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.
Pathogens and Immunity, CNRS, Université Montpellier II, Case 080, 34095 Montpellier Cedex 5, France.
Joannes Sri
JS
Widada
Pathogens and Immunity, CNRS, Université Montpellier II, Case 080, 34095 Montpellier Cedex 5, France.
Jean-Robert
JR
Bonami
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