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Open Access Highly Accessed Research article

Sequencing and Characterization of Pseudomonas aeruginosa phage JG004

Julia Garbe12, Boyke Bunk1, Manfred Rohde3 and Max Schobert1*

Author Affiliations

1 Institute of Microbiology, Technische Universität Braunschweig, Spielmannstr. 7, 38106 Braunschweig, Germany

2 Current Address: Department of Clinical Sciences, Division of Infection Medicine, Biomedical Centre B14, Sölvegatan 19, 22362 Lund, Sweden

3 HZI. Helmholtz Centre for Infection Research, Inhoffenstr. 7, 38124 Braunschweig, Germany

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BMC Microbiology 2011, 11:102  doi:10.1186/1471-2180-11-102

Published: 14 May 2011

Abstract

Background

Phages could be an important alternative to antibiotics, especially for treatment of multiresistant bacteria as e.g. Pseudomonas aeruginosa. For an effective use of bacteriophages as antimicrobial agents, it is important to understand phage biology but also genes of the bacterial host essential for phage infection.

Results

We isolated and characterized a lytic Pseudomonas aeruginosa phage, named JG004, and sequenced its genome. Phage JG004 is a lipopolysaccharide specific broad-host-range phage of the Myoviridae phage family. The genome of phage JG004 encodes twelve tRNAs and is highly related to the PAK-P1 phage genome. To investigate phage biology and phage-host interactions, we used transposon mutagenesis of the P. aeruginosa host and identified P. aeruginosa genes, which are essential for phage infection. Analysis of the respective P. aeruginosa mutants revealed several characteristics, such as host receptor and possible spermidine-dependance of phage JG004.

Conclusions

Whole genome sequencing of phage JG004 in combination with identification of P. aeruginosa host genes essential for infection, allowed insights into JG004 biology, revealed possible resistance mechanisms of the host bacterium such as mutations in LPS and spermidine biosynthesis and can also be used to characterize unknown gene products in P. aeruginosa.