The gene encoding yeast processing alpha glucosidase I, CWH41, was overexpressed in Saccharomyces cerevisiae AH22, resulting in a 28-fold increase in expression of the soluble form of the enzyme. The soluble enzyme results from proteolytic cleavage between residues Ala 24 and Thr 25 of the transmembrane sequence of the membrane-bound form of the enzyme. This cleavage could be partially inhibited by addition of leupeptin and pepstatin during the enzyme isolation. The enzyme was purified to a final specific activity of 8550 U/mg protein using a combination of ammonium sulfate precipitation, anion exchange, concanavalin A, and gel filtration chromatography. The soluble form of the enzyme is a monomer with a molecular weight of 98 kDa by SDS-PAGE, and 89 kDa by gel filtration. The molecular weight decreased by approximately 5 kDa after treatment with N-glycosidase F, indicating that it is a glycoprotein. Soluble glucosidase I was sensitive to diethyl pyrocarbonate and not affected by N-ethylmaleimide, suggesting that mechanistically it is more similar to the plant than the mammalian form of the enzyme.
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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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