Umbravirus
Encyclopedia
The genus Umbravirus includes plant virus
es. The genus has not yet been assigned to a family but it is closely allied to the Tombusviridae
.
Umbraviruses do not encode their own coat protein
, but use the coat proteins of 'assistor viruses' from the family Luteoviridae
to produce virions, allowing them to be transmitted. Transmission may be by aphids or mechanical inoculation. The genome
is a linear, positive-sense, single-stranded RNA
, 4200-6900 nucleotides in length.
Carrot mottle virus is the type species
.
Virus
A virus is a small infectious agent that can replicate only inside the living cells of organisms. Viruses infect all types of organisms, from animals and plants to bacteria and archaea...
es. The genus has not yet been assigned to a family but it is closely allied to the Tombusviridae
Tombusviridae
Tombusviridae is a family of single-stranded positive sense RNA plant viruses. The name is derived from the type species of the Tombusvirus genus, Tomato bushy stunt virus...
.
Umbraviruses do not encode their own coat protein
Capsid
A capsid is the protein shell of a virus. It consists of several oligomeric structural subunits made of protein called protomers. The observable 3-dimensional morphological subunits, which may or may not correspond to individual proteins, are called capsomeres. The capsid encloses the genetic...
, but use the coat proteins of 'assistor viruses' from the family Luteoviridae
Luteoviridae
The Luteoviridae are a family of viruses, including the following genera:*Genus Luteovirus; type species: Barley yellow dwarf virus-PAV*Genus Polerovirus; type species: Potato leafroll virus...
to produce virions, allowing them to be transmitted. Transmission may be by aphids or mechanical inoculation. The genome
Genome
In modern molecular biology and genetics, the genome is the entirety of an organism's hereditary information. It is encoded either in DNA or, for many types of virus, in RNA. The genome includes both the genes and the non-coding sequences of the DNA/RNA....
is a linear, positive-sense, single-stranded RNA
RNA
Ribonucleic acid , or RNA, is one of the three major macromolecules that are essential for all known forms of life....
, 4200-6900 nucleotides in length.
Carrot mottle virus is the type species
Type species
In biological nomenclature, a type species is both a concept and a practical system which is used in the classification and nomenclature of animals and plants. The value of a "type species" lies in the fact that it makes clear what is meant by a particular genus name. A type species is the species...
.