U14 is a small nucleolar RNA (snoRNA) required for early cleavages of eukaryotic precursor rRNA. The U14 RNA from Saccharomyces cerevisiae is distinguished from its vertebrate homologues by the presence of a stem-loop domain that is essential for function. This element, known as the Y-domain, is located in the U14 sequence between two universal sequences that base pair with 18S rRNA. Sequence data obtained for the U14 homologues from four additional phylogenetically distinct yeasts showed the Y-domain is not unique to S.cerevisiae. Comparison of the five Y-domain sequences revealed a common stem-loop structure with a conserved loop sequence that includes eight invariant nucleotides. Conservation of these features suggests that the Y-domain is a recognition signal for an essential interaction. Several plant U14 RNAs were found to contain similar structures, though with an unrelated consensus sequence in the loop portion. The U14 gene from the most distantly related yeast, Schizosaccharomyces pombe, was found to be active in S.cerevisiae, showing that Y-domain function is conserved and that U14 function can be provided by variants in which the essential elements are embedded in dissimilar flanking sequences. This last result suggests that U14 function may be determined solely by the essential elements.
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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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