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- W2111395315 endingPage "9785" @default.
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- W2111395315 abstract "The 3' nontranslated region of the genomes of Sindbis virus (SIN) and other alphaviruses carries several repeat sequence elements (RSEs) as well as a 19-nucleotide (nt) conserved sequence element (3'CSE). The 3'CSE and the adjoining poly(A) tail of the SIN genome are thought to act as viral promoters for negative-sense RNA synthesis and genome replication. Eight different SIN isolates that carry altered 3'CSEs were studied in detail to evaluate the role of the 3'CSE in genome replication. The salient findings of this study as it applies to SIN infection of BHK cells are as follows: i) the classical 19-nt 3'CSE of the SIN genome is not essential for genome replication, long-term stability, or packaging; ii) compensatory amino acid or nucleotide changes within the SIN genomes are not required to counteract base changes in the 3' terminal motifs of the SIN genome; iii) the 5' 1-kb regions of all SIN genomes, regardless of the differences in 3' terminal motifs, do not undergo any base changes even after 18 passages; iv) although extensive addition of AU-rich motifs occurs in the SIN genomes carrying defective 3'CSE, these are not essential for genome viability or function; and v) the newly added AU-rich motifs are composed predominantly of RSEs. These findings are consistent with the idea that the 3' terminal AU-rich motifs of the SIN genomes do not bind directly to the viral polymerase and that cellular proteins with broad AU-rich binding specificity may mediate this interaction. In addition to the classical 3'CSE, other RNA motifs located elsewhere in the SIN genome must play a major role in template selection by the SIN RNA polymerase." @default.
- W2111395315 created "2016-06-24" @default.
- W2111395315 creator A5011547319 @default.
- W2111395315 creator A5021593726 @default.
- W2111395315 date "2000-10-15" @default.
- W2111395315 modified "2023-09-26" @default.
- W2111395315 title "Alphavirus RNA Genome Repair and Evolution: Molecular Characterization of Infectious Sindbis Virus Isolates Lacking a Known Conserved Motif at the 3′ End of the Genome" @default.
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- W2111395315 doi "https://doi.org/10.1128/jvi.74.20.9776-9785.2000" @default.
- W2111395315 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/112414" @default.
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