Role of DEAD-box RNA helicase genes in the growth of Yersinia pseudotuberculosis IP32953 under cold, pH, osmotic, ethanol and oxidative stresses

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Jiang , X , Keto-Timonen , R , Skurnik , M & Korkeala , H 2019 , ' Role of DEAD-box RNA helicase genes in the growth of Yersinia pseudotuberculosis IP32953 under cold, pH, osmotic, ethanol and oxidative stresses ' , PLoS One , vol. 14 , no. 7 , e0219422 . https://doi.org/10.1371/journal.pone.0219422

Title: Role of DEAD-box RNA helicase genes in the growth of Yersinia pseudotuberculosis IP32953 under cold, pH, osmotic, ethanol and oxidative stresses
Author: Jiang, Xiaojie; Keto-Timonen, Riikka; Skurnik, Mikael; Korkeala, Hannu
Contributor: University of Helsinki, Hannu Korkeala / Principal Investigator
University of Helsinki, Food Hygiene and Environmental Health
University of Helsinki, Helsinki One Health (HOH)
University of Helsinki, Helsinki One Health (HOH)
Date: 2019-07-09
Language: eng
Number of pages: 13
Belongs to series: PLoS One
ISSN: 1932-6203
URI: http://hdl.handle.net/10138/304962
Abstract: Yersinia pseudotuberculosis is an important foodborne pathogen threatening modern food safety due to its ability to survive and grow at low temperatures. DEAD-box RNA helicase CsdA has been shown to play an important role in the low-temperature growth of psychrotrophic Y. pseudotuberculosis. A total of five DEAD-box RNA helicase genes (rhlB, csdA, rhlE, dbpA, srmB) have been identified in Y. pseudotuberculosis IP32953. However, their role in various stress conditions used in food production is unclear. We studied the involvement of the DEAD-box RNA helicase-encoding genes in the cold tolerance of Y. pseudotuberculosis IP32953 using quantitative real-time reverse transcription (RT-qPCR) and mutational analysis. Quantitative RT-PCR revealed that mRNA transcriptional levels of csdA, rhlE, dbpA and srmB were significantly higher after cold shock at 3 degrees C compared to non-shocked culture at 28 degrees C, suggesting the involvement of these four genes in cold shock response at the transcriptional level. The deletion of csdA ceased growth, while the deletion of dbpA or srmB significantly impaired growth at 3 degrees C, suggesting the requirement of these three genes in Y. pseudotuberculosis at low temperatures. Growth of each DEAD-box RNA helicase mutant was also investigated under pH, osmotic, ethanol and oxidative stress conditions. The five helicase-encoding genes did not play major roles in the growth of Y. pseudotuberculosis IP32953 under pH, osmotic, ethanol or oxidative stress.
Subject: BIOSYNTHESIS
CSDA
DEGRADOSOME
ESCHERICHIA-COLI
INDUCTION
INSIGHTS
RIBOSOME
SHOCK
STRAINS LACKING
TEMPERATURE
1183 Plant biology, microbiology, virology
416 Food Science
3142 Public health care science, environmental and occupational health
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