Chromatin alterations, induced by covalent histone modifications, mediate a wide range of DNA-templated processes, including apoptosis. Apoptotic chromatin condensation has been causally linked to the phosphorylation of histone H2B (serine 14 in human; serine 10 in yeast, H2BS10ph) in human and yeast cells. Here, we extend these studies by demonstrating a unidirectional, crosstalk pathway between H2BS10 phosphorylation and lysine 11 acetylation (H2BK11ac) in yeast. We demonstrate that the H2BK11 acetyl mark, which exists in growing yeast, is removed upon H(2)O(2) treatment but before H2BS10ph occurs, in a unidirectional fashion. H2B K11Q mutants are resistant to cell death elicited by H(2)O(2), while H2B K11R mutants that mimic deacetylation promote cell death. Our results suggest that Hos3 HDAC deacetylates H2BK11ac, which in turn mediates H2BS10ph by Ste20 kinase. Together, these studies underscore a concerted series of enzyme reactions governing histone modifications that promote a switch from cell proliferation to cell death.
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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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Evidence ID | Analyze ID | File | Description |
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