The integration of chromosomal DNA replication into the eukaryotic cell cycle might involve temporal regulation of interactions between cellular factors and replication origins. We show here that yeast replication origins exist in two chromatin states during the cell cycle. In the postreplicative state, genomic footprints closely resemble those produced in vitro by the purified ORC and ABF1 proteins, indicating that the binding of these proteins to replication origins is not sufficient to drive the initiation of DNA replication. The prereplicative state is characterized by an additional region of protection overlapping the ORC footprint. This prereplicative complex appears near the end of mitosis and persists through G1. After entry into S phase, origins return to the postreplicative state. Similarities in temporal regulation of the prereplicative state and the Xenopus licensing factor suggest that mechanisms limiting DNA replication to once per cell cycle may be conserved among eukaryotes.
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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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