Histone proteins associate with and compact eukaryotic nuclear DNA to form chromatin. The basic unit of chromatin is the nucleosome, which is made up of 146 base pairs of DNA wrapped around two of each of four core histones, H2A, H2B, H3 and H4. Chromatin structure and its regulation are important in transcription and DNA replication. We therefore thought that DNA-damage signalling and repair components might also modulate chromatin structure. Here we have characterized a conserved motif in the carboxy terminus of the core histone H2A from Saccharomyces cerevisiae that contains a consensus phosphorylation site for phosphatidylinositol-3-OH kinase related kinases (PIKKs). This motif is important for survival in the presence of agents that generate DNA double-strand breaks, and the phosphorylation of this motif in response to DNA damage is dependent on the PIKK family member Mec1. The motif is not necessary for Mec1-dependent cell-cycle or transcriptional responses to DNA damage, but is required for efficient DNA double-strand break repair by non-homologous end joining. In addition, the motif has a role in determining higher order chromatin structure. Thus, phosphorylation of a core histone in response to DNA damage may cause an alteration of chromatin structure that facilitates DNA repair.
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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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