The PstI and BamHI fragments, containing the HIS3 (imidazoleglycerol phosphate dehydratase) gene of yeast obtained from pYehis2, and the ColE1-derived plasmid pBR322 were ligated in vitro and used to transform hisB463 strains of Escherichia coli K-12. Expression of the cloned HIS3 gene from yeast was markedly enhanced (3--5-fold) in polynucleotide phosphorylase (pnp)-deficient strains of E. coli. The levels of both HIS3 and plasmid-encoded mRNAs were increased in pnp- strains carrying the chimeric plasmids, whereas there was little difference in the levels of pBR322-specific mRNAs in pnp+ and pnp- strains. This increase in HIS3 mRNA appeared to be related to specific stabilization of the eukaryotic message due to its unique structural features, since the half-life of the HIS3 mRNA increased from 1.5 to 18.7 min, whereas no increase in the half-lives of pBR322 vehicle mRNAs was observed. A physical map of the plasmid pYehis2 was constructed using restriction endonuclease and molecular cloning techniques.
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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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