We report in vitro studies showing that tRNA gene transcription in yeast is down-regulated during the transition from logarithmic to stationary phase growth. Transcription in a postdiauxic (early stationary) phase extract of a wild-type strain decreased 3-fold relative to a log phase extract. This growth stage-related difference in transcription was amplified to 20-fold in extracts of a strain containing a mutation (pcf1-4) in the 131-kDa subunit of TFIIIC. The reduction in transcription activity in both wild-type and mutant postdiauxic phase extracts was correlated with a decrease in the amount of TFIIIB70, the limiting factor in these extracts. However, the 3.7 +/- 0.5-fold decrease in amount of TFIIIB70 in mutant extracts does not, by itself, account for the 20-fold decrease in transcription. Accordingly, transcription in the mutant postdiauxic phase extract could be reconstituted to a level equal to the mutant log phase extract by the addition of two components, TFIIIB70 and TFIIIC. Addition of TFIIIB70 increased transcription 10-fold, while a 2-fold effect of TFIIIC was seen at saturating levels of TFIIIB70. The data suggest that both TFIIIB70 and TFIIIC play a role in coordinating the level of polymerase III transcription with cell growth rate.
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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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