The HIS1 gene of Saccharomyces cerevisiae encodes ATP phosphoribosyltransferase, the first enzyme in the pathway of histidine biosynthesis. We have cloned this gene by complementation of a his1 auxotroph. The HIS1 coding region was localized within the cloned segment by assay of subcloned fragments for their ability to complement a his1 auxotroph. We determined the DNA sequence of the HIS1 region defined by this complementation test. S1 nuclease and exonuclease VII mapping of the 5' and 3' termini of HIS1 mRNA reveal considerable heterogeneity at both ends of the transcript, especially the 5' end which displays 13 different termini that span a 110-base pair region. Northern analysis shows that derepression of HIS1 enzyme activity under conditions of amino acid deprivation can be accounted for by an increase in the steady state level of HIS1 mRNA. There are no large differences between the relative levels of HIS1 mRNA molecules with different 5' termini in repressed and derepressed cells. In the DNA sequence upstream from the 5' termini of HIS1 mRNA we have found four closely related copies of a 9-base pair sequence. This sequence is also repeated in the 5' noncoding regions of HIS4, HIS3, and TRP5. Closely related sequences are not found flanking a number of other yeast genes, suggesting that the repeated sequence plays a role in the regulation of amino acid biosynthetic genes subject to the general amino acid control.
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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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