NSP1 is located at the nuclear periphery in yeast and is essential for cell growth. Employing immunoelectron microscopy on yeast cells, we show that NSP1 is located at the nuclear pores. The molecular analysis of the NSP1 protein points to a two domain model: a nonessential domain (the first 603 amino acids) composed of repetitive sequences common to other nuclear proteins and an essential, carboxy-terminal domain (residues 604-823) mediating the vital function of NSP1. The NSP1 carboxy-terminal domain, which shows a heptad repeat organization, affected the correct location of two nuclear proteins: site-specific amino acid substitutions within a predicted alpha-helical structure of this domain caused a temperature-sensitive growth arrest at 37 degrees C and the appearance of NSP1 and NOP1, a nucleolar protein, in the cytosol.
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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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