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Title: TMV mutants with poly(A) tracts of different lengths demonstrate structural variations in 3′UTR affecting viral RNAs accumulation and symptom expression
Authors: Guo, Song
Kierzek, Elzbieta
Chen, Gang
Zhou, Yi-Jun
Wong, Sek-Man
Keywords: Plant molecular biology
Structure determination
Issue Date: 2015
Source: Guo, S., Kierzek, E., Chen, G., Zhou, Y.-J., & Wong, S.-M. (2015). TMV mutants with poly(A) tracts of different lengths demonstrate structural variations in 3′UTR affecting viral RNAs accumulation and symptom expression. Scientific Reports, 5, 18412-.
Series/Report no.: Scientific Reports
Abstract: The upstream pseudoknots domain (UPD) of Tobacco mosaic virus (TMV) is located at the 3′-untranslated region (UTR). It plays an important role in virus replication and translation. To determine the importance of UPD and 3′-UTR, and the effects of introduced RNA elements in TMV 3′-UTR, a series of TMV mutants with internal poly(A) tract upstream of UPD was constructed for structural analysis by selective 2′-hydroxyl acylation analyzed by primer extension (SHAPE). TMV(24A+UPD) and TMV(42A+UPD) formed a similar structure as that of TMV 3′-UTR, but TMV(62A+UPD) structures altered by the introduced poly(A) tract. In addition, TMV(24A+UPD) had a higher viral RNAs accumulation than TMV in N. benthamiana protoplasts, and induced lethal symptoms in the infected plants. TMV(62A+UPD) showed a drastically reduced accumulation, its coat protein was undetectable in protoplasts, and the inoculated plants remained symptomless. This study analyzed the structures of 3′-UTR of TMV and found that the longer poly(A) tract introduced upstream of UPD reduced viral RNAs accumulation and induced milder symptoms in N. benthamiana. In conclusion, different lengths of the internal poly(A) tract introduced into the TMV 3′UTR lead to structural variations that affect virus accumulation and symptom expression.
ISSN: 2045-2322
DOI: 10.1038/srep18412
Schools: School of Physical and Mathematical Sciences 
Rights: This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit
Fulltext Permission: open
Fulltext Availability: With Fulltext
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