Pseudomonas virus gh1

Bacteriophage gh-1 is a bacteriophage capable of infecting susceptible strains of Pseudomonas putida.^[1] It is a member of the genus Ghunavirus, family Autotranscriptaviridae, order Autographivirales.^[2] It was first isolated in 1966 from a sample taken from the aeration tank at a sewage plant in East Lansing, Michigan.^[1]

Bacteriophage gh-1
Electron micrograph of bacteriophage gh-1 negatively stained with uranyl acetate. Magnification X 300,000. Two fibers attached to the wedge-shaped tail are visible on the bacteriophage, as indicated by an arrow.
Virus classification
(unranked):	Virus
Realm:	Duplodnaviria
Kingdom:	Heunggongvirae
Phylum:	Uroviricota
Class:	Caudoviricetes
Order:	Autographivirales
Family:	Autotranscriptaviridae
Genus:	Ghunavirus
Species:	Ghunavirus gh1

Sedimentation analysis indicates that gh-1 carries its genetic payload in the form of a 37,359 bp linear strand of dsDNA,^[3][4] inside an icosahedronal capsid 50 nm in diameter.^[1]

One-step growth experiments indicate that the latent period is approximately 21 min, with a burst size of 103.^[1]

It has been shown that this phage group requires an intact O-antigen on its host's outer membrane in order to successfully replicate and it is thus likely that lipopolysaccharide acts as the phage receptor.^[3]