A specific fraction of chromosomal DNA from both yeast and a wide variety of other eukaryotes, but not from Escherichia coli, promotes high-frequency transformation in yeast. The plasmids containing these sequences are maintained as extra-chromosomal molecules in transformed cells. These results suggest that similar or identical sequences are used for the initiation of DNA replication in eukaryotes. To test this hypothesis, several foreign eukaryotic DNAs implicated directly or indirectly in the initiation of DNA replication have been examined for their ability to promote autonomous, extrachromosomal replication in yeast. Simian virus 40 DNA, amplified Xenopus laevis ribosomal DNA, X. laevis 5S ribosomal DNA, X. laevis mtDNA, and five different members of the Alu I family of human middle repetitive DNAs were cloned into the vector YIp5 and used to transform yeast. Of these DNAs, only Xenopus mtDNA promoted high-frequency transformation and extrachromosomal maintenance of YIp5 DNA. A 2.2-kilobase EcoRI fragment from the 17.4-kilobase mtDNA molecule was responsible for these activities. This fragment contains the sequence used for the initiation of replication in Xenopus mitochondria.
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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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