The 25-amino-acid leader peptide present at the 5' end of yeast CPA1 mRNA is responsible for the translational repression of that gene by arginine. We show here that the active domain of the yeast peptide is highly specific and extends over amino acids 6-23. The region between amino acids 6-21 is well conserved between similar peptides present upstream of CPA1-homologous genes in other fungi. The Neurospora crassa arg-2 peptide represses the expression of CPA1, whereas the peptide from Aspergillus nidulans has only a weak regulatory effect. Such results suggest that the N- and C-terminal amino acids of the peptide may influence its regulatory activity. We also show that the transcription start sites of CPA1 are not modified when the cells are grown in the presence of arginine, nor in a strain carrying an inactive peptide.
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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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