ER-derived COPII-coated vesicles are conventionally targeted to the Golgi. However, during cell stress these vesicles also become a membrane source for autophagosomes, distinct organelles that target cellular components for degradation. How the itinerary of COPII vesicles is coordinated on these pathways remains unknown. Phosphorylation of the COPII coat by casein kinase 1 (CK1), Hrr25, contributes to the directional delivery of ER-derived vesicles to the Golgi. CK1 family members are thought to be constitutively active kinases that are regulated through their subcellular localization. Instead, we show here that the Rab GTPase Ypt1/Rab1 binds and activates Hrr25/CK1δ to spatially regulate its kinase activity. Consistent with a role for COPII vesicles and Hrr25 in membrane traffic and autophagosome biogenesis, hrr25 mutants were defective in ER-Golgi traffic and macroautophagy. These studies are likely to serve as a paradigm for how CK1 kinases act in membrane traffic.
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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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