In fission yeast, Schizosaccharomyces pombe, the spnab2 gene encodes an ortholog of the budding yeast nuclear abundant poly(A)(+) RNA-binding protein 2 (Nab2) that is an essential protein required for both mRNA biogenesis and nuclear export of mRNA to the cytoplasm. We have previously isolated three mutants (SLnab1-3) that showed synthetic lethality under the repressed condition of spnab2 expression. In this study, we isolated a novel rmn1 gene as a multicopy suppressor that complemented the defects in growth and mRNA export of SLnab1 mutant cells. The rmn1 gene contained three introns and encoded a 589 amino-acid protein with the RNA recognition motif (RRM) in the central region. The Δrmn1 null mutant was viable but showed a s light mRNA export defect. However, its over-expression caused a deleterious effect on growth accompanied by intense accumulation of poly(A)(+) RNA in the nucleus. The combination of Δrmn1 with Δspnab2 or Δspmex67 also inhibited growth. In addition, Rmn1p was associated with Rae1p in vivo. These results suggest that rmn1 is a novel gene that is functionally linked to spnab2.
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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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