Cloning of the Saccharomyces cerevisiae FUM1 gene downstream of the strong GAL10 promoter resulted in inducible overexpression of fumarase in the yeast. The overproducing strain exhibited efficient bioconversion of fumaric acid to L-malic acid with an apparent conversion value of 88% and a conversion rate of 80.4 mmol of fumaric acid/h per g of cell wet weight, both of which are much higher than parameters known for industrial bacterial strains. The only product of the conversion reaction was L-malic acid, which was essentially free of the unwanted by-product succinic acid. The GAL10 promoter situated upstream of a promoterless FUM1 gene led to production and correct distribution of the two fumarase isoenzyme activities between cytosolic and mitochondrial subcellular fractions. The amino-terminal sequence of fumarase contains the mitochondrial signal sequence since (i) 92 of 463 amino acid residues from the amino terminus of fumarase are sufficient to localize fumarase-lacZ fusions to mitochondria and (ii) fumarase and fumarase-lacZ fusions lacking the amino-terminal sequence are localized exclusively in the cytosol. The possibility that both mitochondrial and cytosolic fumarases are derived from the same initial translation product is discussed.
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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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