Ethyl butyrate is one of the most important flavor substances in Chinese Baijiu and is also an ingredient in various daily-use chemical essences and food flavorings. In this study, to produce ethyl butyrate, we first introduced a butyryl-CoA synthesis pathway into Saccharomyces cerevisiae. Subsequently, three different alcohol acyltransferases, SAAT, VAAT, and CmAAT, were separately introduced into S. cerevisiae to catalyze the reaction of butyryl-CoA with ethanol to produce ethyl butyrate, and the results showed that strain EBS with SAAT produced the most ethyl butyrate (20.06 ± 2.23 mg/L). Furthermore, as the reaction catalyzed by Bcd to produce butyryl-CoA from crotonyl-CoA is a rate-limiting step, we replaced Bcd with Ter, and the modified strain EST produced 77.33 ± 4.79 mg/L ethyl butyrate. Finally, the copy numbers of Ter and SAAT were further increased, and the resulting modified strain EST-dST produced 99.65 ± 7.32 mg/L ethyl butyrate.
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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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