Molecular analysis of the role of IRES stem-loop V in replicative capacities and translation efficiencies of Coxsackievirus B3 mutants
- 20 November 2007
- journal article
- research article
- Published by Springer Science and Business Media LLC in Molecular Biology Reports
- Vol. 36 (2), 255-262
- https://doi.org/10.1007/s11033-007-9174-3
Abstract
Coxsackievirus B3 (CVB3) is a principal viral cause of acute myocarditis in humans and has been implicated in the pathogenesis of dilated cardiomyopathy. The natural genetic determinants of cardiovirulence for CVB3 have not been identified, although using strains engineered in the laboratory, it has been demonstrated elsewhere that, for several wild-type CB3 strains, the primary molecular determinant of cardiovirulence phenotype localizes to the 5′ nontranslated region (5′NTR) and capsid. Stable RNA tetraloop motifs are found frequently in biologically active RNAs. These motifs carry out a wide variety of functions in RNA folding, in RNA–RNA and RNA–protein interactions. A great deal of knowledge about the structures and functions of tetraloop motifs has accumulated largely due to intensive theoretical, biochemical, and biophysical studies on one most frequently occurring family of tetraloop sequences, namely, the GNRA sequence, especially the GNAA sequence conserved in all enteroviruses. Here in this study, through construction of CVB3 chimeric mutants, the predicted stem loop (SL) V within the 5′NTR has been identified as important in determining viral cardiovirulence. Replication assays in HeLa cell monolayers revealed that wild-type CVB3 virus and two of the six mutants constructed here grow efficiently, whereas other mutant viruses replicate poorly. Furthermore, the in vitro translation products from these mutants and wild-type CVB3, demonstrated that the two mutants who replicate efficiently, translated at relatively equivalent amount than the wild-type. However, other mutants demonstrated a low efficiency in their production of protein when translated in a Rabbit Reticulocytes Lysats.Keywords
This publication has 41 references indexed in Scilit:
- Mapping of secondary structure of the spacer region within the 5′-untranslated region of the coxsackievirus B3 RNA: possible role of an apical GAGA loop in binding La protein and influencing internal initiation of translationVirus Research, 2005
- Model for an RNA tertiary interaction from the structure of an intermolecular complex between a GAAA tetraloop and an RNA helixNature, 1994
- An infectious cDNA copy of the genome of a non-cardiovirulent coxsackievirus B3 strain: its complete sequence analysis and comparison to the genomes of cardiovirulent coxsackievirusesArchiv für die gesamte Virusforschung, 1994
- Coxsackievirus B3 from an infectious cDNA copy of the genome is cardiovirulent in miceArchiv für die gesamte Virusforschung, 1992
- Analysis of the functional significance of amino acid residues in the putative NTP-binding pattern of the poliovirus 2C proteinJournal of General Virology, 1992
- Ribosomal RNA identity elements for ricin A-chain recognition and catalysis: Analysis with tetraloop mutantsJournal of Molecular Biology, 1992
- Modelling of the three-dimensional architecture of group I catalytic introns based on comparative sequence analysisJournal of Molecular Biology, 1990
- Tetraloops and RNA foldingNature, 1990
- New model for the secondary structure of the 5′ non-coding RNA of poliovirus is supported by biochemical and genetic data that also show that RNA secondary structure is important in neurovirulenceJournal of Molecular Biology, 1989
- The Coxsackie VirusesAnnual Review of Microbiology, 1955