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Korean Society for Biochemistry and Molecular Biology (생화학분자생물학회)
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Replication and encapsidation of recombinant Turnip yellow mosaic virus RNA

  • Shin, Hyun-Il (Division of Life Sciences, Chungbuk National University) ;
  • Kim, In-Cheol (Division of Life Sciences, Chungbuk National University) ;
  • Cho, Tae-Ju (Division of Life Sciences, Chungbuk National University)
  • Published : 2008.10.31
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Abstract

Turnip yellow mosaic virus (TYMV) is a positive strand RNA virus that infects mainly Cruciferae plants. In this study, the TYMV genome was modified by inserting an extra subgenomic RNA promoter and a multiple cloning site. This modified TYMV was introduced into Nicotiana benthamiana using a Agrobacterium-mediated T-DNA transfer system (agroinfiltration). When a gene encoding $\beta$-glucuronidase or green fluorescent protein was expressed using this modified TYMV as a vector, replication of the recombinant viruses, especially the virus containing $\beta$-glucuronidase gene, was severely inhibited. The suppression of replication was reduced by co-expression of viral silencing suppressor genes, such as tombusviral p19, closteroviral p21 or potyviral HC-Pro. As expected, two subgenomic RNAs were produced from the recombinant TYMV, where the larger one contained the foreign gene. An RNase protection assay revealed that the recombinant subgenomic RNA was encapsidated as efficiently as the genuine subgenomic RNA.

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References

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