We isolated a fission yeast putative protein serine/threonine phosphatase gene designated ppe1+ by hybridization. The predicted amino acid sequence is similar to those of the fission yeast ppa2 (53% identity) and dis2 (39%) phosphatases, and highly similar to those of the budding yeast SIT4 (72%), Drosophila PPV (68%) and rabbit PPX (61%) phosphatases. Antibodies against ppe1 protein identified a 37-kd polypeptide in fission yeast. A gene disruption (designated delta ppe1) caused cold-sensitive lethality and short, pear-shaped cells. These phenotypes were fully suppressed by a plasmid carrying ppe1+. Three classes of multicopy suppressor genes for delta ppe1 were identified as follows: 1) ppa1+ and ppa2+ encoding type 2A-like phosphatases, 2) mitotically essential dis3+ similar to the budding yeast SSD1/SRK1, a suppressor for sit4, and 3) pck1+ coding for a protein kinase C-like kinase. Consistently, the budding yeast SIT4 gene was also a multicopy suppressor for delta ppe1. Phosphatase ppe1 may play a role in cell morphogenesis and mitosis by either regulating or being regulated by these multicopy suppressor gene products. Consistent with this hypothesis, double mutants ppe1-ppa2 and ppe1-pck1 are lethal at the permissive temperature.
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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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