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Development of Bean pod mottle virus-based vectors for stable protein expression and sequence-specific virus-induced gene silencing in soybean.

Abstract：

:Plant virus-based vectors provide valuable tools for expression of foreign proteins in plants and for gene function studies. None of the presently available virus vectors is suitable for use in soybean. In the present study, we produced Bean pod mottle virus (BPMV)-based vectors that are appropriate for gene expression and virus-induced gene silencing (VIGS) in soybean. The genes of interest were inserted into the RNA2-encoded polyprotein open reading frame between the movement protein (MP) and the large coat protein (L-CP) coding regions. Additional proteinase cleavage sites were created to flank the foreign protein by duplicating the MP/L-CP cleavage site. To minimize the chances of homologous recombination and thus insert instability, we took advantage of the genetic code degeneracy and altered the nucleotide sequence of the duplicated regions without affecting amino acid sequences. The recombinant BPMV constructs were stable following several serial passages in soybean and relatively high levels of protein expression were attained. Successful expression of several proteins with different biological activities was demonstrated from the BPMV vector. These included the reporter proteins GFP and DsRed, phosphinothricin acetyltransferase (encoded by the herbicide resistance bar gene), and the RNA silencing suppressors encoded by Tomato bushy stunt virus, Turnip crinkle virus, Tobacco etch virus, and Soybean mosaic virus. The possible use of BPMV as a VIGS vector to study gene function in soybean was also demonstrated with the phytoene desaturase gene. Our results suggest that the BPMV-based vectors are suitable for expression of foreign proteins in soybean and for functional genomics applications.

journal_name

Virology

journal_title

Virology

authors

Zhang C,Ghabrial SA

doi

10.1016/j.virol.2005.08.046

subject

Has Abstract

pub_date

2006-01-20 00:00:00

pages

401-11

issue

2

eissn

0042-6822

issn

1096-0341

pii

S0042-6822(05)00561-1

journal_volume

344

pub_type

杂志文章

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