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Interactions between the Prophage 919TP and Its Vibrio cholerae Host: Implications of gmd Mutation for Phage Resistance, Cell Auto-Aggregation, and Motility.
Li, Na; Zeng, Yigang; Hu, Bijie; Zhu, Tongyu; Svenningsen, Sine Lo; Middelboe, Mathias; Tan, Demeng.
Afiliação
  • Li N; Zhongshan Hospital, Fudan University, Shanghai 200032, China.
  • Zeng Y; Shanghai Public Health Clinical Center, Fudan University, Shanghai 201508, China.
  • Hu B; Zhongshan Hospital, Fudan University, Shanghai 200032, China.
  • Zhu T; Zhongshan Hospital, Fudan University, Shanghai 200032, China.
  • Svenningsen SL; Department of Biology, University of Copenhagen, 2200 Copenhagen, Denmark.
  • Middelboe M; Department of Biology, University of Copenhagen, 2200 Copenhagen, Denmark.
  • Tan D; Shanghai Public Health Clinical Center, Fudan University, Shanghai 201508, China.
Viruses ; 13(12)2021 11 23.
Article em En | MEDLINE | ID: mdl-34960610
ABSTRACT
Prophage 919TP is widely distributed among Vibrio cholera and is induced to produce free φ919TP phage particles. However, the interactions between prophage φ919TP, the induced phage particle, and its host remain unknown. In particular, phage resistance mechanisms and potential fitness trade-offs, resulting from phage resistance, are unresolved. In this study, we examined a prophage 919TP-deleted variant of V. cholerae and its interaction with a modified lytic variant of the induced prophage (φ919TP cI-). Specifically, the phage-resistant mutant was isolated by challenging a prophage-deleted variant with lytic phage φ919TP cI-. Further, the comparative genomic analysis of wild-type and φ919TP cI--resistant mutant predicted that phage φ919TP cI- selects for phage-resistant mutants harboring a mutation in key steps of lipopolysaccharide (LPS) O-antigen biosynthesis, causing a single-base-pair deletion in gene gmd. Our study showed that the gmd-mediated O-antigen defect can cause pleiotropic phenotypes, e.g., cell autoaggregation and reduced swarming motility, emphasizing the role of phage-driven diversification in V. cholerae. The developed approach assists in the identification of genetic determinants of host specificity and is used to explore the molecular mechanism underlying phage-host interactions. Our findings contribute to the understanding of prophage-facilitated horizontal gene transfer and emphasize the potential for developing new strategies to optimize the use of phages in bacterial pathogen control.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Cólera / Antígenos O / Vibrio cholerae O1 / Prófagos Tipo de estudo: Prognostic_studies Idioma: En Revista: Viruses Ano de publicação: 2021 Tipo de documento: Article País de afiliação: China

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Cólera / Antígenos O / Vibrio cholerae O1 / Prófagos Tipo de estudo: Prognostic_studies Idioma: En Revista: Viruses Ano de publicação: 2021 Tipo de documento: Article País de afiliação: China