A complex formed between the dimeric aspartyl-tRNA synthetase from yeast (Mr congruent to 125,000) and two molecules of its cognate yeast tRNAAsp (Mr = 24,160) was crystallized using ammonium sulfate as the precipitant. The crucial parameter which governs a successful crystallization is the enzyme tRNA stoichiometry. Crystals are only obtained when the starting solution precisely contains two tRNA molecules for one enzyme molecule. It was demonstrated by electrophoresis, biological activity assays, and crystallographic data that the crystals contain the two components in the same two to one stoichiometric ratio. The crystals, of cubic shape with edges up to 0.8 mm, belong to space group 1432. The cell parameter is 354 A and the asymmetric unit contains one particle of complex. The solvent content is about 78%, higher than the values commonly observed. Although particularly soft, the quality of the crystals is suitable for x-ray diffraction studies up to 7-A resolution.
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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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