The packaging of eukaryotic DNA into nucleosomes is a critical regulator of nuclear events. To address the interplay between chromatin and replication initiation, we have assessed the determinants and function of the nucleosomal configuration of S. cerevisiae replication origins. Using in vitro and in vivo assays, we demonstrate that the yeast initiator, the origin recognition complex (ORC), is required to maintain the nucleosomal configuration adjacent to origins. Disruption of the ORC-directed nucleosomal arrangement at an origin interferes with initiation of replication, but does not alter the association of ORC with the origin. Instead, the nucleosomes positioned by ORC are important for prereplicative complex formation. These findings suggest that origin-proximal nucleosomes facilitate replication initiation, and that local chromatin structure affects origin function.
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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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