Resonances of the water exchangeable iminoprotons of the tertiary structure of yeast tRNAPhe were studied by experiments involving Nuclear Overhauser Effects (NOE's). Direct NOE evidence is presented for the assignment of all resonances of iminoprotons participating in tertiary basepairing (except that of G19C56 which was assigned by an elimination procedure). The present results in conjunction with our previous assignment of secondary iminoprotons constitute for the first time a complete spectral assignment of all iminoprotons participating in basepairing in yeast tRNAPhe. In addition we have been able to assign the non(internally) hydrogen bonded N1 proton of psi 55 as well as the N3 proton of this residue, which is one of the two iminoprotons hydrogen bonded to a phosphate group according to X-ray results. No evidence could be obtained for the existence in solution of the other iminoproton-phosphate interaction: that between U33 N3H and P36 located in the anticodon loop. Remarkable is the assignment of a resonance at 12.4 - 12.5 ppm to the iminoproton of the tertiary basepair T54m1A58. The resonance positions obtained for the iminoprotons of G18 (9.8 ppm) and m2(2)G26 (10.4 ppm) are surprisingly far upfield considering that these protons are involved in hydrogen bonds according to X-ray diffraction results. As far as reported by changes in chemical shifts of iminoproton resonances the main structural event induced by Mg++ ions takes place near the tertiary interactions U8A14 and G22m7G46.
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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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