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The fusellovirus SSV2 from an Icelandic Sulfolobus strain was isolated, characterized and its complete genomic sequence determined. SSV2 is very similar in morphology, replication, genome size and number of open reading frames (ORFs) to the type virus of the family, SSV1 from Japan, except in its high level of uninduced virus production. The nucleotide sequences are, however, only 55% identical to...
We describe a novel lipothrixvirus, SIFV, of the crenarchaeotal archaeon Sulfolobus islandicus. SIFV (S. islandicusfilamentous virus) has a linear virion with a linear double-stranded DNA genome. These two features coincide in several crenarchaeotal but not in any other viruses. The SIFV core is formed by a zipper-like array of DNA-associated protein subunits and is covered by a lipid envelope containing...
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