The establishment of silencing in Saccharomyces cerevisiae is similar to heterochromatin formation in multicellular eukaryotes. Previous batch culture studies determined that the de novo establishment of silencing initiates during S phase and continues for up to five cell divisions for completion. To track silencing phenotypically, we developed an assay that introduces Sir3 protein into individual sir3Delta mutant cells synchronously and then detects the onset of silencing with single-cell resolution. Silencing was completed within the first one to two cell divisions in most cells queried. Moreover, we uncovered unexpected complexity in the contributions of a histone acetyltransferase (Sas2), two histone methytransferases (Dot1 and Set1) and one histone demethylase (Jhd2) to the dynamics of silencing. Our findings showed that removal of methyl modifications at H3K4 and H3K79 were important steps in silent chromatin formation and that Jhd2 and Set1 had competing roles in the process.
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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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