Title: Novel virulent and broad-host-range Erwinia amylovora bacteriophages reveal a high degree of mosaicism and a relationship to enterobacteriaceae phages
Authors : Born, Yannick
Fieseler, Lars
Marazzi, Janine
Lurz, Rudi
Duffy, Brion
Loessner, Martin J.
Published in : Applied and environmental microbiology
Volume(Issue) : 77
Issue : 17
Pages : 5945
Pages to: 5954
Publisher / Ed. Institution : American Society for Microbiology
Issue Date: 2011
License (according to publishing contract) : Licence according to publishing contract
Type of review: Peer review (Publication)
Language : English
Subjects : Bacteriophages; Cluster analysis; Viral DNA; Environmental microbiology; Erwinia amylovora; Molecular sequence data; Myoviridae; Phylogeny; Podoviridae; Genetic recombination; DNA sequence analysis; Switzerland; Virion; Host specificity
Subject (DDC) : 570: Biology
Abstract: A diverse set of 24 novel phages infecting the fire blight pathogen Erwinia amylovora was isolated from fruit production environments in Switzerland. Based on initial screening, four phages (L1, M7, S6, and Y2) with broad host ranges were selected for detailed characterization and genome sequencing. Phage L1 is a member of the Podoviridae, with a 39.3-kbp genome featuring invariable genome ends with direct terminal repeats. Phage S6, another podovirus, was also found to possess direct terminal repeats but has a larger genome (74.7 kbp), and the virus particle exhibits a complex tail fiber structure. Phages M7 and Y2 both belong to the Myoviridae family and feature long, contractile tails and genomes of 84.7 kbp (M7) and 56.6 kbp (Y2), respectively, with direct terminal repeats. The architecture of all four phage genomes is typical for tailed phages, i.e., organized into function-specific gene clusters. All four phages completely lack genes or functions associated with lysogeny control, which correlates well with their broad host ranges and indicates strictly lytic (virulent) lifestyles without the possibility for host lysogenization. Comparative genomics revealed that M7 is similar to E. amylovora virus ΦEa21-4, whereas L1, S6, and Y2 are unrelated to any other E. amylovora phage. Instead, they feature similarities to enterobacterial viruses T7, N4, and ΦEcoM-GJ1. In a series of laboratory experiments, we provide proof of concept that specific two-phage cocktails offer the potential for biocontrol of the pathogen.
Departement: Life Sciences and Facility Management
Organisational Unit: Institute of Food and Beverage Innovation (ILGI)
Publication type: Article in scientific Journal
DOI : 10.1128/AEM.03022-10
ISSN: 0099-2240
1098-5336
URI: https://digitalcollection.zhaw.ch/handle/11475/12265
Appears in Collections:Publikationen Life Sciences und Facility Management

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