Because of its chiralic alpha-phosphorus atom adenosine 5'-O-(1-thiotriphosphate) (ATPalphaS) exists in two diastereomeric forms, arbitrarily named (A) and (B). For phenylalanyl-tRNA synthetase ATPalphaS (A) is a substrate whereas ATPalphaS (B) is neither a substrate nor an inhibitor. During the ATPalphaS (A)/PPi exchange reaction with phenylalanyl-tRNA synthetase the configuration at the alpha-phosphorus is retained. The mechanistic implications of these findings are discussed. Preliminary investigations with several other aminoacyl-tRNA synthetases show that the stereochemical requirement with respect to the alpha-phosphorus of ATP is not identical for all aminoacyl-tRNA synthetases.
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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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