Effects of mscM Gene on Desiccation Resistance in Cronobacter sakazakii
Author Information
Author(s): Zhu Dongdong, Zhang Zhengyang, Li Ping, Du Xinjun, Pista Angela, Batista Rita
Primary Institution: State Key Laboratory of Food Nutrition and Safety, College of Food Science and Engineering, Tianjin University of Science and Technology
Hypothesis
The mscM gene is involved in the desiccation resistance mechanism of Cronobacter sakazakii.
Conclusion
The deletion of the mscM gene enhances desiccation resistance in Cronobacter sakazakii by reducing potassium efflux.
Supporting Evidence
- The inactivation rate of the ΔmscM strain decreased by 15.83% compared to the wild-type strain after desiccation stress.
- The intracellular content of potassium ion (K+) of the ΔmscM strain increased by 2.2-fold compared to the wild-type strain.
- The absence of the mscM gene impaired surface hydrophobicity, adhesion/invasion capability, and biofilm formation of the bacteria.
Takeaway
Scientists studied a gene called mscM in a bacteria that can survive in dry places. They found that when this gene was removed, the bacteria could handle being dry much better.
Methodology
The study involved constructing a mutant strain of C. sakazakii by deleting the mscM gene and comparing its desiccation resistance to wild-type and complementary strains.
Limitations
The study did not explore the long-term effects of mscM deletion on bacterial survival in dry environments.
Statistical Information
P-Value
p<0.01
Statistical Significance
p<0.0001
Digital Object Identifier (DOI)
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