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Virus classification
Group: Group I (dsDNA)
Order: Caudovirales
Family: Myoviridae
Subfamily: Spounavirinae
Genus: Spounalikevirus
Type Species
  • Bacillus phage SPO1

Spounalikevirus is a genus of viruses in the order Caudovirales, in the family Myoviridae, in the subfamily Spounavirinae. Bacteria serve as natural hosts. There is currently only one species in this genus: the type species Bacillus phage SPO1.[1][2][3]


Group: dsDNA



Viruses in Spounalikevirus are non-enveloped, with head-tail geometries, and T=16 symmetry. The diameter is around 108 nm, with a length of 140 nm. Genomes are linear, around 145kb in length. The genome codes for 200 proteins.[1]

Genus Structure Symmetry Capsid Genomic arrangement Genomic segmentation
Spounalikevirus Head-Tail T=16 Non-enveloped Linear Monopartite

Life cycle[edit]

Viral replication is cytoplasmic. Entry into the host cell is achieved by adsorption into the host cell. DNA-templated transcription is the method of transcription. Bacteria serve as the natural host. Transmission routes are passive diffusion.[1]

Genus Host details Tissue tropism Entry details Release details Replication site Assembly site Transmission
Spounalikevirus Bacteria None Injection Lysis Cytoplasm Cytoplasm Passive diffusion

Taxonomic history[edit]

  • Bacillus phage SP8 was assigned to the family Myoviridae in 1995.
  • Bacillus phage SPO1 was assigned to the genus SPO1-like phages in 1996 as type species.
  • Myoviridae were assigned to the order Caudovirales in 1998
  • SPO1-like phages were renamed SPO1-like viruses in 1999
  • Bacillus phage SP8 was merged into Bacillus phage SPO1 in 1999 (as type species) of SPO1-like viruses.
  • SPO1-like viruses were assigned to the sub-family Spounavirinae (of Caudovirales) in 2011.
  • SPO1-like viruses were renamed Spounalikevirus in 2012


  1. ^ a b c "Viral Zone". ExPASy. Retrieved 1 July 2015. 
  2. ^ a b ICTV. "Virus Taxonomy: 2014 Release". Retrieved 1 July 2015. 
  3. ^ Encyclopedia of Virology. p. 1681. 

External links[edit]