Characteristics of the monocistronic genome of extra small virus, a virus-like particle associated with Macrobrachium rosenbergii nodavirus: possible candidate for a new species of satellite virus.
White tail disease (WTD) causes a high mortality rate in the freshwater prawn Macrobrachium rosenbergii. The pathogenic agent is a small virus, 25 nm in diameter, Macrobrachium rosenbergii nodavirus (MrNV), associated with extra small virus (XSV), a virus-like particle,15 nm in diameter. Sequencing of the XSV genome showed that it consists of a linear single-stranded RNA of 796 nucleotides, encoding a single structural protein, the capsid CP-17. The genome is in sense orientation, ended by a short poly(A) tail at the 3'-end. Sequence comparison did not allow XSV to be affiliated to known virus families. The hypothesis that XSV is a satellite virus, such as those described in the plant kingdom, is put forward based on its characteristics. It would constitute, therefore, the first satellite virus associated with a nodavirus.
Widada
Joannes Sri
JS
Pathogens and Immunity, CNRS, Université Montpellier II, Case 080, 34095 Montpellier Cedex 5, France.
Bonami
Jean-Robert
JR
Pathogens and Immunity, CNRS, Université Montpellier II, Case 080, 34095 Montpellier Cedex 5, France.
D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D005814:Genes, Viral; D016679:Genome, Viral; D008969:Molecular Sequence Data; D030381:Nodaviridae / Q000145:classification* / Q000235:genetics* / Q000302:isolation & purification; D033541:Palaemonidae / Q000821:virology*; D016415:Sequence Alignment; D017386:Sequence Homology, Amino Acid; D015678:Viral Structural Proteins / Q000737:chemistry / Q000235:genetics
D015678:Viral Structural Proteins