The Multifunctional Long-Distance Movement Protein of Pea Enation Mosaic Virus 2 Protects Viral and Host Transcripts from Nonsense-Mediated Decay.

MBio
Jared P MayAnne E Simon

Abstract

The nonsense-mediated decay (NMD) pathway presents a challenge for RNA viruses with termination codons that precede extended 3' untranslated regions (UTRs). The umbravirus Pea enation mosaic virus 2 (PEMV2) is a nonsegmented, positive-sense RNA virus with an unusually long 3' UTR that is susceptible to NMD. To establish a systemic infection, the PEMV2 long-distance movement protein p26 was previously shown to both stabilize viral RNAs and bind them for transport through the plant's vascular system. The current study demonstrated that p26 protects both viral and nonviral messenger RNAs from NMD. Although p26 localizes to both the cytoplasm and nucleolus, p26 exerts its anti-NMD effects exclusively in the cytoplasm independently of long-distance movement. Using a transcriptome-wide approach in the model plant Nicotiana benthamiana, p26 protected a subset of cellular NMD target transcripts, particularly those containing long, structured, GC-rich 3' UTRs. Furthermore, transcriptome sequencing (RNA-seq) revealed that the NMD pathway is highly dysfunctional during PEMV2 infection, with 1,820 (48%) of NMD targets increasing in abundance. Widespread changes in the host transcriptome are common during plant RNA virus infections, and the...Continue Reading

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Citations

Jul 24, 2020·RNA·Maximilian Wei-Lin PoppLynne E Maquat
Jun 20, 2020·Seminars in Cell & Developmental Biology·Kristoffer Leon, Melanie Ott
Feb 19, 2021·Journal of Virology·Muhammad IlyasAnne E Simon
Dec 21, 2020·Current Opinion in Virology·Jared P May, Anne E Simon
Jul 9, 2021·Environmental Science and Pollution Research International·Shirin Parizad, Sayanta Bera
Aug 5, 2021·Journal of Virology·Chaminda D GunawardeneK Andrew White

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Datasets Mentioned

BETA
AHA85539.1

Methods Mentioned

BETA
PCR
transgenic
fluorescence microscopy
RNA-seq
electrophoresis

Software Mentioned

ImageJ
MEME
AgriGO
Mock
MATLAB
RNAslider
FastQC
Primer3

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