Ring finger protein 8 (RNF8), an FHA/RING domain containing E3 ubiquitin ligase, is critical in supporting genome integrity by facilitating the assembly of multiple DNA repair proteins at DNA lesions following DNA damage. In the present study, a search for novel binding partners of RNF8 was performed using a yeast two‑hybrid screening assay, and small ubiquitin‑like modifier (SUMO)2/3 was identified as one of the major RNF8‑binding candidates. GST pull‑down and immunoprecipitation assays revealed that RNF8 bound directly and noncovalently to SUMO2/3, but not to SUMO1, and that the FHA domain of RNF8 was required for the binding to SUMO2/3. Furthermore, RNF8 co‑localized with SUMO2/3 at sites of DNA lesions in response to ionizing radiation, as revealed by immunofluorescence assay. Survival assay indicated that the depletion of RNF8 and SUMO2/3 resulted in decreased cellular resistance to genotoxic stress. These data suggested that the binding of RNF8 to SUMO2/3 promoted the response to DNA damage.
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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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