Nic96p has been isolated previously in a complex together with the nuclear pore proteins Nsp1p, Nup49p and a p54 polypeptide. In a genetic screen for Nsp1p-interacting components, we now find NIC96, as well as a novel gene NUP57 which encodes the p54 protein (called Nup57p). Nup57p which is essential for cell growth contains GLFG repeats in the N-terminal half and heptad repeats in the C-terminal half. The domain organization of Nic96p is more complex: N-terminally located heptad repeats mediate binding to a trimeric Nsp1p-Nup49p-Nup57p complex, but are not required for the formation of this core complex; single amino acid substitutions in the central domain yield thermosensitive mutants, which do not impair interaction with the Nsp1 complex; the C-terminal domain is neither essential nor required for binding to the nucleoporin complex, but strikingly mutations in this part cause synthetic lethality with nsp1 and nup57 mutant alleles. Since a strain in which the Nic96p heptad repeats were deleted shows, similar to nsp1 and nup49 mutants, cytoplasmic mislocalization of a nuclear reporter protein, we propose that the interaction of the heterotrimeric Nsp1p-Nup49p-Nup57p core complex with Nic96p is required for protein transport into the nucleus.
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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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