title: The recombination mediator RAD51D promotes geminiviral infection.
abstract: To study a possible role for homologous recombination in geminivirus replication, we challenged Arabidopsis recombination gene knockouts by Euphorbia yellow mosaic virus infection. Our results show that the RAD51 paralog RAD51D, rather than RAD51 itself, promotes viral replication at early stages of infection. Blot hybridization analyses of replicative intermediates using one- and two-dimensional gels and deep sequencing point to an unexpected facet of recombination-dependent replication, the repair by single-strand annealing (SSA) during complementary strand replication. A significant decrease of both intramolecular, yielding defective DNAs and intermolecular recombinant molecules between the two geminiviral DNA components (A, B) were observed in the absence of RAD51D. By contrast, DNA A and B reacted differentially with the generation of inversions. A model to implicate single-strand annealing recombination in geminiviral recombination-dependent replication is proposed.
authors.affiliation: Institute of Biomaterials and Biomolecular Systems, Department of Molecular Biology and Plant Virology, University of Stuttgart, Pfaffenwaldring 57, D-70550 Stuttgart, Germany.
authors.forename: Kathrin S
authors.initials: KS
authors.lastname: Richter
authors.affiliation: Génétique, Reproduction et Développement, UMR CNRS 6293-Clermont Université- INSERM U1103 Aubière, France.
authors.forename: Heϊdi
authors.initials: H
authors.lastname: Serra
authors.affiliation: Génétique, Reproduction et Développement, UMR CNRS 6293-Clermont Université- INSERM U1103 Aubière, France.
authors.forename: Charles I
authors.initials: CI
authors.lastname: White
authors.affiliation: Institute of Biomaterials and Biomolecular Systems, Department of Molecular Biology and Plant Virology, University of Stuttgart, Pfaffenwaldring 57, D-70550 Stuttgart, Germany. Electronic address: holger.jeske@bio.uni-stuttgart.de.
authors.forename: Holger
authors.initials: H
authors.lastname: Jeske
mesh_terms: D017360:Arabidopsis / Q000201:enzymology* / Q000821:virology*; D029681:Arabidopsis Proteins / Q000378:metabolism*; D004279:DNA, Viral / Q000378:metabolism; D017791:Geminiviridae / Q000235:genetics* / Q000472:pathogenicity; D011995:Recombination, Genetic; D012097:Repressor Proteins / Q000378:metabolism*; D017422:Sequence Analysis, DNA
chemical_list: D029681:Arabidopsis Proteins; D004279:DNA, Viral; C558450:RAD51D protein, Arabidopsis; D012097:Repressor Proteins
keywords: Arabidopsis thaliana; Begomovirus; Euphorbia yellow mosaic virus; Recombination-dependent replication; Single-strand annealing