Kobuvirus
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Kobuvirus is a viral genus belong to the family Picornaviridae. They infect vertebrates. Aichi virus is an example of species belonging to this genus.
[edit] Virus particles
The molecular mass of a typical virion particle of this genus is typically eight to nine million (1). The virions of the viruses in this genus consist of regular non-encapsulated capsids that are 27 nm to 30 nm in diameter (1). The capsid is described as being round and displaying icosahedral symmetry (1). The capsid is believed to consist of 12 capsomers and the capsid shell structure of these virions has a monolayer composition (1). Using conventional electron microscopy, the structure of the capsid surface can be visualised stably (1). The virus particles in the virus populations are generally of one exact particle size throughout each population (1). Also, within each of their populations, these virus particles all look identical to one another and only one single species is found in preparations (for electron microscopy) though parts of particles are also commonly found (1). The virus particles do not have nucleic acids (1). These virions have a sedimentation coefficient of 140-165 S20w (1). The particles are described to be “relatively stable” in vitro (in comparison to other viruses) and unstable in acidic conditions of pH 6 (1). They have also been found to be insensitive to treatment with some chemicals including chloroform, ether and non-ionic detergents (1).
[edit] Genetics
The viruses in this genus have single-stranded, linear non-segmented, positive-sense RNA genomes with lengths of 7000-9000 nucleotides (1).
[edit] References
ICTVdB - The Universal Virus Database, version 4. http://www.ncbi.nlm.nih.gov/ICTVdb/ICTVdB/
