Open AccessTargeting the site of RNA-RNA recombination in brome mosaic virus with antisense sequences.
Author(s) -
Peter D. Nagy,
Józef J. Bujarski
Publication year - 1993
Publication title -
proceedings of the national academy of sciences of the united states of america
Language(s) - English
Resource type - Journals
eISSN - 1091-6490
pISSN - 0027-8424
DOI - 10.1073/pnas.90.14.6390
Subject(s) - brome mosaic virus , heteroduplex , rna , recombination , biology , sense (electronics) , genetics , rna virus , insert (composites) , virology , antisense rna , mosaic virus , recombinant dna , microbiology and biotechnology , dna , virus , rna dependent rna polymerase , plant virus , gene , chemistry , mechanical engineering , engineering
It has been postulated that local hybridizations between viral RNAs can mediate recombination in brome mosaic virus (BMV) and in poliovirus. To test this model, a 3' fragment of BMV RNA1 was inserted into the 3' noncoding sequence of BMV RNA3 in an antisense orientation. This resulted in high-frequency nonhomologous crossovers at or near the hybridized region. Insertion of the same RNA1 fragment in a positive-sense orientation did not promote recombination. Modification of the antisense insert by deletion of 3' portions did not affect the sites of crossover. However, modification of the 5' portion shifted the crossovers toward the central part of the heteroduplex region. Our results provide experimental evidence that recombinant crosses can be primed by hybridization between viral RNA molecules.