title: Screening and identification of virus-encoded RNA silencing suppressors.
abstract: RNA silencing, including RNA interference, is a novel method of gene regulation and one of the potent host-defense mechanisms against the viruses. In the course of evolution, the viruses have encoded proteins with the potential to suppress the host RNA silencing mechanism as a counterdefense strategy. The virus-encoded RNA silencing suppressors (RSSs) can serve as important biological tools to dissect the detailed RNA silencing pathways and also to evolve the antiviral strategies. Screening and identification of the RSSs are indeed of utmost significance in the field of plant biotechnology. We describe two Green Fluorescent Protein (GFP) reporter-based plant assay systems that rely on two different principles, namely reversal of silencing and enhancement of rolling circle replication (RCR) of geminiviral replicon. These proof-of-concept examples and assay systems could be used to screen various plant, animal, and insect viral ORFs for identification of the RSS activities.
authors: International Center for Genetic Engineering and Biotechnology, PMB Lab, New Delhi, India.
authors: Sumona
authors: S
authors: Karjee
authors: Mohammad Nurul
authors: MN
authors: Islam
authors: Sunil K
authors: SK
authors: Mukherjee
mesh_terms: D017791:Geminiviridae / Q000235:genetics* / Q000378:metabolism; D020868:Gene Silencing; D017930:Genes, Reporter; D005822:Genetic Vectors / Q000235:genetics / Q000378:metabolism; D049452:Green Fluorescent Proteins / Q000235:genetics / Q000378:metabolism; D016366:Open Reading Frames; D030821:Plants, Genetically Modified / Q000235:genetics / Q000378:metabolism; D034622:RNA Interference; D019076:Transgenes
chemical_list: D049452:Green Fluorescent Proteins