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Mutations in the coat protein-binding cis-acting RNA motifs debilitate RNA recombination of Brome mosaic virus.

Abstract：

:We have previously described the efficient homologous recombination system between 5' subgenomic RNA3a (sgRNA3a) and genomic RNA3 of Brome mosaic virus (BMV) in barley protoplasts (Sztuba-Solińska et al., 2011a). Here, we demonstrated that sequence alterations in the coat protein (CP)-binding cis-acting RNA motifs, the Bbox region (in the intercistronic RNA3 sequence) and the RNA3 packaging element (PE, in the movement protein ORF), reduced crossover frequencies in protoplasts. Additionally, the modification of Bbox-like element in the 5' UTR region strongly debilitated crossovers. Along the lines of these observations, RNA3 mutants not expressing CP or expressing mutated CPs also reduced recombination. A series of reciprocal transfections demonstrated a functional crosstalk between the Bbox and PE elements. Altogether, our data imply the role of CP in sgRNA3a-directed recombination by either facilitating the interaction of the RNA substrates and/or by creating roadblocks for the viral replicase.

journal_name

Virus Res

journal_title

Virus research

authors

Sztuba-Solińska J,Fanning SW,Horn JR,Bujarski JJ

doi

10.1016/j.virusres.2012.10.001

subject

Has Abstract

pub_date

2012-12-01 00:00:00

pages

138-49

issue

1-2

eissn

0168-1702

issn

1872-7492

pii

S0168-1702(12)00371-1

journal_volume

170

pub_type

杂志文章

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