UDP-glucose:dolichyl-phosphate glucosyltransferase is a transmembrane-bound enzyme of the endoplasmic reticulum involved in protein N-linked glycosylation. This enzyme catalyzes the transfer of glucose from UDP-glucose to dolichyl phosphate. The structural gene encoding this transferase from Saccharomyces cerevisiae was isolated by complementation of an alg5-1 mutation. DNA sequencing of ALG5 revealed an open-reading frame of 1002 bases encoding a transmembrane protein of molecular mass 38.3 kDa. Overexpression of Alg5p in both yeast and Escherichia coli results in an increase of UDP-glucose:dolichyl-phosphate glucosyltransferase activity, whereas a deletion of the yeast gene leads to a loss of this activity and a concomitant underglycosylation of carboxypeptidase Y. The ALG5 protein has sequence similarity to the GDP-mannose:dolichyl-phosphate mannosyltransferase (Dpm1p) from S. cerevisiae. Topological studies indicate that UDP-glucose:dolichyl-phosphate glucosyltransferase is a transmembrane protein that spans the membrane several times.
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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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