Species of virus
Enterobacteria phage P4 (also known as satellite phage P4) is a temperate bacteriophage strain of species "Escherichia virus P2" within genus "Peduovirus" (formerly "P2-like viruses", "P2virus", and "P2likevirus"), subfamily "Peduovirinae", family "Myoviridae". It is a satellite virus, requiring P2-related helper phage to grow lytically.
Structure.
The P4 virion has a tail and an icosahedral head containing a linear double-stranded DNA genome of 11,627 kb.
Life cycle.
Phage P4 infects "Escherichia coli". It is a satellite virus which cannot engage in lytic growth without the presence of a P2-related helper phage. It generally follows a lysogenic life cycle: after infection, the P4 genome integrates into that of its host. The P4 genome can also exist on its own within the host cell and can replicate as a free plasmid.
References.
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