RSC, an essential chromatin remodeling complex in budding yeast, is involved in a variety of biological processes including transcription, recombination, repair, and replication. How RSC participates in such diverse processes is not fully understood. In vitro, RSC uses ATP to carry out several seemingly distinct reactions: it repositions nucleosomes, transfers H2A/H2B dimers between nucleosomes, and transfers histone octamers between pieces of DNA. This raises the intriguing mechanistic question of how this molecular machine can use a single ATPase subunit to create these varied products. Here, we use a FRET-based approach to kinetically order the products of the RSC reaction. Surprisingly, transfer of H2A/H2B dimers and histone octamers is initiated on a time scale of seconds when assayed by FRET, but formation of stable nucleosomal products occurs on a time scale of minutes when assayed by native gel. These results suggest a model in which RSC action rapidly generates an unstable encounter intermediate that contains the two exchange substrates in close proximity. This intermediate then collapses more slowly to form the stable transfer products seen on native gels. The rapid, biologically relevant time scale on which the transfer products are generated implies that such products can play key roles in vivo.
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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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