Title
Structure–Activity Relationships and Action Mechanisms of Collagen-like Antimicrobial Peptides
Author
Ryo Masuda, Yui Dazai, Takehiko Mima, Takaki Koide
Year
2016
Journal
Peptide Science
Abstract
An antimicrobial triple-helical peptide, R3, was previously obtained from a collagen-like combinatorial peptide library. In the present research, based on structure–activity relationship studies of R3, a more potent peptide, RR4, with increased positive net charge and charge density relative to R3, was developed. RR4 exhibited antimicrobial activity against both Gram-negative and Gram-positive bacterial strains, including multidrug resistant strains. Its action could be attributed to entry into cells and interactions with intercellular molecules such as DNA/RNA that inhibited cell division rather than increasing bacterial membrane permeability. Furthermore, RR4 exhibited remarkable stability in serum and low cytotoxicity.
Instrument
J-820
Keywords
Circular dichroism, Secondary structure, Thermal stability, Biochemistry