Phenotypic reversion of ethanolamine-requiring Saccharomyces cerevisiae cho1 mutants is predominantly due to recessive mutations at genes unlinked to the chromosome V cho1 locus. The recessive suppressors do not correct the primary cho1 defect in phosphatidylserine synthesis but circumvent it with a novel endogenous supply of ethanolamine. One suppressor (eam1) was previously mapped to chromosome X, and 135 suppressor isolates were identified as eam1 alleles by complementation analysis. Additional meiotic recombination studies have identified a second genetic locus, eam2, that falls in the eam1 complementation group but maps close to the centromere of chromosome IV. Although the normal EAM1 and EAM2 alleles are fully dominant over recessive mutant alleles, their dominance fails in diploids heterozygous for defects in both genes simultaneously. The unusual complementation pattern could be explained by interaction of the gene products in formation of the same enzyme.
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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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