Yeast mutants lacking proteinase A were isolated. One of these mutants (Hb I) is characterized in detail. The mutation called pra1 segregates 2:2 in meiotic tetrads indicating a single gene mutation. No anti-(proteinase A) cross-reacting material can be detected. Diploids heterozygous for pra1 show gene dosage. Thus, it appears that PRA1 might be the structural gene for proteinase A. Results obtained with this mutant show that proteinase A is not a vital component of the vegetative cell cycle. The mutant exhibits normal mitotic growth under rich and poor growth conditions and shows normal mating. Enzymes subject to carbon catabolite inactivation and inactivation of NADP-dependent glutamate dehydrogenase, processes which were proposed to be of proteolytic nature, are not affected by the absence of proteinase A. However, protein degradation under sporulation conditions is about 30% reduced in proteinase A mutant cells. The differentiation process of sporulation is also disturbed leading to a 40% reduced sporulation frequency in mutant cells.
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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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