SV40 is a double-stranded, circular DNA virus belonging to the Polyomaviridae ( earlier Papovavirus ) family, Orthopolyomavirus genus.
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Other viral fossils originate from DNA viruses such as hepadnaviruses ( a group that includes hepatitis B ).
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Homologous recombination is the proposed mechanism whereby the DNA virus " human herpesvirus-6 " integrates into human telomeres.
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Its genetic structure corresponds to the class I of the Baltimore classification : dsDNA, being a DNA virus.
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There are certain safe forms of DNA viruses to serve this carrier purpose and integrate into the human genome.
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In theory, researchers would take the needed gene and insert it into the DNA virus that causes the common cold.
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The genomes in this group have some similarity with the Sclerotinia sclerotiorum hypovirulence associated DNA virus 1 which infects fungi.
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Based on these observations, it has been proposed that small DNA viruses have originated via recombination between RNA viruses and plasmids.
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Poxviruses are unique among DNA viruses in that they replicate in the cytoplasm of the cell rather than in the nucleus.
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A virus Cassava associated circular DNA virus that has some similarity to Sclerotinia sclerotiorum hypovirulence associated DNA virus 1 has been isolated.
