Saccharomyces cerevisiae cyclic AMP-dependent protein kinase (A kinase) activity is essential for growth and cell cycle progression. Dependence on A kinase function can be partially relieved by the inactivation of a second kinase encoded by the gene YAK1. We have isolated two new genes, SOK1 and SOK2 (suppressor of kinase), as gene dosage suppressors of the conditional growth defect of several temperature-sensitive A kinase mutants. Overexpression of SOK1, like lesions in YAK1, also restores growth to a strain (tpk1 tpk2 tpk3) lacking all A kinase activity. The SOK1 gene is not essential, but a sok1::HIS3 disruption abrogates suppression of an A kinase defect by yak1. These results suggest that Yak1 and Sok1 define a linear pathway that is partially redundant with that of the A kinase. Activation of Sok1, by SOK1 overexpression or by inactivation of the negative regulator Yak1, renders a cell independent of A kinase function. The implications of such a model are particularly intriguing in light of the nuclear localization pattern of the overexpressed Sok1 protein and the primary sequence homology between SOK1 and a recently described, developmentally regulated mouse gene.
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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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