The assembly of the prereplicative complex (pre-RC) at the origin of replication in eukaryotes is a highly regulated and highly conserved process that plays a critical role in preventing multiple rounds of DNA replication per cell division cycle. This study analyzes the molecular dynamics of the assembly of Saccharomyces cerevisiae pre-RC in vitro using ARS1 plasmid DNA and yeast whole cell extracts. In addition, pre-RC assembly was reconstituted in vitro using ARS1 DNA and purified origin-recognition complex (ORC), Cdc6p and Cdt1p-Mcm2-7p. The results reveal sequential recruitment of ORC, Cdc6p, Cdt1p and Mcm2-7p on to ARS1 DNA. When Mcm2-7p is maximally loaded, Cdc6p and Cdt1p are released, suggesting that these two proteins are co-ordinately regulated during pre-RC assembly. In extracts from sid2-21 mutant cells that are deficient in CDT1, ORC and Cdc6p bind to ARS1 but Cdt1p and Mcm2-7p do not. However, Mcm2-7p does bind in the presence of exogenous Cdt1p or Cdt1p-Mcm2-7p complex. Cdt1p-Mcm2-7p complex, which was purified from G1-, early S or G2/M-arrested cells, exhibits structure-specific DNA binding, interacting only with bubble- or Y-shape-DNA, but the biological significance of this observation is not yet known.
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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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