http://www.cnr.it/ontology/cnr/individuo/prodotto/ID130896

Requirements of trans-acting factors in the replication of Tombusvirus satellite RNAs (Abstract/Poster in convegno)

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Requirements of trans-acting factors in the replication of Tombusvirus satellite RNAs (Abstract/Poster in convegno) (literal)

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Rubino, L., Russo, M. (2009)
Requirements of trans-acting factors in the replication of Tombusvirus satellite RNAs
in I annual meeting SIBV (Società Italiana di Biologia Vegetale), Verona
(literal)

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Satellite RNAs (satRNAs) are subviral RNAs totally dependent on a helper virus-encoded factors for their replication. satRNAs share no or little sequence homology with the helper virus genome and are dispensable for virus propagation. Three satRNAs associated with members of the genus Tombusvirus have been described so far: they are linear single-stranded non-coding RNAs c. 600-800 nt in size, with no sequence homology with the helper, except for a 50 nt region in the satRNA and in the 5 non-coding region of the helper virus genome. The 621 nt satRNA associated with Cymbidium ringspot virus (CymRSV) is not able to attenuate virus-induced symptom expression, is not replicated in protoplasts from transgenic N. benthamiana plants expressing the viral replicase and is target of virus-induced RNA silencing. satB10, a different satRNA associated to Tomato bushy stunt virus in natural infections, attenuates viral symptom expression. It was shown that satB10 replication is supported by the expression of viral replicase proteins only and that satB10 is target of a satRNA-triggered RNA silencing, suggesting that different strategies are required for the replication of different satRNAs. (literal)

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