We study here the binding of ribosomes to the endoplasmic reticulum (ER) membrane and its dependence on nascent polypeptide-associated complex (NAC). For this, we use an in vitro translation system in combination with isolated microsomes. Importantly, all components in the system are derived from a single source, Saccharomyces cerevisiae. Ribosome nascent chains (RNCs) of the two naturally occurring invertase species (secreted or cytosolic) were prepared in wild-type, delta alpha NAC or delta alpha beta 1 beta 3 NAC translation lysates and tested for binding to the corresponding microsomal membranes. We provide evidence that NAC prevents binding of RNCs without a signal sequence to yeast membranes. In the absence of NAC, signal-less RNCs are able to bind to ER membranes. However, following puromycin treatment, only very few nascent chains translocate into the lumen, as detected by glycosylation.
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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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