The genome of plants, like that of other eukaryotes, is organized into chromatin, a compact structure that reduces the accessibility of DNA to machineries such as transcription, replication, and DNA recombination and repair. Plant genes, which contain the characteristic ATPase/helicase motifs of the chromatin remodeling Swi2/Snf2 family of proteins, have been thoroughly studied, but their role in homologous recombination or DNA repair has received limited attention. We have searched for homologs of the yeast RAD54 gene, whose role in recombination and repair and in chromatin remodeling is well established. Forty Arabidopsis SWI2/SNF2 genes were identified and the function of a selected group of 14 was analyzed. Mutant analysis and/or RNAi-mediated silencing showed that 11 of the 14 genes tested played a role in response to DNA damage. Two of the 14 genes were involved in homologous recombination between inverted repeats. The putative ortholog of RAD54 and close homologs of ERCC6/RAD26 were involved in DNA damage response, suggesting functional conservation across kingdoms. In addition, genes known for their role in development, such as PICKLE/GYMNOS and PIE1, or in silencing, such as DDM1, turned out to also be involved in DNA damage response. A comparison of ddm1 and met1 mutants suggests that DNA damage response is affected essentially by chromatin structure and that cytosine methylation is less critical. These results emphasize the broad involvement of the SWI2/SNF2 family, and thus of chromatin remodeling, in genome maintenance and the link between epigenetic and genetic processes.
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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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Evidence ID | Analyze ID | File | Description |
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