Amalgaviridae
| Amalgaviridae | |
|---|---|
| Virus classification | |
| Group: |
Group III (dsRNA)
|
| Order: |
Unassigned
|
| Family: |
Amalgaviridae
|
| Genera | |
|
|
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Amalgaviridae is a family of double-stranded RNA viruses that has one genus: Amalgavirus. Members of both the family and the genus are referred to as amalgaviruses. There are currently four recognized species of the family: Blueberry latent virus,[1] Rhododendron virus A,[2] Southern tomato virus,[3] the type species of Amalgavirus, and Vicia cryptic virus M.[4] The family and genus are called amalga, from amalgam, due to the viruses possessing characteristics of both partitiviruses and totiviruses, indicating a likely genetic relation to those two families.[1][3] Members of this family infect plants and are transmitted vertically via seeds.[1] Their genomes are monopartite, about 3.5 kilobases in length,[2][3] and contain two partially overlapping open reading frames, encoding the RNA-dependent RNA polymerase (RdRp) and a putative capsid protein.[3][4]
Evolution
It has been suggested that amalgaviruses have evolved via recombination between viruses with double-stranded and negative-strand RNA genomes.[5] Specifically, phylogenetic analyses have shown that the amalgavirus RdRps form a sister clade to the corresponding proteins of partitiviruses (Partitiviridae) which have segmented (bipartite) dsRNA genomes and infect plants, fungi and protists.[1][2][3][5] By contrast, the putative capsid protein of amalgaviruses is homologous to the nucleocapsid proteins of negative-strand RNA viruses of the genera Phlebovirus (Bunyaviridae) and Tenuivirus.[5]
References
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