Skip to Main content Skip to Navigation
Journal articles

The Arabidopsis homologue of Xrcc3 plays an essential role in meiosis.

Abstract : The eukaryotic RecA homologue Rad51 is a key factor in homologous recombination and recombinational repair. Rad51-like proteins have been identified from yeast (Rad55, Rad57 and Dmc1) to vertebrates (Rad51B, Rad51C, Rad51D, Xrcc2, Xrcc3 and Dmc1). These Rad51-like proteins are all members of the genetic recombination and DNA damage repair pathways. The sequenced genome of Arabidopsis thaliana encodes putative homologues of all six vertebrate Rad51-like proteins. We have identified and characterized an Arabidopsis mutant defective for one of these, AtXRCC3, the homologue of XRCC3. atxrcc3 plants are sterile, while they have normal vegetative development. Cytological observation shows that the atxrcc3 mutation does not affect homologous chromosome synapsis, but leads to chromosome fragmentation after pachytene, thus disrupting both male and female gametogenesis. This study shows an essential role for AtXrcc3 in meiosis in plants and possibly in other higher eukaryotes. Furthermore, atxrcc3 cells and plants are hypersensitive to DNA-damaging treatments, supporting the involvement of this Arabidopsis Rad51-like protein in recombinational repair.
Document type :
Journal articles
Complete list of metadatas

https://www.hal.inserm.fr/inserm-00595813
Contributor : Charles White <>
Submitted on : Wednesday, May 25, 2011 - 4:00:01 PM
Last modification on : Wednesday, March 4, 2020 - 11:26:39 AM

Links full text

Identifiers

Collections

Citation

Jean-Yves Bleuyard, Charles White. The Arabidopsis homologue of Xrcc3 plays an essential role in meiosis.. EMBO Journal, EMBO Press, 2004, 23 (2), pp.439-49. ⟨10.1038/sj.emboj.7600055⟩. ⟨inserm-00595813⟩

Share

Metrics

Record views

175