The Saccharomyces cerevisiae prion [URE3] is the infectious amyloid form of the Ure2p protein. [URE3] provides a useful model system for studying amyloid formation and stability in vivo. When grown in the presence of a good nitrogen source, [URE3] cells are able to take up ureidosuccinate, an intermediate in uracil biosynthesis, while cells lacking the [URE3] prion can not. This ability to take up ureidosuccinate has been commonly used to assay for the presence of [URE3]. However, this assay has a number of practical limitations, affecting the range of experiments that can be performed with [URE3]. Here, we describe recently developed alternative selection methods for the presence or absence of [URE3]. They make use of the Ure2p-regulated DAL5 promoter in conjunction with ADE2, URA3, kanMX, and CAN1 reporter genes, and allow for higher stringency in selection both for and against [URE3], nonselective assay of prion variants, and direct transformation of prion filaments. We discuss advantages and limitations of each of these assays.
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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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