The derived amino-acid sequence of ugatA shows strong identity throughout the protein to the GABA aminotransferase enzymes from A. nidulans and Saccharomyces cerevisiae. Northern analysis in U. maydis indicated that the ugatA transcript is inducible by the omega-amino acids GABA and beta-alanine, and is not subject to nitrogen catabolite repression. With the use of ugatA promoter-lacZ fusion constructs, it was demonstrated that the removal of sequences located approximately 250 bp 5' to the translational start site of ugatA (including multiple copies of a 7-bp direct repeat) resulted in the loss of induction by omega-amino acids. While the ugatA gene under the control of the A. nidulans gatA promoter was able to fully complement a gatA- phenotype in A. nidulans, the full-length ugatA gene was not, suggesting a lack of expression from the U. maydis promoter in A. nidulans. A U. maydis strain with a gene disruption at the ugatA locus showed decreased growth on beta-alanine as a sole nitrogen source, but was able to grow on GABA as a sole nitrogen source, indicating an alternative pathway for the utilization of GABA in U. 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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