Description of Hypoviridae

adapted from ICTVdb

Virion Properties

No true viral particles are associate with this virus; vesicles devoid of any detectable viral structural proteins but containing viral nucleic acid can be isolated from infected tissue; pleomorphic vesicles surrounded by rough endoplasmatic reticulum occur in infected tissue, but they do not contain typical viral structures.

Morphology

Vesicles containing viral matter; are poorly characterized and consist of a nucleoprotein complex. Virus capsid is found in membranous vesicles. Virions measure 50-80 nm in diameter.

Physicochemical and Physical Properties

Virions have a buoyant density in CsCl of 1.27-1.3 g cm^-3.

Nucleic Acid

The genome is not segmented and contains a single molecule of linear double-stranded RNA.

Description of Hypoviridae

adapted from ICTVdb

Virion Properties

No true viral particles are associate with this virus; vesicles devoid of any detectable viral structural proteins but containing viral nucleic acid can be isolated from infected tissue; pleomorphic vesicles surrounded by rough endoplasmatic reticulum occur in infected tissue, but they do not contain typical viral structures.

Morphology

Vesicles containing viral matter; are poorly characterized and consist of a nucleoprotein complex. Virus capsid is found in membranous vesicles. Virions measure 50-80 nm in diameter.

Physicochemical and Physical Properties

Virions have a buoyant density in CsCl of 1.27-1.3 g cm^-3.

Nucleic Acid

The genome is not segmented and contains a single molecule of linear double-stranded RNA. The complete genome is 10000-13000 nucleotides long. The 3'-terminus has short a poly (A) tract (of 20-30 nucleotides at the coding strand).

Proteins

The viral genome encodes non-structural proteins.

Lipids

Lipids are present and located in the vesicles encapsidating the viral nucleic acid. The lipids are