To improve ethanol production in Saccharomyces cerevisiae, two yeast strains were constructed. In the mutant, KAM-4, the GPD1 gene, which encodes a glycerol 3-phosphate dehydrogenase of S. cerevisiae to synthesize glycerol, was deleted. The mutant KAM-12 had the GLT1 gene (encodes glutamate synthase) placed under the PGK1 promoter while harboring the GPD1 deletion. Notably, overexpression of GLT1 by the PGK1 promoter along with GPD1 deletion resulted in a 10.8% higher ethanol production and a 25.0% lower glycerol formation compared to the wild type in anaerobic fermentations. The growth rate of KAM-4 was slightly lower than that of the wild type under the exponential phase whereas KAM-12 and the wild type were indistinguishable in the biomass concentration at the end of growth period. Meanwhile, dramatic reduction of formation of acetate and pyruvic acid was observed in all the mutants compared to the wild type.
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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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