Following endoplasmic reticulum (ER) stress, eukaryotic cells trigger a conserved signal transduction pathway called the unfolded protein response (UPR) that regulates the ER's capacity to perform protein folding according to cellular demand. In Saccharomyces cerevisiae, the UPR is initiated by Ire1, a type I transmembrane serine/threonine kinase/endoribonuclease, that senses unfolded protein levels within the ER in collaboration with the ER Hsp70-family member, BiP/Kar2. Here, we report on the characterization of the Yarrowia lipolytica Ire1 ortholog. Our results show that Sls1, a nucleotide exchange factor for BiP, has important functions in regulating ER stress and the interaction of BiP and Ire1. They suggest that Sls1 regulates this interaction, by stimulating the conversion of BiP from the ADP-bound to the ATP-bound state, which favors its interaction with Ire1. Moreover, we identified known and new partners for Ire1 using the Tandem Affinity Purification (TAP) approach.
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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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