Using either permeabilized cells or microsomes we have reconstituted the early events of the yeast secretory pathway in vitro. In the first stage of the reaction approximately 50-70% of the prepro-alpha-factor, synthesized in a yeast translation lysate, is translocated into the endoplasmic reticulum (ER) of permeabilized yeast cells or directly into yeast microsomes. In the second stage of the reaction 48-66% of the ER form of alpha-factor (26,000 D) is then converted to the high molecular weight Golgi form in the presence of ATP, soluble factors and an acceptor membrane fraction; GTP gamma S inhibits this transport reaction. Donor, acceptor, and soluble fractions can be separated in this assay. This has enabled us to determine the defective fraction in sec23, a secretory mutant that blocks ER to Golgi transport in vivo. When fractions were prepared from mutant cells grown at the permissive or restrictive temperature and then assayed in vitro, the acceptor Golgi fraction was found to be defective.
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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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| Evidence ID | Analyze ID | File | Description |
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