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자료유형
학술저널
저자정보
Sangyong Lim (Korea Atomic Energy Research Institute) Ahreum Han (Korea Atomic Energy Research Institute) Dongho Kim (Korea Atomic Energy Research Institute) Ho Seong Seo (Korea Atomic Energy Research Institute)
저널정보
대한미생물학회 JOURNAL OF BACTERIOLOGY AND VIROLOGY JOURNAL OF BACTERIOLOGY AND VIROLOGY Vol.45 No.3
발행연도
2015.9
수록면
200 - 214 (15page)

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Salmonella causes a wide variety of diseases ranging from mild diarrhea to severe systemic infections, such as like typhoid fever, in multiple organisms, ranging from mice to humans. A lack of ptsI, which encodes the first component of phosphoenolpyruvate (PEP) : carbohydrate phosphotransferase system (PTS), is known to cause Salmonella Typhimurium attenuation; however, the mechanisms behind this have not yet been elucidated. In this study, a DNA microarray was performed to determine why the virulence of ptsI mutants is attenuated under low-oxygen conditions in which the ptsI expression is enhanced. Of 106 down-regulated genes, the most repressed were pdu and tdc genes, which are required for propanediol utilization and threonine and serine metabolism, respectively. In addition, half the flagellar genes were down-regulated in the ptsI mutant strain. Because pdu genes are induced during infection and Tdc products and flagellamediated motility are necessary for the invasion of S. Typhimurium, the invasive ability of ptsI mutants was examined. We found that ptsI mutation reduced the ability of S. Typhimurium to invade into host cells, suggesting that reduced expression of the pdu, tdc, and flagellar genes is involved in the attenuation of ptsI mutants.

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INTRODUCTION
MATERIALS AND METHODS
RESULTS
DISCUSSION
REFERENCES

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