Interference with Physalis mottle tymovirus replication and coat protein synthesis by transcripts corresponding to the 3 '-terminal region of the genomic RNA - role of the pseudoknot structure

Ranjith-Kumar, CT and Haenni, AL and Savithri, HS (1998) Interference with Physalis mottle tymovirus replication and coat protein synthesis by transcripts corresponding to the 3 '-terminal region of the genomic RNA - role of the pseudoknot structure. In: Journal of General Virology, 79 (1). pp. 185-189.

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Abstract

The role of the 3' noncoding (NC) region of Physalis mottle tymovirus genomic RNA in the multiplication of the virus was examined using an in vivo protoplast assay system, Coat protein (CP) synthesis was specifically inhibited by sense 3' NC region transcripts, To establish the role of the pseudoknot structure present in the NC region in virus multiplication, four site-specific mutants, two of which disrupted the pseudoknot structure while the other two restored the structure, were constructed. Interestingly, none of the four sense mutant transcripts inhibited CP synthesis, suggesting that the specific sequence representing the 3' terminal pseudoknot structure may play an important role in virus multiplication. However, the wild-type antisense 3' NC transcript as well as the four antisense mutant transcripts inhibited CP synthesis, suggesting that the inhibitions by antisense transcripts could be due to the formation of RNA-RNA hybrids at the 3' end of the genomic RNA.

Item Type:	Journal Article
Publication:	Journal of General Virology
Publisher:	Society for General Microbiology
Additional Information:	Copyright of this article belongs to Society for General Microbiology.
Department/Centre:	Division of Biological Sciences > Biochemistry
Date Deposited:	26 Aug 2009 17:19
Last Modified:	19 Sep 2010 05:25
URI:	http://eprints.iisc.ac.in/id/eprint/18766

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