We have characterized a DNA sequence that functions in recognition of the promoter of the mitochondrial large rRNA gene by the yeast mtRNA polymerase. Promoter-containing DNA fragments were mutagenized and used as templates to study initiation of transcription in vitro with a partially purified mtRNA polymerase preparation. Deletion mutants, in which increasing stretches of DNA were removed from regions flanking the promoter, define a short area essential for correct initiation of transcription. It virtually coincides with a highly conserved stretch of nine nucleotides that is found immediately upstream of all transcriptional start sites described thus far. Two different point mutations within this nonanucleotide sequence drastically reduce promoter function. Conversely a single point mutation that results in the formation of a nonanucleotide sequence 99 nucleotides upstream of the large rRNA gene leads to a new, efficient transcription initiation site. MtRNA polymerase can be resolved into two different components by chromatography on Blue Sepharose: one retaining the capacity to synthesize RNA, the other conferring the correct specificity of initiation to the catalytic component.
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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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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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