Nucleoside diphosphate kinase (NDPK) is the major enzyme responsible for the synthesis of all nucleoside triphosphates except ATP. A gene (YNK) encoding NDPK was isolated from the yeast Saccharomyces cerevisiae. The coding region consists of 459 bp encoding 153 amino acid (aa) residues. The M(r) of NDPK, calculated from the deduced aa sequence, is 17,166. Yeast NDPK was 59% and 58% identical to the rat NDPK alpha and beta, respectively. Overexpression of YNK in yeast showed high NDPK activity. The overproduced NDPK cross-reacted with anti-NDPK antibody raised against rat NDPK by Western blot analysis. Despite the fact that NDPK has features of a housekeeping enzyme, disruption of the YNK locus in a haploid strain was neither lethal nor significantly affected phenotypic behaviors such as growth rate, spore formation, mating ability and morphology. Yeast with a defective YNK still possessed NDPK activity to approximately 10% of the wild-type level. Possible sources of the remaining enzyme activity are discussed.
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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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