GAR1 is a nucleolar protein which is associated with small nucleolar RNAs (snoRNAs) and which is required for pre-ribosomal RNA processing. In Saccharomyces cerevisiae, the GAR1 gene is essential for cell viability. We have cloned and sequenced the GAR1 gene from the distantly related yeast Schizosaccharomyces pombe. The SpGAR1 gene, which contains two small introns, codes for a 194 amino-acid protein of 20 kDa. A protein sequence comparison indicates that SpGAR1 is 65% identical to ScGAR1. Anti-ScGAR1 antibodies recognize SpGAR1, emphasizing the structural conservation of the protein. Immunostaining of S.pombe cells with these antibodies reveals that SpGAR1 is localized in the nucleolus, as is the case in S.cerevisiae. Moreover, SpGAR1 can substitute for GAR1 in S.cerevisiae, indicating that the two proteins are functionally equivalent. These results suggest a parallel evolutionary conservation of proteins and RNAs with which GAR1 interacts in mediating its pre-rRNA processing and viability functions. After fibrillarin, GAR1 is the second protein of the snoRNPs shown to have been conserved throughout evolution.
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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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