Screening of a cDNA library constructed under alkaline pH mediated growth of Aspergillus oryzae implicated a vacuolar H+-ATPase gene (vmaA) as a putative candidate involved in alkaline pH adaptation. A. oryzae vmaA genomic DNA extended to 2072 bp including three introns and encoded a protein of 605 amino acids. VmaAp was homologous to Vma-1p from Neurospora crassa (71%), Vma1p from Saccharomyces cerevisiae (69%) and ATP6A2 from human (49%). The vmaA cDNA complemented S. cerevisiae V-ATPase disrupted strain (Deltavma1) was viable at alkaline pH 8.0 and in the presence of CaCl(2) (100 mM). Northern analysis revealed an enhanced expression of vmaA during growth of A. oryzae in alkaline medium (pH 10.0). The A. oryzae vmaA disruptant exhibited abnormally shrunken vacuoles and hyphal walls at pH 8.5 and a growth defect at pH 10.0, implicating an alkaline pH stress responsive role for vmaA in A. oryzae.
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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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