We have cloned and characterized a homologue of the previously isolated GPD1 gene, encoding sn-glycerol 3-phosphate dehydrogenase (NAD+) in Saccharomyces cerevisiae. This second gene, called GPD2, encodes a protein of 384 amino acids that shares 69% sequence identity with GPD1. Like GPD1 it has an amino-terminal extension of unknown function. GPD2 is located on chromosome VII and cross-hybridizes with GPD1 at chromosome IV as well as with an unknown homologue at chromosome XV. Disruption of the GPD2 gene did not reveal any observable phenotypic effects, whereas overexpression resulted in a slight, but significant, increase of GPD enzyme activity in wild-type cells. Analysis of gene transcription by a CAT-reporter gene fused to the GPD promoters revealed decreased transcriptional activity of the GPD2 promoter in cells grown on nonfermentable as opposed to fermentable carbon sources, and no induction in cells exposed to high osmolarity or heat shock. Similar analysis of GPD1 demonstrated an 8-17-fold higher basal level of transcription compared to GPD2. Furthermore, such analysis revealed that the GPD1 promoter was induced by increased osmolarity essentially independent of the type of stress solute used, the level of GPD1 transcription being increased about sevenfold in cells growing at 1.4 M NaCl.
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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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