Coping with inadvertent lysis of Escherichia coli cultures: Strains resistant to lysogeny and infection by the stealthy lysogenic phage Φ80

Swaminath Srinivas, John E Cronan

Research output: Contribution to journalArticle

Abstract

Phage Φ80 can infect Escherichia coli in a stealthy manner and persist by forming lysogens. Such Φ80 lysogens are fairly common and often go undetected unless the host is grown at temperatures below 37°C. Since low growth temperatures are required for growing temperature-sensitive mutants and often preferred for large-scale applications such as protein production, Φ80-resistant strains would be useful. We report the construction of E. coli strains that cannot be efficiently lysogenized or infected by bacteriophage Φ80. These strains contain combinations of deletions or mutations in the bacterial attachment site for Φ80 integration and/or deletions in the genes required for phage absorption to the host outer membrane. These strains should help contain and prevent Φ80 infection of E. coli cultures in a laboratory or industrial setting.

Original languageEnglish (US)
Pages (from-to)1820-1826
Number of pages7
JournalBiotechnology and bioengineering
Volume116
Issue number7
DOIs
StatePublished - Jul 2019

Fingerprint

Lysogeny
Bacteriophages
Escherichia coli
Temperature
Microbiological Attachment Sites
Infection
Escherichia coli Infections
Sequence Deletion
Gene Deletion
Growth temperature
Genes
Proteins
Membranes
Growth

Keywords

  • contamination
  • fhuA
  • lysis
  • lysogen
  • phage
  • tonA
  • tonB
  • Φ80

ASJC Scopus subject areas

  • Biotechnology
  • Bioengineering
  • Applied Microbiology and Biotechnology

Cite this

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abstract = "Phage Φ80 can infect Escherichia coli in a stealthy manner and persist by forming lysogens. Such Φ80 lysogens are fairly common and often go undetected unless the host is grown at temperatures below 37°C. Since low growth temperatures are required for growing temperature-sensitive mutants and often preferred for large-scale applications such as protein production, Φ80-resistant strains would be useful. We report the construction of E. coli strains that cannot be efficiently lysogenized or infected by bacteriophage Φ80. These strains contain combinations of deletions or mutations in the bacterial attachment site for Φ80 integration and/or deletions in the genes required for phage absorption to the host outer membrane. These strains should help contain and prevent Φ80 infection of E. coli cultures in a laboratory or industrial setting.",
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