The yeast [PSI+] determinant is related to formation of large prion-like aggregates of the conformationally altered Sup35 protein. Here, we show that these aggregates are composed of small Sup35 prion polymers and associated proteins. In contrast to other protein complexes of yeast lysates, but similarly to amyloid fibers, these polymers are insoluble in SDS at room temperature. The polymers on average are about 30-fold smaller than the aggregates and comprise from 8 to 50 Sup35 monomers. The size of polymers is characteristic of a given [PSI+] variant and differs between the variants. Blocked expression of Hsp104 chaperone causes gradual increase in the size of prion polymers, while inactivation of Hsp104 by guanidine HCl completely stops their fragmentation, which shows indispensability of Hsp104 for this process.
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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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