Sda1 is an essential protein required for cell cycle progression in Saccharomyces cerevisiae. Here, we show that the sda1-1 mutation causes a defect in the formation and nuclear export of 60S ribosomal subunits. Moreover, the sda1-1, but also other mutants defective in ribosome biogenesis (e.g., rix1-1 and tif6Delta), exhibit a G1 arrest, which could be the consequence of impaired ribosome biogenesis. Interestingly, additional deletion of the non-essential Swe1 kinase, the homolog of S. pombe Wee1, causes a pronounced delay in entering a new cell cycle in sda1-1, rix1-1 and tif6Delta cells, when shifted back from restrictive to permissive conditions. However, such a prolonged delay is independent of the Tyr19 phosphorylation in Cdc28. Moreover, the lack of Swe1 causes delay in budding and DNA replication in cells released from the G1 arrest due to the block of protein synthesis. Our data suggest that Swe1 is required for timely entry into cell cycle after a G1 arrest caused by impairment in pre-60S biogenesis and in protein synthesis. Therefore we propose that Swe1, which is required for coordination of cell growth and cell division in G2/M, also has a role in the beginning of the cell cycle.
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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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