A yeast gene encoding SSB-1, a single-stranded nucleic acid binding protein, has been isolated by screening a lambda gt11 genomic DNA library. The gene is located on a 1.84-kilobase chromosomal Bgl II-BamHI fragment. Yeast strains carrying the high-copy-number vector YEp24 with an SSB1 gene insert overproduce SSB-1 3-fold and SSB-1 mRNA 10-fold. A typical haploid cell contains about 20,000 molecules of SSB-1; thus, the cells can tolerate up to 60,000 copies. Yeast SSB-1 was expressed in Escherichia coli cells by using a phage T7 expression system. Spores containing the gene disrupted at a point within the coding sequence germinate and grow normally; thus, the gene is not essential. Protein blots show that no SSB-1 or novel immunologically related species that might retain SSB-1 activity are present in cells containing the disrupted SSB1 genes. Southern analysis and protein blots suggest the presence in yeast of a second, related, but nonidentical gene and two immunologically related proteins of 55 kDa and 75 kDa.
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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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