Two so far undetected tRNA genes were found close to delta (delta) sequences at the sup4 locus on chromosome X in the genome of Saccharomyces cerevisiae. The two genes were identified from their abundant transcription products in frog oocytes. Hybridisation experiments allowed the mapping of the transcripts in cloned DNA and DNA sequence analysis revealed the presence of one AGGtRNA and one GACtRNA gene. tRNA genes with sequences similar or identical to GACtRNA exist in 14-16 copies per haploid yeast genome, whereas only one copy was detected for AGGtRNA. In vivo labelling of total yeast tRNA with P followed by hybridisation revealed that the unique AGGtRNA gene is transcribed in S. cerevisiae. delta sequences are present 120 bp upstream from the first coding nucleotide in the case of AGGtRNA, 80 bp in the case of GACtRNA and 405 bp in the case of the known UACtRNA (sup4) gene. delta sequences, as part of Ty elements or alone, were also found by other investigators at similar distances upstream of the mRNA start in mutant alleles of protein-coding yeast genes. Although protein-coding genes are transcribed by RNA polymerase II and tRNA genes by RNA polymerase III, the 5' non-coding region of both types of genes could conceivably have a peculiar DNA or chromatin structure used as preferred landing sites by transposable elements.
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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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