Replicators are genetically defined elements within chromosomes that determine the location of origins of DNA replication. In the yeast Saccharomyces cerevisiae, the ARS1 replicator contains multiple functional DNA elements: an essential A element and three important B elements--B1, B2, and B3. Functionally similar A, B1, and B2 elements are also present in the ARS307 replicator. The B3 element binds a replication and transcription enhancer protein Abf1p, whereas the A element is required for binding the origin recognition complex (ORC). The function of the B1 and B2 elements remains to be defined. We have used a gel-based DNA binding assay to study the interaction between replicators and the putative initiator protein ORC. In addition to the established requirements for ATP and the A element for ORC-DNA interaction, the new data demonstrate that sequences in the B1 element are also important for ORC-DNA association. This conclusion is supported by DNase I footprint analyses and demonstrates that ORC binds to a bipartitite recognition element within the DNA. Furthermore, mutation of nucleotides in the B1 element suggests that this element has other functions in the initiation of DNA replication besides participating in the ORC-DNA interaction.
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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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