The yeast ilv2 gene, encoding acetolactate synthase, was subcloned in an Escherichia coli expression vector. Although a major part of the acetolactate synthase synthesized by E. coli cells harbouring this vector was packaged into protein inclusion bodies, we used these recombinant E. coli cells to produce large quantities of the yeast enzyme. The yeast acetolactate synthase was purified to homogeneity using first streptomycin and ammonium sulfate precipitations, followed by T-gel thiophilic interaction, Sephacryl S-300 gel filtration, Mono Q anion exchange, and Superose 12 gel filtration chromatography. SDS/PAGE and gel filtration of the purified enzyme showed that it is a dimer composed of two subunits, each with the molecular mass of 75 kDa. The purified yeast acetolactate synthase was further characterized with respect to pH optimum, dependence of the substrate, pyruvate, and requirements of the cofactors, thiamin diphosphate, Mg2+, and FAD.
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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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