We have cloned and sequenced the fission yeast (Schizosaccharomyces pombe) fas1+ gene, which encodes the fatty acid synthetase (FAS) beta subunit, by applying a PCR technique to conserved regions in the beta subunit of the alpha6beta6 types of FAS among different organisms. The deduced amino acid sequence of the Fas1 polypeptide, consisting of 2073 amino acids (Mr = 230,616), exhibits the 48.1% identity with the beta subunit from the budding yeast (Saccharomyces cerevisiae). This subunit, with five different catalytic activities, bears four distinct domains, while the alpha subunit, the sequence of which was previously reported by Saitoh et al. (S. Saitoh et al., 1996, J. Cell Biol. 134, 949-961), carries three domains. We have developed a co-expression system of the FAS alpha and beta subunits by cotransformation of two expression vectors, containing the lsd1+/fas2+ gene and the fas1+ gene, into fission yeast cells. The isolated FAS complex showed quite high specific activity, of more than 4000 mU/mg, suggesting complete purification. Its molecular weight was determined by dynamic light scattering and ultracentrifugation analysis to be 2.1-2.4 x 10(6), and one molecule of the FAS complex was found to contain approximately six FMN molecules. These results indicate that the FAS complex from S. pombe forms a heterododecameric alpha6beta6 structure. Electron micrographs of the negatively stained molecule suggest that the complex adopts a unique barrel-shaped cage architecture.
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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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