The Saccharomyces cerevisiae HUT1 gene (scHUT1) and the Schizosaccharomyces pombe hut1(+) gene (sphut1(+)) encode hydrophobic proteins with approximately 30% identity to a human UDP-galactose transporter-related gene (UGTrel1) product. These proteins show a significant similarity to the nucleotide sugar transporter and are conserved in many eukaryotic species, but their physiological functions are not known. Both scHUT1 and sphut1(+) genes are non-essential for cell growth under normal conditions, and their disruptants show no defects in the modification of O- and N-linked oligosaccharides, but are sensitive to a membrane-permeable reducing agent, dithiothreitol (DTT). Consistent with this phenotype, scHUT1 has genetic interaction with ERO1, which plays an essential role in the oxidation of secretory proteins at the endoplasmic reticulum (ER). Overexpression of the MPD1 or MPD2 genes, which were isolated as multicopy suppressors of protein disulphide isomerase (PDI) depletion, could not replace the essential function of PDI in Delta hut1 S. cerevisiae cells. Our results indicate that scHut1p and spHut1p are functional homologues, and their physiological function is to maintain the optimal environment for the folding of secretory pathway proteins in the ER.
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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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