Pospiviroidae

Pospiviroidae

taxobox | color=violet
name = "Pospiviroidae"
virus_group = Viroids
familia = "Pospiviroidae"
subdivision_ranks = Genera
subdivision = "Pospiviroid"
"Hostuviroid"
"Cocadviroid"
"Apscaviroid"
"Coleviroid"The Pospiviroidae are a family of viroids, including the first viroid to be discovered, PSTVd. Their secondary structure is key to their biological activity. The classification of this family is based on differences in the conserved central region sequence. The genome consists (in this order) of an LH terminal domain, a pathogenic domain, conserved central domain, variable domain, and an RH terminal domain. "Pospiviroidae" replication occurs in an asymmetric fashion via host cell RNA polymerase, RNase, and RNA ligase.

Taxonomy

*Family Pospiviroidae
**Genus "Pospiviroid"; type species: "Potato spindle tuber viroid"
**Genus "Hostuviroid"; type species: "Hop stunt viroid"
**Genus "Cocadviroid"; type species: "Coconut cadang-cadang viroid"
**Genus "Apscaviroid"; type species: "Apple scar skin viroid"
**Genus "Coleviroid"; type species: "Coleus blumei viroid 1"

External links

* [http://www-micro.msb.le.ac.uk/3035/Viroids.html] - extensive information on pospivirioidae and viroids.


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