Subcellular localization of silencing suppressor proteins encoded by two cereal yellow dwarf viruses
Cereal yellow dwarf viruses are among the most destructive cereal viruses worldwide. In this study, subcellular localizations of silencing suppressor proteins ( P0) from two cereal yellow dwarf viruses, Cereal yellow dwarf virus-RPV (CYDV-RPV) and Cereal yellow dwarf virus-RPS (CYDV-RPS), were examined via confocal microscopy. To do so, P0 genes were synthesized by polymerase chain reaction (PCR) and were cloned through Gateway cloning system. Agrobacterium. tumefaciens clones harboring GFP:P0 constructs were infiltrated into Nicotiana benthamiana plants. Transient expression of P0 proteins with N-terminal GPF fusion enabled us to examine their subcellular localizations in plant cells, 24 hours post infiltration. Results showed that both proteins are nuclear-cytoplasmic but different tendencies were observed in their localizations. In other words, P0 of CYDV-RPS was more nuclear oriented than P0 of CYDV-RPV. In the Western blot analysis using GFP polyclonal antibody only GFP:P0 proteins but no free GFP, were detected indicating that localizations were related to GFP:P0 proteins.
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