The efficient repair of double-strand breaks (DSBs) in genomic DNA is crucial for the survival of all organisms. Mnd1 is suggested to promote the strand invasion step during meiotic recombination. We used a forward genetics approach, through the search for mutants, to characterize the Arabidopsis homologue of Mnd1. Atmnd1 null mutants exhibit normal vegetative and flower development. In contrast, during prophase I, chromosomes become fragmented resulting in random distribution of the fragments between polyads. Male and female meiosis are defective and strong accumulation of AtRAD51 was observed in atmnd1-delta1 nuclei. These results suggest that similarly to its yeast and animal homologues, AtMnd1 plays a role in DSB repair during meiosis. In addition, like its human homologue AtMnd1 is expressed in somatic cells. AtMnd1 expression is strongly induced by gamma-rays and null mutants show increased sensibility to gamma-rays. Taken together, these results suggest that AtMnd1 is also required for DSB repair in somatic cells.
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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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