Linked Life Data

16757010

Source:http://linkedlifedata.com/resource/pubmed/id/16757010

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
2006-8-7
pubmed:abstractText
Turnip crinkle virus (TCV) (family Tombusviridae, genus Carmovirus) is a positive-sense RNA virus containing a 4054-base genome. Previous results indicated that insertion of Hairpin 4 (H4) into a TCV-associated satellite RNA enhanced replication 6-fold in vivo (Nagy, P., Pogany, J., Simon, A. E., 1999. EMBO J. 18:5653-5665). A detailed structural and functional analysis of H4 has now been performed to investigate its role in TCV replication. RNA structural probing of H4 in full-length TCV supported the sequence forming hairpin structures in both orientations in vitro. Deletion and mutational analyses determined that H4 is important for efficient accumulation of TCV in protoplasts, with a 98% reduction of genomic RNA levels when H4 was deleted. In vitro transcription using p88 [the TCV RNA-dependent RNA polymerase] demonstrated that H4 in its plus-sense orientation [H4(+)] caused a nearly 2-fold increase in RNA synthesis from a core hairpin promoter located on TCV plus-strands. H4 in its minus-sense orientation [H4(-)] stimulated RNA synthesis by 100-fold from a linear minus-strand promoter. Gel mobility shift assays indicated that p88 binds H4(+) and H4(-) with equal affinity, which was substantially greater than the binding affinity to the core promoters. These results support roles for H4(+) and H4(-) in TCV replication by enhancing syntheses of both strands through attracting the RdRp to the template.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Aug
pubmed:issn
0042-6822
pubmed:author
pubmed:issnType
Print
pubmed:day
15
pubmed:volume
352
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
39-51
pubmed:dateRevised
2011-9-26
pubmed:meshHeading
pubmed:year
2006
pubmed:articleTitle
A cis-replication element functions in both orientations to enhance replication of Turnip crinkle virus.
pubmed:affiliation
Department of Cell Biology and Molecular Genetics, Microbiology Building, University of Maryland College Park, College Park, MD 20742, USA.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, Non-P.H.S., Research Support, N.I.H., Extramural