Many misfolded endoplasmic reticulum (ER) proteins are eliminated by ERAD, a process in which substrates are polyubiquitylated and moved into the cytosol for proteasomal degradation. We have identified in S. cerevisiae distinct ubiquitin-ligase complexes that define different ERAD pathways. Proteins with misfolded ER-luminal domains use the ERAD-L pathway, in which the Hrd1p/Hrd3p ligase forms a near stoichiometric membrane core complex by binding to Der1p via the linker protein Usa1p. This core complex associates through Hrd3p with Yos9p, a substrate recognition protein in the ER lumen. Substrates with misfolded intramembrane domains define a pathway (ERAD-M) that differs from ERAD-L by being independent of Usa1p and Der1p. Membrane proteins with misfolded cytosolic domains use the ERAD-C pathway and are directly targeted to the Doa10p ubiquitin ligase. All three pathways converge at the Cdc48p ATPase complex. These results lead to a unifying concept for ERAD that may also apply to mammalian cells.
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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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