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Title

Tacaribe arenavirus RNA synthesis in vitro is primer dependent and suggests an unusual model for the initiation of genome replication

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Published in Journal of Virology. 1992, vol. 66, no. 3, p. 1370-6
Abstract A Tacaribe virus in vitro system for RNA synthesis was established and found in large part to faithfully reproduce RNA synthesis in vivo. Similar to influenza virus and bunyavirus in vitro systems, this system was also highly dependent on added oligonucleotides. Of the eight tested, only three were active, in the order GpC greater than CpG greater than ApApC. Determination of the 5' ends of the transcripts suggested that the oligonucleotides were acting as primers. In particular, whereas stimulation with CpG (complementary to positions +1 and +2 of the template) led to RNAs whose 5' ends were at position +1 as expected, GpC stimulation led to transcripts whose 5' ends were at position -1 rather than at position +2, as GpC is complementary to positions +2 and +3 of the template. This finding suggests a model for the initiation of genome replication in which pppGpC is first made on the template at positions +2 and +3 but slips backwards on the template so that the 5' end is at position -1 before elongation can continue.
Keywords Arenaviridae/geneticsBase SequenceMolecular Sequence DataOligodeoxyribonucleotides/chemistryOligonucleotides/pharmacologyPolymerase Chain ReactionRNA, Viral/biosynthesis/geneticsTranscription, GeneticVirus Replication
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PMID: 1738196
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Article (Published version) (1.6 MB) - document accessible for UNIGE members only Limited access to UNIGE
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Research group Virologie moléculaire (275)
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GARCIN, Dominique, KOLAKOFSKY, Daniel. Tacaribe arenavirus RNA synthesis in vitro is primer dependent and suggests an unusual model for the initiation of genome replication. In: Journal of Virology, 1992, vol. 66, n° 3, p. 1370-6. https://archive-ouverte.unige.ch/unige:37929

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Deposited on : 2014-06-18

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