Two histone acetyltransferases, A and B, have been extracted and partially purified from yeast cells. The purification scheme included ammonium sulfate precipitation, and chromatography on DEAE-Sepharose and Sephadex G-200. The basic properties of both enzymes closely correspond to those of acetyltransferase A and B found in higher eucaryotes. Yeast enzyme A elutes from DEAE-Sepharose prior to acetyltransferase B, and it is activated by low concentrations of DNA and strongly inhibited by p-chloromercuribenzoate (PCMB). Enzyme B is inhibited by DNA over the entire range of concentrations tested and it is less sensitive to PCMB than enzyme A. When assayed with yeast whole histones, enzyme B shows a marked specificity toward histone H4, although H3 and H2B are also accepted as substrates. Enzyme A preferentially catalyzes the acetylation of yeast H2B and H3, with the other two core histones being acetylated to a much lesser extent.
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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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