Background: The eukaryotic cell cycle is driven by CDK-cyclin complexes. A number of proteins interact either with CDK or the CDK complex to regulate CDK activity. A search for novel cell cycle regulators in the budding yeast Saccharomyces cerevisiae yielded multicopy suppressors of the cdc2-L7 mutation of the fission yeast, Schizosaccharomyces pombe.
Results: One of the isolated genes was found to encode a putative protein kinase similar to Nim1 of S. pombe and was termed NIK1 (Nim1-like kinase 1). Transcription of NIK1 was periodic and peaked at the G1/S boundary. Although NIK1 is not essential, delta nik1 cells showed G2 delay and hydroxyurea (HU) sensitivity. Anomalously elongated buds were observed in the stationary phase or in the presence of HU. Moreover, DNA was aberrantly distributed in the delta nik1 cdc28 double mutant. Genetical and biochemical evidence suggests that Nik1 interacts with the Cdc28 complex.
Conclusions: Nik is a structural and functional homologue of Nim1. Nik1 interacts with the Cdc28 complex and functions not only at the G2/M transition but also at other points 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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