TMV mutants with poly(A) tracts of different lengths demonstrate structural variations in 3′UTR affecting viral RNAs accumulation and symptom expression

10Citations
Citations of this article
26Readers
Mendeley users who have this article in their library.

This article is free to access.

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.

Cite

CITATION STYLE

APA

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. https://doi.org/10.1038/srep18412

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free