The interaction of ribosomal protein EL23 from E. coli and L25 from yeast with yeast 26S rRNA was analysed by nitrocellulose filter binding and RNase protection experiments using both intact rRNA and various fragments prepared by in vitro transcription of cloned yeast rDNA regions in the SP6 system. The results show that EL23 efficiently and specifically interacts with the region of 26S rRNA previously identified as the binding site for the yeast ribosomal protein L25. A comparison of the oligonucleotides resulting from limited RNase T1 digestion of the heterologous EL23/26S rRNA complex with those obtained by the same treatment of the homologous L25/26S rRNA complex showed that the molecular details of the two r-protein/rRNA interactions are highly similar if not identical. Using the synthetic 26S rRNA fragments we could demonstrate that all information for the formation of a biologically active binding site is located within the region of the rRNA delimited by the sequences protected by L25 against RNase T1 digestion. Part of the sequence at the 3' end of the 5'-distal protected region, however, was found not to be essential for r-protein binding although it does enhance the efficiency of this binding. Binding experiments using synthetic mouse 28S rRNA fragments showed that neither EL23 nor L25 interact with the structural equivalent of their respective cognate binding sites present in this mammalian rRNA. We argue that the structure of the expansion sequence present in this region of mouse 28S rRNA is a major cause of this failure.
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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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