Ploidy is stably maintained in most human somatic cells by a sequential and tight coordination of cell cycle events. Undesired whole genome doublings or duplications are frequent in tumours and have been quite recently described as macro-evolutionary events associated with poor prognosis. In vitro and in vivo studies suggest that polyploidy can favour genome instability, facilitate the formation and progression of tumours, and modify their sensitivity to chemotherapeutic agents. Stress is strongly related to changes in ploidy and whole genome doublings. In this review, we summarize different mechanisms that promote polyploidization, describe a new type of stress able to trigger WGDs in S. cerevisiae, histone stress, and provide some examples and theoretical scenarios that support that cancer cells might suffer from this type of stress. We finally highlight some results showing that the kinase SWE1 (Wee1 in humans) has a role in sensing histone levels before cells enter mitosis, thereby avoiding their undesired consequences on chromosome segregation and ploidy control.
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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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