A single amino acid in the RNA-dependent RNA polymerase of Plantago asiatica mosaic virus contributes to systemic necrosis.
From a lily isolate of Plantago asiatica mosaic virus (PlAMV-Li), two sub-isolates (Li1 and Li6) were obtained. Although the nucleotide sequences of Li1 and Li6 were highly conserved, they showed different pathogenicity in Nicotiana benthamiana. Li1 caused necrosis, whereas Li6 infected the plant asymptomatically. Inoculation tests with chimeric and point-mutated viruses revealed that amino acid 1154 of the RNA-dependent RNA polymerase (RdRp) contributes to the necrotic symptoms. The accumulation of the mutant viruses, in which amino acid 1154 of the RdRp was exchanged to the wild-type codon in Li1 and Li6, was almost equal.
Ozeki
J
J
Laboratory of Plant Pathology, Department of Agricultural and Environmental Biology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan.
Takahashi
S
S
Komatsu
K
K
Kagiwada
S
S
Yamashita
K
K
Mori
T
T
Hirata
H
H
Yamaji
Y
Y
Ugaki
M
M
Namba
S
S
D000596:Amino Acids; D027762:Lilium / Q000821:virology; D009029:Mosaic Viruses / Q000201:enzymology* / Q000235:genetics / Q000472:pathogenicity*; D010935:Plant Diseases / Q000821:virology*; D017354:Point Mutation; D012324:RNA-Dependent RNA Polymerase / Q000235:genetics*; D016865:Reassortant Viruses / Q000472:pathogenicity*; D014026:Nicotiana; D014764:Viral Proteins / Q000235:genetics*; D014774:Virulence / Q000235:genetics
D000596:Amino Acids; D014764:Viral Proteins; D012324:RNA-Dependent RNA Polymerase