[PSI(+)] is a prion of the essential translation termination factor Sup35p. Although mammalian prion infections are uniformly fatal, commonly studied [PSI(+)] variants do not impair growth, leading to suggestions that [PSI(+)] may protect against stress conditions. We report here that over half of [PSI(+)] variants are sick or lethal. These "killer [PSI(+)]s" are compatible with cell growth only when also expressing minimal Sup35C, lacking the N-terminal prion domain. The severe detriment of killer [PSI(+)] results in rapid selection of nonkiller [PSI(+)] variants or loss of the prion. We also report variants of [URE3], a prion of the nitrogen regulation protein Ure2p, that grow much slower than ure2Δ cells. Our findings give a more realistic picture of the impact of the prion change than does focus on "mild" prion variants.
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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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