Temperature-sensitive nucleoporin nup49-316 mutant cells accumulate poly(A)+ RNA inside the nucleus when shifted to restrictive temperature. We performed a synthetic lethal screen with this mutant allele to identify further components of the mRNA export machinery. A synthetic lethal mutant slv21 was isolated, which exhibited a ts phenotype and showed nuclear accumulation of poly(A)+ RNA at 37 degrees C. The wild-type gene complementing slv21 was cloned and sequenced. It encodes a novel protein Nup133p which is located at the nuclear pore complex. NUP133 is not an essential gene, but cells in which NUP133 is disrupted grow slowly at permissive temperatures and stop growing at 37 degrees C. Concomitant with the growth inhibition, nup133- cells accumulate poly(A)+ RNA inside the nucleus whereas nuclear import of a karyophilic reporter protein is not altered. Strikingly, nup133- cells display extensive clustering of nuclear pore complexes at a few sites on the nuclear envelope. However, the nuclear pore clustering phenotype and intranuclear accumulation of poly(A)+ RNA are not obligatorily linked, since an amino-terminally truncated Nup133p allows normal poly(A)+ RNA export, but does not complement the clustering phenotype of nup133- cells.
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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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