title: Fig mosaic virus mRNAs show generation by cap-snatching.
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.
authors.affiliation: Department of Plant Pathology, University of California, Davis, CA 95616, USA.
authors.forename: Jeewan Jyot
authors.initials: JJ
authors.lastname: Walia
authors.forename: Bryce W
authors.initials: BW
authors.lastname: Falk
mesh_terms: D001483:Base Sequence; D030681:Ficus / Q000821:virology*; D015967:Gene Expression Regulation, Viral; D008969:Molecular Sequence Data; D010935:Plant Diseases / Q000821:virology*; D010942:Plant Viruses / Q000235:genetics* / Q000378:metabolism; D012315:RNA Caps / Q000235:genetics* / Q000378:metabolism; D012328:RNA Viruses / Q000235:genetics* / Q000378:metabolism; D012367:RNA, Viral / Q000235:genetics* / Q000378:metabolism
chemical_list: D012315:RNA Caps; D012367:RNA, Viral