3-Hydroxyalkanoic acids (3HA) are precious precursors for synthesis of value added chemicals. According to their carbon chain lengths, 3HA can be divided into two groups: short-chain-length (SCL) 3HA consisting of 3-5 carbon atoms and medium-chain-length (MCL) 3HA containing 6-14 carbon atoms. To produce MCL 3HA, a metabolic engineered pathway expressing tesB gene, a thioesterase encoding gene that has been reported to catalyze acyl-CoA to free fatty acids, was constructed in Pseudomonas entomophila L48. When tesB of Escherichia coli encoding thioesterase II was introduced into polyhydroxyalkanoate (PHA) synthase and β-oxidation pathway deleted mutant of P. entomophila LAC31 derived from wild type P. entomophila L48, 6.65g/l 3-hydroxytetradecanoic acid (3HTD) and 4.6g/l 3-hydroxydodecanoic acid (3HDD) were obtained, respectively, when tetradecanoic acid or dodecanoic acid as related carbon sources was added in shake flask cultures. Moreover, 1.8g/l of 3-hydroxydecanoic (3HD) acid was also produced by P. entomophila LAC31 harboring PTE1 gene cloned from Saccharomyces cerevisiae using corresponding fatty acid decanoic acid. Interestingly, shake flask studies indicated that PTE1 harboring strain showed advantages over tesB expressing one for 3HDD and 3HD production, while tesB favored 3HTD production by P. entomophila LAC31. For the first time our study revealed that fine chemicals 3HTD, 3HDD or 3HD could be efficiently produced by metabolic engineered β-oxidation in Pseudomonas spp grown on related fatty acids.
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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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