Comparative study of the effects of heptameric slippery site composition on -1 frameshifting among different eukaryotic systems

Authors:
Plant EP, Dinman JD
In:
Source: RNA
Publication Date: (2006)
Issue: 12(4): 666-73
Research Area:
Cancer Research/Cell Biology
Immunotherapy / Hematology
Cells used in publication:
Jurkat
Species: human
Tissue Origin: blood
Vero
Species: monkey
Tissue Origin: kidney
Platform:
Nucleofectorâ„¢ I/II/2b
Abstract
Studies of programmed -1 ribosomal frameshifting (-1 PRF) have been approached over the past two decades by many different laboratories using a diverse array of virus-derived frameshift signals in translational assay systems derived from a variety of sources. Though it is generally acknowledged that both absolute and relative -1 PRF efficiency can vary in an assay system-dependent manner, no methodical study of this phenomenon has been undertaken. To address this issue, a series of slippery site mutants of the SARS-associated coronavirus frameshift signal were systematically assayed in four different eukaryotic translational systems. HIV-1 promoted frameshifting was also compared between Escherichia coli and a human T-cell line expression systems. The results of these analyses highlight different aspects of each system, suggesting in general that (1) differences can be due to the assay systems themselves; (2) phylogenetic differences in ribosome structure can affect frameshifting efficiency; and (3) care must be taken to employ the closest phylogenetic match between a specific -1 PRF signal and the choice of translational assay system.