Repair of DNA double-strand break (DSB) is an evolutionary conserved Rad51-mediated mechanism. In yeasts, Rad51 paralogs, Saccharomyces cerevisiae Rad55-Rad57 and Schizosaccharomyces pombe Rhp55-Rhp57 are mediators of the nucleoprotein RadS1 filament formation. As shown in this work, a novel RAD51Sp-dependent pathway of DSB repair acts in S. pombe parallel to the pathway mediated by Rad51 paralogs. A new gene dds20+ that controls this pathway was identified. The overexpression of dds20+ partially suppresses defects of mutant rhp55delta in DNA repair. Cells of dds20delta manifest hypersensitivity to a variety of genotoxins. Epistatic analysis revealed that dds20+ is a gene of the recombinational repair group. The role of Dds20 in repair of spontaneous damages occurring in the process of replication and mating-type switching remains unclear. The results obtained suggest that Dds20 has functions beyond the mitotic S phase. The Dds20 protein physically interacts with Rhp51 (Rad51Sp). Dds20 is assumed to operate at early recombinational stages and to play a specific role in the Rad51 protein filament assembly differing from that of Rad51 paralogs.
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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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