Chromatin-remodeling complexes regulate access to nucleosomal DNA by mobilizing nucleosomes in an ATP-dependent manner. In this study, we find that chromatin remodeling by SWI/SNF and ISW2 involves DNA translocation inside nucleosomes two helical turns from the dyad axis at superhelical location-2. DNA translocation at this internal position does not require the propagation of a DNA twist from the site of translocation to the entry/exit sites for nucleosome movement. Nucleosomes are moved in 9- to 11- or approximately 50-base-pair increments by ISW2 or SWI/SNF, respectively, presumably through the formation of DNA loops on the nucleosome surface. Remodeling by ISW2 but not SWI/SNF requires DNA torsional strain near the site of translocation, which may work in conjunction with conformational changes of ISW2 to promote nucleosome movement on DNA. The difference in step size of nucleosome movement by SWI/SNF and ISW2 demonstrates how SWI/SNF may be more disruptive to nucleosome structure than ISW2.
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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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