A gene encoding a fatty acid synthase component, FAS1, has been cloned from a genomic library of the polyunsaturated fatty acid (PUFA)-producing yeast Saccharomyces kluyveri. This gene (named Sk-FAS1) was found to contain an open reading frame of 6150 bp, coding for 2049 amino acids. The deduced Sk-FAS1 protein showed significant (75-59%) homology with FAS proteins from the other yeasts, including S. cerevisiae, Candida albicans and Yarrowia lipolytica. The substrate-binding sites of the acetyl transferase and malonyl/palmitoyl transferase domains, and the FMN- and NADPH-binding sites of the enoyl reductase domain, were all highly conserved. Expression of the Sk-FAS1 gene in S. cerevisiae complemented genetic disruption of the S. cerevisiae FAS1 gene (Sc-FAS1), suggesting the formation of a heterogeneous complex of Sk-FAS1 (beta) and Sc-FAS2 (alpha), which is able to function to synthesize fatty acids. Compared with the isogenic wild-type of S. cerevisiae, as well as S. kluyveri, the S. cerevisiae fas1 mutant carrying the Sk-FAS1 gene showed an increase in the relative amount of 16-carbon fatty acids and a decrease in 18-carbon 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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