Abstract
Phage genomic information and the nature of host-phage interactions are important for phage applications. In this study, Pseudomonas aeruginosa phage K5 is characterized as a linear double-stranded genomic DNA molecule of 93,754 bp with identical 1182-bp direct terminal repeats. Comparative genomic analysis reveals that phage K5 is highly homologous to the "PaP1-like" phages. Thirteen mutants resistant to phage K5 are screened in a transposon mutant library. The disrupted genetic loci are identified as gene Y880_RS05480 encoding a putative O-antigen polymerase Wzy and gene wapH encoding a glycosyltransferase. The mutants are confirmed by the complementation experiment. The production of biofilm and the profile of lipopolysaccharide (LPS) are further analyzed in the Y880_RS05480 mutant. Our data indicate that LPS is the receptor of phage K5.
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