The N-terminal sequence of the catalytic subunit of fission yeast DNA polymerase alpha (pol alpha) contains two putative nuclear localization signals (NLS). To check the functionality of these signals in vivo, the N-terminal sequence was experimentally divided into three amino acid blocks, two of which contain a distinct presumptive NLS. Each block was deleted, either individually or in combination with one of the two others. The deleted gene products were expressed in fission yeast, and assayed by indirect immunofluorescence for their aptitude to localize to the cell nucleus. Block II, which contains the putative NLS pentapeptide 97RKRKK, was both necessary and sufficient to promote nuclear import of pol alpha, as well as of a pyruvate kinase fusion protein. Precise excision of the NLS pentapeptide from block II inhibited the nuclear import of pol alpha, thus confirming the role of this sequence as the functional NLS of the fission yeast enzyme.
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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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