An understanding of the protein-DNA interactions in vivo at origins of DNA replication in eukaryotes is essential to delineate the mechanism of initiation of DNA synthesis and its control in the cell cycle. In the yeast Saccharomyces cerevisiae, a family of sequences known as autonomously replicating sequences (ARSs) function as origins of bidirectional DNA replication on plasmids and, in several instances, also in their normal chromosomal location. Here we use nucleotide resolution genomic footprinting to investigate the association of proteins with ARS1. Nuclease protection patterns indicate that at least two different cellular factors interact with functional elements in ARS1. The first seems to be ARS-binding factor 1. The second seems to be a novel protein that generates extensive protection over the essential ARS consensus sequence and phased DNaseI-sensitive sites across a functionally important flanking sequence. Hypersensitivity of this region to cleavage by copper phenanthroline indicates that it is under torsional strain, analogous to that produced at transcriptional start sites by assembly of an initiation complex. The protection in situ is similar to that generated by the origin recognition complex (ORC) protein.
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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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