The yeast Dsl1p vesicle tethering complex, comprising the three subunits Dsl1p, Dsl3p, and Tip20p, is stably associated with three endoplasmic reticulum-localized Q-SNAREs and is believed to play a central role in the tethering and fusion of Golgi-derived COP-I transport vesicles. Dsl1p also interacts directly with COP-I subunits. We now show that binding of Dsl1p to COP-I subunits involves binding sites identical to those involved in interactions between COP-I subunits that stabilize the COP-I coat. Cells with defects in Dsl/SNARE complex function show massive accumulation of COP-I-coated vesicles in a cluster to which COP-II coat proteins are also recruited. Our results suggest that binding of Dsl/SNARE complex to the COP-I coat complex serves two functions: to mediate vesicle tethering and to assist the uncoating process by blocking domains in COP-I that drive repolymerization and the formation of large COP-I aggregates.
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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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