The influence of posttranscription silensing protein-suppressor P19 on the transient gfp gene expression level in aztec tobacco plants (Nicotiana rustica L.)

  • O. I. Varchenko
  • M. S. Dzuh
  • M. F. Parii
  • Yu. V. Symonenko
DOI: https://doi.org/10.7124/FEEO.v26.1262

Abstract

Aim. Genetic constructs creation for studying the influence effect of the viral posttranscriptional silencing protein suppressor p19 on transient reporter green fluorescent protein (GFP) expression and accumulation. Methods. The Golden Gate molecular cloning method was used to create the genetic constructs; the leafy tissues of the Aztec tobacco plants (Nicotiana rustica L.) were infiltrated with a suspension of Agrobacterium tumefaciens L.; the gfp gene expression level was determined by spectrofluorometric and quantitative protein (Bradford method) assays. Results. As a result of the work, the pSPV2324 genetic construct was created, which contained the reporter gene for the green fluorescent protein gfp and the gene for the synthesis of the viral posttranscriptional silencing protein suppressor p19 and its effect on the accumulation of the recombinant GFP protein was determined. A comparative analysis of the gfp gene expression level without and with the suppressor protein synthesis gene in the genetic vector showed that the fluorescence level of GFP protein in Aztec tobacco tissues was 1.3 times higher during spectrofluorimetric analysis using the p19 suppressor gene construct. Conclusions. The positive effect of the viral suppressor silencing P19 gene on the accumulation of recombinant GFP protein in tissues plants of N. rustica L. was shown for the first time. The increase in GFP protein fluorescence when using the p19 suppressor protein construct in spectrofluorimetric analysis coincides with an increase in the total concentration of total water-soluble proteins and the level fluorescence of GFP protein in their native electrophoretic separation.

Keywords: cloning, genetic constructs, transient expression, silencing protein suppressor p19, green fluorescent protein (GFP).

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