The host factor RAD51 is involved in mungbean yellow mosaic India virus (MYMIV) DNA replication

The host factor RAD51 is involved in mungbean yellow mosaic India virus (MYMIV) DNA replication Geminiviruses replicate their single-stranded genomes with the help of only a few viral factors and various host cellular proteins primarily by rolling-circle replication (RCR) and/or recombination-dependent replication. At RAD51 has been identified, using the phage display technique, as a host factor that potentially interacts with the Rep protein of mungbean yellow mosaic India virus (MYMIV), a member of the genus Begomovirus . In this study, we demonstrate the interaction between MYMIV Rep and a host factor, At RAD51, using yeast two-hybrid and β-galactosidase assays, and this interaction was confirmed using a co-immunoprecipitation assay. The At RAD51 protein complemented the rad51 ∆ mutation of Saccharomyces cerevisiae in an ex vivo yeast-based geminivirus DNA replication restoration assay. The semiquantitative RT-PCR and northern hybridization data revealed a higher level of expression of the Rad51 transcript in MYMIV-infected mungbean than in uninfected, healthy plants. Our findings provide evidence for a possible cross-talk between RAD51 and MYMIV Rep, which essentially controls viral DNA replication in plants, presumably in conjunction with other host factors. The present study demonstrates for the first time the involvement of a eukaryotic RAD51 protein in MYMIV replication, and this is expected to shed light on the machinery involved in begomovirus DNA replication. Archives of Virology Springer Journals

The host factor RAD51 is involved in mungbean yellow mosaic India virus (MYMIV) DNA replication

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Springer Vienna
Copyright © 2013 by Springer-Verlag Wien
Biomedicine; Virology; Medical Microbiology; Infectious Diseases
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