We have cloned and sequenced the PGI1 gene, encoding phosphoglucose isomerase (E.C.5.3.1.9), from Saccharomyces cerevisiae. The nucleotide sequence predicts subunits of 554 amino acids with a molecular weight of 61,230. Both the size and amino acid composition correlate well with measurements from purified protein. We have compared the PGI1 protein with the predicted sequence for pig muscle PGI. In spite of some evolutionary divergence the proteins are very similar and there are some highly conserved regions, two of which have been implicated in the active site. It has been suggested that PGI exists in two or more isozyme forms in S. cerevisiae and analogy with ADR2/ADC1 suggests that such PGI isozymes might also be differentially regulated during glycolytic/gluconeogenic growth. We have used accurate quantitation of PGI1 mRNA and gene fusions of PGI1 to the lacZ gene of Escherichia coli to show that PGI1 transcription is regulated neither between glycolytic and gluconeogenic growth nor between exponential and stationary phase. The complete lack of PGI activity in PGI1 deletion mutants and of differential regulation suggests that the isozymes of PGI might result merely from processing of the PGI1 gene product.
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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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