DNA replication origins are licensed in early G(1) phase of the cell cycle where the origin recognition complex (ORC) recruits the minichromosome maintenance (MCM) helicase to origins. These pre-replicative complexes (pre-RCs) remain inactive until replication is initiated in the S phase. However, transcriptional activity in the regions of origins can eliminate their functionality by displacing the components of pre-RC from DNA. We analyzed genome-wide data of mRNA and cryptic unstable transcripts in the context of locations of replication origins in yeast genome and found that at least one-third of the origins are transcribed and therefore might be inactivated by transcription. When investigating the fate of transcriptionally inactivated origins, we found that replication origins were repetitively licensed in G(1) to reestablish their functionality after transcription. We propose that reloading of pre-RC components in G(1) might be utilized for the maintenance of sufficient number of competent origins for efficient initiation of DNA replication in S phase.
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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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| Evidence ID | Analyze ID | File | Description |
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