Notes on Family: Hypoviridae

no particles
no particles

Contents

General Description

This family currently consists of the single genus Hypovirus. The viruses do not produce virions and cause hypovirulence in their phytopathogenic fungus hosts. They were originally thought to have a dsRNA genome but it is now believed that the dsRNA found in vesicles in infected fungi is a replicative form of the RNA.

Morphology

There are no virions, although vesicles 50-80nm in diameter containing dsRNA and polymerase activity can be found in infected fungi.

Genomen

Monopartite, linear, single stranded RNA of about 10-13 kbp. The 3' terminus has a poly(A) tract and the 5' terminus is blocked in some members. Isolates often contain additional shorter length or satellite-like dsRNAs, the function of which are not known.

Genera in the Family

There is currently only one genus: