satellite virus

Hepatitis delta-like virus in birds and snakes

Hepatitis D virus is a unique human pathogen. With a circular, negative stranded RNA genome of ~1700 nucleotides, it is the smallest known human virus. Formation of the HDV particle depends on co-infection of cells with a helper virus, hepatitis B virus. Once thought to be specific for humans, related viruses have now been identified …

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Satellites – the viral kind

Satellites are subviral agents that differ from viroids because they depend on the presence of a helper virus for their propagation. Satellite viruses are particles that contain nucleic acid genomes encoding a structural protein that encapsidates the satellite genome. Satellite RNAs do not encode capsid protein, but are packaged by a protein encoded in the helper virus genome. Satellite …

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