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Genome Sequence of Salmonella enterica Serovar Typhimurium Bacteriophage MG40

Eddie B Gilcrease1, Justin C Leavitt2, Sherwood R Casjens3,2

  • 1Division of Microbiology and Immunology, Department of Pathology, University of Utah School of Medicine, University of Utah, Salt Lake City, Utah, USA.

Microbiology Resource Announcements
|September 11, 2020
PubMed

Insights

We sequenced the complete genome of the P22-like Salmonella Typhimurium phage MG40. Its prophage repressor specificity differs from other known temperate phages, offering new insights into phage biology.

Area of Science:

  • Microbiology
  • Virology
  • Genomics

Background:

  • Bacteriophages, or phages, are viruses that infect bacteria.
  • Temperate phages can integrate their genome into the host or replicate independently.
  • Salmonella enterica serovar Typhimurium is a significant human pathogen.

Purpose of the Study:

  • To determine the complete genome sequence of the P22-like Salmonella Typhimurium phage MG40.
  • To characterize the specificity of the phage MG40 prophage repressor.
  • To compare the repressor specificity with other known temperate phages.

Main Methods:

  • Whole-genome sequencing of phage MG40.
  • Bioinformatic analysis of the phage genome.
  • Comparative analysis of repressor protein sequences and predicted functions.

Main Results:

  • The complete genome sequence of Salmonella Typhimurium phage MG40 was obtained.
  • Phage MG40 exhibits P22-like characteristics.
  • The prophage repressor of MG40 displays a distinct specificity compared to other characterized temperate phages.

Conclusions:

  • The unique repressor specificity of phage MG40 provides novel information on temperate phage regulation.
  • This finding contributes to understanding phage-host interactions and the diversity of phage genomes.
  • Further studies on MG40 could elucidate new mechanisms of phage control and bacterial immunity.

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