Two complementing mutations in lipid-linked oligosaccharide biosynthesis have been isolated following a [3H]mannose suicide enrichment. Rather than making the wild type precursor oligosaccharide, Glc3man9Glc-NA2-P-P-dolichol, the mutants, alg5-1 and alg6-1, accumulate Man9GlcNAc2-P-P-dolichol as their largest lipid-linked oligosaccharide in vivo and in vitro. When UDP-[3H]Glc was added to microsomal membranes of each mutant, neither could elongate Man9GlcNAc2-P-P-dolichol and only alg6-1 could synthesize dolichol-phosphoglucose. When dolicholphospho[3H]glucose was added to microsomes from alg5-1, alg6-1, or the parental strain, only alg5-1 and the parental strain made glucosylated lipid-linked oligosaccharides. These results indicate that alg5-1 cells are unable to synthesize dolichol phosphoglucose while alg6-1 cells are unable to transfer glucose from dolichol phosphoglucose to the unglucosylated lipid-linked oligosaccharide. We also present evidence that both mutants transfer Man9GlcNAc2 to protein.
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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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