Sulfolobus islandicus filamentous virus
Sulfolobus islandicus filamentous virus (SIFV) is an archaeal virus, classified in the family Lipothrixviridae within the order Ligamenvirales. The virus infects hypethermophilic and acidophilic archaeon Sulfolobus islandicus.[1]
| Sulfolobus islandicus filamentous virus | |
|---|---|
Virus classification  | |
| (unranked): | Virus |
| Realm: | incertae sedis |
| Kingdom: | incertae sedis |
| Phylum: | incertae sedis |
| Class: | incertae sedis |
| Order: | Ligamenvirales |
| Family: | Lipothrixviridae |
| Genus: | Betalipothrixvirus |
| Species: | Sulfolobus islandicus filamentous virus |
SIFV has a linear double-stranded DNA genome of 40,852 bp, which is the largest among characterized lipothrixviruses. The virions are enveloped filaments, nearly 2 micrometers in length. The nucleocapsid is formed from two paralogous major capsid proteins, which tightly wrap around the dsDNA genome; notably, dehydration of the genomic DNA by the major capsid proteins transforms the B-form DNA into A-form DNA.[2]
References
- Arnold, Hans Peter; Zillig, Wolfram; Ziese, Ulrike; et al. (2000). "A novel lipothrixvirus, SIFV, of the extremely thermophilic crenarchaeon Sulfolobus". Virology. 267 (2): 252–266. doi:10.1006/viro.1999.0105.
- Wang, F; Baquero, DP; Beltran, LC; Su, Z; Osinski, T; Zheng, W; Prangishvili, D; Krupovic, M; Egelman, EH (2020). "Structures of filamentous viruses infecting hyperthermophilic archaea explain DNA stabilization in extreme environments". Proceedings of the National Academy of Sciences of the United States of America. 117 (33): 19643–19652. doi:10.1073/pnas.2011125117. PMID 32759221.
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