RADiation sensitive52 (RAD52) mediates RAD51 loading onto single-stranded DNA ends, thereby initiating homologous recombination and catalyzing DNA annealing. RAD52 is highly conserved among eukaryotes, including animals and fungi. This article reports that RAD52 homologs are present in all plants whose genomes have undergone extensive sequencing. Computational analyses suggest a very early RAD52 gene duplication, followed by later lineage-specific duplications, during the evolution of higher plants. Plant RAD52 proteins have high sequence similarity to the oligomerization and DNA binding N-terminal domain of RAD52 proteins. Remarkably, the two identified Arabidopsis thaliana RAD52 genes encode four open reading frames (ORFs) through differential splicing, each of which specifically localized to the nucleus, mitochondria, or chloroplast. The A. thaliana RAD52-1A ORF provided partial complementation to the yeast rad52 mutant. A. thaliana mutants and RNA interference lines defective in the expression of RAD52-1 or RAD52-2 showed reduced fertility, sensitivity to mitomycin C, and decreased levels of intrachromosomal recombination compared with the wild type. In summary, computational and experimental analyses provide clear evidence for the presence of functional RAD52 DNA-repair homologs in plants.
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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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