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http://dx.doi.org/10.5352/JLS.2007.17.2.298

Identification and Chararterization of Stationary-phase Specific Cytosolic Protein in Salmonella typhimurium  

Yoo, Ah-Young (Division of Biological Sciences, Pusan National University)
Kim, Young-Hee (Division of Biological Sciences, Pusan National University)
Yu, Jong-Earn (Division of Biological Sciences, Pusan National University)
Kim, Sam-Woong (Division of Biological Sciences, Pusan National University)
Baik, Hyung-Suk (Division of Biological Sciences, Pusan National University)
Kang, Ho-Young (Division of Biological Sciences, Pusan National University)
Publication Information
Journal of Life Science / v.17, no.2, 2007 , pp. 298-304 More about this Journal
Abstract
Salmonella is facultative intracellular pathogen that can survive and replicate in macrophages even though these cells are equipped with a plethora of anti-microbial mechanisms. To survive in this hostile intracellular environment, Salmonella has evolved numerous defense mechartisms. An approximately 20 kDa protein was detected as a stationary-phase specific protein band in cytosolic fraction. It was identified as a DNA binding protein in stationary phase (Dps) by analysis of MALDI-TOF assay. It has been known that Dps, the protein produced in the stationary phase of bacteria, allows DNA to form chromatin by binding to DNA nonspecifically and protects DNA from reactive oxidative species (ROS). For further study, Dps specific polyclonal antibodies were generated by injection of purified Dps protein into rabbit. To examine the Finfluence of several regulatory proteins in the expression dps gene, Dps protein level in various S. typhimurium mutants defecting regulatory proteins were investigated by Westernblot using Dps specific polyclonal antibodies.
Keywords
Salmonella typhimurium; stationary phase; Dps;
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