The non-transcribed spacer (NTS) regions of the linear extrachromosomal palindromic rDNA from the ciliated protozoan Tetrahymena thermophila contain, in addition to sequences regulating transcription, the origin(s) of bidirectional replication as well as telomere associated sequences. These NTS regions function as autonomous replication sequences (ARS) in the yeast Saccharomyces cerevisiae (Kiss, G.B., Amin, A.A. and Pearlman, R.E., Mol. Cell Biol. 1: 535-543, 1981). We have now identified in the 5' NTS two adjacent but non-overlapping restriction fragments which function as ARS in yeast. These fragments contain 200 bp of duplicated sequence and include the in vivo origin of rDNA replication. The ARS in the 3' NTS has been subdivided into a sequence which allows high frequency transformation of yeast but with transformants extremely unstable when grown either under selective or non-selective conditions, and a sequence which appears to be required for plasmid maintenance yet not to be essential for high frequency transformation. Detailed analysis of the DNA sequences in these regions gives rise to interesting information about structural and functional features of the molecule.
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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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