Spounavirinae

Spounavirinae
Virus classification
Group:	Group I (dsDNA)
Order:	Caudovirales
Family:	Myoviridae
Subfamily:	Spounavirinae
Genera
Spounalikevirus Twortlikevirus

Spounavirinae is a subfamily of viruses in the order Caudovirales, in the family Myoviridae. Bacteria serve as natural hosts. There are currently eight species in this subfamily, divided among 2 genera.^[1]^[2]

Taxonomy

Group: dsDNA

Order: Caudovirales

Family: Myoviridae
- Sub-Family: Spounavirinae
  - Genus: Spounalikevirus
    
    Bacillus phage SPO1
  - Genus: Twortlikevirus
    
    Listeria phage A511
    
    Listeria phage P100
    
    Staphylococcus phage G1
    
    Staphylococcus phage K
    
    Staphylococcus phage Twort
  - Genus: Unassigned
    
    Enterococcus phage phiEC24C
    
    Lactobacillus phage LP65

^[2]

Structure

Viruses in Spounavirinae are non-enveloped, with icosahedral and Head-tail geometries, and T=16 symmetry. The diameter is around 84-94 nm, with a length of 140-219 in length, contractile with globular structures at its tip, has 6 long terminal fibers, 6 short spikes and a double base platenm. Genomes are circular, around 130-160kb in length. The genome codes for 190 to 230 proteins.^[1]

Genus	Structure	Symmetry	Capsid	Genomic Arrangement	Genomic Segmentation
Spounalikevirus	Head-Tail	T=16	Non-Enveloped	Linear	Monopartite
Twortlikevirus	Head-Tail	T=16	Non-Enveloped	Linear	Monopartite

Life Cycle

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
Twortlikevirus	Bacteria	None	Injection	Lysis	Cytoplasm	Cytoplasm	Passive diffusion

References

1 2 3 "Viral Zone". ExPASy. Retrieved 1 July 2015.
1 2 ICTV. "Virus Taxonomy: 2014 Release". Retrieved 1 July 2015.

External Links

Baltimore (virus classification)

DNA

I: dsDNA viruses

Caudovirales	Myoviridae Podoviridae Siphoviridae

Herpesvirales	Alloherpesviridae Herpesviridae Malacoherpesviridae

Ligamenvirales	Lipothrixviridae Rudiviridae

Unassigned	NLCDV: Ascoviridae Asfarviridae Iridoviridae Marseilleviridae Mimiviridae Phycodnaviridae Poxviridae genera: Dinodnavirus nonenveloped: Adenoviridae Papillomaviridae Papovaviridae (obsolete) Polyomaviridae genera: Rhizidiovirus Ampullaviridae Baculoviridae Bicaudaviridae Clavaviridae Corticoviridae Fuselloviridae Globuloviridae Guttaviridae Hytrosaviridae Nimaviridae Nudiviridae Plasmaviridae Polydnaviridae Sphaerolipoviridae Tectiviridae Turriviridae genera: Salterprovirus

II: ssDNA viruses

Anelloviridae Bidnaviridae Circoviridae Geminiviridae Inoviridae Microviridae Nanoviridae Parvoviridae Spiraviridae genera: Bacilladnavirus

RNA

III: dsRNA viruses

Amalgaviridae Birnaviridae Chrysoviridae Cystoviridae Endornaviridae Hypoviridae Megabirnaviridae Partitiviridae Picobirnaviridae Quadriviridae Reoviridae Totiviridae

IV: (+)ssRNA viruses (primarily icosahedral)

Nidovirales	Arteriviridae Coronaviridae Mesoniviridae Roniviridae

Picornavirales	Comoviridae (obsolete) Dicistroviridae Iflaviridae Marnaviridae Picornaviridae Secoviridae Sequiviridae (obsolete) genera: Bacillarnavirus Labyrnavirus

Tymovirales	Alphaflexiviridae Betaflexiviridae Gammaflexiviridae Tymoviridae

Unassigned	Alphatetraviridae Alvernaviridae Astroviridae Barnaviridae Benyviridae Bromoviridae Caliciviridae Carmotetraviridae Closteroviridae Flaviviridae Flexiviridae (obsolete) Hepeviridae Leviviridae Luteoviridae Narnaviridae Nodaviridae Permutotetraviridae Potyviridae Tetraviridae (obsolete) Togaviridae Tombusviridae Virgaviridae genera: Cilevirus Higrevirus Idaeovirus Ourmiavirus Polemovirus Sobemovirus

V: (-)ssRNA viruses (primarily helical)

Mononegavirales	Bornaviridae Filoviridae Nyamiviridae Paramyxoviridae Rhabdoviridae

Unassigned	Arenaviridae Bunyaviridae Ophioviridae Orthomyxoviridae genera: Deltavirus Emaravirus Tenuivirus Varicosavirus

VI: ssRNA-RT viruses

Metaviridae Pseudoviridae Retroviridae

VII: dsDNA-RT viruses

Caulimoviridae Hepadnaviridae

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