A maize root fraction which inactivates nitrate reductase has been shown to have protease activity which can be measured by the hydrolysis of azocasein. This inactivating enzyme was also found to inactivate yeast tryptophan synthase. Yeast proteases A and B, which inactivate this latter enzyme, also gave a specific inactivation of the maize nitrate reductase. The maize root inactivating enzyme, like yeast protease B, degraded casein, and was inhibited by phenylmethylsulphonyl fluoride. A partially-purified yeast inhibitor prevented catalysis by the yeast proteases and maize root inactivating enzyme, but purified yeast inhibitors were without effect on the latter protein. The level of nitrate reductase-inactivating activity, and associated azocasein-degrading activity, increased with age of the maize root. Evidence was obtained for a heat stable inhibitor which maintained them in an inactive state, especially in the young root tip 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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