Lacz reporter system as a tool to study virulence gene regulation in bacterial pathogens

Gili Aviv, Ohad Gal-Mor*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

11 Scopus citations

Abstract

β-galactosidase assay has been established as one of the most widely used reporters and can be effectually exploited to study promoter activity of Salmonella and other pathogens under various conditions. This method includes a preliminary stage of fusing the target promoter to a promoter-less lacZ gene encoding for the enzyme β-galactosidase. Supplementation of the synthetic ONPG substrate results in the accumulation of a chromogenic product proportionally to the activity of the fused promoter. Here we demonstrate the usage of this reporter system to study the regulation of the Salmonella Type three secretion system effector gene sseL in S. Typhimurium [1].

Original languageEnglish
Title of host publicationMethods in Molecular Biology
PublisherHumana Press Inc.
Pages39-45
Number of pages7
DOIs
StatePublished - 2018

Publication series

NameMethods in Molecular Biology
Volume1734
ISSN (Print)1064-3745

Keywords

  • Beta-galactosidase (β-gal)
  • Gene regulation
  • LacZ
  • Lactose operon
  • O-nitrophenyl-β-d-galactoside (ONPG)
  • Reporter

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