Siphoviridae

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? Siphoviridae
Virus classification
Group: Group I (dsDNA) Order: Caudovirales Family: Siphoviridae
Genera
λ-like viruses T1-like viruses T5-like viruses c2-like viruses L5-like viruses ψM1-like viruses φC31-like viruses N15-like viruses

Siphoviridae are a family of double-stranded DNA viruses infecting only bacteria that are characterized by a long non-contractile tail and an isometric capsid (morphotype B1) or a prolate capsid (morphotype B2).

The Siphoviridae viruses have a capsid with a diameter of about 55-60 nm and a long tail that can reach up to 570 nm. Their double-stranded DNA is linear. This family includes the phage λ, the phage χ and the phage φ80.

The following genera are included here:

• Genus λ-like viruses; type species: Enterobacteria phage λ
• Genus T1-like viruses; type species: Enterobacteria phage T1
• Genus T5-like viruses; type species: Enterobacteria phage T5
• Genus c2-like viruses; type species: Lactococcus phage c2
• Genus L5-like viruses; type species: Mycobacterium phage L5
• Genus ψM1-like viruses; type species: Methanobacterium ψM1
• Genus φC31-like viruses; type species: Streptomyces phage φC31
• Genus N15-like viruses; type species: Enterobacteria phage N15