The chromatin elements targeted by the ATPdependent, Swi-Snf nucleosome-remodeling complex are unknown. To address this question, we generated mutations in yeast histone H2B that suppress phenotypes associated with the absence of Swi-Snf. Sin- (Swi-Snf-independent) mutations occur in residues involved in H2A-H2B dimer formation, dimer- tetramer association, and in the H2B N-terminus. The strongest and most pleiotropic Sin- mutation removed 20 amino acid residues from the H2B N-terminus. This mutation allowed active chromatin to be formed at the SUC2 locus in a snf5Delta mutant and resulted in hyperactivated levels of SUC2 mRNA under inducing conditions. Thus, the H2B N-terminus may be an important target of Swi-Snf in vivo. The GCN5 gene product, the catalytic subunit of several nuclear histone acetytransferase complexes that modify histone N-termini, was also found to act in conjunction with Swi-Snf. The phenotypes of double gcn5Deltasnf5Delta mutants suggest that histone acetylation may play both positive and negative roles in the activity of the Swi-Snf-remodeling factor.
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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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