rdf:type |
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lifeskim:mentions |
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pubmed:issue |
10
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pubmed:dateCreated |
2006-9-29
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pubmed:abstractText |
The 3'-untranslated regions (UTRs) of a group of novel uncapped viral RNAs allow efficient translation initiation at the 5'-proximal AUG. A well-characterized model is the Barley yellow dwarf virus class of cap-independent translation elements (BTE). It facilitates translation by forming kissing stem-loops between the BTE in the 3'-UTR and a BTE-complementary loop in the 5'-UTR. Here we investigate the mechanisms of the long-distance interaction and ribosome entry on the RNA. Upstream AUGs or 5'-extensions of the 5'-UTR inhibit translation, indicating that, unlike internal ribosome entry sites in many viral RNAs, the BTE relies on 5'-end-dependent ribosome scanning. Cap-independent translation occurs when the kissing sites are moved to different regions in either UTR, including outside of the BTE. The BTE can even confer cap-independent translation when fused to the 3'-UTR of a reporter RNA harboring dengue virus sequences that cause base-pairing between the 3'- and 5'-ends. Thus, the BTE serves as a functional sensor to detect sequences capable of long-distance base-pairing. We propose that the kissing interaction is repeatedly disrupted by the scanning ribosome and re-formed in an oscillating process that regulates ribosome entry on the RNA.
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pubmed:grant |
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pubmed:commentsCorrections |
http://linkedlifedata.com/resource/pubmed/commentcorrection/16921068-10376873,
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http://linkedlifedata.com/resource/pubmed/commentcorrection/16921068-9671055
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pubmed:language |
eng
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pubmed:journal |
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pubmed:citationSubset |
IM
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pubmed:chemical |
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pubmed:status |
MEDLINE
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pubmed:month |
Oct
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pubmed:issn |
1355-8382
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pubmed:author |
|
pubmed:issnType |
Print
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pubmed:volume |
12
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
1893-906
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pubmed:dateRevised |
2011-6-1
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pubmed:meshHeading |
pubmed-meshheading:16921068-3' Untranslated Regions,
pubmed-meshheading:16921068-5' Untranslated Regions,
pubmed-meshheading:16921068-Base Sequence,
pubmed-meshheading:16921068-Dengue Virus,
pubmed-meshheading:16921068-Luteovirus,
pubmed-meshheading:16921068-Models, Biological,
pubmed-meshheading:16921068-Molecular Sequence Data,
pubmed-meshheading:16921068-Nucleic Acid Conformation,
pubmed-meshheading:16921068-Protein Biosynthesis,
pubmed-meshheading:16921068-RNA, Viral,
pubmed-meshheading:16921068-RNA Caps,
pubmed-meshheading:16921068-Ribosomes
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pubmed:year |
2006
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pubmed:articleTitle |
Oscillating kissing stem-loop interactions mediate 5' scanning-dependent translation by a viral 3'-cap-independent translation element.
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pubmed:affiliation |
Molecular, Cellular, and Developmental Biology Program and Plant Pathology Department, Iowa State University, Ames, Iowa 50011, USA.
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pubmed:publicationType |
Journal Article,
Research Support, Non-U.S. Gov't,
Research Support, N.I.H., Extramural
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