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Genome Sequence and Characterization of Lactobacillus casei Phage, vB_LcaM_Lbab1 Isolated from Raw Milk. 2021
Victoria Gradaschi, and
Florencia Payaslian, and
Maria Eugenia Dieterle, and
Liliana Rondón Salazar, and
Estefanía Urdániz, and
Matias Di Paola, and
José Peña Cárcamo, and
Fabio Zon, and
Mariana Allievi, and
Ezequiel Sosa, and
Darío Fernandez Do Porto, and
Matthew Dunne, and
Pauline Goeller, and
Jochen Klumpp, and
Raúl Ricardo Raya, and
Alejandro Reyes, and
Mariana Piuri
Departamento de Química Biológica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina.
Only a few Lactobacillus casei phages have so far been characterized. As several L. casei strains are part of probiotic formulations, bacteriophage outbreaks targeting these strains can lead to critical losses within the dairy industry. A new L. casei phage was isolated from raw milk obtained from a milking yard from the province of Buenos Aires. The phage genome was sequenced, annotated, and analyzed. Morphology was determined by electron microscopy and the host range was established. Lactobacillus phage vB_LcaM_Lbab1 is a member of the Herelleviridae family and features a host range including L. casei/Lactobacillus paracasei and Lactobacillus kefiri strains. We further analyzed the baseplate proteins in silico and found putative carbohydrate binding modules that are responsible for host recognition in other Lactobacillus phages. A new Lactobacillus phage was isolated and characterized. The focus was made on its host recognition mechanism, pointing toward the development of future strategies to avoid deleterious infections in the dairy industry.
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