Fig mosaic virus mRNAs show generation by cap-snatching

Virology
Jeewan Jyot Walia, B W Falk

Abstract

Fig mosaic virus (FMV), a member of the newly described genus Emaravirus, has four negative-sense single-stranded genomic RNAs, and each codes for a single protein in the viral complementary RNA (vcRNA). In this study we show that FMV mRNAs for genome segments 2 and 3 contain short (12-18 nucleotides) heterogeneous nucleotide leader sequences at their 5' termini. Furthermore, by using the high affinity cap binding protein eIF4E(K119A), we also determined that a 5' cap is present on a population of the FMV positive-sense RNAs, presumably as a result of cap-snatching. Northern hybridization results showed that the 5' capped RNA3 segments are slightly smaller than the homologous vcRNA3 and are not polyadenylated. These data suggest that FMV generates 5' capped mRNAs via cap-snatching, similar to strategies used by other negative-sense multipartite ssRNA viruses.

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Citations

Jun 6, 2016·Virus Research·Patrick L Di BelloIoannis E Tzanetakis
Nov 22, 2012·Viruses·Nicole Mielke-Ehret, Hans-Peter Mühlbach
Oct 13, 2017·The Journal of General Virology·Abdennour AmrounGilles Querat
Sep 12, 2018·The Journal of General Virology·Toufic Elbeaino Ictv Report Consortium
Aug 21, 2020·Molecular Plant-microbe Interactions : MPMI·Jeanmarie VerchotDavid Byrne
Apr 19, 2017·Critical Reviews in Microbiology·Abdennour AmrounGilles Quérat
Jun 3, 2021·Viruses·Richard KormelinkCecile Desbiez

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