An antimicrobial peptides-producing Bacillus strain CBS73 was isolated from fermented food (kimchi) that produces low-molecular-weight proteins with broad-spectrum antimicrobial activity. Our goal was to explore the therapeutic potential of antimicrobial substances produced by Bacillus species. Peptide CBS73 was purified from Bacillus subtilis subsp. subtilis with identity of 99.79%. It was found to be stable at pH 4.0-10.0 and temp 20- 60oC. A protein band around 5.2 kDa was detected in tricine-SDS-PAGE and band was confirmed by MALDI-TOF test. Peptide CBS73 showed antimicrobial activity against MDR bacteria. The minimal inhibitory concentration (MIC) of peptide CBS73 for vancomycin-resistant S. aureus (VRSA), vancomycin resistant Enterococci (VRE) and Salmonella typhimurium ranged from 10-40 μg/mL. The antioxidant activity of peptide CBS73 was measured by DPPH scavenging, reducing power activity and total phenolic content. Cell viability and NO production result showed less cytotoxic effect upto 12 μg/mL. Peptide CBS73 could be a promising antimicrobial agent for clinical application.
목차
Abstract 1. Introduction 2. Materials and Methods 2.1. Materials 2.2. Bacterial Strain and Culture Conditions 2.3. Production of AMP and Purification 2.4. Antimicrobial Activity 2.5. Polyacrylamide Gel Electrophoresis and MALDI-TOF 2.6. Stability of AMP 2.7. Effect of Chemicals on AMP Activity 2.8. Effect of Proteolytic Enzymes 2.9. Anti-oxidant Activity of Peptide CBS73 2.10. Cell Viability and NO Production 3. Results and Discussion 3.1. Identifcation of the Bacterial Strain 3.2. Optimization of the Culture Media and Production of AMP 3.3. Purification of Antimicrobial Peptide 3.4. Effects of Temperature and pH on Antimicrobial Activity 3.5. Effect of Chemicals on Antimicrobial Activity 3.6. Effect of Various Proteolytic Enzymes 3.7. Antimicrobial Activity of Peptide CBS73 3.8. Antioxidant Activity of Peptide CBS73 3.9. Cell Viability and NO Production 4. Conclusions Acknowledgement References
조선대학교 기초과학연구원 [The Natural Science Research Institute of Chosun]
설립연도
2008
분야
자연과학>자연과학일반
소개
본 연구원은 기초과학을 진흥하기 위한 연구·교육 및 그 보급을 목적으로 한다. 이 목적을 달성하기 위하여 다음 각 호의 사업을 수행한다.
1. 기초과학 제 분야에 관한 조사와 연구
2. 기초과학에 관한 학술행사(학술대회, 학술세미나, 심포지엄, 초청강연회 등) 개최
3. 학문후속세대 및 일반인을 위한 기초과학 교육
4. 기관지『조선자연과학논문지』 발간
5. 『자연과학연구총서』, 『자연과학번역총서』 등 단행본 발간
6. 기타 본 연구원의 목적과 관련된 사업
간행물
간행물명
통합자연과학논문집(구 조선자연과학논문집) [Journal of Integrative Natural Science]