Cyclin-dependent protein kinases have a central role in cell cycle regulation. In Saccharomyces cerevisiae, Cdc28 kinase and the G1 cyclins Cln1, 2 and 3 are required for DNA replication, duplication of the spindle pole body and bud emergence. These three independent processes occur simultaneously in late G1 when the cells reach a critical size, an event known as Start. At least one of the three Clns is necessary for Start. Cln3 is believed to activate Cln1 and Cln2, which can then stimulate their own accumulation by means of a positive feedback loop. They (or Cln3) also activate another pair of cyclins, Clb5 and 6, involved in initiating S phase. Little is known about the role of Clns in spindle pole body duplication and budding. We report here the isolation of a gene (CLA2/BUD2/ERC25) that codes for a homologue of mammalian Ras-associated GTPase-activating proteins (GAPs) and is necessary for budding only in cln1 cln2 cells. This suggests that Cln1 and Cln2 may have a direct role in bud formation.
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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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