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Role of the AtRad1p endonuclease in homologous recombination in plants.

Abstract : Using a specific recombination assay, we show in the plant Arabidopsis thaliana that AtRad1 protein plays a role in the removal of non-homologous tails in homologous recombination. Recombination in the presence of non-homologous overhangs is reduced 11-fold in the atrad1 mutant compared with the wild-type plants. AtRad1p is the A. thaliana homologue of the human Xpf and Saccharomyces cerevisiae Rad1 proteins. Rad1p is a subunit of the Rad1p/Rad10p structure-specific endonuclease that acts in nucleotide excision repair and inter-strand crosslink repair. This endonuclease also plays a role in mitotic recombination to remove non-homologous, 3'-ended overhangs from recombination intermediates. The Arabidopsis atrad1 mutant (uvh1), unlike rad1 mutants known from other eukaryotes, is hypersensitive to ionizing radiation. This last observation may indicate a more important role for the Rad1/Rad10 endonuclease in recombination in plants. This is the first direct demonstration of the involvement of AtRad1p in homologous recombination in plants.
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Contributor : Charles White Connect in order to contact the contributor
Submitted on : Wednesday, May 25, 2011 - 4:04:05 PM
Last modification on : Tuesday, April 20, 2021 - 11:22:02 AM

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Sandra Dubest, Maria Gallego, Charles White. Role of the AtRad1p endonuclease in homologous recombination in plants.. EMBO Reports, EMBO Press, 2002, 3 (11), pp.1049-54. ⟨10.1093/embo-reports/kvf211⟩. ⟨inserm-00595819⟩



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