| Literature DB >> 1731118 |
T H Tzeng1, C L Tu, J A Bruenn.
Abstract
The large double-stranded RNA of the Saccharomyces cerevisiae (yeast) virus has two large overlapping open reading frames on the plus strand, one of which is translated via a -1 ribosomal frameshift. Sequences including the overlapping region, placed in novel contexts, can direct ribosomes to make a -1 frameshift in wheat germ extract, Escherichia coli and S. cerevisiae. This sequence includes a consensus slippery sequence, GGGUUUA, and has the potential to form a pseudoknot 3' to the putative frameshift site. Based on deletion analysis, a region of 71 nucleotides including the potential pseudoknot and the putative slippery sequence is sufficient for frameshifting. Site-directed mutagenesis demonstrates that the pseudoknot is essential for frameshifting.Entities:
Mesh:
Substances:
Year: 1992 PMID: 1731118 PMCID: PMC240802
Source DB: PubMed Journal: J Virol ISSN: 0022-538X Impact factor: 5.103