4.6 Article

Novel Phage Group Infecting Lactobacillus delbrueckii subsp lactis, as Revealed by Genomic and Proteomic Analysis of Bacteriophage Ldl1

Journal

APPLIED AND ENVIRONMENTAL MICROBIOLOGY
Volume 81, Issue 4, Pages 1319-1326

Publisher

AMER SOC MICROBIOLOGY
DOI: 10.1128/AEM.03413-14

Keywords

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Funding

  1. Irish Research Council (IRC) Enterprise Partnership Scheme
  2. Principal Investigator award through Science Foundation Ireland (SFI) [13/IA/1953]
  3. Hercules Foundation (Belgium) [R-3986]

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Ldl1 is a virulent phage infecting the dairy starter Lactobacillus delbrueckii subsp. lactis LdlS. Electron microscopy analysis revealed that this phage exhibits a large head and a long tail and bears little resemblance to other characterized phages infecting Lactobacillus delbrueckii. In vitro propagation of this phage revealed a latent period of 30 to 40 min and a burst size of 59.9 +/- 1.9 phage particles. Comparative genomic and proteomic analyses showed remarkable similarity between the genome of Ldl1 and that of Lactobacillus plantarum phage ATCC 8014-B2. The genomic and proteomic characteristics of Ldl1 demonstrate that this phage does not belong to any of the four previously recognized L. delbrueckii phage groups, necessitating the creation of a new group, called group e, thus adding to the knowledge on the diversity of phages targeting strains of this industrially important lactic acid bacterial species.

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