Long-Range Architecture in a Viral RNA Genome

We have developed a model for the secondary structure of the 1058-nucleotide plus-strand RNA genome of the icosahedral satellite tobacco mosaic virus (STMV) using nucleotide-resolution SHAPE chemical probing of the viral RNA isolated from virions and within the virion, perturbation of interactions d...

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Bibliographic Details
Published in:	Biochemistry (Easton) Vol. 52; no. 18; pp. 3182 - 3190
Main Authors:	Archer, Eva J, Simpson, Mark A, Watts, Nicholas J, O’Kane, Rory, Wang, Bangchen, Erie, Dorothy A, McPherson, Alex, Weeks, Kevin M
Format:	Journal Article
Language:	English
Published:	United States American Chemical Society 07-05-2013
Subjects:	Genome, Viral Microscopy, Atomic Force Models, Molecular Nucleic Acid Conformation RNA, Viral - chemistry RNA, Viral - genetics Tobacco mosaic virus Tobacco Mosaic Virus - genetics
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Summary:	We have developed a model for the secondary structure of the 1058-nucleotide plus-strand RNA genome of the icosahedral satellite tobacco mosaic virus (STMV) using nucleotide-resolution SHAPE chemical probing of the viral RNA isolated from virions and within the virion, perturbation of interactions distant in the primary sequence, and atomic force microscopy. These data are consistent with long-range base pairing interactions and a three-domain genome architecture. The compact domains of the STMV RNA have dimensions of 10–45 nm. Each of the three domains corresponds to a specific functional component of the virus: The central domain corresponds to the coding sequence of the single (capsid) protein encoded by the virus, whereas the 5′ and 3′ untranslated domains span signals essential for translation and replication, respectively. This three-domain architecture is compatible with interactions between the capsid protein and short RNA helices previously visualized by crystallography. STMV is among the simplest of the icosahedral viruses but, nonetheless, has an RNA genome with a complex higher-order structure that likely reflects high information content and an evolutionary relationship between RNA domain structure and essential replicative functions.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0006-2960 1520-4995
DOI:	10.1021/bi4001535