Abstract
Members of the family Thaspiviridae have linear dsDNA genomes of 27 to 29 kbp and are the first viruses known to infect mesophilic ammonia-oxidizing archaea of the phylum Thaumarchaeota. The spindle-shaped virions of Nitrosopumilus spindle-shaped virus 1 possess short tails at one pole and measure 64±3 nm in diameter and 112±6 nm in length. This morphology is similar to that of members of the families Fuselloviridae and Halspiviridae. Virus replication is not lytic but leads to growth inhibition of the host. This is a summary of the International Committee on Taxonomy of Viruses (ICTV) Report on the family Thaspiviridae, which is available at ictv.global/report/thaspiviridae.
Highlights
Members of the family Thaspiviridae have linear dsDNA genomes of 27 to 29 kbp and are the first viruses known to infect mesophilic ammonia-oxidizing archaea of the phylum Thaumarchaeota
Protein-primed family B DNA polymerase is involved in viral DNA replication Not characterized Ammonia-oxidizing archaea of the genus Nitrosopumilus Single genus with one species
When associated with the host cells, some virions are observed as elongated structures, with long thin tails connected to the cell surface [3, 4]
Summary
Members of the family Thaspiviridae have linear dsDNA genomes of 27 to 29 kbp and are the first viruses known to infect mesophilic ammonia-oxidizing archaea of the phylum Thaumarchaeota. Example: Virion Genome Replication Translation Host range Taxonomy Nitrosopumilus spindle-shaped virus 1 (MK570053), species Nitmarvirus NSV1, genus Nitmarvirus Spindle-shaped, measuring 64±3 nm in diameter and 112±6 nm in length, with short fibres at one pole. Linear dsDNA (27–29 kbp) with 176 bp terminal inverted repeats Non-lytic, chronic infection.
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