The transcription start site (TSS) is useful to predict gene and to understand transcription initiation. Although vast data on mRNA TSSs are available, little is known about tRNA genes because of rapid processing. Using a tobacco in vitro transcription system under conditions of impaired 5' end processing, TSSs were determined for 64 Arabidopsis tRNA genes. This analysis revealed multiple TSSs distributed in a region from 10 to 2bp upstream of the mature tRNA coding sequence (-10 to -2). We also analyzed 31 Saccharomyces cerevisiae tRNA genes that showed a smaller number but a broader distribution (-13 to -1) of TSSs. In both cases, transcription was initiated preferentially at adenosine, and a common 'TCAACA' sequence was found spanning the TSSs. In plant, this motif caused multiple TSSs to converge at one site and enhanced transcription. The TATA-like sequence upstream of Arabidopsis tRNA genes also contributed to TSS selection.
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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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