A 140-kDa polypeptide (p140) has been purified over 2000-fold from vegetative Schizosaccharomyces pombe cells using an assay of homologous pairing and strand exchange between linear double-stranded DNA (dsDNA) and circular single-stranded DNA (ssDNA) in vitro. Electron microscopic analysis of the reaction products showed displacement of one strand of the linear duplex DNA by the circular ssDNA molecule. In addition, the protein contained 5' to 3' exonuclease activity on ssDNA and dsDNA (with a 50-fold preference on the single-stranded substrate) as well as on single-stranded RNA. Furthermore, p140 was capable of renaturing complementary ssDNA as shown by S1 nuclease assays. p140 behaved like a monomer in solution under reaction conditions. Direct comparison of the biochemical properties, sequence analysis, and cross-reactivity to a monoclonal antibody suggests that p140 is probably identical with ExoII, purified from S. pombe meiotic cells as a ssDNA exonuclease (Szankasi, P., and Smith, G. R. (1992) Biochemistry 31, 6769-6773). Given the diverse activities of p140, the protein might be involved in DNA and/or RNA metabolism in vivo.
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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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