TOR complex 1 (TORC1) is a multi-protein kinase complex that coordinates cellular growth with environmental cues. Recent studies have identified Pib2 as a critical activator of TORC1 in budding yeast. Here, we show that loss of Pib2 causes severe growth defects in fission yeast cells, particularly when basal TORC1 activity is diminished by hypomorphic mutations in tor2, the gene encoding the catalytic subunit of TORC1. Consistently, TORC1 activity is significantly compromised in the tor2 hypomorphic mutants lacking Pib2. Moreover, as in budding yeast, fission yeast Pib2 localizes to vacuolar membranes via its FYVE domain, with its tail motif indispensable for TORC1 activation. These results strongly suggest that Pib2-mediated positive regulation of TORC1 is evolutionarily conserved between the two yeast species.
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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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