In a previous study, we showed that Cecropin A (1-8)-Magainin 2 (1-12) hybrid peptide (CA-MA)’s analogue, Anal P5, exhibit broad-spectrum antimicrobial activity. Anal P5, designed by flexible region (positions 9, 10)-substitution, Lys-(positions 4, 8, 14, 15) and Leu- (positions 5, 6, 12, 13, 16, 17, 20) substitutions, showed an enhanced antimicrobial and antitumor activity without hemolysis. The primary objective of the present study was to gain insight into the relevant mechanisms of antimicrobial activities of Anal P5 by using flow cytometric analysis. Anal P5 exhibits strong antifungal activity in a salt concentration independent manner. In addition, Anal P5 causes significant morphological alterations of the bacterial surfaces as shown by scanning electron microscopy, supporting its antibacterial activity. Its potent antibiotic activity suggests that Anal P5 is an excellent candidate as a lead compound for the development of novel antibiotic agents.
목차
Abstract 1. Introduction 2. Materials and methods 2.1. Peptide synthesis 2.2. Antibacterial activity 2.3. Antifungal activity assay 2.4. Salt-dependency test 2.5. Scanning electron microscopy (SEM) 2.6. Circular dichroism (CD) analysis 3. Results and discussion 3.1. Design and synthesis of the peptides 3.2. Antimicrobial activity 3.3. Effects of salts on antimicrobial activity 3.4. Analysis of the peptide under bacteria morphology by scanning electron microscopy 3.5. Structural analysis of peptides by CD measurements 4. Conclusions References
키워드
CA (1-8)-MA (1-12) hybrid peptide (CA-MA); CA-MA analogue P5 (Anal P5); Lys- and Leu- substitutions
저자
Yoonkyung Park [ Department of Cellular Molecular Medicine, School of Medicine ]
Corresponding author
Kyung-Soo Hahm [ Biotechnology and BK21 Research Team for Protein Activity ]
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]