In complex with the prolyl isomerase FKBP12, the natural product rapamycin blocks signal transduction in organisms as diverse as yeast and man. The yeast targets of FKBP12-rapamycin, TOR1 and TOR2, are large proteins with homology to lipid and protein kinases. A mammalian FKBP12-rapamycin binding protein, RAFT1, shares 39% and 43% identity with TOR1 and TOR2 proteins, respectively but has not been linked to rapamycin action in vivo. We find that when expressed in yeast, neither wild-type nor mutant RAFT1 complemented tor mutations or conferred rapamycin resistance. In contrast, TOR1-RAFT1 and TOR1-RAFT1 hybrid proteins containing the carboxy-terminal RAFT1 kinase domain complemented tor2 and tor1 mutant strains, respectively. Moreover, TOR2-RAFT1 and TOR1-RAFT1 hybrid proteins mutated at the position corresponding to rapamycin-resistant TOR mutants (S20351) conferred rapamycin resistance. Like the TOR2 protein, the TOR2-RAFT1 proteins were stably expressed, localized to the vacuolar surface, and associated with a phosphatidylinositol-4 kinase activity. These findings directly link the mammalian TOR homolog RAFT1 to rapamycin action in vivo and indicate that the TOR/RAFT1 kinase domain has been functionally conserved from yeast to man.
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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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