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rdf:type |
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lifeskim:mentions |
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pubmed:issue |
19
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pubmed:dateCreated |
2003-9-12
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pubmed:abstractText |
Point mutations that resulted in a substitution of the conserved 3'-penultimate cytidine in genomic RNA or the RNA negative strand of the self-amplifying replicon of the Flavivirus Kunjin virus completely blocked in vivo replication. Similarly, substitutions of the conserved 3'-terminal uridine in the RNA negative or positive strand completely blocked replication or caused much-reduced replication, respectively. The same preference for cytidine in the 3'-terminal dinucleotide was noted in reports of the in vitro activity of the RNA-dependent RNA polymerase (RdRp) for the other genera of Flaviviridae that also employ a double-stranded RNA (dsRNA) template to initiate asymmetric semiconservative RNA positive-strand synthesis. The Kunjin virus replicon results were interpreted in the context of a proposed model for initiation of RNA synthesis based on the solved crystal structure of the RdRp of phi6 bacteriophage, which also replicates efficiently using a dsRNA template with conserved 3'-penultimate cytidines and a 3'-terminal pyrimidine. A previously untested substitution of the conserved pentanucleotide at the top of the 3'-terminal stem-loop of all Flavivirus species also blocked detectable in vivo replication of the Kunjin virus replicon RNA.
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pubmed:commentsCorrections |
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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 |
0022-538X
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pubmed:author |
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pubmed:issnType |
Print
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pubmed:volume |
77
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
10623-9
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pubmed:dateRevised |
2009-11-18
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pubmed:meshHeading |
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pubmed:year |
2003
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pubmed:articleTitle |
Significance in replication of the terminal nucleotides of the flavivirus genome.
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pubmed:affiliation |
Sir Albert Sakzewski Virus Research Centre, Royal Children's Hospital, Clinical Medical Virology Centre, University of Queensland, Brisbane, Queensland, Australia.
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pubmed:publicationType |
Journal Article,
Research Support, Non-U.S. Gov't
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