Growth Inhibition and Induction of Stress Protein, GroEL, of Bacillus cereus Exposed to Antibacterial Peptide Isolated from Bacillus subtilis SC-8
This study was conducted to investigate the antibacterial effect of BSAP-254 on Bacillus cereus with the induced stress proteins. The BSAP-254 is an antimicrobial peptide isolated from soybean-fermenting bacteria, Bacillus subtilis SC-8. It had a narrow spectrum of activity against B. cereus group. The growth inhibitory effect of BSAP-254 (50 μg/mL) reduced the population of B. cereus from >108 to 104 colony-forming units per milliliter within 30 min. In B. cereus exposed to BSAP-254, 14 intracellular proteins were differentially expressed as determined by 2-DE coupled with MS. Of the differentially expressed proteins identified, the stress protein GroEL, which is heat shock protein, was induced in B. cereus exposed to antibacterial peptide.
KeywordsAntibacterial effect Bacillus subtilis Bacillus cereus Soybean-fermenting bacteria Food-borne pathogenic bacteria Heat shock protein GroEL
This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (no. 2009–0073489).
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