The Pat1 protein of Saccharomyces cerevisiae was identified during a screen for proteins that interact with topoisomerase II. Previously, we have shown that pat1 delta mutants exhibit a slow-growth phenotype and an elevated frequency of both mitotic and meiotic chromosome mis-segregation. Here, we have studied the effects of deleting the PAT1 gene on chromosomal stability, with particular reference to rates of homologous recombination within the rDNA locus. This locus was analyzed because rDNA-specific hyperrecombination is known to occur in conditional top2 mutants. We show that pat1 delta strains mimic top2 mutants in displaying an elevated rate of intrachromosomal excision recombination at the rDNA locus, but not elsewhere in the genome. The elevated rate of recombination is dependent upon Rad52p, but not upon Rad51p or Rad54p. However, pat1 delta strains display additional manifestations of more general genomic instability, in that they show mild sensitivity to UV light and an increased incidence of interchromosomal recombination between heteroalleles.
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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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